Westgold Declares Maiden South Junction Ore Reserve
Released
Released
Announcement PDF
ASX Announcement
14 August 2024
Westgold Declares Maiden South Junction Ore Reserve
Bluebird-South Junction expands to 1.2Mtpa run rate from Q3 FY25
Westgold Resources Limited (ASX: WGX, TSX: WGX, OTCQX: WGXRF – Westgold or the
Company) is pleased to present the maiden Ore Reserve for its South Junction mine. South
Junction is a part of a broader Bluebird - South Junction mining complex which is becoming the
primary ore source for the Bluebird processing hub at Meekatharra with a 1.2Mtpa run rate
targeted from Q3, FY25.
Highlights
Bluebird – South Junction Ore Reserve increases to 3.0Mt @ 2.8g/t Au for 277koz
■
233% increase (+158koz) from the FY23 Ore Reserve post depletion.
■
Contribution from the maiden South Junction Ore Reserve of 2.6Mt @ 2.7g/t Au
for 225koz.
Updated Bluebird – South Junction Mineral Resource exceeds Interim Mineral
Resource announced in March 2024 by a further 130koz post depletion of 14koz
■
61% increase in Indicated Resources.
■
Ore Reserve underwritten by updated Mineral Resource Estimate (MRE) of 11Mt @
2.8g/t Au for 960koz featuring a Measured and Indicated component of 4.7Mt @
3.1g/t Au for 465koz Au.
Further Resource conversion targeted with substantial drilling program ongoing
■
2 x surface rigs and 2 x underground drill rigs continue to extend and infill the
Bluebird – South Junction Mineral Resource.
■
South Junction remains open at depth and to the south along strike/down plunge.
Production from South Junction to commence in August
■
The significant width of the South Junction orebody enables a highly productive
primary / secondary transverse stoping method which will significantly increase
production from the Bluebird – South Junction system.
■
Production rate of 1.2Mtpa – from Bluebird-South Junction targeted from Q3 FY25.
Westgold Resources Limited
ABN 60 009 260 306
ASX:WGX / TSX:WGX / OTC:WGXRF
westgold.com.au
T: +61 8 9462 3400
E: perth.reception@westgold.com.au
Level 6, 200 St Georges Terrace
Perth WA 6000
PO Box 7068, Cloisters Square WA 6850
Westgold Managing Director and CEO Wayne Bramwell commented:
“Westgold is rapidly building a mine of significant scale and life at Meekatharra. The maiden Ore
Reserve for South Junction and the rapid expansion of the Bluebird-South Junction mining
complex to a 1.2Mtpa run rate by Q3, FY25 has been a remarkable success story and underpins
the value in drilling.
A larger, more productive Bluebird-South Junction underground mine is a game changer for our
Murchison business. It will reduce the requirement and cost of road haulage of ore from Cue
(circa 140km) as the Bluebird-South Junction complex is within 2km of the nearby Bluebird mill.
Westgold will continue to invest in drilling across our portfolio in FY25. With Bluebird-South
Junction and Big Bell in the Murchison, buttressed by the expanding Beta Hunt in the Goldfields,
we continue to build a diversified platform that can produce more consistent and sustainable
long term cashflows and returns to our shareholders.”
Figure 1 - Bluebird – South Junction underground complex showing footprint of current Ore Reserve
Westgold Declares Maiden South Junction Ore Reserve
14 August 2024
2
South Junction – production online in August, due to lift rates from Q3
FY25
Westgold’s pipeline of organic growth targets is extensive. South Junction at Meekatharra was
identified as a priority growth opportunity following the results of initial drill testing of the project
in early 20231. A significant drilling program was initiated in January 2024 aimed at extending and
infilling South Junction. This program continues, with two rigs active on surface and two in the
underground environment.
Westgold recognised the vast scale of South Junction, prompting the undertaking of an interim
MRE2 to expedite mine planning studies. Since March, drilling to increase the confidence in the
Inferred portion of the MRE has progressed in parallel with mine planning studies. The results of
this drilling have enabled Westgold to undertake an update to the MRE that has seen the
substantial conversion of Inferred material to Indicated (See Table 1 and Figure 2). This update
includes 14koz of depletion from three months of production on the Bluebird side of the mine.
