Resource drilling on the South Body designed to
extend the mineralised trend has successfully intersected further
mineralisation at the southern end of the South Body. The intercept
confirms the continuation of magnetite skarn a further 30 meters
from the successful drill holes MDH-95 and MDH-94 (RTG reported ASX
14th April 2015).
Additional Magnetite Skarn mineralization, currently outside the
resource model, was intersected in hole MDH-100A, with
36m for 3.34 g/t Au and 3.25% Cu confirming the
continuation along strike of the magnetite skarn. Exploration
activity at the project is ongoing with the current resource open
down dip, down plunge and along strike in both directions, with all
mineralisation found to date being shallow enough to be amenable to
open pit mining techniques.
The drill hole reported is from the
southern-most section drilled at the Mabilo system to date, a
significant step out from the previous section by approximately 30
meters. The section identified extensive high grade bornite
mineralisation not previously intercepted. MDH-100A follows up on
the previous section and has successfully delineated additional
magnetite skarn mineralisation beyond the previous resource model
(RTG ASX release 24th November
2014).
Drilling is ongoing and currently focused on
upgrading the resource classification (RTG ASX release
24th November 2014) over
the South Body and North Body.
MDH-100A (figure 3) was designed as a follow-up
hole to the successful MDH-95 & MDH-94 (RTG ASX release on
14th April 2015).
Targeting the strike extension of the magnetite, significant
mineralisation was intersected with extensive secondary bornite
mineralisation overprinting primary coarse grained chalcopyrite.
Minor instances of chalcocite and lesser base metals were also
observed. MDH099 drilled on the same section observed a volcanic
breccia overprinting the mineral system resulting in lower grades
(29 meters @ 0.66 g/t Au & 0.31% Cu). Mineralisation is present
down hole as magnetite clasts within the volcanic breccia.
MDH-100A was successful in targeting
mineralisation outside the previously interpreted magnetic model at
significant depth. Insufficient drilling on the section has not
allowed for true widths to be determined as this time, intervals
are reported as down hole.
The information in this report that relates to
Exploration Results at the Mabilo Project is based upon information
prepared by or under the supervision of Robert Ayres BSc (Hons), who is a Qualified
Person and a Competent Person. Mr Ayres is a member of the
Australian Institute of Geoscientists and a full-time employee of
Mt Labo Exploration and Development Company, a Philippine mining
company, and an associate company of RTG Mining Limited. Mr Ayres
has sufficient experience that is relevant to the style of
mineralisation and type of deposit under consideration and to the
activity being undertaken, to qualify as a Competent Person as
defined in the 2012 Edition of the "Australasian Code for Reporting
of Exploration Results, Mineral Resources and Ore Reserves" and to
qualify as a "Qualified Person" under National Instrument 43-101 -
Standards of Disclosure for Mineral Projects ("NI 43-101"). Mr.
Ayres has verified the data disclosed in this release, including
sampling, analytical and test data underlying the information
contained in the release. Mr. Ayres consents to the inclusion in
the report of the matters based on his information in the form and
the context in which it appears.
RTG Mining Inc. is a mining and exploration
company listed on the main board of the Toronto Stock Exchange and
Australian Securities Exchange Limited. RTG is focused on
developing the high grade copper/gold/magnetite Mabilo Project and
advancing exploration on the highly prospective Bunawan Project,
both in the Philippines, while
also identifying major new projects which will allow the Company to
move quickly and safely to production.
RTG has an experienced management team
(previously responsible for the development of the Masbate Gold
Mine in the Philippines through
CGA Mining Limited), and has B2Gold as one of its major
shareholders in the Company. B2Gold is a member of both the
S&P/TSX Global Gold and Global Mining Indices.
