High Grade Polymetallic Assays at SOZ
Released
Released
Announcement PDF
ASX/Media Announcement
11 October 2023
High Grade Polymetallic Assays at SOZ
•
Diamond drilling into the underground Mineral Resource intersects high grade mineralisation.
•
Highlights from preliminary results (using a 1.0% CuEq cut off) include:
Hole ID
SOZGT01
SOZGT01
SOZGT02
SOZGT03
•
•
From (m DH)
194
220
172
154
Interval (m)
5
1
5
5.5
Au (g/t)
0.08
0.01
10.39
2.50
Ag (g/t)
54
25
19
49
Cu (%)
0.78
0.71
0.03
1.11
Pb (%)
5.68
6.38
0.35
3.01
Zn (%)
3.14
3.85
0.79
4.60
CuEq %
2.59
2.63
5.37
3.83
The drill data will be used to update the Mineral Resource estimate and provide input to
geotechnical parameters for stope design.
Re-entry to the existing underground development is under way to enable infill drilling from
underground to commence in Q3 FY24.
Kingston Resources Limited (ASX: KSN) (Kingston or the Company) is pleased to report assay results for
surface diamond drilling at the Southern Ore Zone (SOZ) of our Mineral Hill mine in NSW. The wide, highgrade portions of SOZ are highly significant for the business as they indicate a strong potential for favourable
margins upon commencing underground production.
The primary purpose of the drilling was to collect additional geotechnical data in order to assess the quality
of the rock mass around the top shear contact. While the geotechnical analysis is yet to be finalised, numerous
significant intersections were returned, particularly for drillholes SOZGT01 to SOZGT03. The mineralisation
was observed in the precise location of the existing Mineral Resource, which has increased the Company’s
confidence in the geological model in this area.
Additionally, diamond hole KSNDDH017 was drilled at the southern extent of the Mineral Resources to test
for extensions. Assays for geotechnical sample test intervals and KSNDDH017 are pending.
Kingston Resources Managing Director, Andrew Corbett, said:
“These results are very encouraging, not only due to the strength of the copper equivalent grades, but also
because they validate the existing geological model. Our underground production target, released at the end
of June 2023, was based on the SOZ Mineral Resource, so these intersections provide added confidence to
our life of mine forecasts.
We are focusing on the right technical areas to minimise risk and maximise opportunities that will come our
way when we are in production. The geotechnical data from these holes will allow us to optimise our
underground stope parameters so we can ramp up productivity and get the best value out of the asset.”
ASX: KSN
Shares on Issue: 498M
Market Cap: A$41.8M
Cash: A$18.2M (30 June 2023)
202/201 Miller Street,
North Sydney, NSW 2060
+61 2 8021 7492
info@kingstonresources.com.au
www.kingstonresources.com.au
@KSNResources
Figure 1: SOZ geotechnical drill holes (blue) and the southern extension diamond hole (black).
Kingston Resources Chief Geologist, Stuart Hayward, said:
“We’ve gleaned a lot of useful information from these holes. The material beneath the top-shear comprises
an area of wide, high-grade mineralisation. We are expecting that it will be a major component of our mine
schedules in terms of tonnage mined and metal feed into the processing plant. It’s highly encouraging that
the significant intersections mirror the existing nearby drilling and that our geological interpretation remains
accurate with the addition of this data.”
Next Steps
Recent efforts have focused on testing the geological interpretations, increasing the knowledge base on
ground conditions and developing geotechnical parameters to enhance the confidence on underground mine
designs. This new data and information from historical mining operations is being incorporated into a concise
Southern Ore Zone geology model.
Re-entry to the existing underground development is well under way, with rehabilitation to allow safe re-entry
for drilling and pre-production activities. In Q2-3 FY24, drilling will be conducted from both the underground
development and the surface via diamond drilling to infill the areas of the deposit that are currently classified
as Inferred. Additionally, significant attention will be given to testing the interpreted mineralised structures
that currently remain open along strike and at depth.
