Early December Follow Up Drilling at Silica Hihll
Released
Released
Announcement PDF
ASX ANNOUNCEMENT
Date: 11 November 2016
Number: 493/111116
DRILLING TO BE FAST TRACKED AT HIGH GRADE GOLD SILVER DISCOVERY
NEAR ORANGE IN NSW - EARLY DECEMBER START
Impact Minerals Limited (ASX:IPT) has elected to fast-track the start of a follow-up drill programme at
its high grade gold-silver discovery at the Silica Hill Prospect, part of the 100%-owned Commonwealth
Project 100km north of Orange in NSW.
The drill programme will now commence by early December and comprise up to 2,000 metres of
reverse circulation and diamond drilling, of which about 500 metres is expected to be completed before
Christmas with the remainder to be completed in the New Year.
Significant gold and silver mineralisation has been intersected in four drill holes so far at Silica Hill over an
area of 200 metres by 100 metres down to a depth of 100 metres below surface and with an average true
thickness of about 50 metres (Figures 1, 2 and 4). The zone strikes north east and dips steeply to the south
east. Importantly it appears that grade is increasing with depth (Figures 2 and 3).
The mineralisation is open in all directions including up-dip and is terminated by a fault suggesting further
mineralisation may have been offset.
The drill programme is designed to test for extensions to this mineralisation as well as further depth
extensions to the Commonwealth deposit centred about 200 metres south west of Silica Hill (Figure 1).
Figure 1. Surface geology map showing significant drill intercepts at Silica Hill and Main Shaft.
26 Richardson Street West Perth Western Australia 6005
Tel +61 (8) 6454 6666 Facsimile +61 (8) 6454 6667
Email info@impactminerals.com.au www.impactminerals.com.au
About the Gold-Silver Mineralisation at Silica Hill
The mineralisation comprises disseminated sulphide, veins and semi-massive sulphide veins within the
Silica Hill rhyolite. The veins commonly contain high to very high grades of gold and in particular silver.
For example, Hole CMIPT046 returned 30 individual assays of varying widths of between 2 g/t and
24 g/t gold and 12 individual assays with more than 500 g/t silver (Figure 4) and Hole CMIPT011 returned
two veins with 3,146 g/t silver (0.9 metres thick) and 3,600 g/t silver (0.15 m thick).
The four drill holes that have returned significant intercepts on two sections are: CMIPT046 and
CMIPT026 (Figures 1, 2 and 3) and CMIPT043 and CMIPT011 (Figures 2 and 3).
Drill Hole CMIPT046, drilled beneath Hole CMIPT026, returned high grade gold and very high grade
silver over a 41 metre thick intercept within a 74 metre thick zone of gold-silver mineralisation (Figure 4).
Key intercepts include:
74.5 metres at 1.2 g/t gold and 106 g/t silver (2.9 g/t gold equivalent) from 61 metres
including 41.3 metres at 2.0 g/t gold and 176 g/t silver (4.7 g/t gold equivalent) from 61 metres;
which includes 16.3 metres at 3.7 g/t gold and 246 g/t silver (7.6 g/t gold equivalent) from 86 metres.
Gold equivalency calculations are based on the following US dollar prices: Gold $1326/oz; silver and $18.82/oz.
Figure 2. East-West cross section showing results for Holes CMIPT026 and CMIPT046.
Figure 3 shows that the intercept in Hole CMIPT046 includes numerous high grade gold and silver
intercepts from individual veins and groups of veins (which have been sampled in detail) including:
1 metre at 12.2 g/t gold and 680 g/t silver
including 0.3 metres at 23 g/t gold and 1,110 g/t silver;
1 metre at 5.3 g/t gold and 924 g/t silver;
1.7 metres at 3.8 g/t gold and 1,176 g/t silver; and
0.7 metres at 1.5 g/t gold and 855 g/t silver.
Figure 3. Detail of gold and silver assays for Hole
CMIPT046. Note that the gold grades have been cut off at
10 g/t, and silver grades are at log scale to allow proper
visualisation of the grades of up to 10 g/t gold and
1,490 g/t silver.