This announcement includes certain
"forward-looking statements" within the meaning of Canadian
securities legislation. Accuracy of mineral resource and mineral
reserve estimates and related assumptions and inherent operating
risks, are forward-looking statements. Forward-looking statements
involve various risks and uncertainties and are based on certain
factors and assumptions. There can be no assurance that such
statements will prove to be accurate, and actual results and future
events could differ materially from those anticipated in such
statements. Important factors that could cause actual results to
differ materially from RTG's expectations include uncertainties
related to fluctuations in gold and other commodity prices and
currency exchange rates; uncertainties relating to interpretation
of drill results and the geology, continuity and grade of mineral
deposits; uncertainty of estimates of capital and operating costs,
recovery rates, production estimates and estimated economic return;
the need for cooperation of government agencies in the development
of RTG's mineral projects; the need to obtain additional financing
to develop RTG's mineral projects; the possibility of delay in
development programs or in construction projects and uncertainty of
meeting anticipated program milestones for RTG's mineral projects
and other risks and uncertainties disclosed under the heading "Risk
Factors" in RTG's Annual Information Form for the year ended
31 December 2014 filed with the
Canadian securities regulatory authorities on the SEDAR website at
sedar.com.
MDH-101 failed to intersect significant magneite
skarn.
All co-ordinates in UTM-WGS84 (51 N). All
collars have been surveyed using handheld GPS and will be subject
to professional survey pickup at a later date using DGPS
system.
| Criteria |
JORC Code explanation |
Commentary |
| Sampling
techniques |
- Nature and quality of sampling (e.g. cut channels, random
chips, or specific specialised industry standard measurement tools
appropriate to the minerals under investigation, such as down hole
gamma sondes, or handheld XRF instruments, etc). These examples
should not be taken as limiting the broad meaning of
sampling.
|
- The assay data reported herein is based on sampling of diamond
drill core of PQ, HQ and NQ diameter which was cut with a diamond
core saw. Samples are generally of 1 m length, although
occasionally slightly longer or shorter where changes in lithology,
core size or core recovery required adjustments; samples are not
more than 2 m length.
|
| |
- Include reference to measures taken to ensure sample
representivity and the appropriate calibration of any measurement
tools or systems used.
|
- The length of each drill run is recorded and the recovery for
each run calculated on site and checked again at the core shed.
Certified reference standards and blank samples were submitted to
assess the accuracy and precision of the results and every 20th
sample was sawn into two and the two quarter core samples submitted
for analysis separately as a duplicate sample.
|
| |
- Aspects of the determination of mineralisation that are
Material to the Public Report.
|
- Half core samples were cut and sent for analysis by an
independent ISO-certified laboratory (Intertek McPhar Laboratory)
in Manila. Samples were crushed and pulverised (95% 75 μm). Gold
was analysed by 50 g fire assay and the other elements including
copper and iron by ICP-MS (Inductively Coupled Plasma Mass
Spectrometry) or ICP-OES (Inductively Coupled Plasma Optical
Emission Spectrometry) following a four-acid digest.
|
| Drilling
techniques |
- Drill type (e.g. core, reverse circulation, open-hole hammer,
rotary air blast, auger, Bangka, sonic, etc) and details (eg core
diameter, triple or standard tube, depth of diamond tails,
face-sampling bit or other type, whether core is oriented and if
so, by what method, etc).
|
- Drilling was by PQ, HQ and NQ diameter, triple tube diamond
coring. The core was not orientated.
|
| Drill sample
recovery |
- Method of recording and assessing core and chip sample
recoveries and results assessed.
|
- Core recovery is initially measured on site by trained
technicians and by the supervising geologist. Any core loss is
measured, the percentage is calculated and both are recorded in the
geotechnical log for reference when assessing assay results.
|
| |
- Measures taken to maximise sample recovery and ensure
representative nature of the samples.
|
- All care is taken to ensure maximum recovery of diamond core
and drillers are informed of the importance of core recovery. Any
areas of poor core recovery are sampled separately thus assay
results can be directly related to core recovery. The majority of
the mineralisation is in fresh rock where recoveries are greater
than 90%. Most mineralisation occurs in wide intersections of
massive magnetite skarn with relatively uniform copper and gold
grades. Core loss occurs in fracture zones but is usually not a
significant problem i.e. the core lost in fracture zones is
unlikely to have been significantly higher or lower grade than the
surrounding material. In the weathered hematitic oxidised zones
some core loss is unavoidable, but overall recovery is generally
>90% and the core loss is volumetrically minor in the
mineralised zones. In areas of poor recovery, the sample intervals
are arranged to coincide with drill runs, thus areas of different
core loss percentage are specific to individual samples which can
be assessed when interpreting analytical results and modelled in
future resource estimation studies. Where an area of 100% core loss
is identified the sample intervals are marked to each side of the
zone and the zone is designated "No core" and assigned zero value
in the various log sheets and geochemical database.
