This Prospectus, including
the documents incorporated by reference herein, contains “forward-looking statements” or “forward-looking information”
within the meaning of applicable securities legislation. Forward-looking information is provided as of the date of this Prospectus
and the Corporation does not intend, and does not assume any obligation, to update this forward-looking information, except as
required by law.
Generally, forward-looking
information can be identified by the use of forward-looking terminology such as “plans”, “expects” or “does
not expect”, “is expected”, “budget”, “scheduled”, “estimates”, “forecasts”,
“intends”, “anticipates” or “does not anticipate”, or “believes”, or variations
of such words and phrases or statements that certain actions, events or results “may”, “could”, “would”,
“might” or “will be taken”, “occur” or “be achieved”. Forward-looking information
is based on reasonable assumptions that have been made by Sandstorm Gold as at the date of such information and is subject to known
and unknown risks, uncertainties and other factors that may cause the actual actions, events or results to be materially different
from those expressed or implied by such forward-looking information, including but not limited to: the impact of general business
and economic conditions; the absence of control over mining operations from which Sandstorm Gold will purchase gold and other metals
or from which it will receive royalty payments and risks related to those mining operations, including risks related to international
operations, government and environmental regulation, delays in mine construction and operations, actual results of mining and current
exploration activities, conclusions of economic evaluations and changes in project parameters as plans continue to be refined;
problems inherent to the marketability of gold and other metals; industry conditions, including fluctuations in the price of the
primary commodities mined at such operations, fluctuations in foreign exchange rates and fluctuations in interest rates; government
entities interpreting existing tax legislation or enacting new tax legislation in a way which adversely affects Sandstorm Gold;
stock market volatility; competition; as well as those factors discussed in the section entitled “Risk Factors” in
its annual information form dated March 29, 2018 and incorporated by reference herein.
Forward-looking information
in this Prospectus, or incorporated by reference herein, includes, among other things, disclosure regarding: Sandstorm Gold’s
existing gold streams and royalties; as well as its future outlook and Mineral Resource and Mineral Reserve estimates for each
of the Santa Elena mine, the Chapada mine, the Houndé mine and the Hod Maden project, production and cost estimates, and
expected plans. Documents incorporated by reference, such as the annual information form dated March 29, 2018 and management’s
discussion and analysis for the year ended December 31, 2018 include forward-looking information with respect to, among other things,
the Corporation’s corporate development and strategy.
Forward-looking information
is based on assumptions management believes to be reasonable, including but not limited to the continued operation of the mining
operations from which Sandstorm Gold will purchase gold and other metals, or from which it will receive royalty payments, no material
adverse change in the market price of commodities, that the mining operations will operate in accordance with their public statements
and achieve their stated production outcomes, and such other assumptions and factors as set out therein.
Although Sandstorm
Gold has attempted to identify important factors that could cause actual actions, events or results to differ materially from those
contained in forward-looking information, there may be other factors that cause actions, events or results not to be as anticipated,
estimated or intended. There can be no assurance that such information will prove to be accurate, as future actions and events
and actual results could differ materially from those anticipated in such information. Accordingly, readers should not place undue
reliance on forward-looking information.
DOCUMENTS INCORPORATED BY REFERENCE
Information has
been incorporated by reference in this Prospectus from documents filed with the securities commissions or similar authorities in
Canada.
Copies of the documents incorporated herein by reference may be obtained on request without charge from the Corporate
Secretary of Sandstorm Gold Ltd. at Suite 1400, 400 Burrard Street, Vancouver, British Columbia, V6C 3A6, telephone (604) 628-1107,
and are also available electronically at
www.sedar.com
. Documents filed with, or furnished to, the SEC are available through
the SEC’s Electronic Data Gathering and Retrieval System (“
EDGAR
”) at www.sec.gov. The filings of the
Corporation through the System for Electronic Document Analysis and Retrieval (“
SEDAR
”) and through EDGAR are
not incorporated by reference in this Prospectus except as specifically set out herein.
The following documents,
filed by the Corporation with the securities commissions or similar authorities in each of the provinces of Canada, except the
Province of Québec, and in the Northwest Territories are specifically incorporated by reference into, and form an integral
part of, this Prospectus:
|
(a)
|
the annual information form (the “
Annual Information Form
”) of the Corporation
dated March 29, 2018 for the financial year ended December 31, 2017;
|
|
(b)
|
the audited consolidated annual financial statements of the Corporation as at, and for the years
ended December 31, 2018 and 2017, together with the report of the independent registered public accounting firm thereon and the
notes thereto;
|
|
(c)
|
management’s discussion and analysis for the year ended December 31, 2018; and
|
|
(d)
|
the management information circular of the Corporation dated April 27, 2018 prepared in connection
with the annual and special meeting of shareholders of the Corporation held on June 15, 2018.
|
Any document of the
type referred to item 11.1 of Form 44-101F1
Short Form Prospectus
under National Instrument 44-101 –
Short Form
Prospectus Distributions
of the CSA filed by the Corporation with any securities commissions or similar regulatory authorities
in Canada after the date of this Prospectus and all Prospectus Supplements disclosing additional or updated information filed pursuant
to the requirements of applicable securities legislation in Canada during the period that this Prospectus is effective shall be
deemed to be incorporated by reference in this Prospectus. These documents are available on SEDAR, which can be accessed at www.sedar.com.
In addition, any document filed by the Corporation with, or furnished by the Corporation to, the SEC pursuant to Section 13(a)
or 15(d) of the Exchange Act subsequent to the date of this Prospectus shall be deemed to be incorporated by reference as an exhibit
to the Registration Statement of which this Prospectus forms a part (in the case of any report on Form 6-K, if and to the extent
expressly provided in such report).
Any statement contained
in a document incorporated or deemed to be incorporated by reference herein shall be deemed to be modified or superseded for the
purposes of this Prospectus to the extent that a statement contained herein, or in any other subsequently filed document which
also is incorporated or is deemed to be incorporated by reference herein, modifies or supersedes such statement. The modifying
or superseding statement need not state that it has modified or superseded a prior statement or include any other information set
forth in the document that it modifies or supersedes. The making of a modifying or superseding statement will not be deemed an
admission for any purposes that the modified or superseded statement, when made, constituted a misrepresentation, an untrue statement
of a material fact or an omission to state a material fact that is required to be stated or that is necessary to make a statement
not misleading in light of the circumstances in which it was made. Any statement so modified or superseded shall not be deemed
in its unmodified or superseded form to constitute a part of this Prospectus.
Upon a new annual
information form and the related annual consolidated financial statements being filed by us with the appropriate securities regulatory
authorities during the currency of this Prospectus, the previous Annual Information Form, audited consolidated annual financial
statements and all unaudited condensed consolidated interim financial reports, material change reports, and all Prospectus Supplements
filed by us prior to the commencement of our fiscal year in which the new annual information form and the related annual consolidated
financial statements is filed will be deemed no longer to be incorporated by reference in this Prospectus for purposes of future
offers of Securities hereunder. Upon a management information circular in connection with an annual meeting being filed by us with
the appropriate securities regulatory authorities during the currency of this Prospectus, the management information circular filed
in connection with the previous annual meeting (unless such management information circular also related to a special meeting)
will be deemed no longer to be incorporated by reference in this Prospectus for purposes of future offers of Securities hereunder.
A Prospectus Supplement
containing the specific terms of any Offering of Securities will be delivered to purchasers of Securities together with this Prospectus
and will be deemed to be incorporated by reference in this Prospectus as of the date of the Prospectus Supplement and only for
the purposes of the Offering to which that Prospectus Supplement pertains.
TECHNICAL AND THIRD PARTY INFORMATION
Except where otherwise
stated, the disclosure in this Prospectus and in the documents incorporated by reference, relating to properties and operations
on the properties in which the Corporation holds royalty, stream or other interests, including the disclosure included in the sections
entitled “General Development of the Business”, “Description of the Business” and “Technical Information”
in the Corporation’s Annual Information Form, is based on information publicly disclosed by the owners or operators of these
properties and information/data available in the public domain as at the date hereof or as of the date of (or as specified in)
the document incorporated by reference herein, as applicable, and none of this information has been independently verified by the
Corporation. Specifically, as a royalty or stream holder, the Corporation has limited, if any, access to properties included in
its asset portfolio. Additionally, the Corporation may from time to time receive operating information from the owners and operators
of the properties, which it is not permitted to disclose to the public. The Corporation is dependent on, (i) the operators of the
properties and their qualified persons to provide information to the Corporation, or (ii) on publicly available information to
prepare disclosure pertaining to properties and operations on the properties on which the Corporation holds royalty, stream or
other interests, and generally has limited or no ability to independently verify such information. Such information is necessarily
imprecise because it depends upon the judgment of the individuals who operate the properties on which the Corporation holds royalty,
stream or other interests. Although the Corporation does not have any knowledge that such information may not be accurate, there
can be no assurance that such third party information is complete or accurate. Some information publicly reported by operators
may relate to a larger property than the area covered by the Corporation’s royalty, stream or other interest. The Corporation’s
royalty, stream or other interests often cover less than 100% and sometimes only a portion of the publicly reported Mineral Reserves,
Mineral Resources and production of a property.
The disclosure in this
Prospectus and in the documents incorporated by reference herein relating to Mineral Reserve and Mineral Resource statements for
individual properties is made as at the dates indicated. In addition, numerical information presented in the documents incorporated
by reference herein which has been derived from information publicly disclosed by owners or operators may have been rounded by
the Corporation and, therefore, there may be some inconsistencies within the documents incorporated by reference herein with respect
to significant digits presented in the information publicly disclosed by owners or operators.
The Corporation considers
its stream and royalty interests in the Santa Elena mine, the Chapada mine, the Houndé mine and the Hod Maden project to
be its only material mineral properties for the purposes of NI 43-101. Information contained in this Prospectus or incorporated
by reference herein with respect to each of the Santa Elena mine, the Chapada mine and the Houndé mine has been prepared
in accordance with the exemption set forth in section 9.2 of NI 43-101.
Unless otherwise noted,
the disclosure contained herein or in the documents incorporated herein by reference of a scientific or technical nature for the
Santa Elena mine is based on (i) the technical report entitled “Update to Santa Elena Pre-Feasibility Study, Sonora, Mexico”
dated March 31, 2015, and having an effective date of December 31, 2014, which technical report was prepared for SilverCrest Mines
Inc. (“
SilverCrest
”) (now First Majestic Silver Corp. (“
First Majestic
”)), and filed under
First Majestic’s SEDAR profile on October 1, 2015 (the “
Santa Elena Report
”); and (ii) information that
has been provided by First Majestic, and has been sourced from First Majestic’s news releases with respect to the Santa Elena
mine dated March 29, 2018, January 14, 2019 and First Majestic’s annual information form dated March 29, 2018 for the year
ended December 31, 2017 (“
First Majestic AIF
”).
The technical and scientific
information contained herein relating to the Santa Elena mine was reviewed and approved in accordance with NI 43-101 by Ramon Mendoza
Reyes, P. Eng., Vice President Technical Services for First Majestic, a qualified person under NI 43-101.
Unless otherwise noted,
the disclosure contained herein or in the documents incorporated herein by reference of a scientific or technical nature for the
Chapada mine is based on (i) the technical report entitled “Technical Report on the Chapada Mine, Goiás State, Brazil”
dated March 21, 2018, which technical report was prepared for Yamana Gold Inc. (“
Yamana
”), and filed under Yamana’s
SEDAR profile on March 29, 2018; and (ii) information that has been provided by Yamana, and has been sourced from Yamana’s
news releases with respect to the Chapada mine dated February 15, 2018 and Yamana’s annual information form dated March 27,
2018 for the year ended December 31, 2017.
The technical and scientific
information contained herein and in the Annual Information Form relating to the Chapada mine was reviewed and approved in accordance
with NI 43-101 by Sébastien B. Bernier, MSc., PGeo., Senior Director, Geology and Mineral Resources for Yamana, a qualified
person under NI 43-101.
Unless otherwise noted,
the disclosure contained herein or in the documents incorporated herein by reference of a scientific or technical nature for the
Houndé mine is based on (i) the technical report entitled “Houndé Gold Project – Burkina Faso –
Feasibility Study NI 43-101 Technical Report” dated October 31, 2013, which technical report was prepared for Endeavour Mining
Corporation (“
Endeavour
”), and filed under Endeavour’s SEDAR profile on December 2, 2013; and (ii) Endeavour’s
annual information form dated March 29, 2018 for the year ended December 31, 2017.
The technical and scientific
information contained herein and in the Annual Information Form relating to the Houndé mine was reviewed and approved in
accordance with NI 43-101 by Keith Laskowski, MSc., Vice President Technical Services for the Corporation, a qualified person under
NI 43-101.
Unless otherwise noted,
the disclosure contained herein or in the documents incorporated herein by reference of a scientific or technical nature for the
Hod Maden project is based on the technical report entitled “Hod Maden Project Pre Feasibility Study NI 43-101” having
an effective date of May 31, 2018, which technical report was prepared for the Corporation, and filed on the Corporation’s
SEDAR profile on June 26, 2018 (the “
Hod Maden Report
”).
The technical and scientific
information contained herein relating to the Hod Maden project was reviewed and approved in accordance with NI 43-101 by Rodney
Webster, M.AIG., Principal Geologist, AMC Consultants Pty Ltd (“
AMC
”), Andrew Hall, MAusIMM CP(Mining), Director/Principal
Consultant, AMC, Paul Newling, FAusIMM CP(Metallurgy), Managing Director, NewPro Consulting & Engineering Services Pty Ltd
and Zafir Ekmekçi, SME RM, Principal, Hacettepe Mineral Teknolojileri Ltd. Şti, each a qualified person under NI 43-101.
All other scientific
and technical information contained herein and the documents incorporated by reference and not otherwise covered by any other named
expert has been reviewed and approved in accordance with NI 43-101 by Keith Laskowski, MSc., Vice President Technical Services
for the Corporation, a qualified person under NI 43-101.
DOCUMENTS FILED AS PART OF THE REGISTRATION
STATEMENT
The following documents
have been or will be filed with the SEC as part of the registration statement of which this Prospectus forms a part: (i) the documents
listed under the heading “Documents Incorporated by Reference”; (ii) powers of attorney from our directors and officers,
as applicable (included on the signature page to the registration statement); (iii) the consent of PricewaterhouseCoopers LLP;
(iv) the consent of each expert or “qualified person” (for the purposes of NI 43-101) listed on the Exhibit Index of
the registration statement; and (v) the consent of Canadian counsel, Cassels Brock & Blackwell LLP.