Hole CMIPT026, drilled up dip from Hole CMIPT043,
returned 39 metres at 0.3 g/t gold and 16 g/t silver from
5 metres down hole with individual one metre assays up to
1 g/t gold and 32 g/t silver (Figure 2).
This part of the hole comprised RC chips and it is not known if
the significant grade variation between holes CMIPT026 and
CMIPT043 is a primary feature or secondary weathering
(leaching effect).
Hole CMIPT011, drilled below Hole CMIPT043, (Figures 1 and 4) returned:
48.6 metres at 0.5 g/t gold and 137 g/t silver (2.5 g/t gold equivalent) from 122 metres.
Including
which includes:
and:
which includes
23 metres at 224 g/t silver (3.6 ounces) and 1.0 g/t gold from 147.7 metres
0.9 metres at 3,146 g/t silver (101 ounces) and 2.4 g/t gold from 148.1 metres;
2.9 metres at 406 g/t silver (13 ounces) and 0.6 g/t gold from 157.6 metres
a 15 cm vein that returned 3,600 g (116 ounces) of silver and 0.4 g/t gold;
and also including: 4 metres at 104 g/t (3.4 ounces) silver and 1.5 g/t gold from 160 metres;
and:
1 metre at 4.7 g/t gold and 23 g/t silver from 169.5 metres.
Figure 4. East-West cross section showing results for Holes CMIPT043 and CMIPT011.
Hole CMIPT043, drilled above Hole CMIPT011, (Figures 1 and 4) returned:
68 metres at 0.5 g/t gold and 43 g/t silver (1.3 g/t gold equivalent) from 99 metres;
including the upper silver-rich zone of 37 metres at 0.1 g/t gold and 71 g/t silver (2.3 ounces) and the
lower gold-rich zone of 18 m at 1.7 g/t gold and 24 g/t silver from 149 metres.
Individual results of note in this hole are:
High grade silver intercepts (with gold) in the upper part of the assayed zone:
1 m at 122 g/t (4 ounces) silver and 0.2 g/t gold from 108 metres;
1 m at 146 g/t silver (5 ounces) and 0.1 g/t gold from 118 metres;
2 m at 373 g/t (12 ounces) silver and 0.2 g/t gold from 123 metres including
1 m at 525 g/t (17 ounces) silver and 0.1 g/t gold from 124 metres; and
1 m at 337 g/t (11 ounces) silver and 0.1 g/t gold and from 134 metres.
Significant gold assays in the lower part of zone:
1 m at 2.3 g/t gold and 64 g/t (2 ounces) silver from 153 metres;
and 1 m at 6.4 g/t gold and 18 g/t silver (0.5 ounces) from 155 metres.
In addition it is evident that there is a large silver “halo” of up to 10 to 15 g/t silver in the Silica Hill rhyolite
which extends further outwards over many hundreds of square metres (Figures 1, 2 and 4). It is possible
that this may be a “leakage halo” from depth and accordingly the down-dip extension of the mineralisation
in Holes CMIPT011 and CMIPT046 are compelling drill targets.
Connection between mineralisation at Main Shaft and Silica Hill
The style and nature of mineralisation in Hole CMIPT043 is similar to that encountered in the rhyolite unit
within the Commonwealth deposit and further demonstrates that the mineralisation at the two prospects is
part of one larger system. It is possible that the mineralisation at Silica Hill and Main Shaft may be linked at
depth. Areas where the two styles of mineralisation may connect will be priority target areas.
A gold-silver-in-soil anomaly extends in a NE direction from Main Shaft to Silica Hill and widens in that
direction. This anomaly is open to the north and north-east. This is a further indication that the two areas
may be linked and further drilling at depth is required.