Updates to the Mineral Resource and Ore Reserve estimates are planned for Q4 FY24, taking into account
the acquisition of additional drilling, geotechnical, and metallurgical data.
www.kingstonresources.com.au
2
Figure 2: SOZGT01 significant intersections (275mN cross-section, +-12.5m window).
*High grade domain shapes are sliced on section and drill holes are projected +/-12.5m. This may create apparent discrepancies
between mineralised intercepts and domain shapes.
**See Table 2 and Table 3 for the full assay information that constitutes the assay component of CuEq calculation. Metallurgical
recoveries and metal pricing used for the CuEq calculation is shown under Metal Equivalents below.
www.kingstonresources.com.au
3
Figure 3: SOZGT02 significant intersections (325mN cross-section, +-12.5m window).
*High grade domain shapes are sliced on section and drill holes are projected +/-12.5m. This may create apparent discrepancies
between mineralised intercepts and domain shapes.
**See Table 2 and Table 3 for the full assay information that constitutes the assay component of CuEq calculation. Metallurgical
recoveries and metal pricing used for the CuEq calculation is shown under Metal Equivalents below.
www.kingstonresources.com.au
4
Figure 4: SOZGT03 significant intersections (450mN cross-section, +-12.5m window).
*High grade domain shapes are sliced on section and drill holes are projected +/-12.5m. This may create apparent discrepancies
between mineralised intercepts and domain shapes.
**See Table 2 and Table 3 for the full assay information that constitutes the assay component of CuEq calculation. Metallurgical
recoveries and metal pricing used for the CuEq calculation is shown under Metal Equivalents below.
www.kingstonresources.com.au
5
Table 1: Southern Ore Zone geotechnical drill hole collar (datum: MGA94 Zone 55).
Hole ID
SOZGT01
SOZGT02
SOZGT03
SOZGT04
KSNDDH017
Hole
Type
DDH
DDH
DDH
DDH
DDH
Dip
-60.3
-61.76
-63.45
-64.32
-63.6
Azim
GDA
44.8
40.2
46.0
42.6
70.5
AZIM
MHG
89.8
85.2
91.0
87.6
115.5
Total
Depth
273.30
237.30
211.90
235.00
463.50
1421
GDA_mE
GDA_MN
AHD
MHG_mE
MHG_mN
MHG_RL
499229.24
499228.52
499154.64
499110.02
499235.91
6395202.56
6395254.65
6395377.72
6395417.23
6395146.14
310.15
307.74
305.09
304.68
312.40
1198.16
1234.50
1269.40
1265.80
1163.00
283.47
320.80
460.10
519.60
238.90
1310.18
1307.80
1305.10
1304.70
1312.40
Table 2: Southern Ore Zone geotechnical drillhole significant intercepts (SOZGT01 to SOZGT03).
Hole ID
SOZGT01
SOZGT01
SOZGT01
SOZGT01
SOZGT01
SOZGT01
SOZGT01
SOZGT01
SOZGT01
SOZGT01
SOZGT01
SOZGT01
SOZGT01
SOZGT01
SOZGT02
SOZGT02
SOZGT02
SOZGT02
SOZGT02
SOZGT02
SOZGT02
SOZGT03
SOZGT03
SOZGT03
SOZGT03
SOZGT03
SOZGT03
SOZGT03
SOZGT03