THE CORPORATION
Sandstorm Gold is a
non-operating gold streaming royalty company which generates its revenue primarily from the sale of gold and other metals, and
from the receipt of royalty payments. Sandstorm Gold currently has a portfolio of 188 Gold Streams and net smelter return (“
NSR
”)
and other royalty agreements, of which 20 of the underlying mines are producing.
Sandstorm Gold is a
growth-focused company that seeks to acquire gold and other precious metals purchase agreements (each, a “
Gold Stream
”)
and royalties from companies which have advanced stage development projects or operating mines. In return for making upfront payments
to acquire a Gold Stream, Sandstorm Gold receives the right to purchase, at a fixed price per unit or at variable prices passed
on spot, a percentage of a mine’s production for the operating life of the asset. Sandstorm Gold is focused on acquiring
Gold Streams and royalties on mines with low production costs, significant exploration potential and strong management teams.
A royalty is a payment
to a royalty holder by a property owner or an operator of a property and is typically based on a percentage of the minerals or
other products produced or the revenues or profits generated from the property. Royalties are not typically working interests in
a property and, depending on the nature of a royalty interest and the laws applicable to it and the project, the royalty holder
is generally not responsible for, and has no obligation to contribute additional funds for any purpose, including, but not limited
to, operating or capital costs or environmental or reclamation liabilities. An NSR royalty is generally based on the value of production
or net proceeds received by an operator from a smelter or refinery. These proceeds are usually subject to deductions or charges
for transportation, insurance, smelting and refining costs as set out in the specific royalty agreement. For gold royalties, the
deductions are generally minimal. NSR’s generally provide cash flow which is free of any operating or capital costs and environmental
liabilities. A smaller percentage NSR in a project can effectively equate to the economic value of a larger percentage profit or
working interest in the same project.
Gold Streams and royalties
are an alternative to other more conventional forms of financing, including equity, convertible securities and debt financings
which can be used to finance mineral projects. Sandstorm Gold competes directly with these other sources of capital to provide
financing. Sandstorm Gold plans to grow and diversify its production profile through the acquisition of additional Gold Streams
and royalties. There is no assurance, however, that any potential acquisitions will be successfully completed.
The documents incorporated
by reference herein, including the Annual Information Form, contain further details regarding the business of Sandstorm Gold. See
“Documents Incorporated by Reference”.
Recent Developments
Purchase of Fruta del Norte Net Smelter
Returns Royalty
On January 18, 2019, the Corporation announced the purchase
of a 0.9% NSR royalty on precious metals produced from the Frute de Norte gold project in Ecuador currently under construction
by Lundin Gold Inc. The NSR royalty was acquired from private third party for U.S.$32.75 million.
Increase to Credit Facility
On December 6, 2018,
the Corporation announced that it had amended its revolving credit agreement to allow for the borrowing of up to U.S.$225 million
for general corporate purposes, including acquisitions, share buybacks and dividends.
Anticipated Extension of Normal Course
Issuer Bid
On November 15, 2018,
the Corporation announced that its board of directors approved the purchase of up to 18,300,000 Common Shares between November
15, 2018 and the end of 2019 subject to TSX approval. Under the Corporation’s existing normal course issuer bid (the “
NCIB
”),
the Corporation has the option to purchase up to 9,191,777 Common Shares. As of November 15, 2018, the Corporation had purchased
2,500,000 Common Shares, leaving approximately 6,691,777 Common Shares available for purchase under the existing NCIB. After expiry
of the Corporation’s existing NCIB on April 4, 2019, the Corporation plans to seek approval for a new NCIB from the TSX to
allow the Corporation to purchase the remaining Common Shares as well as additional Common Shares up to an aggregate of 18,300,000
Common Shares. The 18,300,000 Common Shares represents approximately 10% of the Corporation’s issued and outstanding Common
Shares as of November 15, 2018.
Hod Maden Project Technical Report
On June 26, 2018, the
Corporation filed on SEDAR the Hod Maden Report. The Hod Maden Report is a pre-feasibility study of Hod Maden. Sandstorm Gold has
a 30% interest in the Hod Maden project.
Renewal of Normal Course Issuer Bid
On March 29, 2018,
the Corporation announced that its NCIB had been renewed on the expiry of the previous normal course issuer bid on April 4, 2018.
The NCIB provides Sandstorm Gold with the option to purchase the Corporation’s Common Shares from time to time when Sandstorm
Gold’s management believe that the Common Shares are undervalued. Sandstorm Gold may purchase under the NCIB up to 9,191,777
of its Common Shares representing 5% of the Corporation’s issued and outstanding Common Shares of 183,823,556 as of March
19, 2018.
TECHNICAL INFORMATION
Santa Elena Mine, Mexico
The Santa Elena Report
was prepared for SilverCrest (now First Majestic) in accordance with NI 43-101. The following description of the Santa Elena mine
has been sourced, in part, from the Santa Elena Report and readers should consult the Santa Elena Report to obtain further particulars
regarding the Santa Elena mine. The Santa Elena Report is available for review under First Majestic’s profile on SEDAR.
Information in this
section that provides non-material updates to the information in the Santa Elena Report has been provided by First Majestic and/or
has been sourced from their press releases dated March 29, 2018, January 14, 2019 and/or the First Majestic AIF as filed by First
Majestic on SEDAR.
Certain capitalized
terms not otherwise defined under this part or in the Prospectus have the meanings ascribed to them in the Santa Elena Report.
The updated Mineral Reserves and Mineral Resources information to December 31, 2017 has been sourced from the First Majestic AIF
and First Majestic’s press release dated March 29, 2018, as filed on SEDAR.
Project Description, Location and
Access
The Santa Elena mine
is an underground (formerly open pit) mine currently producing gold and silver in the form of doré bars from a 3,000 tonne
per day CCD/Merrill Crowe (“
CCD/MC
”) processing facility, including ore from the underground operations and
reprocessing of partially leached ore stored in a stockpile pad which was previously mined by open pit and processed by heap leaching.
Commercial production for the 3,000 tonne per day mill and plant facility was declared on August 1, 2014. Underground development
has been ongoing since January 2013 with commercial production declared on October 1, 2014.
The Santa Elena mine
is located in Sonora, Mexico, approximately 150 kilometres northeast of the state capital city of Hermosillo and seven kilometres
east of the community of Banámichi. The Santa Elena mine is located on the western edge of the north trending Sierra Madre
Occidental mountain range geographically adjacent to the Sonora River Valley. Property elevations range from 800 metres above sea
level to 1,000 metres above sea level.
The Santa Elena mine
consists of sixteen contiguous mining concessions (the “
Santa Elena Concessions
”) covering approximately 57,184
hectares registered in the name of Nusantara de México, S.A. de C.V. (“
Nusantara
”), a wholly owned subsidiary
of First Majestic, which include the El Gachi Properties acquired from Santacruz Silver Mining Ltd. in March 2017.
On December 8, 2005,
Nusantara entered into an option agreement with Tungsteno de Mexico S.A. de C.V. to acquire a 100% interest in nine of the Santa
Elena Concessions through staged option payments over five years for a total cost of U.S.$4.0 million paid in cash and SilverCrest
shares. Payments were completed in August of 2009 with SilverCrest owning 100% of the Santa Elena mine with no underlying royalties.
In 2014, two option agreements were entered into with Minera Evrim, S.A. de C.V., a subsidiary of Evrim Resources Corp., to acquire
eight nearby mining concessions covering a total of 40,699 hectares, named the Ermitaño group of two concessions and the
Cumobabi group of six concessions. In December 2016, an option agreement was entered into with Compañía Minera Dolores,
S.A. de C.V., a subsidiary of Pan American Silver Corp., to acquire 5,802 hectares of mining concessions adjacent to the Santa
Elena mine. In exchange, First Majestic has agreed to incur U.S.$1.6 million in exploration costs on the property over four years,
a 2.5% NSR royalty on the related concessions, and to pay U.S.$1.4 million in cash, of which U.S$300,000 has been paid, U.S.$200,000
due in December 2018, U.S.$300,000 in December 2019 and U.S.$700,000 in December 2020, respectively.
Nusantara has maintained
all of the necessary permits for exploration and facilities at the Santa Elena mine. In 2009, the Santa Elena mine received its
Manifestacion de Impacto Ambiental (“
MIA
”) and operating permit from Secretaría de Medio Ambiente y Recursos
Naturales (“
SEMARNAT
”). Taxes based on the surface area of each concession are due in January and June of each
year at a total annual cost of approximately U.S.$51,000 and have been paid to date. A further MIA was submitted to SEMARNAT in
early January of 2013 for an amendment of the land use licence related to the underground expansion project and was approved in
May 2013. The amendment approval allows for tailings facilities that were not previously required for the open pit and heap leach
operation.
All mining concessions
in Mexico are valid for a period of 50 years. A mining concession in Mexico does not confer any ownership of surface rights. The
Santa Elena Concessions are located on Ejido (community or co-op) land, and on November 12, 2007, a lease agreement with the surface
owners was signed which allows First Majestic access and authorization to complete exploration and mine operations activities for
20 years for a maximum of 841 hectares of surface land. The annual cost per year ranges from approximately U.S.$55,000 to U.S.$160,000
dependent on the number of hectares required. Lease obligations have been met to date.
Pursuant to an agreement
with SilverCrest (now First Majestic) dated May 15, 2009, 20% of the gold production at the Santa Elena mine is forward sold to
the Corporation (the “
Santa Elena Gold Stream
”).
The Santa Elena mine
can be accessed year-round by paved highways 90 kilometres east from Hermosillo to Ures, then 50 kilometres north along a paved
secondary road to the community of Banámichi, then by a maintained gravel road that runs east for seven kilometres to the
mine site.
History
Although minor amounts
of historic production are evident at the Santa Elena mine, the documentation in support of this work is sparse, not detailed and
cannot be relied upon for future projections of economic viability.
Consolidated Fields
operated the Santa Elena mine from the late 19
th
century until the onset of the Mexican revolution in 1910. It is estimated
that the most extensive underground development occurred during this period. The recent commencement of open cut mining has made
the underground workings unsafe to enter. SilverCrest estimated that approximately 35,000 tonnes of the original tailings from
Consolidated Fields’ operations remain onsite. During the 1960’s, Industrias Peñoles S.A de C.V. drilled two
or three holes on the property, but no records are available for this drilling. During the early 1980’s, Tungsteno de Baviacora
(“
Tungsteno
”) mined 45,000 tonnes grading 3.5 grams per tonne of gold and 60 grams per tonne of silver from
an open cut at the Santa Elena mine.
After 2003, Tungsteno
periodically surface mined high silica/low fluorine material from the Santa Elena mine. During 2003, Tungsteno conducted an exploration
program at the Santa Elena mine consisting of 117 surface and underground samples. In late 2003, Nevada Pacific Gold Inc. completed
a brief surface and underground sampling program with the collection of 119 samples. A report was completed and provided to the
owner which was subsequently misplaced. Only the ALS-Chemex assay sheets and a rough location map were available for review. Sample
lengths are unclear. In early 2004, Fronteer Development Group (“
Fronteer
”) completed an extensive surface and
underground mapping and sampling program. A total of 145 channel samples (89 underground and 56 surfaces) were collected and analyzed
by ALS-Chemex of Hermosillo, Mexico. This data was used by SilverCrest for early exploration and target development.
SilverCrest acquired
the Santa Elena mine in December of 2005. The Santa Elena mine pit started commercial production of gold and silver in July 2011
and its Mineral Reserves were depleted in April 2015. First Majestic acquired the Santa Elena mine through its acquisition of SilverCrest
on October 1, 2015.
Geological Setting, Mineralization
and Deposit Types
Regional Geology
The Santa Elena mine
is located in northwestern Mexico where much of the geology can be attributed to the subduction and related volcanism of the Farallon
Plate beneath the North American Plate. The east-directed subduction of the Farallon Plate began approximately 200 million years
ago with the tectonic rifting of the supercontinent Pangea. The resulting northwest/southeast trending Sierra Madre Occidental
extends from the U.S-Mexican border to Guadalajara in the southeast, a distance of over 1,200 kilometres. It is proposed that subduction
of the Farallon Plate occurred at a relatively shallow angle, resulting in continental uplift across northern Mexico with accretionary
terrains developing along the western fringes. The shallow subduction is also thought to be responsible for the tectonics that
produced the Laramide orogeny. Continental arc volcanism culminated with the Laramide orogeny in the early to late Eocene. The
waning of compression coincides with east-west directed extension between late Eocene to the early Oligocene along the eastern
Sierra Madre Occidental flank and is considered to be the first formation stage of the Basin and Range province. By early to mid-Miocene,
extension migrated west into Northern Sonora and along the western flank of the Sierra Madre Occidental resulting in north/northwest
striking normal faults. This extensional regime caused major deformation across the Sierra Madre Occidental resulting in exhumation
of pre-Cambrian basement rocks, especially in the Northern Sierra Madre Occidental. Northwest trending shear and fault zones appear
to be an important control on mineralization in the Sonora region. Mineralizing fluids may have been sourced from Cenozoic intrusions.
The structural separation along the faults formed conduits for mineral bearing solutions. The heat source for the mineralizing
fluids was likely from the plutonic rocks that commonly outcrop in Sonora. Many significant porphyry deposits of the Sierra Madre
Occidental occur in the Lower Volcanics and are correlated with the various Middle Jurassic through to Tertiary aged intrusions.
These include Cananea, Nacozari and La Caridad. In Sonora, emplacement of these systems has been influenced by the early Eocene
east-west and east/northeast – west/southwest directed extension. The Santa Elena vein has a similar orientation to this
extensional trend. The silicic volcanism is thought to be related to fractional crystallization of mantle sourced basalts from
subduction. The five main igneous deposits of the Sierra Madre Occidental are: (a) Plutonic/volcanic rocks: Late Cretaceous-Paleocene;
(b) Andesite and lesser Dacite-Rhyolite: Eocene (Lower Volcanic Complex); (c) Silicic ignimbrites: Early Oligocene & Miocene
(Upper Volcanic Complex); (d) Basaltic-andesitic flows: late stage of and after ignimbrites pulses; and (e) repeat and episodic
volcanic events related to rifting of the Gulf of California (alkaline basalt and ignimbrite) emplaced to western flanks: Late
Miocene Pliocene and Quaternary. To the west of the Sierra Madre Occidental are the parallel ranges and valleys that show structural
similarities to the extensional tectonic regimes of the Basin and Ranges Province to the east. Elevations in the west are lower
than the eastern Provinces, with transition to the Coastal plains and Gulf of California.
