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