|
| |
- Whether a relationship exists between sample recovery and
grade and whether sample bias may have occurred due to preferential
loss/gain of fine/coarse material.
|
- There is no discernible relationship between core recovery and
grade. The skarn bodies are relatively uniform over significant
lengths and the copper and gold grades are not related to clay and
fracture zones which are the main causes of core loss.
|
| Logging |
- Whether core and chip samples have been geologically and
geotechnically logged to a level of detail to support appropriate
Mineral Resource estimation, mining studies and metallurgical
studies.
|
- Diamond drill core for each entire drill hole was logged in
significant detail in a number of logging sheets including a
geological log, a structural log, a geotechnical log and a magnetic
susceptibility log for the entire drill hole. Mineralised and
sampled intervals are logged individually in a separate
quantitative mineral log with percentages of the different copper
minerals being recorded. The logging is appropriate for mineral
resource estimates and mining studies.
|
| |
- Whether logging is qualitative or quantitative in nature.
Core (or costean, channel, etc.) photography.
|
- Most of the geological logging is a mixture of qualitative
(descriptions of the various geological features) and quantitative
(numbers and angles of veins and fracture zones, mineral
percentages etc.). The quantitative mineralisation log and the
magnetic susceptibility log are quantitative. Photographs are taken
of all core (both wet and dry) prior to the core being cut.
|
| |
- The total length and percentage of the relevant
intersections logged.
|
- All core, including barren overburden is logged in the various
logging sheets noted above apart from the quantitative
mineralisation log in which only the mineralised intervals sent for
geochemical analysis are logged in greater detail.
|
| Sub-sampling techniques and
sample preparation |
- If core, whether cut or sawn and whether quarter, half or
all core taken.
|
- All sampling data is from diamond drill core. Samples are of
sawn half core except for duplicate samples which are quarter core.
Half core is bagged and sent to an ISO-certified independent
laboratory for analysis. The other half retained for reference
and/or further testwork.
|
| |
- If non-core, whether riffled, tube sampled, rotary split,
etc and whether sampled wet or dry.
|
- Not applicable for diamond core drilling.
|
| |
- For all sample types, the nature, quality and
appropriateness of the sample preparation technique.
|
- All core samples were dried, crushed to 95% 10 mm and a 1.5 kg
sub-sample is separated using a riffle splitter and pulverised to
95% 75 μm. A 50 g sub-sample is utilised as a fire-assay
charge for gold analysis. The sample preparation technique and
sub-sampling is appropriate for the mineralisation.
|
| |
- Quality control procedures adopted for all sub-sampling
stages to maximise representivity of samples.
|
- Blank samples and duplicate samples are submitted routinely to
monitor the sampling and analytical process and to ensure that
samples are representative of in situ material. One in every 20
samples of half core is sawn again to produce two quarter core
duplicate samples which are submitted to the laboratory separately
with different sample numbers. A blank sample was inserted into
sample batches at every 20th sample.
|
| |
- Measures taken to ensure that the sampling is representative
of the in situ material collected, including for instance results
for field duplicate/second-half sampling.
|
- The magnetite skarn mineralisation occurs in extensive zones of
magnetite skarn with disseminated chalcopyrite, containing gold.
The sample size of approximately 1 m core length is suitable in
respect to the grain size of the mineralisation.
|
| |
- Whether sample sizes are appropriate to the grain size of
the material being sampled.
|
- The sample size is considered appropriate for the material
sampled. It is believed that grain size has no bearing on the grade
of the sampled material.
|
| Quality of assay data and
laboratory tests |
- The nature, quality and appropriateness of the assaying and
laboratory procedures used and whether the technique is considered
partial or total.
|
- All core samples were analysed at an ISO-certified independent
laboratory. Gold was analysed by 50 g fire assay and the other
elements including copper and iron were analysed by ICP-MS or
ICP-OES following a four acid digest. The sample preparation and
assay techniques are of international industry standard and can be
considered total.