Local and Property Geology
The Santa Elena mine
property is located at the northwestern extent of the Sierra Madre Occidental. The primary rock types observed on the Santa Elena
mine are the tertiary andesite and rhyolite flows. These units have been uplifted and strike north-south with a dip of 10 degrees
to 45 degrees east/northeast. The volcanic units in the immediate area of the Santa Elena mine deposit exhibit propylitic to silicic
alteration. Within the main mineralized structure, widespread argillic alteration and silicification proximal to quartz veining
is present. Within the andesite beds, chloritic alteration increases away from the mineralized zone. The main mineralized zone
is hosted within an east-west tending structure cross-cutting the volcanic units. The structure hosts an epithermal quartz calcite
vein that has been mapped for approximately 1.2 kilometres in length with a width from one metre to 35 metres averaging approximately
15 metres. The structure dips from 40 degrees to 60 degrees to the south and has been drill-tested to a down-dip depth of approximately
600 metres below surface. Splaying and cross-cutting northwest trending structures appear to influence mineralization at intersections
with the main mineralized zone and along a northwest-southeast trending the footwall of the vein. Andesite and granodiorite dikes
have been identified at the Santa Elena mine deposit. The heat source for mineralization is unknown but an intrusive at depth is
postulated. The main structure is infilled with quartz veining, quartz veinlets and stockwork, banded quartz, vuggy quartz and
black calcite. Breccias are found locally at areas of fault intersections. Adularia has been identified in a few hand-specimens.
Iron oxides including limonite, jarosite, goethite and hematite are associated with mineralization. Results of induced polarization,
resistivity and magnetometer surveys by Pacific Geophysical Ltd. in 2007 showed that the main mineralized zone is a resistivity
high (silica) and induced polarization low (minor sulphides) which can be traced for approximately 1.2 kilometres along strike
of the zone.
Interpretation from
surface, open put and underground mapping and drillhole intercepts has shown that there are eight major faults directly related
to the Santa Elena main mineralized zone.
Mineralization
Mineralization occurs
as a series of replacement veins, stockworks and hydrothermal breccias typical of other high level low-sulphidation epithermal
deposits found in the Sierra Madre. These deposits form in predominantly felsic sub-aerial volcanic complexes in extensional and
strike-slip structural regimes. Samples previously collected by various parties including SilverCrest show a geochemical signature
of gold, silver, antimony, lead, zinc, barium, calcium and manganese which is consistent with a high calcium, high level, low-sulphidation
system. The mineralization is the result of ascending structurally controlled low-sulphidation silica-rich fluids into a near-surface
environment. Mineral deposition takes place as the fluids undergo cooling by fluid mixing, boiling and decompression. Brecciation
of the mineralized zone appears to be due to explosive venting from an assumed intrusive at depth followed by deposition of the
mineralization by ascending fluids.
The structure consists
of multiple banded quartz veins and stockwork with associated adularia, fluorite, calcite and minor sulphides. Bonanza ore shoots
(greater than 500 grams per tonne of silver and 30 grams per tonne of gold) appear to be locally present but require more definition
to determine their full extent. Metal zonation appears to exist with higher grades and thicker mineralized widths near the epithermal
boiling zone, one of which daylights in the open pit area. A trend of higher grades and thicker veining is apparent with a plunge
of approximately 25 degrees to the east. Drillhole SE-12-74 intersected the vein at approximately 500 vertical metres depth with
an average uncapped grade of 1.56 grams per tonne gold and 133 grams per tonne silver over seven metres (not calculated as true
width) along this plunging trend from the open pit operation. Zonation also appears to correspond to northwest-trending cross-cutting
structures that intersect the main zone and form high grade shoots. Vertical zonation shows gold content consistent with depth
and silver content increasing. At the surface, the silver to gold ratio is 20:1. At 500 metres below surface, the ratio is approximately
100:1. Minor sulphides have been observed in a few locations within the mineralized zone. The andesite in the hanging-wall shows
disseminated pyrite averaging 5%. Calcite is found in close proximity to pyrite and averages about the same. Some select locations
in the hanging-wall show greater than 30% of finely disseminated pyrite spatially associated with greater than 30% disseminated
and veinlet calcite. Hydrothermal breccias exist in the hanging-wall andesites proximal to the Main Zone with drillholes intercepting
up to 200 metres of breccia with a pyrite/calcite matrix.
Alteration within the
deposit is widespread and pervasive, with the most significant being silicification, kaolinization, and chloritization. Kaolin
and alunite have formed primarily along structures and contacts, which are deeply weathered and oxidized. Limonite within the oxide
zone consists of a brick-red colour after pyrite, brown goethite and local yellow jarosite. Manganese occurs locally as pyrolusite
and minor psilomelane near the surface. Gangue minerals consist of quartz, calcite, adularia, chlorite and fluorite. Analyses shows
calcium content of up to 15%.
Exploration
From 2006 to 2015,
SilverCrest completed several extensive exploration programs at Santa Elena. The 2013-2014 exploration programs included surface
mapping and channel sampling, underground mapping, underground channel sampling and core drilling. The Exploration Department at
the Santa Elena mine completed a more detailed geological map of the open pit, compiling all geological and structural information
defining a revised surface exposure of main geological units and structural setting. An underground mapping and sampling program
has been ongoing since 2013 at Santa Elena and includes the underground developed areas. The majority of the sampling and mapping
has been done in the exploration cross-cuts and in short delineation core drilling.
First Majestic has
carried out exploration at Santa Elena between October 2015 and December 2017. These exploration activities include geologic mapping,
alteration mapping with the aid of the Terraspec ASD
®
(Analytical Spectral Device), geochemistry and diamond drilling.
Drilling
SilverCrest completed
four drill programs from early 2006 through 2011. In 2012-2013, SilverCrest targeted delineation of shallow, below-pit mineralization
and deep mineralization, mostly trending to the east, with additional drilling and the first underground drilling program to take
place at Santa Elena in fall 2013. This drilling focused on delineating and extending the areas along trend and down-dip of the
main mineralized zone. Other drilling was located off strike to explore for near parallel mineralization. A total of 20 drillholes
were collared using reverse circulation (“
RC
”) to expedite hanging wall drilling, then finished with diamond
core from approximately 40-50 metres before the vein target depth through to the barren footwall. This practice was discontinued
due to significant deviation in the pre-collared holes. A total of 21 diamond drill (“
DD
”) holes (1,591 metres)
were drilled in the underground 2013 program. A total of 218 holes (72,965 metres including RC with DD tails) were drilled during
the 2012-13 program, including holes drilled from within the pit and the 2013 underground program.
During 2014, SilverCrest
targeted infill drilling in the underground area for the initial stopes. This drilling resulted in approximate spacing of about
25 metres in the initial stope area, which was previously around 50 metres, allowing SilverCrest to create a more defined model
and giving a better idea of grade distribution. A series of additional deep drillholes to both the east and the west of the main
mineralized zone were done to focus on the delineation and extension of the ore body to depth and also some drillholes targeting
the extension of the El Cholugo and Tortuga vein were completed in 2014. To the date of the Santa Elena Report, down hole surveys
were completed on the majority of the drillholes including all 2014 drillholes both at surface and underground drilling. For the
2014 drilling, surveys were taken at an interval of approximately 30 metres, an initial reading at 10 metres was first taken to
ensure no deviation had occurred during set up for the drill rig.
During 2015, SilverCrest
continued infill and delineation drilling in the underground area for 15 additional stopes. This drilling resulted in approximate
spacing of about 25 metres in those stope areas. This drilling campaign included 66 drillholes, for approximately 2,110 metres.
All drilling in the
2012-2015 campaigns was conducted by external contractors.
Also in 2012, 10 trenches
and subsequent bulk composite samples were excavated using an excavator to an average depth of five metres on the leach pad. Sampling
was to test spent ore metallurgy for estimated recovery rates through the milling process.
Since the acquisition
of Santa Elena, First Majestic has drilled 33,971 metres in 302 holes. In 2017 First Majestic drilled 21,207 metres in 243 holes.
Almost 50% of the drilling was conducted on the San Judas-Santa Ana and Ermitaño West prospects. Additionally, First Majestic
acquired a high- resolution SPOT satellite image covering approximately 175,000 hectares to carry out structural interpretations.
Alteration mapping with the support of the Terraspec ASD
®
spectrometer has also been completed in the Santa Elena
Norte and Ermitaño West prospects.
Sampling and Analysis
The 2006 sampling by
SilverCrest consisted of continuous surface channel sampling along exposed road cuts and outcrops. The underground verification
channel sampling program consisted of semi-continuous horizontal sampling of identified Fronteer sample locations. The samples
were collected over selected intervals, placed in plastic bags and periodically shipped to ALS-Chemex in Hermosillo Mexico for
preparation, with sample pulps shipped to and analysed by ALS-Chemex, North Vancouver, BC. The 2006, 2007 and 2008 core drilling
procedure included the collection and labelling of the drill core. After logging and identifying the mineralized zone, core was
selected for splitting and sampling. The 2008 RC drilling program consisted of collecting chips and cataloguing. The 2012 and 2013
drilling program included procedures for the collection and labelling of the drill core. A total of 15 drillholes were first drilled
by RC methods and finished with diamond core tails with a further four drilled purely as RC of HQ size drill core (63.5 millimetres
diameter). Although RC cuttings were not retained, a number of samples from the hanging wall were sampled.
The drill core was
recovered and stored in vinyl boxes. Drill runs were identified in the field by drillers using markers in the core boxes at three
metre intervals. These intervals were validated by SilverCrest geologists. Recovered drill core was boxed by the drillers on-site.
Core is currently stored on-site for future viewing and reference. Core logging procedures included review of the core quality
and recording of recovery, lithological, geotechnical and mineralogical data within standardized company logging forms. After characterizing
the mineralization, SilverCrest geologists marked the start and end of each interval for sampling. The drill core sample lengths
range from 0.11 to 36.7 metres (the latter was checked in supplied drill logs as being correct) and mode of approximately two metres.
Not all drillholes were entirely sampled. The average sample length used in the 2013 resource is 1.74 metres.
Sample intervals were
recorded on the core box with sample tags. The intervals were marked on the drill core which was cut in half by a SilverCrest technician
using a diamond saw blade. Half of the core was sealed in a sample bag with the corresponding sample tag. The other half of the
core sample was returned to the core box for company record and future viewing. Sample numbers, intervals, and descriptions were
recorded on the standardized drill logs. SilverCrest inserted certified reference materials (“
CRMs
”), blanks
and duplicates samples at regular intervals into the sampling stream. In addition, internal laboratory quality assurance/quality
control (“
QA/QC
”) procedures were followed.
The 2013-2014 drilling
program included procedures for the collection and labelling of the drill core. The entire core was checked to make sure it is
placed and oriented well. The core boxes were marked with the start and end of each box run. While doing this, the geologists looked
over the core to have a general idea of the geology and mineralization before starting their description. The core was photographed
and logged in detail. The samples were measured based on the above sample requirements and included the percent recovery within
the drill run. There were marker tags put in at the start of each sample. If there was a sample that has no sampling to be done
after because of waste rock then a marker was put in to indicate the end of the sample for the core cutter. The core was then cut
with an electrical diamond saw into halves. The uncut half of the core was carefully placed back into the correct location in the
box. After cutting the interval, samples were placed in a bag marked with the sample number, hole name and project name. The sample
identification tag was then placed in the bag and the bag was tied. For standards, CRMs contain known metal concentrations (grade
and variability). They are used to assess analytical accuracy and to detect biases by comparing the assay results against the expected
grade of the standard. A reference standard from the source deposit and processed in CDN Laboratory. Using those results, materials
were measured out on a scale and put into envelopes containing 100 grams. Lab sheets were filled out and the samples were delivered
to the lab. Rejects and pulps were picked up directly from the lab as soon as the assay was completed and stored in the core storage
in Santa Elena. Samples collected, that are to be used for resource or reserve evaluation, should contain a minimum of one kilogram
of sampled material when appropriate. Exceptions may include narrow widths sampled in outcrop or core intervals where collecting
a one-kilogram sample is impractical. However, in these cases the sample must be representative of the total material being assessed.
Four different sample
types have been taken to date at the underground of the Santa Elena mine: (i) infill drill core samples, (ii) channel (chip) samples,
(iii) muck samples, and (iv) long-hole drilling samples:
|
(i)
|
Infill Drill Core Samples
|
Infill drill core samples
consist of the 2015 underground infill and delineation drilling program, comprising of 66 drillholes of NQ drill core (47.5 millimetres
diameter). Sampling protocols included procedures for the collection and labelling of the drill core. After the drill core was
recovered, it was stored in vinyl boxes, each of which contains approximately 2.25 metres of core. Drill runs were identified in
the field by drillers using markers in the core boxes at three-metre intervals. These intervals were validated by SilverCrest geologists.
Recovered drill core was boxed by the drillers on-site. The core boxes were collected and delivered twice daily to the on-site
core logging facility where the core was logged and sampled by SilverCrest technical staff. Core is currently stored onsite for
future viewing and reference. Core logging procedures included review of the core quality and recording of recovery, lithological,
geotechnical and mineralogical data within standardized company logging forms. After characterizing the mineralization, SilverCrest
geologists marked the start and end of each interval for sampling. The drill core sample lengths range from 0.45 to 2.65 metres
and mode of approximately 1.5 metres. The drill core is sampled in the entire mineralized zone. A total of 1,124 samples were collected.
The 2015 drilling program
included procedures for the collection and labelling of the drill core. The entire core was checked to make sure it was placed
and oriented well. The core boxes were marked with the start and end of each box run. While doing this the geologists looked over
the core to have a general idea of the geology and mineralization before starting their description. The core was photographed
and logged in detail. The samples were measured based on the above sample requirements and included the percent recovery within
the drill run. There were marker tags put in at the start of each sample. If there was a sample that had no sampling to be done
after because of waste rock then a marker was put in to indicate the end of the sample for the core cutter. The core was then cut
with an electrical diamond saw into halves. The uncut half of the core was carefully placed back into the correct location in the
box. After cutting the interval, samples were placed in a bag marked with the sample number, hole name and project name. The sample
identification tag was then placed in the bag and the bag was tied.