Interim March 2024 MRE
Grade
Tonnes
(g/t Au)
Ounces
Tonnes
Measured
302,000
4.4
43,000
304,000
4.1
40,000
Indicated
2,872,000
2.9
264,000
4,368,000
3.0
425,000
Inferred
5,844,000
2.8
520,000
6,032,000
2.6
495,000
Total
9,017,000
2.9
827,000
10,705,000
2.8
960,000
Classification
August 2024 MRE
Grade
(g/t Au)
Ounces
Table 1 – Bluebird - South Junction MRE August 2024 (reported above 1.5g/t Au).3
Figure 2 – Substantial growth and improvement in MRE quality between Interim and August 2024
1
Refer ASX Release titled “Bluebird Expansion and Drilling Update - 11 January 2023”
2
Refer ASX Release entitled “Bluebird-South Junction Increases to 6.4Mt at 3.1 g/t Au- 16 April 2023”
3
Interim March 2024 MRE as at 31 March 2024 and August 2024 MRE as at 30 June 2024
Westgold Declares Maiden South Junction Ore Reserve
14 August 2024
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Subsequent mine planning and commercial evaluation works have resulted in an updated Ore
Reserve being declared for the Bluebird – South Junction mine (Table 2). The contribution to this
overall Ore Reserve from the Maiden South Junction Ore Reserve subset is presented in Table 3.
Classification
Proven
Probable
Total
Tonnes
76,600
Grade
(g/t Au)
3.9
Ounces
9,400
2,966,500
2.8
268,000
3,041,000
2.8
277,000
Table 2 – Bluebird - South Junction Ore Reserve August 2024
Classification
Proven
Probable
Total
Tonnes
26,300
Grade
(g/t Au)
3.1
Ounces
2,600
2,612,000
2.7
223,000
2,638,000
2.7
226,000
Table 3 –South Junction Maiden Ore Reserve August 2024
In the South Junction area, this Ore Reserve will be exploited via a change in mining method from
the centre-access retreat Longhole Open Stoping currently employed in the Bluebird area of the
mine, to a highly productive primary / secondary transverse stoping method with fill. This change
in method will enable the production rates of Bluebird – South Junction to increase to more than
triple from the current rate of +30kt per month (refer ASX – Westgold March 2024 Quarterly
Report) to rates of 100kt per month from Q3 FY25.
Figure 3 – Visible gold in recent South Junction drilling
Westgold Declares Maiden South Junction Ore Reserve
14 August 2024
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Mining in South Junction is scheduled to commence in August.
Production rates at South Junction will rapidly increase over the coming months. This ramp up is
a function of the increased scale of the South Junction lodes (as compared to the Bluebird lodes)
which accommodates a more productive mine layout and extraction sequence. (see Figure 4
which depicts the vast difference in scale compared a typical Bluebird stope)
Figure 4 – South Junction schematic mine layout showing the scale of a typical South Junction
stoping panel as compared to a typical stoping panel of the current Bluebird mine (Refer Appendix B
for detailed drill results)
Westgold Declares Maiden South Junction Ore Reserve
14 August 2024
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Looking Forward
Westgold’s corporate strategy is to continue to simplify our business by making our biggest
mines bigger and focusing on grade. The expansion of the Bluebird underground to include new
mining fronts from South Junction is consistent with this plan.
Drilling activities continue to expand the Bluebird – South Junction system and increase Mineral
Resource confidence. This continued drilling will ultimately underwrite future updates to the
MRE and Ore Reserve. The orebody remains open at depth and to the south along strike/down
plunge, as can be seen in Figure 1.
Necessary capital projects to enable the larger mine to function effectively are progressively
being scoped and delivered, with power, ventilation and backfill solutions well defined. Westgold
looks forward to providing updates on its progress at Bluebird – South Junction over the coming
months.
Figure 5 – Long Hole rig drilling the first South Junction stope
This announcement is authorised for release to the ASX by the Board.