SOZGT03
SOZGT03
SOZGT03
CuEqIS
%
COG
From
(m
DH)
To
(m
DH)
Interval
(m)
Au
(g/t)
Ag
(g/t)
Cu
(%)
Pb
(%)
Zn
(%)
CuEq
%
0.5
1
1
0.5
1
0.5
1
1
1
1
1
1
0.5
1
194
194
202
208
209
214.5
216
220
223
227.12
231
237
248
249
211
199
204.11
211
209.75
238
217
221
224
228
232
238
255
254
17
5
2.11
3
0.75
23.5
1
1
1
0.88
1
1
7
5
0.10
0.08
0.53
0.03
0.05
0.02
0.05
0.01
0.03
0.05
0.04
0.05
0.12
0.15
25
54
27
16
38
8
17
25
9
15
17
14
28
36
0.39
0.78
0.44
0.15
0.26
0.14
0.16
0.71
0.14
0.49
0.16
0.10
0.15
0.20
2.85
5.68
3.04
3.02
10.46
1.05
1.93
6.38
1.32
2.18
1.89
1.31
3.15
4.14
1.59
3.14
2.82
0.70
0.58
1.06
2.18
3.85
1.66
2.17
2.56
3.02
2.78
3.35
1.32
2.59
1.86
0.90
2.40
0.57
1.03
2.63
0.75
1.33
1.09
1.03
1.45
1.84
0.5
1
0.5
1
0.5
0.5
1
172
172
181.1
187
214
221.6
221.6
178
177
206.3
205
217
227.1
226.1
6
5
25.2
18
3
5.5
4.5
8.67
10.39
0.12
0.16
0.04
0.30
0.33
17
19
31
40
13
18
20
0.03
0.03
0.65
0.86
0.10
0.10
0.11
0.38
0.35
3.08
4.09
0.99
1.18
1.33
0.80
0.79
2.37
2.89
0.47
2.14
2.41
4.53
5.37
1.77
2.29
0.44
0.96
1.08
0.5
1
0.5
1
0.5
0.5
0.5
1
1
0.5
1
153.6
154
164
164
173
178
181.2
181.2
185
195.2
199.3
161.1
159.5
166
165
175
179
188.7
181.6
186
196
200
7.5
5.5
2
1
2
1
7.5
0.4
1
0.8
0.7
2.12
2.50
0.97
1.73
0.16
0.04
0.12
0.01
0.27
0.94
3.02
39
49
8
4
4
3
13
3
28
3
1
0.89
1.11
0.09
0.07
0.17
0.05
0.23
0.05
0.58
0.29
0.02
2.30
3.01
0.73
0.49
0.71
0.59
2.75
0.92
4.94
0.06
0.13
3.56
4.60
0.39
0.51
0.33
1.03
1.54
0.24
1.86
0.01
0.04
3.08
3.83
0.79
1.10
0.43
0.39
1.11
0.27
2.00
0.72
1.51
Incl.
and
Incl.
Incl.
and
and
and
and
and
Incl.
Incl.
Incl.
Incl.
Incl.
Incl.
Incl.
and
Incl.
www.kingstonresources.com.au
6
Table 3: Southern Ore Zone geotechnical drillhole significant intercepts for SOZGT04.
Hole ID
SOZGT04
SOZGT04
SOZGT04
SOZGT04
Incl.
CuEqIS
%
COG
0.5
1
0.5
0.5
From
(m DH)
To
(m DH)
Interval
(m)
Au
(g/t)
Ag
(g/t)
Cu
(%)
Pb
(%)
Zn (%)
CuEq %
181.6
181.6
191.2
204
186
186
199
205
4.4
4.4
7.8
1
0.45
0.45
0.36
0.61
20
20
6
2
0.32
0.32
0.17
0.12
1.28
1.28
0.29
0.33
1.77
1.77
0.31
0.35
1.17
1.17
0.46
0.53
* DD cut core samples (Half core HQ3, Quarter core PQ3). 0.3m min to 1m max sample intervals. FAS 50g + 4 Acid Digest-ICP. QAQC checked and verified
(Au + BM CRM, Pulp Blanks, Duplicates, Sample weights, DGPS Collar Locations, Single Shot Downhole surveys, Data verification).
**Drill hole intervals are reported as continuous zones at CuEqIS cut off grade of greater than 0.5% and 1.0%, with 2 metres maximum internal waste and
minimum interval of 0.3mdh.
*** Mineralised intercepts for reporting are derived from In-Situ Copper Equivalent (CuEqIS) using the following formula. Proportions are based on KSN
forward looking USD$ commodity pricing and are not inclusive of metallurgical recovery.