For standards, CRMs
contain known metal concentrations (grade and variability). They are used to assess analytical accuracy and to detect biases by
comparing the assay results against the expected grade of the standard. SilverCrest created a reference standard from the source
deposit processed in CDN Laboratory. Using those results, materials were measured out on a scale and put into envelopes containing
100 grams. Lab sheets were filled out and the samples were delivered to the lab. Rejects and pulps were picked up directly from
the lab as soon as the assay was completed and were stored in the core storage in Santa Elena. Samples must be representative of
the total material being assessed.
Core and surface chip
samples collected during 2017 were analyzed in First Majestic´s Central Lab and SGS Lab in Durango. Most samples for resource
update and resource estimation were analyzed at SGS. Underground chip samples were analyzed at Santa Elena’s mine lab.
The assay QA/QC program
currently followed at Santa Elena consists of the following quality control samples, which represent an insertion rate of 20% of
the original samples: three reference standard materials, coarse and pulp blanks, field duplicates, coarse and pulp duplicates
and pulp checks that are sent to a commercial certified laboratory. Quality assurance consists of performing basic statistics for
assays of the quality controls and doing visual inspection on correlation plots prepared with the assay data of the quality controls.
|
(ii)
|
Channel (Chip) Samples
|
Channel samples (chip
samples) consist of:
|
·
|
Face Channel Samples
, where: (a) every round of a new development face is sampled, for that
purpose the geologist mark the channel to be taken to the geology helpers; (b) this mark is done around 1.5 metres from the floor
elevation, from the footwall to the hanging wall – the channel is divided according the lithology or features of the face,
not taking samples greater than 1.5 metres; (c) the sampler takes the samples based on the marked provided by the geologist using
a chisel and hammer; and (d) on every face the geologist marks a composite line that is for QA/QC duplicates. A blank sample is
introduced every face, usually after the highest grade are identified by the geologist.
|
|
·
|
Back Sample
, where: (a) channels are marked by the geologist every 10 metres along the back
to be sampled; (b) from the footwall to the hanging wall – the channel is divided according the lithology or features of
the back, not taking samples greater than 1.5 metres; and (c) the sampler arrives to the area and takes the samples based on the
mark provided by the geologist – these samples are taken on the lifter (tele handler), using a chisel and hammer.
|
|
·
|
Exploration Crosscuts Sample
, where: (a) this mark is done around 1.5 metres from the floor
elevation, from the footwall to the hanging wall – the channel is divided according the lithology or features of the face,
not taking samples greater than 1.5 metres, marks are done in both walls of the cross-cut; and (b) the sampler arrives to the face
and takes the samples based on the mark provided by the geologist using a chisel and hammer.
|
To recover the sample,
the crew use a plastic canvas that is cleaned after every sample is collected. All such samples have an identification number that
help recognize the precedence and assay from the lab.
The procedure followed
in respect of the much samples is to have all trucks that are sent from underground as ore (from stopes, slashes, development)
dumped in the stock piles of the primary crusher and sampled. Every morning and afternoon the samplers arrive to site and wash
the muck; from every muck pile, a 75 centimetre distance grid is marked and a sample is taken in all of the intersections of that
grid. The sample has an identification number that help recognize the precedence and assay from the lab. QA/QC control consists
of rejects resampled from the highest grade samples.
|
(iv)
|
Long-Hole Drilling Samples
|
The objective of the
long-hole drilling sample method is to sample all the holes that are going to be drilled in that shift. The geologist and the operations
team communicate as to where drilling will be done and samples of the cuts of the drillhole are taken every two rods (approx. three
metres). There are as many bags as the length of the hole, with each bag having the name of the hole that is being drilled. The
bags are then analyzed by the geologist, to choose one or two representative samples using a splitter. The samples have an identification
number that help recognize the precedence and assay from the lab.
For the 2012-2013 sampling,
two analytical laboratories were used for sample analyses: Nusantara (“
Nusantara Lab
”), an on-site grade control
laboratory for Santa Elena operations; and ALS-Chemex. Nusantara Lab either prepared and analysed samples, or prepared and transported
samples to ALS-Chemex in Chihuahua or Hermosillo for further preparation before being sent to ALS-Chemex in Vancouver for analyses.
For the 2013-2014 sampling, three analytical laboratories were used for sample analyses: Nusantara Lab, ALS-Chemex and Inspectorate
Mining and Metals (“
Inspectorate
”). Nusantara Lab either prepared and analysed samples, or prepared and transported
samples to ALS-Chemex or Inspectorate in Hermosillo for further preparation before being sent to ALS-Chemex or Inspectorate in
Vancouver for analyses.
For the leach pad material
sampling, preparation and analyses for 2012 to 2013, all sampling was carried out by SilverCrest’s geologists and sampling
protocols adopted the following procedures: (a) plastic bags were placed in a tray in the vertical outlet of the cyclone and into
a container to avoid loss of material; (b) full interval was sampled and samples were taken at multiple orders according to the
depth of the hole – for holes with a length of 10 and 20 metres, samples were taken every two metres – for holes with
length of 15 metres, samples were collected every three metres and only one five metre sample was collected for holes with a length
of five metres; (c) all bags were labelled with the corresponding depth; and (d) the samples were delivered to the Nusantara Lab
for splitting to pulverization and additional splitting to generate aliquot for analyses. All samples were handled by geologists
at the Santa Elena mine site. Samples were sent to the Nusantara Lab for analyses. Analytical method for gold included fire assay
finishing in AA as well as gravimetric analyses for comparison purposes and for silver an Aqua Regia digestion finishing in AA.
Blanks and CRM were inserted by exploration personnel prior to the sampling preparation at the Santa Elena mine lab to carry out
a QA/QC protocol in the preparation and analyses of the samples collected by the drilling program on the pad. The results did not
indicate deviations from the blanks and CRM assay values.
For the 2015 infill
and delineation sampling, Nusantara Lab, the on-site grade control laboratory for Santa Elena operations was used.
Data Verification and Security of
Samples
Historical data prior
to the 2006 SilverCrest drilling campaign is not included in the current geological database.
During April 2006,
Scott Wilson Roscoe Postle Associates (“
SWRPA
”) collected select samples for verification, including an underground
continuous channel sample and quarter splits of drill core and sent to ALS-Chemex in Hermosillo with a regular shipment of core
samples. Overall, the grade comparisons are considered to be within acceptable ranges.
In May 2006, SilverCrest
collected 15 underground channel samples to verify the sampling results of Fronteer samples. Although there was variation in the
data, SWRPA considered it acceptable at this stage of property development to use the Fronteer data in the resource estimate. Gravimetric
silver grades were consistently higher compared to both the Fronteer and the SilverCrest silver fire with AA finish results. The
result lends support to the higher values. The fire assay with AA results was used in the resource estimate as they were more similar
to the Fronteer results which were also used.
In addition to the
underground sampling by SilverCrest, SilverCrest completed silver geochemical analyses on 289 surface samples for fire assay AA
finish and fire assay gravimetric analyses. Results show an overall 20.3% increase in silver grade using silver gravimetric assays.
AA silver results were used in the resource estimation and are considered conservative for grade estimation. For QA/QC, duplicate
analyses on 16 of 298 samples were completed at ACME Laboratories in Vancouver on ALS-Chemex pulps from core sampling and preparation.
Although the ACME results have a higher detection limit, the limited results on the duplicate pulps show consistent correlation
of grades between laboratories. During the 2008 drilling, approximately every 20th sample was duplicated in a different laboratory
for QA/QC purposes. The comparison for 2008 drill sample results show average gold and silver results to be similar and within
acceptable limits for QA/QC. The authors of the Santa Elena Report are of the opinion that the data meet accepted industry standards
and are suitable for use in estimating resources.
Insertion of CRMs at
regular intervals was completed by SilverCrest staff during the 2013-2014 Santa Elena mine drill program. SilverCrest inserted
114 blank samples in a random fashion and near to expected high grade samples during the 2013-2014 drilling program, each blank
was labelled “Blank” or “Blanco” in the drillhole data base.
First Majestic’s
internal qualified person has reviewed the data verification methods at the Santa Elena mine and believes that the methods meet
an industry standard of practice and are sufficient to support estimation of Mineral Resources and Mineral Reserves.
Mineral Processing and Metallurgical
Testing
There has been varied
metallurgical test work done on the Santa Elena mine over the last thirty years. More recently, metallurgical test work was carried
out by Inspectorate in their Richmond, BC facility on samples from Santa Elena. Inspectorate also generated slurry samples for
testing at Pocock Industrial in Salt Lake City for thickening and filtration characterization. Additional test work was carried
out in Sonora at the University of Sonora.
As detailed in the
Santa Elena Report, extensive metallurgical test work including ongoing operations data show that all declared Mineral Reserves
are amenable to conventional leaching by standard CCD milling with a Merrill Crowe recovery system for doré bar production.
Metallurgical Operational Results up
to December 31, 2017
The Santa Elena heap
leach operation was completed in mid-2014 with the transition to the new CCD/MC processing facility. As of December 31, 2017, 1.74
million tonnes of leach pad material remain and has been fully or partial leached with overall recovery rates of 60% gold and 30%
silver. The leach pad material ore is currently being reprocessed through the new processing facility. No crushing is required
for this ore with direct feed to a reclaim stockpile area where it is mixed with crushed underground ore. The 3,000 tonnes per
day conventional CCD/MC processing facility was commissioned between May to August 2014 and commercial production was declared
on August 1, 2014.
For 2017, a total of
930,000 tonnes of ore with average grades of 1.73 grams per tonne gold and 86 grams per tonne silver were processed through the
new facility. The overall blend (mix) of heap leach spent ore (“
pad ore
”) and underground ore was approximately
58%/42%. A total of 2.28 million ounces of silver and 49,211 ounces of gold were produced in 2017.
Updated Mineral Resource and Mineral
Reserve Estimates
The update to the Mineral
Reserves and Mineral Resources (underground and leach pad) for the Santa Elena mine are shown in the table below. Only Indicated
Mineral Resources were used to define Mineral Reserves in the updated mine plan.
On March 29, 2018,
First Majestic announced their updated Mineral Reserve and Mineral Resource estimates to December 31, 2017 for the Santa Elena
mine. These details are also contained in the First Majestic AIF for the year ended December 31, 2017 as filed by First Majestic
on SEDAR.
The following table
sets forth the estimated updated Mineral Reserves and Mineral Resources for the Santa Elena mine (gold only, excludes silver grades
for Sandstorm Gold reporting purposes) sources from the internal estimates prepared by First Majestic under supervision of its
internal QPs as of December 31, 2017:
Classification
|
|
Tonnes
(000s)
|
|
|
Gold
Grade
(grams
per tonne)
|
|
|
Contained Gold
(ounces)
|
|
RESERVES:
|
|
|
|
|
|
|
|
|
|
|
|
|
Probable (underground) – sulphides
|
|
|
247
|
|
|
|
2.96
|
|
|
|
23,500
|
|
Probable (underground) – sulphides
|
|
|
3,206
|
|
|
|
1.39
|
|
|
|
143,700
|
|
Probable (pad) – oxides
|
|
|
1,736
|
|
|
|
0.87
|
|
|
|
48,600
|
|
TOTAL RESERVES:
|
|
|
5,189
|
|
|
|
1.29
|
|
|
|
215,800
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
RESOURCES:
|
|
|
|
|
|
|
|
|
|
|
|
|
Measures (underground) – sulphides
|
|
|
560
|
|
|
|
2.65
|
|
|
|
47,700
|
|
Indicated (underground) – sulphides
|
|
|
2,580
|
|
|
|
1.77
|
|
|
|
147,100
|
|
Indicated (pad) – oxides
|
|
|
1,496
|
|
|
|
0.97
|
|
|
|
46,500
|
|
TOTAL RESOURCES:
|
|
|
4,635
|
|
|
|
1.62
|
|
|
|
241,300
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
INFERRED
(underground) – sulphides
|
|
|
1,063
|
|
|
|
1.44
|
|
|
|
49,400
|
|
|
(1)
|
All Mineral Resources and Mineral Reserves conform to NI 43-101 and CIM definitions for Mineral
Resources and Mineral Reserves.
|
|
(2)
|
Underground Mineral Reserves are based on a cut-off grade of 135 grams per tonne silver equivalent
for extraction by long-hole and cut and fill in the main vein, and 130 grams per tonne silver equivalent for extraction by cut
and fill in narrow veins, and these are based on actual and budgeted operating and sustaining costs and metallurgical recoveries.
|
|
(3)
|
Metal prices considered for Mineral Reserves were U.S.$1,300 per ounce gold, the effect of the
Santa Elena Gold Stream has also been considered.
|
|
(4)
|
For the Mineral Reserves estimates, dilution for underground mining includes consideration for
internal dilution for designed stopes and an additional 8% dilution due to material handling. Mining loss is estimated at 6%.
|
|
(5)
|
Underground Mineral Resources are based on a cut-off grade of 125 grams per tonne silver equivalent
for extraction by long-hole and cut and fill in the main vein and 120 grams per tonne silver equivalent for extraction by cut and
fill in narrow veins, and these are based on actual and budgeted operating and sustaining costs and metallurgical recoveries.
|
|
(6)
|
Cut-off grades considered for leach pad ore was 75 grams per tonne silver equivalent (resources)
and 85 grams per tonne silver equivalent (reserves) and are based on actual and budgeted operating and sustaining costs and metallurgical
recoveries.
|
|
(7)
|
Metal prices considered for Mineral Resources were U.S.$1,450 per ounce gold, the effect of the
Santa Elena Gold Stream has also been considered.
|
|
(8)
|
Metallurgical recoveries used were 95% for gold.
|
|
(9)
|
Metal payable used was 99.9% for gold.
|
|
(10)
|
Totals may not add up due to rounding.
|
|
(11)
|
Silver equivalent grade is estimated as: Silver equivalent = silver grade + (gold grade x gold
recovery x gold payable x gold price) / (silver recovery x silver payable x silver price).
|
|
(12)
|
Measured and Indicated Mineral Resources are reported inclusive of Mineral Reserves.
|
|
(13)
|
Ramon Mendoza Reyes, P. Eng., Vice President Technical Services for First Majestic, a QP under
NI 43-101, has reviewed and approved the Mineral Reserves and Mineral Resources set forth above.
|
With the update to
Mineral Reserves, the Santa Elena mine life of mine is scheduled to continue for five years at nominal milling rate of 2,750 tonnes
per day with reduced throughput in the last year upon depletion of the leach pad reserves. The mine schedule is based on mining
long-hole stopes early in the mine life at lower costs with small reserve being mined using cut and fill stopes towards the end
of the mine schedule.