Investor and media relations enquiries
Investor Relations
Kasun Liyanaarachchi | Investor Relations Manager
investor.relations@westgold.com.au
+61 458 564 483
Westgold Declares Maiden South Junction Ore Reserve
14 August 2024
Media
Peter Knight | Communications Manager
peter.knight@westgold.com.au
+61 459 980 481
6
Competent/Qualified Person Statements
Exploration Results and Mineral Resource Estimates
The information in this release that relates to Exploration results and Mineral Resource Estimates is
compiled by Westgold technical employees and contractors under the supervision of Mr. Jake Russell
B.Sc. (Hons), who is a member of the Australian Institute of Geoscientists and who has verified, reviewed
and approved such information. Mr Russell is a full-time employee of the Company and has sufficient
experience which is relevant to the styles of mineralisation and types of deposit under consideration and
to the activities 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”) and as a Qualified Person as defined in the CIM Guidelines and National Instrument 43-101
– Standards of Disclosure for Mineral Projects (“NI 43-101”). Mr. Russell is an employee of the Company
and, accordingly, is not independent for purposes of NI 43-101. Mr Russell consents to and approves the
inclusion in this release of the matters based on his information in the form and context in which it appears.
Mr Russell is eligible to participate in short- and long-term incentive plans of the company.
The updated MRE has an effective date of 30 June 2024 and was completed by Westgold technical
employees and contractors under the supervision of Mr Jake Russell. The key inputs and assumptions are
provided in Appendix C to this release including Section 1 – Sampling Techniques and Data, Section 2 –
Reporting of Exploration Results, Section 3 – Estimation and Reporting of Mineral Resources and Section
4 – Estimation and Reporting of Ore Reserves.
Ore Reserves
The information in this release that relates to Ore Reserve is based on information compiled by Mr. Leigh
Devlin B.Eng. FAusIMM, who has verified, reviewed and approved such information. Mr. Devlin has
sufficient experience which is relevant to the styles of mineralisation and types of deposit under
consideration and to the activities which they are undertaking to qualify as a Competent Person as defined
in the JORC Code and as a Qualified Person as defined in the CIM Guidelines and NI 43-101. Mr. Devlin is
an employee of the Company and, accordingly, is not independent for purposes of NI 43-101. Mr. Devlin
consents to and approves the inclusion in this release of the matters based on his information in the form
and context in which it appears. Mr. Devlin is a full-time senior executive of the Company and is eligible to
and may participate in short-term and long-term incentive plans of the Company as disclosed in its annual
reports and disclosure documents.
General
Mineral Resources, Ore Reserve Estimates and Exploration Targets and Results are calculated in
accordance with the JORC Code. The other technical and scientific information in this release has been
prepared in accordance with the Canadian regulatory requirements set out in NI 43-101 and has been
reviewed on behalf of the company by Qualified Persons, as set forth above.
This release contains references to estimates of Mineral Resources and Ore Reserves. The estimation of
Mineral Resources is inherently uncertain and involves subjective judgments about many relevant
factors. Mineral Resources that are not Ore Reserves do not have demonstrated economic viability. The
accuracy of any such estimates is a function of the quantity and quality of available data, and of the
assumptions made and judgments used in engineering and geological interpretation, which may prove
to be unreliable and depend, to a certain extent, upon the analysis of drilling results and statistical
inferences that may ultimately prove to be inaccurate. Mineral Resource estimates may require reestimation based on, among other things: (i) fluctuations in the price of gold; (ii) results of drilling; (iii)
Westgold Declares Maiden South Junction Ore Reserve
14 August 2024
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results of metallurgical testing, process and other studies; (iv) changes to proposed mine plans; (v) the
evaluation of mine plans subsequent to the date of any estimates; and (vi) the possible failure to receive
required permits, approvals and licenses.
The NI 43-101 technical report supporting the Maiden Ore Reserve contained in this release will be filed
on SEDAR+ within the next 45 days of the date of this release. Reference should be made to the full text
of the technical report for the assumptions, qualifications and limitations relating thereto.
Forward looking statements
These materials prepared by Westgold Resources Limited include forward looking statements. Often,
but not always, forward looking statements can generally be identified by the use of forward looking
words such as “may”, “will”, “expect”, “intend”, “believe”, “forecast”, “predict”, “plan”, “estimate”,
“anticipate”, “continue”, and “guidance”, or other similar words and may include, without limitation,
statements regarding plans, strategies and objectives of management, anticipated production or
construction commencement dates and expected costs or production outputs.