CuEqIS%= (Au_ppm*0.63)+ (Ag_ppm*0.0078)+ (Cu%*1.0)+ (Pb%*0.224)+ (Zn%*0.342)
**** Assays and mineralised intercepts are considered as Preliminary pending receipt of analysis from geotechnical samples up to 500mm axial length that
are at times internal to the reported intercepts. Geotechnical samples are included within these intercepts as returning zero grade. Final assays will be
reported later.
Metal Equivalents
This announcement quotes metal equivalent grades for significant mineralised intercepts. The process of
selecting significant intercepts involves a first pass of calculating In-Situ Copper Equivalent (CuEqIS) by
applying factors based on relative metal pricing. The first pass does not include metallurgical recovery. Drill
hole intervals are reported as continuous zones at CuEqIS cut off grade of greater than 0.5% and 1.0%, with
2 metres maximum internal waste and minimum interval of 0.3mdh.
Price assumptions used are based primarily on consensus forecasts with adjustments based on company
expectations. Upon deriving the significant intercepts with CuEqIS, metallurgical recovery is applied to derive
copper equivalent (CuEq) factors for reporting. These are calculated by dividing price/unit for each commodity
(Cu/t, Au/oz, Ag/oz, Pb/t, Zn/t) and multiplying by the metallurgical recovery.
CuEq (%) = (Cu x 0.810) + (Au x 0.480) + (Ag x 0.005) + (Pb x 0.178) + (Zn 0.205)
Metallurgical recoveries are based on historical production (2010-2016) as well as recent metallurgical test
work and are applied to the Resource and Reserve calculated grades for each commodity. The Company is
of the opinion that all the elements included in the metal equivalent calculations have a demonstrated potential
to be recovered and sold. Mineral Hill has a CIL circuit, and is currently reinstating the flotation circuit to
produce gold, copper, lead and zinc concentrates as well as gold/silver dore.
Commodity
Unit
Gold
Silver
Copper
Lead
Zinc
USD:AUD
www.kingstonresources.com.au
US$/oz
US$/oz
US$/lb
US$/lb
US$/lb
Price
Commodity
Recovery (%)
CuEq Factor
1,933
24
4.46
1.00
1.52
0.68
Gold
Silver
Copper
Lead
Zinc
76
64
81
79
60
0.480
0.005
0.810
0.178
0.205
7
ABOUT KINGSTON RESOURCES
Kingston Resources is currently producing gold from its Mineral Hill gold and copper mine in NSW and is
developing the 3.8Moz Misima Gold Project in PNG. The Company’s objective is to establish itself as a midtier gold and base metals company with multiple producing assets.
Mineral Hill Mine, NSW (100%)
•
•
•
•
•
Mine plan out to the end of 2027: Open pit and underground mining.
Significant upside: Current life of mine only utilises 22% of the current 8.9Mt of Mineral
Resources.
Infrastructure excellence: Extensive existing infrastructure with all permits and approvals
in place.
Exploration potential: Exceptional upside within current Mining Leases (ML) and
Exploration Licenses (EL).
Current Focus: Maximising returns from Tailings Project gold production, proactive
exploration drilling, and underground re-entry.
Misima Gold Project, PNG (100%)
•
•
•
•
•
DFS Validation: potential for a robust, scalable, and low-cost open pit operation.
Production Potential: Anticipated gold production of ~2.4Moz over a 20-Year Mine Life
(Avg. 128kozpa).
Strong Financial Viability: Pre-Tax Net Present Value (NPV) of A$956 Million (based on
a US$1,800/oz Gold Price).
Gold Price Upside: Highly leveraged to the upside of the gold price, amplifying potential
returns.
Current Focus: Prioritising ESIA reports, strategic funding & development strategies.
Mineral Hill is a gold and copper mine located in the Cobar Basin of NSW. In June 2023, the company
updated its life of mine plan, including both open pit and underground mining until 2027. The processing plant
currently operates a CIL, and work is underway to recommission the existing crushing, grinding and flotation
circuits for copper, lead and zinc concentrate production. In addition to current production, the company is
focused on meeting near mine production targets located on the existing MLs. The aim is to extend the mine’s
life through organic growth and consider regional deposits that could be processed at Mineral Hill’s
processing plant.