Mining Operations, Exploration, Development
and Production
Initially, the Santa
Elena mine open pit heap leach mine was constructed in late 2009 and 2010 and was operational from 2010 to 2015. During 2013 and
2014, the open pit heap leach was transitioned into an underground, milling and CCD/MC 3,000 tonne per day processing facility.
As of December 31, 2015, the underground mine was fully operational and producing steadily. The Santa Elena mine ore body varies
in dip and thickness along strike and at depth. As a result, two well established underground mining methods have been selected
for ore extraction.
In general, conventional
mechanized mining methods have been selected. As of December 31, 2015, First Majestic has undertaken ore development, production
drilling, blasting and loading operating its own equipment, and is using a contractor for the waste rock and ore haulage to surface.
A contractor is retained to carry out the main ramp development. Approximately 89% of stoping will be by long-hole method and 11%
by cut and fill methods. Most long-hole stopes are produced early in the mine schedule. Average stope width is 10 metres.
Mining of the pad ore
is completed by loader and conveyor to transport material to the plant.
As of December 31,
2017, the main ramp has been developed to approximately the 425 metre elevation with development drifts every 25 metres from the
level 700 to the 450 metre level (elevations above sea level). Underground stope production during 2017 consisted of long-hole
stoping and mechanized cut-and-fill in the main vein, and conventional cut-and-fill in the narrow veins: Alejandras and Tortuga.
Mineral Reserves from the open pit were depleted in April 2015.
In 2016, First Majestic
started the development of a second ramp called the San Salvador ramp, which was completed in April 2017. The new ramp connects
to the main vein along level 575, improving ventilation and productivity by reducing trucking bottlenecks in the underground ramps.
First Majestic’s
mining schedule estimates the tonnages to be mined from the underground and the existing pad ore to feed the process plant at a
nominal rate of 2,750 tonnes per day. The schedule is based on optimizing higher grade long-hole stopes first, with more costly
cut and fill mining in the main vein left for later in the mine life. An underground mining schedule has been developed for the
stopes in the reserve model and for development required to access the stopes throughout the life of mine plan. A 67%/33% mix (underground
to pad ore) is assumed for the life of mine plan.
Processing and Recovery Operations
The ore from underground
resources is currently processed by conventional milling and cyanide leaching technology. In addition, partially leached material
from the existing heap leach operations is blended with underground ore at a variable rate and reprocessed through the same plant.
Santa Elena ore (underground and pad) contains an estimated grade of 1.29 grams per tonne gold and 84 grams per tonne silver and
after crushing and grinding is leached in cyanide. Because of the relatively high level of silver in the ore (and hence solutions)
there are advantages and benefits to using traditional CCD and Merrill-Crowe for metal recovery rather than carbon-in-leach/carbon-in-pulp
process. The partially leached pad ore yielded recoveries of approximately 60% gold and 30% silver when crushed to 10 millimeters
and processed on the heap leach (partial leach cycle to Q2 2014). On re-leaching after grinding in the new plant, the balance of
the metals is recovered to the level expected from fresh ore from underground, at a rate of 95% for gold and 89% for silver. The
process plant has been designed to treat 3,000 tonnes per day of ore, a mixture of freshly mined material and partially leached
heap leach material, but First Majestic has found that, after increasing the retaining time in the ball mill in order to achieve
a finer particle, the metallurgical recovery of silver has increased significantly, which has resulted in a reduction of the nominal
plant feed to 2,750 tonnes per day. The plant has been designed to treat any proportion of these two types of feed.
Infrastructure, Permitting and Compliance
Activities
As of December 31,
2014, all transition projects were fully constructed, commissioned and commercial production announced. Much of the same infrastructure
facilities utilized for the open pit mine continue to be used for the new operations, including, but not limited to, access roads,
waste dumps, explosive magazines, office buildings, fuel storage facilities, power generation, primary crushing equipment, heap
leach pads and solution collection ponds.
Environmental studies
were conducted on the open pit excavation that occurred at the Santa Elena mine. An independent Closure and Mine Reclamation Plan
was created for the Santa Elena mine project in March 2010, and updated in January 2014, by Global Resource Engineering Ltd. This
initial plan incorporated study results from baseline environmental impact, water quality and geotechnical stability studies for
the original open pit, processing and waste dump. The updated plan in 2014 incorporates plans for earthworks in regards to topsoil
placement on impacted grounds, earthworks for erosion control, demolition and removal of old buildings. Consideration for mine
closure, remediation and ongoing monitoring and stewardship activities are included within the economic model for the Santa Elena
mine. First Majestic updated these estimates internally for the year-end 2017.
Capital and Operating Costs
Capital Costs
As of December 31,
2017, First Majestic estimated total sustaining capital costs during the remaining life of mine of U.S$56.69 million, including
development, delineation and infill drilling, plant and infrastructure sustaining capita, as per the table below:
Sustaining
Capital Cost, Including Exploration Drilling Expense
|
|
|
|
Mill Sustaining Capital
|
|
U.S.$
|
10.93
million
|
|
Underground waste development expenses
|
|
U.S.$
|
18.03
million
|
|
Underground equipment and infrastructure
|
|
U.S.$
|
7.29
million
|
|
Underground and surface drilling
|
|
U.S.$
|
20.44
million
|
|
TOTAL CAPITAL
COSTS:
|
|
U.S.$
|
56.69
million
|
|
Note:
All numbers have been rounded
to the nearest thousand.
Operating Costs
Operating costs for
the Santa Elena mine have been estimated for the underground mining, processing costs and general and administrative costs. First
Majestic currently estimates the life of mine plan operating costs at an average of U.S.$52.04 per tonne of ore processed based
on current and projected costs. The life of mine plan assumed an approximate 67% underground ore to 33% pad ore blend.
Mining
Method
|
|
Long-
Hole
Main
Vein
|
|
|
Cut
and Fill
Main
Vein
|
|
|
Cut
and Fill
Narrow
Veins
|
|
|
Pad
Ore Reprocess
|
|
Process Method
|
|
|
Cyanidation
|
|
|
|
Cyanidation
|
|
|
|
Cyanidation
|
|
|
|
Cyanidation
|
|
Mining Cost/tonne
(1)
|
|
U.S.$
|
32.62
|
|
|
U.S.$
|
22.69
|
|
|
U.S.$
|
30.02
|
|
|
U.S.$
|
2.50
|
|
Processing Cost/tonne
(2)
|
|
U.S.$
|
24.88
|
|
|
U.S.$
|
24.88
|
|
|
U.S.$
|
24.88
|
|
|
U.S.$
|
22.58
|
|
Indirect Cost/tonne
(3)
|
|
U.S.$
|
8.06
|
|
|
U.S.$
|
8.06
|
|
|
U.S.$
|
8.06
|
|
|
U.S.$
|
8.06
|
|
Notes:
|
(1)
|
Long-hole stoping in main vein represent 50% of the mine throughput, cut and fill stoping in main
vein represent 37% of the mine throughput and cut and fill stoping in narrow veins represent 13% of the mine throughput.
|
|
(2)
|
Processing includes crushing, milling, site refining and dry stack tailings disposal.
|
|
(3)
|
Estimated based on current operations and may vary on an annual basis.
|
Economic Analysis
According to the
Santa Elena Report, the Base Case economic analyses used a range of metal prices per ounce for gold and silver. For gold prices,
the range is defined as U.S.$1,250 (2015), U.S.$1,275 (2016) and U.S.$1,300 (2017 – 2022) and for silver prices the range
is defined as U.S.$18 (2015), U.S.$19 (2016), U.S.$20 (2017) and U.S.$21 (2018 – 2022). On this basis, the following economic
highlights for a continued eight year mine life beginning January 2015 are:
|
·
|
Total operating revenue of U.S.$555 million from estimated sales of 12.6 million ounces of silver
and 270,700 ounces of gold.
|
|
·
|
Total operating costs of U.S.$349 million.
|
|
·
|
Estimated cash operating costs averaging U.S.$11.59 per silver equivalent ounce (gold:silver average
ratio of 64.5:1 based on sold ounces for the life of mine plan.
|
|
·
|
Total sustaining capital costs of U.S.$31 million including the life of mine plan underground drilling
programs and 2015 surface exploration expenditures.
|
|
·
|
Total pre-tax undiscounted cash flow of U.S.$163 million including estimated closure cost deductions
of U.S.$6 million.
|
|
·
|
Pre-tax Base Case pre-tax NPV (5%) of U.S.$144 million.
|
|
·
|
Post-tax Base Case post-tax NPV (5%) of U.S.$119 million.
|
Metal price sensitivities
were completed including spot price as U.S.$1,193/ounce gold and U.S.$16.16/ounce silver (representing spot price in December 2014)
which showed a pre-tax NPV (DCF @ 5%) of U.S.$84.3 million. The economic analyses consider SilverCrest delivering 54,133 ounces
of gold to Sandstorm Gold at an average price of U.S.$412 per ounce (U.S.$350 to U.S.$450 per ounce with annual 1% inflationary
increases) under the Santa Elena Gold Stream.
Santa Elena Mine Milestones
Current activities
at the Santa Elena mine include
:
|
·
|
On January 14, 2019, First Majestic announced that, during the quarter ended December 31, 2018,
the Santa Elena mine produced 567,754 ounces of silver and 12,081 ounces of gold, for a total production of 1,587,396 silver equivalent
ounces, reflecting an 8% increase compared to the prior quarter. The mill processed a total of 221,945 tonnes, consisting of 142,534
tonnes of underground ore and 79,410 tonnes from the above ground heap leach pad. Silver and gold grades from underground ore averaged
120 grams per tonne and 2.4 grams per tonne, respectively. Silver and gold grades from the above ground heap leach pad averaged
36 grams per tonne and 0.6 grams per tonne, respectively. Silver and gold recoveries averaged 88% and 96%, respectively, during
the quarter. First Majestic’s production guidance for 2019 for Santa Elena is 2.3 to 2.6 million ounces of silver (5.2 –
5.8 million ounces of silver equivalent).
|
Hod Maden Project, Turkey
The Hod Maden Report
was prepared for Sandstorm Gold in accordance with NI 43-101. The following description of the Hod Maden project has been sourced
from the Hod Maden Report and readers should consult the Hod Maden Report to obtain further particulars regarding the Hod Maden
project. The Hod Maden Report is available for review under the Corporation’s profile on SEDAR.
Certain capitalized
terms not otherwise defined under this part or in the Prospectus have the meanings ascribed to them in the Hod Maden Report.
Project Description, Location and
Access
The Hod Maden property
is situated within the Eastern Pontides tectonic belt, which coincides with the 500 kilometre long and 50 to 75 kilometre wide
mountain chain extending along the southeastern Black Sea coastline. The Hod Maden project is located approximately 20 kilometres
south of Artvin and 130 kilometres northeast of Erzurum in northeastern Turkey near the border with Georgia. The Hod Maden project
infrastructure currently comprises an exploration camp with no mining commenced at the site.
The north-south striking
Hod Maden deposit is transected by the (locally) east-west trending Maden Creek Valley, with the valley populated by scattered
neighborhoods of residential dwellings. The village of Yukarimaden sits near the deposit, while the village of Aşağımaden
sits approximately two kilometres downstream. The total population of the Yukarimaden village is determined as 117 persons (according
to Turkish Statistical Institute records) and the village is composed of clustered neighbourhoods in different regions. These neighbourhoods
are located in the vicinity of the Hod Maden project. The population of the region is generally living in the Artvin area or in
other provinces and returning to the villages as summer residences. There are believed to be few year-round inhabitants.
The Hod Maden property
is accessible from Artvin city (20 kilometres) or from Erzurum city (130 kilometres by road via Yusufeli). The highways from Artvin
or Erzurum are asphalt up to the new main road junction along the new reservoir on the Ҫoruh River. The road leading away
from the reservoir to the working area and nearby Yukarimaden village is partly asphalt. Erzurum is the nearest city with an international
and significant domestic airport (the alternative is Trabzon).
The Hod Maden project
is well positioned to access infrastructure. Yukarimaden village lies within the Hod Maden property and has limited power, running
water, and sewage treatment facilities. Two high-tension power lines stretch across hilltops above the project area. Two concentrate
handling facilities and ports are situated on the Black Sea coast near the Hod Maden project. The closest is Hopa, approximately
120 kilometres by road from Yukarimaden. Hopa was built to handle copper concentrate from the nearby Murgul mine. The second is
Rize, which handles concentrate from the Cayeli mine, approximately 200 kilometres from the Hod Maden project.
The Hod Maden project
consists of Turkish Operating Licence 20050853 and Exploration Licences 201200321, 201201059 and 201201058 comprising a total land
area of 7,394.25 hectares. These licences are all owned by Artmin Madencilik San. Tic. A. Ş (“
Artmin
”)
(formerly known as AMG Mineral Madencilik AS, “
AMG
”), a Turkish entity that is owned 70% by Lidya Madencilik
(“
Lidya
”) and 30% by Sandstorm Gold (through Mariana Resources Limited (“
Mariana Resources
”)).
Teck Resources Limited (“
Teck
” or “
Cominco
”) previously retained a 2% NSR royalty on the
concessions, which Teck subsequently sold to a subsidiary of Sandstorm Gold in January 2016.
Mining activities in
Turkey are regulated by the Mining Law No 3213 dated June 15, 1985 (amended in 2004 by Law 5177, 2010 by Law 5995, 2015 by Law
6592, 2017 by Law 7020 and 2017 by Law 7061) (the “
Mining Law
”), together with the Mining Regulation dated September
21, 2017 (the “
Mining Regulation
”) and the Mining Waste Directive dated July 15, 2015.
The Ministry of Energy
and Natural Resources (“
MENR
”) is responsible for overseeing the mining industry. The General Directorate of
Mining Affairs, a department of MENR, grants licences and regulates mining activity. The Mining Law requires mining licences to
be given according to certain mineral groups, and the licensing procedure for each class is slightly different. A licence received
for a specific group may not provide a right to its holder for other groups. However, the Mining Law allows for multiple licences
involving different categories of minerals in the same area. The area over which a licence can be granted is limited, up to a maximum
of 2,000 hectares. There are three types of licences granted for prospecting and operating mines under Turkish law: an exploration
licence (enables the holder to carry out exploration activities in a specific area), an operating licence (enables the holder to
carry out operational activities) and an operating permit (enables the holder to operate a mine).
