Near mine discovery at Mineral Hill
Released
Released
Announcement PDF
ASX/Media Announcement
1 November 2023
Near Mine Discovery at Mineral Hill
•
New high grade polymetallic mineralisation zones discovered adjacent to the Southern Ore Zone.
•
Key highlights from drill hole KSNDDH017 include:
incl
incl
incl
incl
incl
Interval (m)
22.00
2.00
1.00
3.55
12.50
4.00
4.00
From (m DH) Au (g/t) Ag (g/t) Cu (%) Pb (%) Zn (%)
266
0.53
20
0.47
2.22
1.20
266
1.29
30
0.40
3.12
4.27
274
2.66
24
0.26
1.14
0.62
284
0.44
37
1.24
6.12
1.93
405
0.11
17
2.10
3.67
4.50
406.5
0.12
28
4.40
4.26
4.88
413.5
0.06
22
1.85
6.77
8.30
CuEqIS (%) CuEq1 (%)
1.87
1.38
3.60
2.52
2.60
1.95
3.84
2.89
4.66
3.41
7.32
5.51
6.41
4.54
•
The new zones of mineralisation are distinct from the existing Mineral Resources.
•
Follow up drilling will commence in the first week of November to test continuity of this newfound
mineralisation.
Kingston Resources Limited (ASX: KSN) (Kingston or the Company) is pleased to announce the discovery
of two new mineralised structures to the east of the Southern Ore Zone (SOZ) Mineral Resource model.
A new structure was identified in historic drill holes and confirmed in recent drilling. The structure extends into
the footwall of the easternmost lode (A-lode) of the current SOZ resource model. Interpretation of multiple
>1% CuEq intercepts in diamond drill holes represents a volume of material that is broadly parallel to the
known deposit. This structure is not modelled or evaluated in the 2022 SOZ Mineral Resource estimate (see
ASX announcement 24 November 2022).
A second high-grade polymetallic mineralised structure was also intersected, representing the discovery of a
new zone of mineralisation. Surface diamond drill hole KSNDDH017 was drilled at the southern end of the
SOZ to test for extensions of the underground Mineral Resources. The shallow portions of the drillhole initially
confirmed the width and tenor of the existing resources and then a new high-grade structure was intersected
at depth. None of the previous drillholes have intersected this mineralisation. Multiple mineralised intercepts
above the new structure suggest further potential of additional structures nearby.
The Company is planning to follow up this drilling with additional surface drill holes to test the geometry and
orientation of the new lodes. A drilling contractor has been engaged and drilling will commence imminently.
This discovery is highly significant for Kingston, as it has the potential to expand the underground Mineral
Resources and add to the Company’s life of mine inventory. Kingston currently has a LOM production target
out to 2027 and is forecast to produce separate gold, copper, lead and zinc concentrates as well as gold/silver
dore.
1 Copper equivalent (CuEq) is derived using metallurgical recovery and commodity prices. In-situ copper equivalent (CuEqIS)
is derived using commodity prices only. See the details in the Metal Equivalents section later in this announcement.
ASX: KSN
Shares on Issue: 498M
Market Cap: A$44.4M
Cash: A$13.8M (30 September
2023)
202/201 Miller Street,
North Sydney, NSW 2060
+61 2 8021 7492
info@kingstonresources.com.au
www.kingstonresources.com.au
@KSNResources
Figure 1: Isometric view to the southwest of the two new structures relative to the current SOZ model and proposed drill holes.
Kingston Resources Managing Director, Andrew Corbett, said:
“We are very excited to share this significant near-mine discovery of high-grade polymetallic mineralisation
at Mineral Hill. This is a huge result for Kingston and we’re excited to see how our geological model evolves
with this new information.
To fully grasp the implications of this discovery, we are embarking on follow-up surface drilling in early
November. This is a pivotal step in expanding our underground Mineral Resources and enriching our
company’s life-of-mine inventory.
This discovery underscores the high confidence we've always had in uncovering additional mineralisation
within our mining lease—a key motivation behind our original acquisition of Mineral Hill almost two years
ago.”
www.kingstonresources.com.au
2
Figure 2: KSNDDH017 (200mN cross-section, +-50m window).
*High grade domain shapes are sliced on section and drill holes are projected +/-50m. This may create apparent discrepancies
between mineralised intercepts and domain shapes.