Misima hosts a JORC Resource of 3.8Moz Au and an Ore Reserve of 1.73Moz. Placer Pacific operated
Misima as a profitable open pit mine between 1989 and 2001, producing over 3.7Moz before it was closed
when the gold price was below US$300/oz. The Misima Project also offers great potential for additional
resource growth through exploration success targeting extensions and additions to the current Resource
base.
For further information regarding the Misima Mineral Resource and Ore Reserve estimate, see ASX
announcements on 24 November 2020 and 15 September 2021 and 6 June 2022. Further information is
included within the original announcements.
The Mineral Hill Mineral Resource estimate outlined below was released in ASX announcements on 18
November 2021 (TSF), 15 March 2023 (Pearse South and Pearse North), 24 November 2022 (Southern Ore
Zone), 21 March 2023 (Jack’s Hut) and 13 September 2011(Parkers Hill by KBL). The Ore Reserve estimate
outlined below was released in ASX announcements on 18 November 2021 (TSF), 15 March 2023 (Pearse
South and Pearse North). Further information is included within the original announcements.
Kingston is not aware of any new information or data that materially affects the information included in this
announcement. All material assumptions and technical parameters underpinning the Mineral Resources and
Ore Reserve estimates continue to apply and have not materially changed.
www.kingstonresources.com.au
8
This release has been authorised by the Kingston Resources Limited Board. For all enquiries, please contact Managing Director,
Andrew Corbett, on +61 2 8021 7492.
MINERAL RESOURCES AND ORE RESERVES
Misima JORC 2012 Mineral Resource & Ore Reserve summary table
Resource Category
Cut-off (g/t Au)
Tonnes (Mt)
Gold Grade (g/t Au)
Silver Grade (g/t Ag)
Au (Moz)
Ag (Moz)
Indicated
0.3
97.7
0.79
4.3
2.5
13.4
Inferred
0.3
71.3
0.59
3.8
1.4
8.7
Total
0.3
169
0.71
4.1
3.8
22.1
Reserve
Cut-off (g/t Au)
Tonnes (Mt)
Gold Grade (g/t Au)
Silver Grade (g/t Ag)
Au (Moz)
Ag (Moz)
Probable
0.3
75.6
0.79
4.2
1.73
4.1
Mineral Hill JORC 2012 & JORC 2004 Mineral Resource & Ore Reserve summary table
Resource
Category
Measured
Tonnes
(kt)
228
Gold
Grade
(g/t)
2.11
Silver
Grade
(g/t)
11
Cu %
1.3%
Pb %
0.5%
Zn %
0.3%
Au (koz)
15
Ag (koz)
80
Cu (kt)
3
Pb (kt)
1.2
Zn (kt)
0.7
Indicated
5,582
1.06
28
1.2%
1.7%
1.1%
191
4,244
47
70
42
Inferred
3,091
1.17
23
0.7%
1.4%
1.2%
116
2,242
22
42
38
Total
8,901
1.13
26
1.0%
1.6%
1.1%
323
6,566
72
113
81
Reserve
Category
Proved
Tonnes
(kt)
-
Gold
Grade
(g/t)
0.00
Silver
Grade
(g/t)
0
Cu %
Pb %
Zn %
Au (koz)
-
Ag (koz)
0
Cu (kt)
Pb (kt)
Zn (kt)
Probable
1,431
1.55
57
71
470
Total
1,431
1.55
57
71
470
Competent Persons Statement and Disclaimer
The information in this report that relates to Exploration Results and Mineral Resources is based on information compiled by Mr.
Stuart Hayward BAppSc (Geology) MAIG, a Competent Person who is a member of the Australian Institute of Geoscientists. Mr.
Hayward is an employee of the Company. Mr. Hayward 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”. Mr. Hayward confirms
that the information in the market announcement provided is an accurate representation of the available data and studies for the
material mining project and consents to the inclusion in this report of the matters based upon the information in the form and context
in which it appears.