Licences are subject
to an application fee and an annual licence fee as per amendments in 2015 by Law 6592 (70% is from licence value and 30% is from
environment-friendly guarantee) to be determined under the Mining Law. Royalties ranging on a sliding scale from 2% to 16% dependant
on a mineral’s selling price are payable to the Turkish government annually. The amount of the royalty is increased by 30%
for mining activities in the areas that are under the ownership of the state (including forestry areas).
Licence holders can
obtain a royalty discount of 50% for certain types of mineral if the minerals are processed at the licence holders’ plant
within Turkey or if production is carried out by an underground operating method which is expected to be the case at the Hod Maden
project. There is also potential to receive incentives from the central government, however, the form and value of such will only
become apparent once the Hod Maden project gets closer to development.
The Mining Regulation
also introduced the concept of an “environment-friendly guarantee”, which is an annual guarantee payment which becomes
payable when the operating licence is issued. It is understood that 30% of the licence value (environment-friendly guarantee) will
be returned at closure, which in practice will partially reimburse the cost of closure.
The basic corporate
income tax rate levied on business profits is 20%, while dividends are subject to 15%. There is no restriction on repatriation
of profits and no import duty for new mining and processing equipment. There are no prescriptive requirements in respect of the
financial capacity of investors, but the licensing and monitoring regime outlined above aims to ensure continued investment as
a requisite to maintaining the necessary licences.
The operating licence
has annual fees and the exploration licences require minimum expenditures until the end of 2019, as listed below in order to keep
the licences active:
Operating Licence Fees for 2018
Payments (2018)
|
|
Operation Licence (20050853)
|
Licence Value (according to Mining Law)
|
|
50,193.00 Turkish Lira
|
Forestry Land Permit Fee (Road)
|
|
9,481.79 Turkish Lira
|
Forestry Land Permit Fee (30 drill sites)
|
|
49,875.76 Turkish Lira
|
Forestry Land Permit Fee (30 drill sites)
|
|
63,242.36 Turkish Lira
|
Forestry Land Permit Fee (28 drill sites)
|
|
59,965.79 Turkish Lira
|
Forestry Land Permit Fee (52 drill sites)
|
|
49,011.49 Turkish Lira
|
Minimum Expenditures
Exploration Licence No.
|
|
Licence Value (2018)
|
|
Minimum Exploration
Expenditure Requirements until 2019
|
201200321
|
|
5,018.00 Turkish Lira
|
|
343,410.00 Turkish Lira
|
201201058
|
|
5,018.00 Turkish Lira
|
|
343,410.00 Turkish Lira (up to July 2019)
|
201201059
|
|
5,018.00 Turkish Lira
|
|
343,410.00 Turkish Lira (up to July 2019)
|
Total:
|
|
15,054.00 Turkish Lira
|
|
1,030,230.00 Turkish Lira
|
History
The Hod Maden project
(“maden” means mine in Turkish, “hod” is a local plant name in Georgian), is located in an important copper
mining district. The project was formerly known as “Hot Maden”, but the name has recently been changed to Hod Maden
to reflect the true historical name of the area.
South of the provincial
capital, Artvin, lies the volcanogenic Murgul copper mine and mill complex. The high grade Cerratepe volcanogenic massive sulphide
(“
VMS
”) type deposit, also near Artvin city, was found in recent years by Cominco. Cominco’s discovery
team included Firuz Alizade who currently directs Lidya’s exploration at Hod Maden.
Mining at the Hod Maden
project may pre-date the rise of the Ottoman Empire (14
th
Century) and the keeping of historical records. The presence
of slag overburden in holes HTD-04 and HTD-05 suggests pre-Russian mining at Hod Maden. The tailings from Russian processing facilities
are located in the southern part of the Hod Maden project area. In 1886, the Hod Maden property was in the territory of Russia
and the operation of “Hot Mines” was given to a Mr. Simonides by the Russian government. Hot Mines, which are mostly
in the southern part of the current concessions, were exploited by this group from 1888 to 1904 and historical records suggest
that some 500 to 700 tons of copper per year were produced during this period. The mining method was underground narrow vein mining
reported to have used an 8% copper cut-off grade, however, these figures cannot be corroborated and cannot be relied upon. This
mining operation was closed sometime between 1904 and 1911.
In 1913, the Hod Maden
project was acquired by the Russian Hot Company. Exploration, including drilling, was carried out by this company, however, the
results are not available. The Russian Hot Company started construction of a new metallurgical plant and access road following
their exploration campaign. The Russian Hot Company's activities ended in 1923, when the Russians were expelled, and the region
returned to Turkey. Current residents of the local villages near Hod Maden recount stories that the Russians began, but did not
complete, a tunnel in the direction of the Hod Maden project discovery hole area.
The mine site was acquired
by the Mineral Research & Exploration General Directorate (“
MTA
”) in 1942. During 1942 to 1943, limited
geophysical field measurements, re-opening of the underground workings and sampling were carried by MTA. The analysis from 109
samples taken from mostly narrow-vein occurrences returned an average grade of 2.57% copper. These values are of historic interest
only and, following this work, new development was proposed but not immediately carried out.
The following is a
chronology of ownership and events at the Hod Maden project since 1943:
Mineral Research & Exploration Directorate
|
·
|
1946 – Report issued by MTA on the geology of the Hod Maden property; additional geophysics
and drilling recommended in the area of the old Russian mining in the southern part of the 8+ kilometre long anomaly.
|
|
·
|
1966 – A report, Hot Artvin lead-zinc-copper mineralization, authored by Dr.R.Ovalıoğlu
of MTA was published.
|
|
·
|
1970 – A report, Geology around Belizor Meydan (Hot) Districts, authored by Mehmet Doyuran
of MTA was published.
|
|
·
|
1974 – It appears that MTA permitted ETI Bank to complete some exploration drilling in the
south area of the Hod Maden prospect in the area of the rhyolite breccia (results not known); on basis of IP and Turam geophysics,
drilling was proposed in the northern part of Hod Maden (Lidya drilled this in 2014).
|
|
·
|
1976 – The Geological Report of Pyritic Copper-Zinc-Lead Mineralization authored by Satir
and Ererenn of MTA was published that included IP and Turam geophysical work.
|
Anglo-Tur
|
·
|
1991 – The tenements were acquired by Anglo-Tur (a subsidiary of Anglo American Corporation
Inc.).
|
|
·
|
1992 – Anglo-Tur drilled six holes, but the results and location of drilling are unknown.
|
Teck Cominco
|
·
|
Circa 2006 – Teck acquired concessions (Cominco reportedly held the property several times
since the 1990’s) through government auction covering the old Hod Maden area which included the area drilled by Lidya in
2014.
|
|
·
|
2010 – Artmin was invited by Teck to visit the property in 2010. On December 3, 2010, AMG
made the first visits to Turkey on invitation from Teck.
|
|
·
|
July 7, 2011 – Turkish government announced plans to auction 1,252 mining licences commencing
January 9, 2012 and ending May 24, 2015.
|
Artmin
|
·
|
The Hod Maden concession was held by several groups after the early 1990’s with Teck (formerly
Cominco) holding the property in 2011, when the Turkish government announced an auction for the Hot North concession, immediately
north of the Hod Maden concession. From October to December of 2011, auction properties were ranked by AMG personnel ahead of upcoming
auction.
|
|
·
|
AMG geologists visited the prospect for the first time in mid-January 2012 and chose to bid on
Hot North, Ulutas, and Halilaga East properties. The auction was held on January 31, 2012, and AMG won the bid in the first round
in accordance with Turkish mining law. Later in 2012, AMG’s parent company, Aegean Metals Group Inc. (“
AGN
”
or “
Aegean
”) became a TSX-listed company. Aegean acquired a 100% interest in Teck’s three concessions
(201200321, 201201058, 201201059) at Hod Maden in return for 1.55 million AGN shares and a minimum U.S.$300,000 of exploration
expenditures over three years (i.e by August 2015). Teck retained a 2% NSR royalty on the concessions. This acquisition united
four concessions totalling 7,394 hectares, forming the Hod Maden project, and under the control of AGN.
|
|
·
|
In mid-January 2012, AMG personnel visited all three properties and collected surface samples.
Initial samples taken returned maximum values of 4 grams per tonne gold in road cuts. No detailed sampling was carried out. The
mineralization appears extensive with the best gold-copper-zinc values at the lowest elevation in the centre of an 8+ kilometre
long, 300 metres wide, north-trending alteration zone.
|
|
·
|
AGN entered into option agreement with Lidya in June of 2014. Under the terms of the agreement,
Lidya earned a 70% interest in Hod Maden property through exploration expenditures and cash payments. Mariana Resources merged
with AGN in January 2015, and therefore held AGN’s former 30% interest in the jointly owned company.
|
|
·
|
Artmin, as a jointly owned company was formed in January 2016, upon the signing of the shareholder
agreement between Mariana Resources and private Turkish company Lidya. Lidya and Mariana Resources hold 70% and 30% interests,
respectively, in Artmin.
|
|
·
|
In July 2017, Sandstorm Gold acquired Mariana Resources and its 30% interest in the Hod Maden
project.
|
Geological Setting, Mineralization
and Deposit Types
Regional Geology
Turkey is located in
the Alpine Orogenic Belt between the Eurasian Plate in the north, and Arabian and African Plates in the south. Four main east-west
trending tectonic belts cross the country from north to south. These are the Pontides, Anatolides, Taurides and Border Folds, all
of which are the result of ongoing continental collision, subduction and sedimentation during the Mesozoic era. The Hod Maden project
is located in the northern-most Pontide Belt, within the Eastern Pontides metallogenic belt, which coincides with the 500 kilometre
long, and 50 to 75 kilometre wide mountain chain extending along the southeastern Black Sea coastline. The property lies along
an interpreted northeast trending suture zone within a late Cretaceous age, island arc volcano-sedimentary sequence. The suture
separates a terrain containing dominantly volcanogenic massive sulfide-type deposits, located to the west including Cayeli, Murgul
and Cerattepe; from a terrain containing porphyry/intrusion-related and epithermal systems (Berta, Tac-Çorak, Ardala-Salinbas)
within, and to the east of, the suture.
Project/Local Geology
The Hod Maden project
contains roughly north-south trending stratigraphy, however the general dip directions are quite variable. Three principal rock
types are present on the property.
Mineralization is hosted
within a broadly north-south striking volcanic-sedimentary sequence of mafic to locally dacitic composition, suspected to be of
early to middle Cretaceous age. Lithologies mapped in the eastern part of the Hod Maden project area principally include:
|
·
|
massive feldspar porphyritic and locally amygdaloidal units (likely comprising sub-volcanic intrusions
or thick flows) of inferred andesitic composition;
|
|
·
|
occasional columnar jointed sills of more mafic composition; and
|
|
·
|
locally quite voluminous coarse monomictic andesite porphyry clast breccias.
|
Forming a prominent
swath in the central part of the sector is a series of well-stratified locally fine fragmental quartz-bearing volcanic sediments
(epiclastics) and variably reworked tuffs, some components of which are weakly calcareous. Litho-types include volcanic siltstones,
sandstones and fine to coarse-grained immature crystal-rich pebble-cobble clast-bearing volcanic tuff-wackes. Thin blue-grey limestone
horizons are locally present. This bedded sequence persists into the northeastern part of the Hod Maden project area, giving way
up-dip to an assemblage of well-stratified purple-grey and greenish hued andesitic volcanic units forming the western edge of a
more extensive, possibly younger domain to the east of the sector, and which could be of a more sub-aerial nature.
The southeastern part
of the Hod Maden project area is underlain by a series of thick-bedded to massive feldspar porphyritic units and coarse breccias
of andesitic composition. Their precise age relationship with the more conspicuously bedded sub-aerial andesitic domain exposed
to the northeast of the sector is unclear. They could be related or alternatively comprise a distinct litho-stratigraphic unit.
Forming a prominent
feature in the southern part of the mapped area is a locally coarse quartz-phyric to commonly more aphanitic, in-part spherulitic
and strongly flow-banded felsic dome of dacitic to rhyodacitic composition with locally very well-developed auto-breccia facies.
Where unaltered, the felsic dome presents a greenish chloritic nature. Precise age relations with adjacent volcanic stratigraphy
are poorly constrained, though the dome likely intrudes the bedded dacitic volcaniclastics and more massive andesitic litho-types
to the west. Contacts with the massive, to thick bedded andesite to the southeast could also be in-part intrusive, suggesting that
if this andesitic domain is younger than the well-bedded volcanic sedimentary sequence to the west, then the dome may be younger
still.
Cutting the felsic
flow-dome are a series of north to northwest striking fine-grained to coarsely feldspar and hornblende porphyritic andesite dykes,
and more interestingly, sparse feldspar-quartz porphyry dykes. Both are overprinted by mineralization, with the feldspar-quartz
porphyry dykes providing some evidence for a related underlying porphyritic intrusion. However, more obvious discordant coarse-grained
or porphyritic intrusive phases, either as dykes or stocks, are uncommon in the area.
Locally preserved in
areas of strong pyritization are small, crudely horizontally bedded remnants of ferricrete, locally “perched” at elevations
well above present valley bottoms, attesting perhaps to rapid Neogene uplift and erosion in the region.
Mineralization
The Hod Maden project
lies on the eastern margin of an extensive domain of Cretaceous age arc-related volcanic stratigraphy reportedly of similar age
to the volcanic domain extensively exposed further north in the Artvin district and northwest towards the Black Sea coast; which
hosts several volcanogenic massive sulphide type deposits such as Cayeli. Hod Maden is structurally complex. A vast array of faults
including both low-angle and steeply dipping structures have been identified. Some faults control distribution of mineralization
and broader hydrothermal alteration.
Gold-copper mineralization
is broadly associated with a locally argillic/phyllic hydrothermal alteration corridor which incorporates the sub-vertical, north-northeast
Hod Maden fault zone (the “
Hod Maden Fault Zone
”) and extends for more than seven kilometres with a width of
up to 300 metres. Mineralization occurs in andesitic breccias and dacitic tuffaceous sediments as quartz-sulphide (pyrite-chalcopyrite)
+/- hematite / jasper breccias and locally massive sulphides, pyrite-chalcopyrite. Zinc and lead minerals occur in the zonation
away from the main gold and copper sulphide minerals.
Geological data indicates
that mineralization is most likely a polymetallic sub-volcanic hydrothermal deposit, with the key mineralization formed between
the epithermal and porphyry zones. This is similar to a high-sulphidation epithermal rather than a VMS deposit like the nearby
Cayeli.