|
| |
- For geophysical tools, spectrometers, handheld XRF
instruments, etc, the parameters used in determining the analysis
including instrument make and model, reading times, calibrations
factors applied and their derivation, etc.
|
- No geophysical tools were used for any analysis reported
herein. Magnetic susceptibility readings are used in magnetic
modelling but are not used to estimate magnetite or Fe
content.
|
| |
- Nature of quality control procedures adopted (e.g.
standards, blanks, duplicates, external laboratory checks) and
whether acceptable levels of accuracy (ie lack of bias) and
precision have been established
|
- Quality control completed by RTG included analysis of
standards, blanks, and duplicates. Commercial Certified Reference
Materials were inserted into sample batches every 40th
sample. A blank sample was inserted every 20th sample;
the blank sample material has been sourced and prepared from a
local quarry. One in every 20 core samples is cut into 2 quarter
core samples which were submitted independently with their own
sample numbers. In addition, Intertek conducted their own extensive
check sampling as part of their own internal QAQC processes which
is reported in the assay sheets. A record of results from all
duplicates, blanks and standards is maintained for ongoing QA/QC
assessment. Examination of all the QAQC sample data indicates
satisfactory performance of field sampling protocols and the assay
laboratory.
|
| Verification of sampling and
assaying |
- The verification of significant intersections by either
independent or alternative company personnel.
|
- Significant mineralisation intersections were verified by
alternative company personnel.
|
| |
- The use of twinned holes.
|
- No twinned holes have been drilled.
|
| |
- Documentation of primary data, data entry procedures, data
verification, data storage (physical and electronic)
protocols.
|
- Data documentation, verification and storage is conducted in
accordance with RTG's Standard Operating Procedures Manual for the
Mabilo Project. The diamond drill core is manually logged in
significant detail in a number of separate Excel template logging
sheets. Logging is recorded manually on logging sheets and
transcribed into protected Excel spreadsheet templates or entered
directly into the Excel templates. The data are validated by both
the Project Geologist and the company Database Manager and uploaded
to the dedicated project database where they are merged with assay
results reported digitally by the laboratory. Hard copies of all
logging sheets are kept at the Project office in Daet.
|
| |
- Discuss any adjustment to assay data.
|
- No adjustments have been made to assay data.
|
| Location of data
points |
- Accuracy and quality of surveys used to locate drill holes
(collar and down-hole surveys), trenches, mine workings and other
locations used in Mineral Resource estimation.
|
- Drill-hole collars are initially surveyed with a hand-held GPS
with an accuracy of approximately +/- 5 m. Completed holes are
surveyed by an independent qualified surveyor on a periodic basis
using standard differential GPS (DGPS) equipment achieving
sub-decimetre accuracy in horizontal and vertical position.
|
| |
- Specification of the grid system used.
|
- Drill collars are surveyed in UTM WGS84 Zone 51N grid.
|
| |
- Quality and adequacy of topographic control.
|
- The Mabilo project area is relatively flat with total variation
in topography less than 15 m. Topographic control is provided by
DGPS surveying.
|
| Data spacing and
distribution |
- Data spacing for reporting of Exploration Results.
|
- Drill holes are planned on a nominal grid with 20 m between
drill holes on 40 m spaced lines.
|
| |
- Whether the data spacing and distribution is sufficient to
establish the degree of geological and grade continuity appropriate
for the Mineral Resource and Ore Reserve estimation procedure(s)
and classifications applied.
|
- The drill hole spacing was designed to determine the continuity
and extent of the mineralised skarn zones. Based on statistical
assessment of drill results to date, the nominal 40 x 20 m drill
hole spacing is sufficient to support Mineral Resource
estimation.
|
| |
- Whether sample compositing has been applied.
|
- No compositing of intervals in the field was undertaken.
|
| Orientation of data in relation
to geological structure |
- Whether the orientation of sampling achieves unbiased
sampling of possible structures and the extent to which this is
known, considering the deposit type.
|
- No bias attributable to orientation of sampling upgrading of
results has been identified.
|
| |
- If the relationship between the drilling orientation and the
orientation of key mineralised structures is considered to have
introduced a sampling bias, this should be assessed and reported if
material.
|
- No bias attributable to orientation of sampling upgrading of
results has been identified.