Forward looking statements inherently involve known and unknown risks, uncertainties and other factors
that may cause the Company’s actual results, performance and achievements to differ materially from
any future results, performance or achievements. Relevant factors may include, but are not limited to,
changes in commodity prices, foreign exchange fluctuations and general economic conditions,
increased costs and demand for production inputs, the speculative nature of exploration and project
development, including the risks of obtaining necessary licenses and permits and diminishing quantities
or grades of reserves, political and social risks, changes to the regulatory framework within which the
Company operates or may in the future operate, environmental conditions including extreme weather
conditions, recruitment and retention of personnel, industrial relations issues and litigation.
Forward looking statements are based on the Company and its management’s good faith assumptions
relating to the financial, market, regulatory and other relevant environments that will exist and affect the
Company’s business and operations in the future. The Company does not give any assurance that the
assumptions on which forward looking statements are based will prove to be correct, or that the
Company’s business or operations will not be affected in any material manner by these or other factors
not foreseen or foreseeable by the Company or management or beyond the Company’s control.
Although the Company attempts and has attempted to identify factors that would cause actual actions,
events or results to differ materially from those disclosed in forward looking statements, there may be
other factors that could cause actual results, performance, achievements or events not to be as
anticipated, estimated or intended, and many events are beyond the reasonable control of the Company.
In addition, the Company’s actual results could differ materially from those anticipated in these forward
looking statements as a result of the factors outlined in the “Risk Factors” section of the Company’s
continuous disclosure filings available on SEDAR+ or the ASX, including, in the Company’s current
annual report, half year report or most recent management discussion and analysis.
Accordingly, readers are cautioned not to place undue reliance on forward looking statements. Forward
looking statements in these materials speak only at the date of issue. Subject to any continuing
obligations under applicable law or any relevant stock exchange listing rules, in providing this
information the Company does not undertake any obligation to publicly update or revise any of the
forward-looking statements or to advise of any change in events, conditions or circumstances.
Westgold Declares Maiden South Junction Ore Reserve
14 August 2024
8
Appendix A
History of South Junction
Mineralisation was discovered at South Junction in mid-1989 by St Barbara Mining. South
Junction was subsequently mined as an open pit from June 1990 through to the early 2000’s.
Total gold production for the open pit phase of operation at South Junction was in excess of
400,000 ounces. However, since open pit mining concluded activity at South Junction has
effectively been dormant.
To the immediate north of South Junction, the Bluebird deposit has been mined at various stages.
This mining was dominated by small scale underground mining operations and open pits until
the turn of the century after which St Barbara, Mercator Gold and Reed Resources mined 485,000
ounces between 2000 – 2013 via substantial open pit operations.
Figure 6 – Yaloginda gold camp is absent deep drilling outside of Bluebird – South Junction
In late 2019, Westgold commenced underground operations at Bluebird which subsequently
produced over 137koz of gold. This brings the total recorded Bluebird production to 784koz and
the combined Bluebird – South Junction production to 1.18Moz. Combining this with the Mineral
Resource remaining, Bluebird – South Junction can be considered a +2Moz system.
South Junction hosts numerous mineralised zones broadly located on sub-parallel northnortheast-trending structures. These zones from west to east are: Edin Hope, South Junction,
Polar Star and Archenar. These zones are offset from the East, Central and Western lodes at
Bluebird, with the interaction between the two poorly understood due to a lack of drilling.
Westgold Declares Maiden South Junction Ore Reserve
14 August 2024
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Murchison Overview
Westgold’s Murchison Operations incorporates four underground mines, three processing
plants and the Great Fingall development project near Cue. Westgold’s Bluebird processing hub
is the largest of our three Murchison processing hubs and is located approximately 15km
southwest of Meekatharra (see Figure 7).
The Bluebird underground mine is the primary ore source feeding the 1.4-1.8Mtpa Bluebird
processing plant. Surface stockpiles and supplementary ore from Cue is trucked to Bluebird to
maintain processing throughputs, with these volumes reducing as the Bluebird-South Junction
mine expands.