The Hod Maden deposit
is divided into a northern “Main Zone” and the contiguous “South Zone”, with a third area of mineralization
located 500 metres further to the south at the Russian Mining area (“Russian Zone”).
Main Zone:
At least two styles
of high-grade gold-copper mineralization are evident at the Main Zone at Hod Maden:
|
(i)
|
the predominant multiphase quartz-sulfide (pyrite-chalcopyrite) +/- hematite/jasper breccia bodies;
and
|
|
(ii)
|
semi-massive to massive sulfides (pyrite-chalcopyrite).
|
Small scale mining
of narrow, high grade polymetallic veins was also undertaken in the southern portion of the Hod Maden property by Russian mining
interests prior to 1923. Ancient slags have also been intersected in alluvial material overlying the Main Zone.
Recent drilling suggests
that the two mineralization styles are related to different mineralizing events, with the semi to massive sulfide mineralization
representing an earlier mineralization event and the multiphase breccia a later epigenetic (perhaps deep epithermal?) event. The
Main Zone deposit is sub-vertical in nature, and currently has dimensions of around 400 metres in length (N-S), 50 - 70 metres
true thickness, and a down-dip extension of greater than 300 metres. Overall, the highest grade gold-copper mineralization (typically
greater than 15 grams per tonne gold but locally greater than 100 grams per tonne gold, and +2% copper) at the Hod Maden project
lies along the eastern margin of the Main Zone. This domain of very high grade mineralization is typically +15 metres thick (true
width), is remarkably continuous in both the vertical and from section to section, and currently contains about 62% of the in-situ
metal content of the Hod Maden project deposit. All mineralization intersected to date at the Hod Maden project Main Zone is sulfide;
no oxide (and only limited supergene enrichment – minor replacement of chalcopyrite by chalcocite – occurs near surface),
which is interpreted to be a direct result of the high erosion rates experienced in rugged terrains.
Hydrothermal alteration
associated with the gold-copper mineralization at the Main Zone is dominated by chlorite, with the flanking wallrocks typically
displaying argillic and phyllic alteration assemblages. At vertical depths of 450 metres or more below surface, late-stage anhydrite
brecciation of the multiphase gold-copper breccias is common and results in the dilution of pre-existing gold-copper grades. Both
the form and source of this anhydrite is unclear, with the main possibilities being that it represents a “cap” to a
deep, yet undiscovered intrusive phase, or may simply be due to fluids circulating within the Hod Maden Fault Zone. Deep drilling
will be required to better understand the nature and distribution of this anhydrite.
From a geochemical
perspective, the Hod Maden project gold-copper mineralization contains only minor concentrations of silver and trace concentrations
of deleterious elements such as arsenic, antimony, bismuth, and mercury. These characteristics will play an important role in future
development studies, as metallurgical studies completed to date have shown the amenability of Hod Maden ores to produce high quality
flotation concentrates.
South Zone:
The South Zone is hosted
dominantly in dacitic volcanic rocks and breccias, and consists of network quartz veins, veinlets, and breccia. Pyrite is the dominant
sulfide phase, with relatively minor chalcopyrite. In contrast to the Main Zone, where chlorite is the dominant alteration mineral
phase associated with gold-copper mineralization, sericite dominates in the South Zone. Both hematite and jasper also occur but
in significantly lower abundances within the South Zone. Exploration drilling will continue to evaluate the resource potential
in the South Zone and will progressively move southwards towards the area of the pre-1923 Russian mining activity. Stratabound
and disseminated style zinc-lead (sphalerite-galena) mineralization also flanks the known gold-copper mineralization to the east
and locally to the west. It is not currently known whether this style of mineralization represents a separate mineralization event
or whether it forms part of a distal metal zonation to the gold-copper system.
Russian Zone:
Very little is known
about the style of mineralization mined from the pre-1923 Russian mining area, located approximately 500 metres to the south of
the Southern Deposit, as most of the original adits and mine accesses have now collapsed. However, historic MTA records suggest
that mining was small scale and focused on narrow, high copper grade polymetallic (copper-gold-lead-zinc-silver) veins. It is perhaps
also worth noting that, topographically, the pre-1923 Russian mine area lies approximately 300 metres vertically above the Main
Zone deposit, which suggests that deeper drilling may be required to reach possible Main Zone analogues.
Deposit Types
The Hod Maden project
area is prospective for several deposit types. The Hod Maden properties are located in the Eastern Pontides metallogenic province,
a tectonic belt comprising part of a volcanic island-arc system. The province is of Jurassic through Miocene age and hosts a great
number of base metal deposits. The province extends over an area of more than 500 kilometres east-west and 50 kilometres to 75
kilometres north-south and consists of a 2,000 metres to 3,000 metres thick sequence of volcanic rocks with minor intercalations
and lenses of marine sediments which are divided into three stratigraphic cycles. The ratio of economically important base metal
deposits changes along the general strike of the province from east (copper>>lead+zinc) to west (lead+zinc>>copper).
Approximately 40 kilometres
to the northwest of the Hod Maden project, the Murgul copper-(lead-zinc) deposit is one of Turkey’s largest copper producers.
Genetically, Murgul is assigned to a sub-volcanic-hydrothermal formation related to island-arc volcanism. It has been interpreted
as a transitional type tending to porphyry copper deposit style (Murgul type). By comparison, the deposits of the Lahanos and Madenköy,
170 kilometres west of the Hod Maden project, in the western part of the metallogenic province are assigned to the Kuroko-type.
Closer to the Hod Maden project, several deposits have also been documented to be of VMS-type including Cayeli, an operating mine
and Cerattepe, a potentially viable operation. Just 25 kilometres to the north of the Hod Maden project lies the Ardala-Salinbas
prospect, which is an intrusion related system with the mineralization hosted in limestones that stratigraphically overlie the
Hod Maden project volcano-sedimentary package.
The current view of
Mariana Resources/Lidya in relation to the genetic model for Hod Maden favours a sub-volcanic hydrothermal model with the bulk
of the breccia style mineralization formed between the epithermal and porphyry levels. This is similar to the high-sulphidation
epithermal type although lacking significant concentrations of enargite and silver.
Exploration
Geophysical exploration
commenced in the early 1970’s with induced polarisation and electromagnetic surveys undertaken, which led to the drilling
of three holes into the highly prospective southern part of the Hod Maden property in 1974.
Drilling prior to 2014
has not been used in the Mineral Resource estimation; however it has been used to inform the wider geological picture.
Detailed surface mapping
and sampling at 1:25000 scale was completed in 2013, over an area of four square kilometres covering the south and central mineralised
hydrothermally altered zone. From this work the genetic model of mineralization progressed from VMS-like to epithermal-like.
In 2014 a soil geochemistry
survey, with a focus was on the central zone, was completed. This included a number of rock samples.
In 2015, Enerson Engineering
and Geophysical Explorations Company carried out a gravity survey on the operating licence area. The purpose of the study was to
delineate the border of buried mineralized rocks thought to have higher density than surrounding barren country rock. In this survey,
gravity observations were made by using Scintrex CG-5 Autograv. Gravity observations were conducted at 267 stations. Stations were
spaced 20 metres apart along eight profiles. The maps were plotted in accordance with ED1950 UTM Datum Zone 37 except where stated
otherwise. No other geophysical methods have been utilized.
Drilling
All drilling prior
to 2014 was not used in the Mineral Resource estimation and is not detailed within the Hod Maden Report.
All drilling during
the period 2014 to 2018 was carried out by an independent contractor Geoteknik Drilling company. The initial drilling used a new
track mounted wireline Hanjin D&B rig and a custom Turkish manufactured rig. The Turkish rig was swapped for another Hanjin
D&B rig in June 2015.
All holes are either
HQ or PQ in sized diamond drilling. A total of 190 holes were drilled including fifteen holes which were twinned due to problems
with core recovery near the surface. The average length of the holes is 309 metres with a maximum length of 636 metres and minimum
of 12 metres. The maximum vertical distance reached was approximately 570 metres below surface. Drilling is spaced on an approximate
45 metres x 30 metres grid, and most holes dip approximately 60 degrees, either to the west or east.
Drillholes up to hole
number HTD-007 were not down-hole surveyed. Holes HTD-008 to HTD-167A were down-hole surveyed using a Devico survey tool by Geoteknik.
Surveys were taken whilst drilling and/or at the completion of drilling from bottom up or top down. The survey interval was 40
metres, starting at 10 metres below the collar. Drillholes were initially located using GPS or differential GPS. The final collar
positions were located by a licenced surveyor. The drill core was collected and transported to the logging facilities where it
was geologically logged, photographed and cut for sampling.
Sampling, Analysis and Data Verification
Since the commencement
of drilling in 2014, Lidya has implemented QA/QC system utilising certified reference standards, blanks and field duplicate samples.
The program included:
|
·
|
submission of one standard every 20th sample;
|
|
·
|
submission of two blanks in every assay batch; and
|
|
·
|
field duplicates every 40th sample.
|
All standards and blanks
were certified and obtained from an independent third-party provider, Geostats Pty Ltd. Field duplicates consist of cutting the
remaining half core into two with the core saw, resulting in a quarter core being submitted to the laboratory as the field duplicate
and a quarter core being retained for reference.
Monitoring of standards,
blanks and laboratory duplicates was undertaken by Lidya and Mariana Resources geologists. All blank values returned values of
less than 0.1 grams per tonne gold. A small number of standards marginally fell outside the certified control limits, with the
remaining standards in that batch passing. Most of the duplicate samples returned values within 10% of the original assay.
AMC considers the QA/QC
results are satisfactory and the assay data is suitable for Mineral Resource estimation and reporting.
Two certified laboratories
have been used for the primary sample analysis:
|
·
|
SGS Ankara received samples from June 14, 2014; and
|
|
·
|
ALS Chemex in Ankara received samples from April 28, 2015.
|
Drillhole samples were
tested at ALS Chemex. Rock, soil and sediment samples were tested at SGS Ankara. Core samples were cut in half at site by the Artmin
geology department and sent directly to the laboratory. Necessary grinding and other preparations were done at the related laboratory.
Except for ALS Chemex and SGS Ankara, no other laboratory was used for sample preparation. The laboratory crushes and pulverising
the sample to produce a 30 gram charge for fire assay for gold, in addition to a 33 element four acid digestion with inductively
coupled plasma atomic emission spectroscopy (“
ICP-AES
”) analysis.
Normal security measures
are undertaken throughout the sampling and shipping processes. Half core is placed in a numbered sample bag and the other half
stored in the core box for reference. Collected samples are stored in an area of the camp at Yukarimaden that is separate from
the rest of the camp facilities to minimize unnecessary traffic near the sample processing area. After the samples are placed in
plastic bags and secured by ties, they are placed in sequence, inside a shelter constructed for that purpose. When sufficient samples
are generated, they are placed in larger sacks that are labelled with the sample sequence they contain, and the sacks are then
securely closed. Samples are then dispatched to SGS’s Ankara sample preparation laboratory. Currently the retained split
core is stored on site at Yukarimaden.
Based on the results
of the quality control, the Hod Maden Report considers the following:
|
·
|
the results from the blank assays indicate good equipment cleaning;
|
|
·
|
the laboratory has a low-grade bias for the two low grade gold standards (0.51 grams per tonne
gold and 0.643 grams per tonne gold);
|
|
·
|
the copper, lead and zinc standard results appear to more variable than the gold standards; and
|
|
·
|
the drillhole sample assays are suitable for the estimation and reporting of the Mineral Resources
under NI 43-101.
|
The SGS laboratory
is accredited/certified to ISO 9001 and independent from Mariana Resources/Lidya and any relationship is commercial in nature.
Mineral Processing and Metallurgical
Testing
SGS collected samples
from 19 drillholes for metallurgical testing. The samples collected were all located within the main area. The samples were collected
within the main lithological units containing the mineralization including the chlorite-andesite-breccia, andesite breccia, dacite
breccia, massive sulphide and gypsum volcano sedimentary material. The Hod Maden Report concludes that the samples collected were
appropriate to gain an understanding of the PFS level geometallurgy of the different rock types being mined and processed.
The Hod Maden project
deposit is characterised as relatively high sulphide (sulphide minerals represent about 25% of the material in the mineralised
zones) epithermal veins where the gold and mineralization is associated with sulphides (pyrite, chalcopyrite and in the south zone
some sphalerite) in brecciated veins set in a porphyritic andesite. Conventional ore processing techniques have been selected to
be tested in the laboratory in order to understand the suitability of process selection and provide interpreted metallurgical data
for subsequent metallurgical design.
The testing concept
that has been applied was to understand ore breakage parameters to liberate economic minerals and assess the response of mineral
processing concentration techniques to beneficiate the ore (froth flotation). There appears to be little gravity recoverable gold
and the gold is essentially very fine in nature. As stated above, most gold is associated with sulphides. Gold that cannot be concentrated
into a copper rich concentrate is quite refractory. Given social sensitivities, the use of cyanide in leaching or other processes
has been discounted.
Key outcomes of the
test work program and subsequent metallurgical interpretation include:
|
·
|
Ore types are moderately tough with an average unconfined compression strength (“
UCS
”)
of 120 megapascals;
|
|
·
|
Ore types are moderate hardness with maximum Bond Ball Work indices of 16.7 kilowatt hours/tonne;
|
|
·
|
Gravity recovery to what is essentially a sulphidic concentrate has been found to average no better
than 15%, and the concentrate realized was not upgradable to smelting feed;
|
|
·
|
Test work was conducted to investigate sequential flotation and bulk flotation followed by differential
flotation. It was originally envisaged that a saleable pyrite concentrate could be produced from a copper concentrate tailing (or
sequentially); however, it was discovered that the gold grade in the pyrite itself is quite low, hence even with high sulphur content
pyrite concentrates, the gold grades in such were quite low (i.e. the payability of gold in such and the NSR royalty would be quite
low after transport and treatment costs are applied; marketing opportunities also low);
|
|
·
|
Given these findings, focus was applied to maximizing gold recovery to copper concentrate. It was
found that the mill (to P
80
106 microns) – bulk float – mill (to 38 millimetres) – bulk (scavenger)
float, provided the highest net gold recovery to copper flotation feed, and once the bulk concentrate was reground to P
80
30 microns that gold recovery could be maximized to a +20% copper concentrate. Essentially the objectives in processing will be
to capture the copper minerals, gold associated with copper minerals, fine gold liberated from pyrite and the pyrite containing
higher concentrations of gold (essentially pyrite with gold on the surface of the crystals). Gold loss is essentially to the copper
scavenger tailing, which can realize a high sulphur pyrite concentrate, however, due to the questionable marketability of this
material (the value as acid plant feed is similar to the transportation cost if sent to northeast Asia) if payable levels of gold
concentration cannot be reached, a pyrite cleaning step has been excluded from the flow sheet at this stage. Interestingly, the
gold in the copper concentrate can be considered free milling, whereas the gold in tailing refractory;
|
|
·
|
Although fine grinding maximizes recovery, solid liquid separation of products is a challenge and
will require larger equipment than would be benchmarked against a similar project. Given that the copper circuit tailing contains
significant gold, it will be discharged into a conventional valley fill tailings storage facility for potential future exploitation.