|
| Sample security |
- The measures taken to ensure sample security.
|
- Chain of custody is managed by RTG employees. Samples were
stored in secure storage from the time of drilling, through
gathering and splitting. Remaining core is kept in a secure
compound at the Company regional office in Daet town and guarded at
night. Samples are sent directly from the core shed to the
laboratory packed in secured and sealed plastic drums using either
Company vehicles or a local transport company. A standard Chain of
Custody form is signed by the driver responsible for transporting
the samples upon receipt of samples at the core yard and is signed
by an employee of the laboratory on receipt of the samples at the
laboratory. Completed forms are returned to the Company for
filing.
|
| Audits or reviews |
- The results of any audits or reviews of sampling techniques
and data.
|
- The sampling techniques and QA/QC data are reviewed on an
ongoing basis by Company management and independent
consultants.
|
| Criteria |
JORC Code explanation |
Commentary |
| Mineral tenement and land
tenure status |
- Type, reference name/number, location and ownership
including agreements or material issues with third parties such as
joint ventures, partnerships, overriding royalties, native title
interests, historical sites, wilderness or national park and
environmental settings.
|
- The Mabilo Project is covered by Exploration Permit
EP-014-2013-V and Exploration Permit Applications EXPA-000188-V and
EXPA-0000209-V. EP-014-2013-V was issued to Mt Labo Exploration and
Development Corporation ("Mt Labo"), an associated entity of RTG
Mining Inc. There is a 1% royalty payable on net mining revenue
received by Mt Labo in relation to EP-014-2013-V.
Mt Labo has entered into a joint venture agreement with Galeo
Equipment and Mining Company, Inc. ("Galeo") to partner in
exploring and developing the Mabilo and Nalesbitan Projects. Galeo
can earn up to a 36% interest in the Projects, down to 200 m below
surface, by contributing approximately US$4,250,000 of exploration
drilling and management services for the Projects over a 2 year
period.
In November 2013, Sierra Mining Limited ("Sierra"), a wholly owned
subsidiary of RTG, and Galeo signed a Memorandum of Understanding
("MOU") setting out proposed changes to the joint venture agreement
to remove the depth limit of 200 m from the agreement and provide
for additional drilling of 5,000 m below 200 m. The MOU also
provides for Galeo to be granted its 36% interest up front with the
ability for RTG to claw-back any interest deemed not earned at the
end of the claw-back period. The amendments to the JV Agreement are
subject to Sierra shareholder approval.
Sierra has also entered a second MOU with Galeo whereby Galeo can
earn an additional 6% interest in the joint venture by mining the
initial 1.5 Mt of waste at Mabilo or Nalesbitan and other
requirements including assistance with permitting. The MOU is
subject to a number of conditions precedent, including Sierra
shareholder approval.
|
| |
- The security of the tenure held at the time of reporting
along with any known impediments to obtaining a license to operate
in the area.
|
- The tenure over the area currently being explored at Mabilo is
a granted Exploration Permit which is considered secure. There is
no native title or Indigenous ancestral domains claims at
Mabilo.
|
| Exploration done by other
parties |
- Acknowledgment and appraisal of exploration by other
parties.
|
- The only significant previous exploration over the Mabilo
project area was a drilling program at another site within the
tenement and a ground magnetic survey. RTG (or its predecessor
Sierra) has reported this data in previous reports to the ASX and
used the ground magnetic survey as a basis for initial drill
siting. Subsequently RTG conducted its own ground magnetic survey
with closer spaced survey lines and reading intervals which
supersedes the historical program. There was no known previous
exploration in the area of the reported Mineral Resource.
|
| Geology |
- Deposit type, geological setting and style of
mineralisation.
|
- Mineralisation at Mabilo can be defined as a
magnetite-copper-gold skarn which developed where the
magnetite-copper-gold mineralisation replaced calcareous horizons
in the Eocene age Tumbaga Formation in the contact zone of a
Miocene diorite intrusion.
|
| Drill hole
Information |
- A summary of all information material to the understanding
of the exploration results including a tabulation of the following
information for all Material drill holes:
- easting and northing of the drill hole collar
- elevation or RL (Reduced Level - elevation above sea level
in metres) of the drill hole collar
- dip and azimuth of the hole
- down hole length and interception depth
- hole length.