The Competent Person signing off on the overall Misima Ore Reserves Estimate is Mr John Wyche BE (Min Hon), of Australian Mine
Design and Development Pty Ltd, who is a Fellow of the Australasian Institute of Mining and Metallurgy and who has sufficient
relevant experience in operations and consulting for open pit metalliferous mines. Mr Wyche consents to the inclusion in this report
of the information pertaining to the Misima Ore Reserve in the form and context in which it appears.
The Competent Person signing off on the overall Pearse Opencut Ore Reserves Estimate is Mr John Wyche BE (Min Hon), of
Australian Mine Design and Development Pty Ltd, who is a Fellow of the Australasian Institute of Mining and Metallurgy and who has
sufficient relevant experience in operations and consulting for open pit metalliferous mines. Mr Wyche consents to the inclusion in
this report of the information pertaining to the Pearse Opencut Ore Reserve in the form and context in which it appears.
www.kingstonresources.com.au
9
JORC CODE 2012 EDITION,
Section 1 Sampling Techniques and Data
(Criteria in this section apply to all succeeding sections.)
Criteria
JORC Code explanation
Sampling
techniques
• Nature and quality of sampling (eg 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 (eg ‘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 (eg
submarine nodules) may warrant disclosure of
detailed information.
www.kingstonresources.com.au
Commentary
Diamond Drilling Sample Collection
• A diamond core drill rig was used to produce rock samples of core. Run length was variable
between 3m and 1m depending on the ground conditions and any expected mineralization.
• Triple Tube PQ and HQ barrel set up was utilized to maximize recoveries. PQ was used in
weathered zone, typically approximately the first 30m followed by HQ3.
• Diamond drill core is orientated where orientation tools provided an outcome that is
assessed as reliable.
• The geologist selects sample intervals based on logged lithology, alteration, mineralisation
and structures with a minimum sample length of 0.3m and a maximum of 1.0m. Drill core is
sampled only within potentially mineralised zones and extending up to 10m outside of
mineralised zones as determined by visual and/or pXRF analysis.
• All drill core is sampled using an automated/mechanical core cutting machine with diamond
cutting blade. Samples comprise half core for HQ3, and quarter core for PQ3 with sample
intervals determined by the geologist and recorded as a cut sheet.
• For orientated drill core a cutting refence line is drawn approximately 15mm offset form the
orientation line. Drill core is cut along the cut line with the orientation line not sampled and
returned to the core box for future reference.
• Non-orientated drill core is cut along a reference line that is the best approximation of the
extensions of the orientation reference line with the intent of ensuring the same half core is
sampled.
Samples are placing calico bags and dispatched to SGS laboratory where they are received
and registered with a sample receipt document provided as a record of the chain of custody
process.
Analysis of Geotechnical Samples
• Multiple whole core samples were collected and dispatched for laboratory based
geotechnical and material properties testing and analysis.
• Sample intervals were a maximum 0.5m length along the core axis.
• Samples were returned to the core yard where tested/destructed samples were submitted in
their entirety for crushing and splitting to ensure a representative sample for geochemical
analysis.
• Partially destructed samples that can be pieced back together, and non-tested samples
were cut using the auto core saw and half submitted for analysis in a manner consistent
with drill core sampling procedures.
10
Criteria
JORC Code explanation
Commentary
Drilling
techniques
• Drill type (eg 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).
Drill sample
recovery
• 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.
• Diamond Core Drilling: - Triple tube diamond core, PQ3 collar followed by HQ3 tail. In
areas where ground conditions created a risk of not reaching target depths in HQ3, the core
size was reduced to NQ3.
• Where possible core was oriented using a Reflex down hole digital orientation tool.
• Historical drill holes through the Talingaboolba Fm. Cover sequence utilised either rotary
mud, PQ3 core to a competent formation before reduction to either HQ3 or NQ3 diamond
core.
• Reverse Circulation Drilling
• No Reverse Circulation drilling was completed as part of the program being reported or
depicted in the release.
• Diamond Drill Core
• Diamond drill core is recovered on a run-by-run basis where the length drilled and axial
length recovered is recorded by the drilling crew. Run length and recovery are
remeasured and calculated in the core processing area. No significant discrepancies
have been noted between driller and KSN determined runs and recovery.