Low sulphide bulk flotation tailings will be used for paste backfill; hence a filtration application will be necessary. The fineness
of the bulk tailing also causes high cement addition demand to reach target backfill strength; and
|
|
·
|
Overall recovery is predicted at 77% for gold and 94% for copper to concentrate. There is potential
to increase recovery (up to 93% for gold) by the application of a leach and recovery circuit to treat flotation tailings (which
is subject to a deferred study/capital project).
|
Mineral Resource and Mineral Reserve
Estimates
The following table
sets forth the estimated Mineral Resources for the Hod Maden project as of May 31, 2018. Only gold and copper are considered economic.
|
|
Tonnes
(000s)
|
|
|
Gold Equivalent (grams per
tonne)
|
|
|
Gold Grade
(grams per
tonne)
|
|
|
Copper
(%)
|
|
|
Silver Grade (grams per
tonne)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Main Area
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Measured
|
|
|
4,630
|
|
|
|
12.8
|
|
|
|
9.6
|
|
|
|
1.5
|
|
|
|
2.6
|
|
Indicated
|
|
|
4,507
|
|
|
|
14.0
|
|
|
|
9.8
|
|
|
|
2.0
|
|
|
|
5.1
|
|
Total Measured and Indicated:
|
|
|
9,137
|
|
|
|
13.4
|
|
|
|
9.7
|
|
|
|
1.8
|
|
|
|
3.9
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
South Area
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Measured
|
|
|
0
|
|
|
|
0
|
|
|
|
0
|
|
|
|
0
|
|
|
|
0
|
|
Indicated
|
|
|
2,522
|
|
|
|
4.2
|
|
|
|
3.5
|
|
|
|
0.3
|
|
|
|
0.9
|
|
Total Measured and Indicated:
|
|
|
2,522
|
|
|
|
4.2
|
|
|
|
3.5
|
|
|
|
0.3
|
|
|
|
0.9
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Total Main Area plus South Area
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Measured
|
|
|
4,630
|
|
|
|
12.8
|
|
|
|
9.6
|
|
|
|
1.5
|
|
|
|
2.6
|
|
Indicated
|
|
|
7,029
|
|
|
|
10.5
|
|
|
|
7.6
|
|
|
|
1.4
|
|
|
|
3.6
|
|
Total Measured and Indicated:
|
|
|
11,659
|
|
|
|
11.4
|
|
|
|
8.4
|
|
|
|
1.5
|
|
|
|
3.2
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Inferred
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Main Area
|
|
|
447
|
|
|
|
3.7
|
|
|
|
1.6
|
|
|
|
1.0
|
|
|
|
1.6
|
|
South Area
|
|
|
416
|
|
|
|
3.6
|
|
|
|
3.0
|
|
|
|
0.3
|
|
|
|
0.7
|
|
Total Inferred:
|
|
|
864
|
|
|
|
3.7
|
|
|
|
2.3
|
|
|
|
0.7
|
|
|
|
1.2
|
|
|
(1)
|
All Mineral Resources conform to NI 43-101 and CIM
definitions for Mineral Resources.
|
|
(2)
|
Mineral Resources are based on a cut-off grade of
2.0 grams per tonne gold equivalent.
|
|
(3)
|
Mineral Resources metal prices: U.S.$1,250 per ounce
gold and U.S.$3.00 per pound copper.
|
|
(4)
|
Mineral Resources are total and inclusive of any Mineral
Reserves.
|
|
(5)
|
Totals may not add up due to rounding.
|
|
(6)
|
No allowance has been made for any previous mining.
|
|
(7)
|
The gold equivalent formula is:
AuEq = Au grams
per tonne + [Cu % * (Metallurgical Recovery of Cu in % * Payable Cu in % * (Price of Cu in U.S.$/lb less realisation costs) less
royalty * 22.046) / (Recovery of Au in % * Payable Au in % * (Price of Au in U.S.$ per gram less realisation costs) less royalty)].
|
|
(8)
|
The South Area is defined as being south of 4,542,025
mN. Rodney Webster, M.AIG, Principal Geologist for AMC, a QP under NI 43-101, has reviewed and approved the Mineral Resources
set forth above.
|
AMC has stated in the Hod Maden Report that they are not aware
of any environmental, permitting, legal, title, taxation, socioeconomic, marketing, political or other similar factors that could
materially affect the stated Mineral Resource estimates set forth above.
The following table
sets forth the estimated Mineral Reserves for the Hod Maden Project as of May 31, 2018.
Classification
|
|
Tonnes
(000s)
|
|
|
Gold Grade
(grams per
tonne)
|
|
|
Copper
(%)
|
|
|
Gold Equivalent
(grams per
tonne)
|
|
|
Contained Gold
Ounces (000s)
|
|
|
Contained
Copper
(millions of
pounds)
|
|
Proven
|
|
|
4,289
|
|
|
|
8.6
|
|
|
|
1.4
|
|
|
|
11.6
|
|
|
|
1,191
|
|
|
|
59
|
|
Probable
|
|
|
4,831
|
|
|
|
9.1
|
|
|
|
1.4
|
|
|
|
12.2
|
|
|
|
1,418
|
|
|
|
70
|
|
Total:
|
|
|
9,120
|
|
|
|
8.9
|
|
|
|
1.4
|
|
|
|
11.9
|
|
|
|
2,609
|
|
|
|
129
|
|
|
(1)
|
All Mineral Reserves conform to NI 43-101 and CIM
definitions for Mineral Reserves.
|
|
(2)
|
The Mineral Reserves estimation was carried out using
a cut-off grade of 2.6 grams per tonne gold equivalent and a mining recovery of 95%.
|
|
(3)
|
Mineral Reserve metal prices: U.S.$1,250 per ounce
gold and U.S.$3.00 per pound copper.
|
|
(4)
|
Totals may not add up due to rounding.
|
|
(5)
|
The gold equivalent formula is:
AuEq = Au grams
per tonne + [Cu % * (Metallurgical Recovery of Cu in % * Payable Cu in % * (Price of Cu in U.S.$/lb less realisation costs) less
royalty * 22.046) / (Recovery of Au in % * Payable Au in % * (Price of Au in U.S.$ per gram less realisation costs) less royalty)].
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(6)
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Silver is not included in the gold equivalent calculation.
It contributes only about 0.1% to the ore value.
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(7)
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Mineral Reserves are reported on the basis of mined
ore to be delivered to the plant as mill feed.
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(8)
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Processing recovery and payable factors used were
77.1% and 93.9% respectively for gold and 94.2% and 95.0% respectively for copper.
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(9)
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Average planned and unplanned dilution factors of
12% and 6% respectively for transverse stoping and 44% and 10% respectively for longitudinal stoping were assumed.
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(10)
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Mineral Reserves were defined within an underground
mine plan generated considering diluted Measured and Indicated Mineral Resources.
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(11)
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Exchange rate used is 3.78 Turkish Lira = U.S.$1.00.
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(12)
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Andrew Hall, MAusIMM CP (Mining), Director/Principal
Consultant for AMC, a QP under NI 43-101, has reviewed and approved the Mineral Reserves set forth above.
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AMC is not aware of
any mining, metallurgical, infrastructure, permitting or other issues above those discussed in the Hod Maden Report which could
materially affect the stated Mineral Reserve estimates set forth above.
Permitting, Environmental and Social
Fundamental for advancing
the Hod Maden project will be a positive decision for its Environmental Impact Assessment (“
EIA
”). Artmin has
completed most of the environmental base line studies and commenced activities related to the preparation of its EIA in the summer
of 2018. The EIA will be submitted for approval to the General Directorate of Environmental Impact Assessment, Permit and Inspection
(part of the Ministry of Environment and Urbanisation). To date, Artmin has obtained numerous permits to complete exploration activities
on the Hod Maden project, however, the list of permits which will be required throughout the project cycle are numerous and these
various permits will be applied for, as and when required, throughout the Hod Maden project life. The permitting approval process
in Turkey for these required permits will range from two to twelve months, depending on the type of permit requested.
No endangered fauna
species have been observed in the Hod Maden project area. Two endemic and critically endangered flora species have been identified,
however, these plants should be easily propagated by seed and a programme is being planned to nursery these plants. These plants
do not actually occur in areas earmarked for disturbance/direct impact.
Detailed baseline studies
have been completed to provide the required level of information for development and submission of the EIA with respect to air
quality, noise, water quality, morphology, climate and soil. Surface water hydrology and hydrogeological studies are in progress.
Traffic and socio-economic surveys are also planned; however, preliminary data has been formulated.
As a result of the
identification of the different activities carried out at the different stages of the Hod Maden project (construction, operation,
and closure) and the assessment of the various environmental impacts (physical, biotic, socioeconomic, and cultural), an environmental
management strategy has been developed for the Hod Maden project. The environmental management strategy has been developed according
to the following objectives:
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ensuring that the operations developed by Artmin comply with the laws, regulations, ordinances,
and environmental rules currently in force in Artvin province and Turkey;
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preventing, controlling, minimizing, and mitigating the negative environmental impact that may
arise during the different project stages; and
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promoting the positive impact on the socioeconomic and technological areas, thus ensuring the participation
of the local community in the achievements, under the concept of sustainable development.
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Mining Operations, Infrastructure
and Capital and Operating Costs
According to the Hod
Maden Report, exploration, test work and study work to date has indicated that the exploitation of the Hod Maden project is potentially
economically viable.
The Hod Maden project
is at an early development stage and a considerable number of tasks need to be completed before advancing the project to production.
It is expected that 2018 and 2019 will be taken up with completing further field investigation work, more metallurgical testing
and a definitive feasibility study. In parallel with this, environmental permitting will be applied for, take-off agreements discussed,
and funding sought. It is projected that an early works programme will be able to commence in 2019, which will involve camp construction
and tunnelling. If this starts in Q3 2019, first ore presentation is scheduled for Q4 2021 (Yr 1), with processing targeted at
Q1 2022 (Yr 1).
The implementation
schedule developed for the Hod Maden project has been based on a 76- week plant and infrastructure design and construction period,
with the requirement that first concentrate will be produced in Week 82 and full nameplate production capacity will be reached
by Week 94. The Hod Maden project execution schedule reflects the work required from detailed engineering, through construction
to commissioning. The schedule assumes that there is a seamless advancement of the Hod Maden project between the various phases
of project development.
It is envisaged that
Artmin will appoint an engineering and construction company to execute the project on an EPC or EPCM basis, except for the development
of the portals and declines.
The Hod Maden Report
contemplates the Hod Maden Project as an underground mine utilizing mechanized methods include transverse and longitudinal long
hole open stoping with paste backfill. The main area will be mined from the bottom up in primary and secondary stopes with expected
mine production of 900,000 tonnes per annum and a total of 9.1 million tonnes of ore produced during the eleven-year mine life
at an average life of mine mill feed grade of 8.9 grams per tonne gold and 1.4% copper, realising 2,030,000 ounces of gold and
122,800 tonnes of copper contained in concentrate. Ore processing contemplates a single stage crush, various stages of milling,
bulk floatation roughing, various stages of copper cleaning and regrind to produce a single copper concentrate containing gold.
That concentrate will be transported to the Hopa port located on the Black Sea in Turkey for shipment to smelting facilities. The
mill will be built in the nearby Saliçor Valley to avoid contact with existing roads and housing. A tailings storage facility
and waste dumps will be located on surface as will a main office, 120-person camp, laboratory, storage and water treatment facilities.
Grid power is available on site and some workforce can be based out of nearby Artvin city.
The initial capital
cost for the Hod Maden project has been estimated at U.S.$272 million, including VAT and contingency, comprised of: (i) U.S.$204
million for all plant, infrastructure, energy, tailings dam, engineering and construction contractors and ancillary equipment;
and (ii) U.S.$68 million for mining costs. Including sustaining capital and closure, the total capital cost for the life of the
Hod Maden project has been estimated to be U.S.$394 million. These costs include allowance for working capital or pre-operating
costs during the construction to cover pre-operation, start-up of the infrastructure and equipment under the scope of Artmin (owner’s
costs). The base case economic model assumes a gold price of U.S.$1,300 per ounce and a copper price of U.S.$3.00 per pound.
Mining capital costs
are based on owner underground mining and owner management and technical services and are estimated at U.S.$162 million, comprised
of U.S.$68 million for initial capital and U.S.$94 million sustaining capital. Underground mining capital costs include the purchase
of the mining fleet, major overhauls of the fleet, capital lateral and vertical development and underground infrastructure. Based
on the current mine plan: (i) underground mining operating costs have been estimated to average U.S.$27.50 per tonne of ore for
the life of mine; (ii) process plant operating costs have been estimated at U.S.$23.20 per tonne of ore for the life of mine; and
(iii) general and administration costs, which includes the accommodation camp for a limited number of employees have been estimated
at U.S.$10.50 per tonne of ore.
The Hod Maden project
has an estimated internal rate of return of 60% (pre-tax), 50% (post-tax), and an estimated payback period of 18 months (post-tax)
post ore processing commencement, using a gold price of U.S.$1,300 per ounce and a copper price of U.S.$3.00 per pound.
Exploration and Development
With the release of
the Hod Maden Report, the Hod Maden project moves into the next stage of development. The majority operator, Lidya, has commenced
the permitting process and is currently working on a gap analysis and trade-off studies. Activities related to the preparation
of a feasibility study began in Q4 of 2018. A total of 36 diamond drillholes containing 11,084 metres of drilling was completed
at the Hod Maden project in 2018.
Current activities
at the Hod Maden project include:
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commencement of environmental studies as part of the EIA; and
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Artmin has prepared and distributed a request for proposal for the preparation of the Hod Maden
feasibility study.
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