Very high grade silver values of almost 1 kg/tonne over 1 metre were returned in this drill programme from
Hole CMIPT031 at Main Shaft in a 7 metre thick zone of massive sulphide mineralisation that returned:
7 metres at 6.3 g/t gold, 496 g/t silver (15.9 ounces), 7.2% zinc, 2.9% lead and 0.2% copper
(17.7 g/t gold equivalent) from 91 metres
including 3 metres at 10.6 g/t gold, 571 g/t silver (18.4 ounces), 7.8% zinc, 2.1% lead and
0.2% copper (23.0 g/t gold equivalent) from 92 metres and
also including 1 metre at 2.5 g/t gold, 979 g/t silver (31.5 ounces), 8.3% zinc, 4.4% lead and
0.1% copper (21.4 g/t gold equivalent) from 95 metres
This intercept is open down dip, beneath the silver-rich intercepts at Silica Hill (Figure 1). Further drilling
here will require new drill permits.
Investment by Squadron Resources Pty Limited
The Commonwealth gold-silver-zinc-lead project and also Impact’s Broken Hill platinum-copper-nickel
project are part of the investment agreement between Impact Minerals and Squadron Resources Pty Ltd,
part of the Minderoo Group which represents the philanthropic and business interests of Andrew and Nicola
Forrest (see announcement 17 July 2015).
As part of the investment agreement, Squadron can, at its sole discretion, invest a further A$1 million into
either or both of the projects to earn a 19.9% interest after Impact has spent a combined total of $2.5 million
on them from a total of $3 million of exploration funds provided.
Impact has now met the $2.5 million expenditure target and in accordance with the agreement, Squadron
now has 90 days from 2nd September 2016 to make its additional investment decision.
Dr Michael G Jones
Managing Director
The review of exploration activities and results contained in this report is based on information compiled by Dr Mike Jones, a Member of
the Australian Institute of Geoscientists. He is a director of the company and works for Impact Minerals Limited. He has sufficient
experience which is relevant to the style of mineralisation and types of deposits under consideration and to the activity which he is
undertaking 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 (the JORC Code). Dr Jones has consented to the inclusion in the report of the matters based on his
information in the form and context in which it appears.
Impact Minerals confirms that it is not aware of any new information or data that materially affects the information included in the
previous market announcements referred to and in the case of mineral resource estimates, that all material assumptions and technical
parameters underpinning the estimates continue to apply and have not materially changed.
APPENDIX 1 - SECTION 1 SAMPLING TECHNIQUES AND DATA
Criteria
JORC Code explanation
Commentary
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.
Rock chip samples
Random grab samples were taken at surface which represented favourable geology and alteration to known mineralisation in the
region. Samples are variably weathered.
Soil Samples
About 250g of soil was taken from 15-20cm below surface and sieved to - 2mm size. Samples put in plastic snap seal bags.
Samples were subsequently sieved to -250 micron at SGS Laboratories for assay by aqua regia digest.
RC Drilling
Reverse Circulation (RC) percussion drilling was used to produce a 1m bulk sample (~25kg) which was collected in plastic bags and
representative 1m split samples (12.5%, or nominally 3kg) were collected using a riffle splitter and placed in a calico bag. The
cyclone was cleaned out with compressed air at the end of each hole and periodically during the drilling. Holes were drilled to
optimally intercept interpreted mineralised zones.
Diamond Drilling
Diamond drilling was used to produce drill core either with a diameter of 63.5 mm (HQ) or 47.6 mm (NQ).
Include reference to measures taken to ensure sample
representivity and the appropriate calibration of any
measurement tools or systems used
Rock chip samples
Representative samples at each sample site weigh between 0.8 and 1.2 kg. Sample sites were chosen due to historic rock and soil
assay results and the geophysical surveys conducted on the Commonwealth Project. Historic rock sample methods are unknown
but are considered immaterial.
Soil Samples and Drill Samples
Sample representivity was ensured by a combination of Company Procedures regarding quality control (QC) and quality assurance
/ testing (QA).
Examples of QC include (but are not limited to), daily workplace and equipment inspections, as well as drilling and sampling
procedures.
