Further High Grade Results at Silica Hill
Released
Released
Announcement PDF
ASX ANNOUNCEMENT
Date: 21 September 2017
Number: 545/250817
FURTHER HIGH GRADE RESULTS AT SILICA HILL
Further drill assays from the on-going drill programme at Impact Minerals Limited’s (ASX:IPT)
emerging gold-silver discovery at the Silica Hill Prospect, part of the 100% owned Commonwealth
Project 100 km north of Orange in New South Wales, continue to confirm and expand the bulk-tonnage
potential close to the near-surface high grade massive sulphide resource at Main Shaft, with only 10% of
the target area tested to date close to surface.
In addition the closed spaced drilling completed to date has elucidated further important structural
controls on high grade shoots as well as the broad vertical and lateral metal zonation within the
stockwork vein system (Figures 1 and 2).
East-west trending structures have now been identified as an important control of the high grade zones
and shoots within the overall north east trending zone of mineralisation, and it has been shown that the
entire vertical extent of the mineralised system has been preserved from an upper barren silica-pyrite
zone that passes progressively down and laterally through low grade silver +/- gold veins; higher grade
gold and silver veins; and a lower zinc-lead-copper zone containing “feeder veins” of massive base
metal sulphides that also have high grade gold and silver in places.
Hole CMIPT063 has returned:
98 metres at 0.7 g/t gold and 53 g/t silver (1.5 g/t gold equivalent) from 58 metres down hole
including
31 metres at 1.3 g/t and 70 g/t silver (2.2 g/t gold equivalent) from 58 m down hole which includes;
0.6 metres at 0.8 g/t gold and 2,090 g/t silver and 0.2% zinc (28.5 g/t gold equivalent) from 85.4 m;
and
0.3 metres at 6.2 g/t gold, 149 g/t silver, 8.4% zinc, 3.9% lead and 0.2% copper (16.5 g/t gold
equivalent – “feeder vein” – see announcement 4th August 2017);
and
10 metres at 0.5 g/t gold and 232 g/t silver (4.1 g/t gold equivalent) from 146 m which includes:
1 metre at 0.7 g/t gold and 1,285 g/t silver (18.8 g/t gold equivalent) from 150 metres;
and
1.2 metres at 0.3 g/t gold, 37 g/t silver, 1.6% zinc, 1.1% lead and 0.1% copper
(2.6 g/t gold equivalent) from 166.8 metres
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
>0.5 g/t gold equivalent
>1 g/t gold equivalent
Figure 1. Overview of the Silica Hill Prospect showing drill hole locations and east-west trending goldrich zones within a north east trending corridor defined by a gold-silver-molybdenum-in-soil anomaly.
Note that the drilling has only tested the near surface portion of 10% of the target area.
Drill hole 63 was drilled above CMIPT060, an RC hole that failed to reach depth and ended in
mineralisation at 88 metres and which returned:
37 metres at 1.0 g/t gold and 31 g/t silver (1.4 g/t gold equivalent) from 51 metres.
Drill holes CMIPT64 and 65 were also drilled above Hole 60 and intersected stockworks of narrow
veins as previously reported. These holes were sampled at practical sample widths of about 1 metre and
have returned significant widths of anomalous gold and silver assays showing that they are part of the
upper lower grade silver+/- gold part zone of the system.
Hole 64 returned 84 metres at 0.3 g/t gold and 18 g/t silver and hole 65 returned 62 metres at 0.5 g/t
gold and 17 g/t silver, with individual one metre samples returning up to 75 g/t silver.
Drill hole CMIPT071 is in progress to test below these strongly anomalous intercepts to test the lower
gold-rich zone and also in particular to also test down dip extension of the high grade base metal
massive sulphide veins in Hole 63.
Hole 61 also intersected a zone of narrow veins with silver and returned 10 metres at 86 g/t silver. This
hole is interpeted to have been drilled between two east-west structures as detailed below.
Further assays are expected within three weeks.
Discussion
An intial interpretation of these results combined with detailed logging of the diamond core, shows that
the overall north east trending corridor of mineralisation at Silica Hill is resolving into several
mineralised domains related to east-west trending, steeply south dipping structures (Figure 1). The
intersection of the east-west and north east trending structures appears to be a strong control on the
higher grade portions and shoots of the mineralised system.
At least two east-west structures have been identified, each over at least 400 metres of strike and both
open along trend and at depth.