|
- All relevant drill hole information has been previously
reported to the ASX. No material changes have occurred to
this information since it was originally reported.
|
| |
- If the exclusion of this information is justified on the
basis that the information is not Material and this exclusion does
not detract from the understanding of the report, the Competent
Person should clearly explain why this is the case.
|
- All relevant data has been reported.
|
| Data aggregation
methods |
- In reporting Exploration Results, weighting averaging
techniques, maximum and/or minimum grade truncations (e.g. cutting
of high grades) and cut-off grades are usually Material and should
be stated.
|
- Not reporting exploration results.
|
| |
- Where aggregate intercepts incorporate short lengths of high
grade results and longer lengths of low grade results, the
procedure used for such aggregation should be stated and some
typical examples of such aggregations should be shown in
detail.
|
- Not reporting exploration results.
|
| |
- The assumptions used for any reporting of metal equivalent
values should be clearly stated.
|
- No metal equivalent grades have been used.
|
| Relationship between
mineralisation widths and intercept lengths |
- These relationships are particularly important in the
reporting of Exploration Results.
|
- The Mabilo drill have been drilled both vertically and
inclined. The orientation of the mineralised bodies is based on
interpretation of geology from drill holes supported by magnetic
modelling which indicates that much of the mineralisation is
dipping to the southwest.
|
| |
- If the geometry of the mineralisation with respect to the
drill hole angle is known, its nature should be reported.
|
- The interpreted orientation of the mineralised bodies is based
on magnetic modelling and drill-hole data and is documented in the
report. The fact that the intersections are in a dipping body and
therefore not true widths has been reported.
|
| |
- If it is not known and only the down hole lengths are
reported, there should be a clear statement to this effect (eg
'down hole length, true width not known').
|
- No intervals reported can be assumed to be a true width of the
mineralisation.
|
| Diagrams |
- Appropriate maps and sections (with scales) and tabulations
of intercepts should be included for any significant discovery
being reported These should include, but not be limited to a plan
view of drill hole collar locations and appropriate sectional
views.
|
- Refer to figures within the main body of this report.
|
| Balanced reporting |
- Where comprehensive reporting of all Exploration Results is
not practicable, representative reporting of both low and high
grades and/or widths should be practiced to avoid misleading
reporting of Exploration Results.
|
|
| Other substantive exploration
data |
- Other exploration data, if meaningful and material, should
be reported including (but not limited to): geological
observations; geophysical survey results; geochemical survey
results; bulk samples - size and method of treatment; metallurgical
test results; bulk density, groundwater, geotechnical and rock
characteristics; potential deleterious or contaminating
substances.
|
- All meaningful exploration data concerning the Mabilo Project
has been reported in previous reports to the ASX.
|
| Further work |
- The nature and scale of planned further work (e.g. tests for
lateral extensions or depth extensions or large-scale step-out
drilling).
|
- Drilling is ongoing at the Mabilo Project which will
systematically test magnetic bodies and step-out targets along
strike and between the North Mineralised Zone and the South
Mineralised Zone as well as down-dip from these zones.
|
| |
- Diagrams clearly highlighting the areas of possible
extensions, including the main geological interpretations and
future drilling areas, provided this information is not
commercially sensitive.
|
- Refer to figures within the main body of this report.
|
SOURCE RTG Mining Inc.
Image with caption: "Figure 1. Location of drill holes and
reported in this release on RTP ground magnetic image. (CNW
Group/RTG Mining Inc.)". Image available at:
http://photos.newswire.ca/images/download/20150618_C9662_PHOTO_EN_43564.jpg
Image with caption: "Figure 2. - Schematic long section showing
isotropic copper grade shells, location of significant intercepts
with intercepts highlighted in this release. (CNW Group/RTG Mining
Inc.)". Image available at:
http://photos.newswire.ca/images/download/20150618_C9662_PHOTO_EN_43565.jpg
Image with caption: "Figure 3 Schematic geology cross section
MDH100A with intercept highlighted. (CNW Group/RTG Mining Inc.)".
Image available at:
http://photos.newswire.ca/images/download/20150618_C9662_PHOTO_EN_43566.jpg