Examples of QA include (but are not limited to) collection of “field duplicates”, the use of certified standards and blank samples
approximately every 50 samples
Sampling techniques
Criteria
Drilling techniques
Drill sample recovery
JORC Code explanation
Commentary
Aspects of the determination of mineralisation that are Material
to the Public Report. In cases where ‘industry standard’ work has
been done this would be relatively simple (e.g. ‘reverse circulation
drilling was used to obtain 1 m samples from which 3 kg was
pulverised to produce a 30 g charge for fire assay’). In other cases
more explanation may be required, such as where there is coarse
gold that has inherent sampling problems. Unusual commodities
or mineralisation types (e.g. submarine nodules) may warrant
disclosure of detailed information
Rock chip samples
Rock samples were sent to SGS Perth where they were crushed, dried and pulverised (total prep) to produce a 25-30 g subsamples for analysis initially by Aqua Regia digest with ICP-MS finish for base metals then by four acid digest with an ICP/AES
finish for ore grade base metal samples and lead collection fire assay with AAS finish for gold.
Soil Samples
Soil samples were sent to ACME Laboratories in Vancouver for analysis by aqua regia digest or to SGS Laboratories in Perth for
analysis by the MMI digest.
RC and diamond drill samples
RC samples and cut samples of core were submitted to ALS in Orange, NSW. Laboratory sample preparation involved: sample
crushed to 70% less than 2mm, riffle/rotary split off 1 kg, pulverise split to >85% passing 75 microns.
RC samples analysed by MEICP41 or MEOG46 for ore grade samples, aqua region digest with ICP OES analysis and AA24 fire assay
with AAS finish.
Historical diamond and RC samples were sent to Fox Anamet, Brookvale NSW where gold was determined by fire assay, base
metals by DCP and AAS methods.
Weathered samples contained gossanous sulphide material and fresh samples containing visible pyrite, galena, sphalerite and
chalcopyrite.
Drill type (e.g. core, reverse circulation, open-hole hammer, rotary
air blast, auger, Bangka, sonic, etc) and details (e.g. core
diameter, triple or standard tube, depth of diamond tails, facesampling bit or other type, whether core is oriented and if so, by
what method, etc).
Diamond drilling accounts for about 50 % of the drilling and comprises NQ (47.6 mm diameter) and HQ (63.5 mm diameter) sized
core. Impact diamond core is triple tube and is oriented. Historical diamond core was not oriented.
RC drilling accounts for about 50% of the drilling and comprises 4 inch hammer.
Method of recording and assessing core and chip sample
recoveries and results assessed
Diamond core recoveries for all holes are logged and recorded. Recoveries are estimated to be approximately >97% for the
Commonwealth Project. No significant core loss or sample recovery problems are observed in the drill core or historic reports. RC
samples were visually checked for recovery, moisture and contamination.
Measures taken to maximise sample recovery and ensure
representative nature of the samples
Diamond core is reconstructed into continuous runs on an angle iron cradle for orientation marking. Depths are checked against
the depth given on the core blocks and rod counts are routinely carried out by the driller.
The RC samples are collected by plastic bag directly from the rig-mounted cyclone and laid directly on the ground in rows of 10.
The drill cyclone and sample buckets are cleaned between rod-changes and after each hole to minimise down-hole and/or cross
contamination.
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.
No sample bias has been established.
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.
Geological logging of samples followed company and industry common practice. Qualitative logging of samples included (but not
limited to); lithology, mineralogy, alteration, veining and weathering. Diamond core logging included additional fields such as
structure and geotechnical parameters.
Magnetic Susceptibility measurements were taken for each 1m RC sample and each 1m diamond core interval.
For diamond core, information on structure type, dip, dip direction, texture, shape and fill material has been recorded in the logs.
RQD data has been recorded on selected diamond holes. Handheld XRF analysis was completed at 50 cm and 1 m intervals on
diamond core and for every metre for RC samples.
Logging
Criteria
Sub-sampling
techniques and
sample preparation
Quality of assay data
and laboratory tests
Verification of
sampling and assaying
JORC Code explanation
Commentary
Whether logging is qualitative or quantitative in nature. Core (or
costean, channel, etc) photography.
All logging is quantitative, based on visual field estimates. Systematic photography of the diamond core in the wet and dry form
was completed.