One structure occurs along the southern contact of the Silica Hill rhyolite and includes the high grade
assays from Holes 43 and 11 (e.g. 23 metres at 1 g/t gold and 224 g/t silver including 0.9 metres at 2.4
g/t gold and 3,146 g/t silver - see announcement 22 February 2017 for details).
A second east west structure occurs 50 m to 75 m to the north and is defined in part by extensive low
grade molybdenum with lesser tin and shown as the “molybdenum corridor” on Figure 1. The metal
assemblage is interpreted as futher evidence that the mineralising fluids may be sourced from a late
stage intrusive at depth. Further drilling will also test these structures along trend and at depth.
Figure 2. Cross section looking north west from Main Shaft to the south and Silica Hill to the north (see
Figure 1 for location). Three components to the mineralised system are evident: an upper zone of
weakly mineralised gold-silver veins; a middle zone of high grade gold-silver +/- base metal veins and a
lower zone of massive sulphide and increasing copper-gold-silver at depth.
Drilling to date at Silica Hill has only tested 10% of the combined soil-geochemical and IP geophysical
target area. Larger spaced step out drilling is now being planned and a second RC rig is being sourced to
help expedite the programme. This work will also include testing beneath Hole 51 which intersected a
variably developed stockwork of narrow quartz-sulphide veins with anomalous silver and gold over the
entire 270 metre length of the drill hole with three better developed zones 25 metres, 50 metres and
30 metres thick (Figures 1 and 2).
Together, these results and previous work demonstrate a mineralised system that extends over at least
700 metres of strike and a vertical extent of at least 400 metres (Figure 2). The drill programme is ongoing and will continue to test this very large system which clearly has the potential to host a major
deposit.
About the Drill Programme
A total of 21 drill holes for 3,432 metres have been completed in this phase of drilling and comprising
11 diamond holes for 2,321 metres and 10 Reverse Circulation (RC) holes for 1,111 metres.
Two more diamond drill holes are planned before the drill rig will be converted to a multi-purpose rig to
allow it to also drill by reverse circulation (RC). This will take about four weeks and occur in October.
A second RC rig, which has to be small and/or track mounted because of the terrain, is also being
sourced.
As previously announced, a previous RC drill rig did not perform to standard and was removed from
site. In particular the drill holes deviated significantly from the planned orientation and accordingly four
drill holes were abandoned, mostly at the drill company’s cost.
About the Commonwealth Project
The Commonwealth Project forms part of Impact’s extensive 100% owned land holding of 1,000 sq km
in the Lachlan Foldbelt, home to numerous gold and copper mines including the giant Cadia deposit
near Orange (40 million ounces of gold and 12 million tonnes of copper).
At Silica Hill significant gold and silver mineralisation covers an area of 200 metres by 100 metres
down to a depth of 120 metres below surface and with an average true thickness of at least between 40
metres and 70 metres. The mineralisation is open in all directions including up dip.
Four drill holes have also returned gram-times-metre intercepts of more than 100 gram.metres and a
fifth hole returned an intercept of greater than 50 gram.metres. These are robust and significant results
for potential bulk mining and indicate the potential to significantly increase the resources at the
Commonwealth Project, which currently stand at 720,000 tonnes at 2.8 g/t gold, 48 g/t silver, 1.5% zinc
and 0.6% lead (see announcement 19 February 2015).
In detail, these thick widths of mineralisation actually comprise numerous narrow veins and vein
stockworks of high grade gold and very high grade silver hosted by the Silica Hill rhyolite that contain
lower grade disseminated gold and silver.
For example, Hole CMIPT046 returned an intercept of
41 metres at 2 g/t and 176 g/t silver from 61 metres including 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 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.
(see announcements dated 5th December 2016 and 22nd February 2017).
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.