Figure 7 – Westgold’s Murchison Asset Map
Westgold Declares Maiden South Junction Ore Reserve
14 August 2024
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APPENDIX B – Drill Results Included In This Release4
Hole
24BLDD064
24BLDD066
Azi
7,043,673
-47
101
-53
113
7,043,673
641,491
641,491
100
100
3.07m at 2.30g/t Au
15
1m at 6.37g/t Au
41
31.37m at 5.55g/t Au
122
15.5m at 4.62g/t Au
158
4.6m at 3.79g/t Au
21
22.8m at 1.25g/t Au
173
15.82m at 3.09g/t Au
210
18.9m at 3.65g/t Au
293
24BLDD095
7,043,757
641,489
96
9.25m at 3.79g/t Au
122
-22
67
24SJDD001
7043454
641917
468
10.45m at 3.80g/t Au
788
-79
302
3.98m at 10.80g/t Au
894.49
3.75m at 3.01g/t Au
560
-48
292
9.45m at 2.54g/t Au
573.85
3.29m at 3.28g/t Au
588.53
12.70m at 8.57g/t Au
415.58
-53
296
8.03m at 1.58g/t Au
543.44
-52
296
-59
293
-59
284
-65
294
24SJDD004
24SJDD010
24SJDD012
24SJDD015
24SJDD019_W1
24SJDD021_W2
4
Collar N Collar E Collar RL Intercept (Downhole) From (m) Dip
7043417
7043417
7043411
7043411
7043410
7043405
641924
641925
641923
641923
641925
641939
468
467
467
467
4.00m at 3.81g/t Au
637
2.00m at 6.72g/t Au
418
7.90m at 5.20g/t Au
592.5
6.80m at 3.87g/t Au
600.9
3.68m at 4.55g/t Au
619.87
3.00m at 4.54g/t Au
482
3.00m at 12.91g/t Au
531.7
8.10m at 4.31g/t Au
656
2.21m at 17.30g/t Au
696.79
6.27m at 3.76g/t Au
641.42
2.62m at 4.26g/t Au
648.53
5.79m at 2.39g/t Au
541.71
4.70m at 4.58g/t Au
550.3
20.94m at 6.74g/t Au
681.86
INC 4.68m at 16.48g/t Au
687
467
467
Refer to Westgold’s Q2 FY24, Q3 FY24 and Q4 FY24 Quarterly Reports on ASX for full South Junction drill results
Westgold Declares Maiden South Junction Ore Reserve
14 August 2024
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APPENDIX C – JORC 2012 TABLE 1 – GOLD DIVISION
SECTION 1: SAMPLING TECHNIQUES AND DATA
(Criteria in this section apply to all succeeding sections.)
Criteria
Sampling techniques
JORC Code Explanation
Commentary
•
•
Diamond Drilling
A significant portion of the data used in resource calculations has been gathered from diamond
core. Multiple sizes have been used historically. This core is geologically logged and subsequently
halved for sampling. Grade control holes may be whole-cored to streamline the core handling
process if required.
•
•
•
•
•
Drilling 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.
Include reference to measures taken to ensure sample
representivity and the appropriate calibration of any measurement
tools or systems used.
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.
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, face-sampling bit or
other type, whether core is oriented and if so, by what method, etc.).
Method of recording and assessing core and chip sample recoveries
and results assessed.
Measures taken to maximise sample recovery and ensure
representative nature of the samples.
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.
Drill sample recovery
•
Face Sampling
At each of the major past and current underground producers, each development face / round is
horizontally chip sampled. The sampling intervals are domained by geological constraints (e.g. rock
type, veining and alteration / sulphidation etc.). The majority of exposures within the orebody are
sampled.
•
Sludge Drilling
Sludge drilling at is performed with an underground production drill rig. It is an open hole drilling
method using water as the flushing medium, with a 64mm (nominal) hole diameter. Sample
intervals are ostensibly the length of the drill steel. Holes are drilled at sufficient angles to allow
flushing of the hole with water following each interval to prevent contamination. Sludge drilling is
not used to inform resource models.
•
RC Drilling
Drill cuttings are extracted from the RC return via cyclone. The underflow from each interval is
transferred via bucket to a four-tiered riffle splitter, delivering approximately three kilograms of the
recovered material into calico bags for analysis. The residual material is retained on the ground near
the hole. Composite samples are obtained from the residue material for initial analysis, with the
split samples remaining with the individual residual piles until required for re-split analysis or
eventual disposal.