Chip trays with representative 1m RC samples were collected and photographed then stored for future reference.
The total length and percentage of the relevant intersections
logged
All diamond drill holes were logged in full.
All RC chips samples were geologically logged by Impact’s on-site geologist on a 1m basis, with digital capture in the field.
Detailed diamond core logging, with digital capture was conducted for 100% of the core by Impact’s on-site geologist.
If core, whether cut or sawn and whether quarter, half or all core
taken.
All core samples were sampled by half core. Selected intervals of quarter core will be selected for check assays if required.
If non-core, whether riffled, tube sampled, rotary split, etc and
whether sampled wet or dry.
RC samples were split using a riffle splitter.
For all sample types, the nature, quality and appropriateness of
the sample preparation technique.
Company procedures were followed to ensure sub-sampling adequacy and consistency. These included (but were not limited to),
daily work place inspections of sampling equipment and practices, as well as sub-sample duplicates (“field duplicates”).
Quality control procedures adopted for all sub-sampling stages to
maximise representivity of samples.
Laboratory QC procedures for rock sample assays involve the use of internal certified reference material as assay standards, along
with blanks, duplicates and replicates.
The QC procedure for historical diamond and RC samples is unknown but considered immaterial.
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.
Sample duplicates from the historical drilling were taken from selected intervals and compared to the original assay. Quarter core
was taken for diamond samples and riffle resplits for RC samples.
Whether sample sizes are appropriate to the grain size of the
material being sampled.
The samples sizes at Commonwealth are considered appropriate since gold has been identified as predominantly fine-grained by
thin section analysis which would indicate the nugget effect is minimal.
The nature, quality and appropriateness of the assaying and
laboratory procedures used and whether the technique is
considered partial or total.
An industry standard fire assay technique for samples using lead collection with an Atomic Absorption Spectrometry (AAS) finish
was used for gold and aqua regia digest for base metals and silver.
The quality of historical drill sample assays is unknown, however this is considered immaterial at this stage of exploration.
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 to determine material element concentrations. A handheld XRF was used for qualitative analysis
only.
Nature of quality control procedures adopted (e.g. standards,
blanks, duplicates, external laboratory checks) and whether
acceptable levels of accuracy (i.e. lack of bias) and precision have
been established.
For the rock chips, quality control procedures for assays were followed via internal laboratory protocols. Accuracy and precision
are within acceptable limits.
The quality control of historical drill sample assays is unknown, however this is considered immaterial at this stage of exploration.
The verification of significant intersections by either independent
or alternative company personnel.
Significant intersections from drilling have not been verified by independent or alternative companies. This is not required at this
stage of exploration.
Criteria
Location of data
points
JORC Code explanation
Commentary
The use of twinned holes.
Two twin diamond holes versus historic RC holes have been drilled at Commonwealth South and Main Shaft.
Documentation of primary data, data entry procedures, data
verification, data storage (physical and electronic) protocols.
Primary assay data for rock chips has been entered into standard Excel templates for plotting in Mapinfo and Target. All historical
drill data has been entered digitally by previous explorers and verified internally by Impact.
Discuss any adjustment to assay data.
No significant adjustments have been required.
Accuracy and quality of surveys used to locate drillholes (collar
and down-hole surveys), trenches, mine workings and other
locations used in Mineral Resource estimation.
Recent drill holes have been located by DGPS. Historical drill holes and mine shafts have been verified by DGPS.
Specification of the grid system used.
The grid system for Commonwealth is MGA_GDA94, Zone 55.
Quality and adequacy of topographic control.
Standard government topographic maps have been used for topographic validation. The DGPS is considered sufficiently accurate
for elevation data.
For the diamond holes, down-hole single shot surveys were conducted by the drilling contractor. Surveys were conducted at 6m,
18, 30m and then approximately every 30m down-hole.
For the RC drill holes, downhole dip surveys were taken at approximately 30m intervals and at the bottom of the hole.
Data spacing for reporting of Exploration Results.
Drill spacing of drill holes ranges between 10 and 30 m which is considered adequate for Exploration Results.