DRILL HOLE DATA FOR 2017 DRILL PROGRAMME
Hole_ID
CMIPT050
CMIPT051
CMIPT052
CMIPT053
CMIPT054
CMIPT055
CMIPT056
CMIPT057
CMIPT058
CMIPT059
CMIPT060
CMIPT061
CMIPT062
CMIPT063
CMIPT064
CMIPT065
CMIPT066
CMIPT067
Hole_Type Max_Depth
DDH
356.6
DDH
271.9
RC
149
RC
141
RC
81
RC
96
RC
174
RC Abnd
60
RC
198
RC Abnd
60
RC Abnd
93
DDH
170
RC Abnd
59
DDH
199
DDH
252
DDH
159
DDH
177
DDH
152
CMIPT068
CMIPT069
CMIPT070
CMIPT071
DDH
DDH
DDH
DDH
East
692342
692436
693659
693537
693536
692250
692381
692412
692412
692388
692389
692343
692390
692388
692388
692390
692392
692339
North
6393009
6393318
6393306
6393317
6393320
6392810
6393020
6393020
6393019
6393020
6393020
6393009
6393021
6393021
6393022
6393021
6393021
6393011
RL
Dip Azimuth Prospect
391 -57
230.3 Main Shaft
551 -47
200.3 Silica Hill
475 -47
275 Welcome Jack
498 -75
270 Welcome Jack
498 -70
110 Welcome Jack
341 -65
310 Main Shaft
404 -55
270 Silica Hill
405 -70
250 Silica Hill
405 -80
245 Silica Hill
402 -70
320 Silica Hill
402 -75
322 Silica Hill
391 -52
284 Silica Hill
403 -75
346 Silica Hill
402 -70
300 Silica Hill
402 -70
330 Silica Hill
403 -55
220 Silica Hill
403 -70
355 Silica Hill
391 -60
25 Silica Hill
Main Shaft
250 692139 6393064 384 -65
245 North
171 692393 6393022 403 -45
320 Silica Hill
162 692340 6393012 391 -45
280 Silica Hill
In progress
Silica Hill
SIGNIFICANT ASSAYS FOR HOLES REPORTED
Hole Id
From
To
Interval
Au
PPM
Ag
PPM
Zn
PPM
Pb
PPM
Cu
PPM
Au Eq g/t*
Cutoff
CMIPT058
61
108
66
146
5
38
0.04
0.03
24
16
213
107
NSA
NSA
NSA
NSA
CMIPT059
56
60
4
1.63
11
1261
NSA
NSA
1.80
0.5 g/t AuEq
CMIPT060
51
88
37
1.03
31
457
156
NSA
1.44
0.5 g/t AuEq
CMIPT061
52.8
154
63
155
10.2
1
0.08
1.71
86
30
NSA
NSA
NSA
NSA
NSA
NSA
1.62
2.10
0.5 g/t AuEq
1 g/t AuEq
CMIPT062
48
59
11
0.18
14
230
NSA
NSA
0.40
0.2 g/t AuEq
CMIPT063
including
including
also including
including
also including
including
58
58
85.4
100.5
114.35
146
150
166.8
156
89
86
118
114.65
156
151
169
98
31
0.6
17.5
0.3
10
1
1.2
0.66
1.27
0.81
0.82
6.22
0.53
0.66
0.32
53
70
2090
14
149
232
1285
37
1761
507
1800
2770
84200
4442
8270
16587
972
185
411
1440
39200
2700
9220
11052
104
NSA
154
101
1740
380
868
1262
1.55
2.20
28.50
1.28
16.54
4.09
18.81
2.62
0.5 g/t AuEq
1 g/t AuEq
1000 g/t Ag
1 g/t AuEq
5 g/t Au
1 g/t AuEq
1000 g/t Ag
1% Zn
CMIPT064
including
47
57.5
131
82
84
24.5
0.30
0.68
18
15
341
659
NSA
NSA
NSA
NSA
0.54
0.88
0.5 g/t AuEq
0.5 g/t Au
CMIPT065
including
48
48
110
65
62
17
0.45
1.21
17
16
390
1068
NSA
237
NSA
NSA
0.68
1.42
0.5 g/t AuEq
0.5 g/t Au
10 g/t Ag*
10 g/t Ag*
Gold equivalent calculations are based on the following metal prices in US Dollars:
Gold $1320/oz; Silver $17.30/oz; zinc 1.40/lb; lead $1.07/lb; copper $2.90/lb.
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).
Hand-held XRF
Handheld XRF analysis was completed with an Olympus INNOV-X 40Kev RAP Geochem Analyser instrument at 50 cm and 1 m
intervals on diamond core and for every metre for RC samples. For individual veins or samples that are specifically reported,
several readings are taken to establish an average. Investors should note that the analyses are semi-quantitative and are a guide
only to the metal content. Laboratory assays are used in preference where available.
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.
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 re-splits 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 Olympus Innov-X XRF 40KeV
instrument was used for semi-quantitative analysis only. The sampling interval was two times 20 second intervals. Calibration is
carried out at the start of the sampling procedure each time the machine is turned on and appropriate standards are used every
25th sample. Elements analysed include:Ag, As, Se, Ca, K, S, Sb, Sn, Cd, Sr, Rb, Pb, Hg, W, Cu, Ni, Co, V, Ti, Fe, Mn, P, Cr, Mo, U and
Ta.
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 volcan
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