•
RAB / Aircore Drilling
Combined scoops from bucket dumps from cyclone for composite. Split samples taken from
individual bucket dumps via scoop. RAB holes are not included in the resource estimate.
•
Blast Hole Drilling
Cuttings sampled via splitter tray per individual drill rod. Blast holes not included in the resource
estimate.
All geology input is logged and validated by the relevant area geologists, incorporated into this is
assessment of sample recovery. No defined relationship exists between sample recovery and
grade. Nor has sample bias due to preferential loss or gain of fine or coarse material been noted.
Westgold Declares Maiden South Junction Ore Reserve
14 August 2024
12
Criteria
Logging
JORC Code Explanation
Commentary
•
•
•
•
Sub-sampling techniques
and sample preparation
•
•
•
•
•
•
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.
Whether logging is qualitative or quantitative in nature. Core (or
costean, channel, etc.) photography.
The total length and percentage of the relevant intersections logged
If core, whether cut or sawn and whether quarter, half or all core
taken.
If non-core, whether riffled, tube sampled, rotary split, etc. and
whether sampled wet or dry.
For all sample types, the nature, quality and appropriateness of the
sample preparation technique.
Quality control procedures adopted for all sub-sampling stages to
maximise representivity of samples.
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.
Whether sample sizes are appropriate to the grain size of the
material being sampled.
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
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.
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.
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.
Westgold Declares Maiden South Junction Ore Reserve
14 August 2024
•
•
•
Westgold surface drill-holes are all orientated and have been logged in detail for geology,
veining, alteration, mineralisation and orientated structure. Westgold underground drillholes are logged in detail for geology, veining, alteration, mineralisation and structure. Core
has been logged in enough detail to allow for the relevant mineral resource estimation
techniques to be employed.
Surface core is photographed both wet and dry and underground core is photographed wet.
All photos are stored on the Company’s servers, with the photographs from each hole
contained within separate folders.
Development faces are mapped geologically.
RC, RAB and Aircore chips are geologically logged.
Sludge drilling is logged for lithology, mineralisation and vein percentage.
Logging is quantitative in nature.
All holes are logged completely, all faces are mapped completely.
Blast holes -Sampled via splitter tray per individual drill rods.
RAB / AC chips - Combined scoops from bucket dumps from cyclone for composite. Split
samples taken from individual bucket dumps via scoop.
RC - Three tier riffle splitter (approximately 5kg sample). Samples generally dry.
Face Chips - Nominally chipped horizontally across the face from left to right, sub-set via
geological features as appropriate.
Diamond Drilling - Half-core niche samples, sub-set via geological features as appropriate.
Grade control holes may be whole-cored to streamline the core handling process if required.
Chips / core chips undergo total preparation.
Samples undergo fine pulverisation of the entire sample by an LM5 type mill to achieve a 75µ
product prior to splitting.
QA/QC is currently ensured during the sub-sampling stages process via the use of the
systems of an independent NATA / ISO accredited laboratory contractor. A significant portion
of the historical informing data has been processed by in-house laboratories.
The sample size is considered appropriate for the grain size of the material being sampled.
The un-sampled half of diamond core is retained for check sampling if required. For RC chips
regular field duplicates are collected and analysed for significant variance to primary results.
Recent drilling was analysed by fire assay as outlined below;
o A 40g – 50g sample undergoes fire assay lead collection followed by flame atomic
adsorption spectrometry.
o The laboratory includes a minimum of 1 project standard with every 22 samples analysed.
o Quality control is ensured via the use of standards, blanks and duplicates.
No significant QA/QC issues have arisen in recent drilling results.
Photon Assay was introduced in 2023 for Beta Hunt grade control samples. PhotonAssay™
technology (Chrysos Corporation Limited) is a rapid, non-destructive analysis of gold and
other elements in mineral samples. It is based on the principle of gamma activation, which
uses high energy x-rays to excite changes to the nuclear structure of selected elements. The
decay is then measured to give a gold analysis. Each sample is run through two cycles with a
radiation time of 15s. This methodology is insensitive to material type and thus does not
require fluxing chemicals as in the fire assay methodology. Highlights of the PhotonAssay™
process are as follows:
o
The process is non-destructive; the same sample accuracy can be determined by repeat
measurements of th
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