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.
Drill spacing of drill holes ranges between 10 and 50 m and may be considered adequate for Mineral Resource and Ore reserve
estimation procedures. However estimations of grade and tonnes have not yet been made.
Whether sample compositing has been applied.
Sample compositing has been applied for quoting drill composite results only.
Whether the orientation of sampling achieves unbiased sampling
of possible structures and the extent to which this is known,
considering the deposit type.
Drilling is oriented sub-perpendicular to the mineralised trend and stratigraphic contacts as determined by field data and cross
section interpretation.
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 significant sample bias has been identified from drilling due to the optimum drill orientation described above. Where present,
sample bias will be reported.
Sample security
The measures taken to ensure sample security.
For rock samples, chain of custody is managed by Impact Minerals Ltd. Samples for Commonwealth are delivered by Impact
Minerals Ltd personnel to ALS in Orange, NSW or to SGS Perth for prep and assay. Whilst in storage, they are kept in a locked
yard. Tracking sheets have been set up to track the progress of batches of samples.
Security of historic drill samples is unknown however is considered immaterial.
Audits or reviews
The results of any audits or reviews of sampling techniques and
data.
A review of the sampling techniques and data both of historic drill holes and of Impact’s procedures has been completed by
Optiro Consultants of Perth, WA.
Data spacing and
distribution
Orientation of data in
relation to geological
structure
SECTION 2 REPORTING OF EXPLORATION RESULTS
Criteria
Mineral tenement and land
tenure status
Exploration done by other
parties
JORC Code explanation
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 Commonwealth Project currently comprises 3 exploration licences covering 315 km2. The tenements
are held 100% by Endeavour Minerals Pty Ltd, a subsidiary company of Impact Minerals Limited. No
aboriginal sites or places have been declared or recorded in areas where Impact is currently exploring.
There are no national parks over the license area.
The security of the tenure held at the time of reporting along with any
known impediments to obtaining a licence to operate in the area.
The tenements are in good standing with no known impediments.
Acknowledgment and appraisal of exploration by other parties.
A total of 66 drillholes have been completed over 300 m strike between the Commonwealth main shaft
and Commonwealth South by previous explorers to an average depth of 53 m.
Deposit type, geological setting and style of mineralisation.
The Commonwealth and Commonwealth South deposits are considered gold-rich volcanic hosted massive
sulphide (VMS) deposits that occur at and below the contact with a porphyrictic rhyolite and overlying
volcanic sedimentary rocks. The mineralisation may have been overprinted by epithermal mineralisation.
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.
See Table in text.
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.
All reported assays have been length weighted. No top cuts have been applied. A nominal cut-off of
approximately 0.5 g/t Au has been applied.
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.
High grade massive sulphide intervals internal to broader zones of disseminated sulphide mineralisation
are reported as included intervals.
The assumptions used for any reporting of metal equivalent values should
be clearly stated.
Gold equivalent values have been used in the long section. Metal prices used for the gold equivalent
were $1,650 for gold and $30 for silver. Given the high grade results, it is assumed that very high
recoveries will be achieved. However no metallurgical studies have been completed to verify this. Such
studies will be done as and when appropriate.
Geology
Drill hole Information
Data aggregation methods
Commentary
Criteria
JORC Code explanation
Commentary
Relationship between
mineralisation widths and
intercept lengths
These relationships are particularly important in the reporting of
Exploration Results.
If the geometry of the mineralisation with respect to the drill hole angle is
known, its nature should be reported.
If it is not known and only the down hole lengths are reported, there should
be a clear statement to this effect (e.g. ‘down hole length, true width not
known’).
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 in body of text.
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.
All results reported are representative
Balanced reporting
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.
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).
Diagrams clearly highlighting the areas of possible extensions, including the
main geological interpretations and future drilling areas, provided this
information is not commercially sensitive
Historical drill holes to date have been sub-perpendicular to the mineralised trend and stratigraphy so
intervals are close to true width or otherwise stated.
Assessment of other substantive exploration da
Share your feedback
Discover