• Diamond drill core is sampled as half core using a diamond blade auto saw.
• Core loss zones have not been sampled. These ‘gaps’ in sampling have been
assigned zero (0) grade for the purposes of significant interval calculation.
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.
• Whether logging is qualitative or quantitative in
nature. Core (or costean, channel, etc)
photography.
• The total length and percentage of the relevant
intersections logged.
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• Reverse Circulation Drilling
• No Reverse Circulation drilling referred to or reported or depicted in the release.
• A qualified geologist and engineering geologist logs all drill core from this program.
Historical and KSN DDH and RC holes were logged by a qualified geologist.
• Logging captured, lithological, alteration, mineralization, structural and weathering
information. Drill core also provided geotechnical data based on physical counts of and
physical measurement of angles, hardness, roughness, of discontinuities and visual
assessment and description of structural features.
• Geological logging is generally qualitative in nature noting the presence of various
geological features and their intensities using a numerical 1-5 scale. Quantitative features of
the logging include structural alpha and beta measurements captured as well as magnetic
susceptibility data.
• The entire DDH are logged and photographed.
• Diamond Core Drilling
• Recoveries were measured by the driller and/or offsider whilst in the splits on the rack
at the rig site using a handheld tape measure. Recoveries were written in permanent
marker on a core block placed in the core tray. The Geologist and/or field assistant
measured the length of recovered core in the trays when meter marking the core.
Recovery is recorded as a percentage per run.
11
Criteria
JORC Code explanation
Commentary
•
•
•
Sub-sampling
techniques
and sample
preparation
Quality of
assay data
and
laboratory
tests
• 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 subsampling 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.
•
• 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 (eg
standards, blanks, duplicates, external laboratory
checks) and whether acceptable levels of accuracy
(ie lack of bias) and precision have been
established.
•
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•
•
•
•
•
•
•
PQ diameter core was used in more broken ground close to surface in order to
maximize recoveries. Additionally, the driller adjusted the length of runs depending on
ground conditions, shorter runs were used in intervals of more challenging ground
conditions. The driller used variable penetration rates to maximize recoverable core.
There is no observed relationship between sample recovery and grade.
5 Diamond drill holes were completed in the program being reported for a total of 1421m of
drill core.
Diamond drill core sampling intervals are determined by the logging geologist and is defined
by key geological characteristics such as lithology, alteration, mineralisation style
paragenesis etc, and structure.
Drill core is sampled as half core using an automated diamond blade core saw.
Core is sampled from the same half with a cut at approximately 15mm offset from the BOH
orientation line that is retained in the core tray for future reference.
Primary sample intervals are note subsampled further.
Routine QAQC was used in the sampling process. Blank material was introduced at 1:20.
Certified Reference Material was introduced at a ratio of 1:20 and in areas of identified
mineralization.
Samples from the field are dispatched to the sample preparation facility in Orange where
they are dried, crushed and pulverised with a 150g pulp subsample collected for analysis.
Sample representivity and quality is assessed using KSN QAQC protocols.
Half core samples are appropriate for the host rock characteristics and mineralisation style.
Mineralised veins are on the whole at moderate angles to core axis enabling a
representative sample to be achieved through the half core sampling process.
Geochemical analysis is carried out on all samples using a standardised analytical suite
and sample preparation protocol.
• Gold analysis is determined by fire assay (FA) by using lead collection technique with a
50g sample charge weight and AAS instrument finish. Gold by Fire Assay (FA) is
considered a “complete or total” method for total recovery of gold in sample.
• A multi (42) element suit was used for full geochemical coverage. This was a 4 Acid Digest
with an ICP-OES finish. The 4 Acid digest is a total method. Historically Aqua Regia has
been used at Mineral Hill. Kingston has decided to use the more robust 4 acid digest for its
drilling programs. The sample 0.2g (df=500) is digested with nitric, hydrochloric, hydrofluoric
and perchloric acids to effect as near to total solubility of the sample as possible. With m
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