**See Table 2 and Error! Reference source not found. 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
Kingston Resources Chief Geologist, Stuart Hayward, said:
“The insights derived from KSNDDH017 are truly transformative for our geological team and the broader
operations at Kingston. This drill hole marks a highly significant milestone, as it not only provides a fresh
perspective but also opens up an array of exciting geological possibilities at Mineral Hill.
One of the most intriguing aspects of this discovery is that it allows us to re-evaluate our deposit scale
geological model and test the potential for additional mineralisation at depth. Based on the orientation of
adjacent Mineral Resources, the previous drilling has not intersected this structure. This success initiated a
review of historical drilling above this position closer to the stacked sequence of SOZ lodes, revealing a
second mineralised structure that’s not represented in current models.
We are now prioritising the mobilisation of a surface drill rig to test these structures further, focusing initially
on areas close to our existing underground development, where we believe the most promising opportunities
for additional mineralisation lie.”
See Figure and Error! Reference source not found. for a cross-section and plan map of KSNDDH017. The 1
2.5m intersection from 405m depth represents the new structure. Table 2 shows the grades of the individual
elements and the copper equivalent grades (CuEq2).
Figure 3: SOZ geotechnical drill holes (blue) and the southern extension diamond hole (black).
2 See the Metal Equivalents section on the calculation of copper equivalent grades.
www.kingstonresources.com.au
4
Table 1: Southern Ore Zone KSNDDH017 drill hole collar (datum: MGA94 Zone 55).
Hole ID
KSNDDH017
Hole
Type
DDH
Dip
-63.6
Azim
GDA
70.5
AZIM
MHG
115.5
Total
Depth
463.50
GDA_mE
GDA_MN
AHD
MHG_mE
MHG_mN
MHG_RL
499235.91
6395146.14
312.40
1163.00
238.90
1312.40
Table 2: Southern Ore Zone KSNDDH017 drillhole significant intercepts.
Hole ID
Interval
(m)
KSNDDH017
KSNDDH017
KSNDDH017
KSNDDH017
KSNDDH017
KSNDDH017
KSNDDH017
KSNDDH017
KSNDDH017
KSNDDH017
KSNDDH017
KSNDDH017
KSNDDH017
KSNDDH017
KSNDDH017
KSNDDH017
KSNDDH017
KSNDDH017
KSNDDH017
1.00
22.00
2.00
1.00
3.55
2.60
0.80
4.00
6.00
1.00
1.00
3.00
1.00
5.00
4.00
12.50
4.00
4.00
1.00
incl
incl
incl
incl
incl
incl
incl
incl
From
To
(m
(m
DH)
DH)
243
244
266
288
266
268
274
275
284 287.55
314 316.6
315 315.8
324
328
333
339
337
338
377
378
384
387
385
387
393
398
393
397
405 417.5
406.5 410.5
413.5 417.5
436
437
Au
(g/t)
Ag
(g/t)
Cu
(%)
Pb
(%)
Zn
(%)
CuEqIS
(%)
CuEq
(%)
CuEqIS %
COG
0.02
0.53
1.29
2.66
0.44
0.13
0.25
0.07
0.11
0.01
0.1
0.46
0.61
0.59
0.72
0.11
0.12
0.06
0.03
81
20
30
24
37
33
32
10
13
2
5
18
24
7
8
17
28
22
10
0.02
0.47
0.40
0.26
1.24
0.19
0.37
0.14
0.04
0.00
0.03
0.25
0.36
0.26
0.28
2.10
4.40
1.85
0.35
0.03
2.22
3.12
1.14
6.12
2.02
2.92
1.90
1.15
0.17
0.38
0.47
0.62
1.14
1.31
3.67
4.26
6.77
2.70
0.10
1.20
4.27
0.62
1.93
2.83
3.44
2.18
3.84
0.60
0.94
1.00
0.69
1.21
1.22
4.50
4.88
8.30
0.21
0.71
1.87
3.60
2.60
3.84
1.95
2.60
1.44
1.77
0.27
0.54
1.12
1.30
1.36
1.51
4.66
7.32
6.41
1.12
0.46
1.38
2.52
1.95
2.89
1.32
1.80
0.98
1.13
0.17
0.36
0.80
0.95
0.98
1.10
3.41
5.51
4.54
0.87
0.5
1.0
2.5
2.5
2.5
0.5
1.0
1.0
0.5
1.0
0.5
0.5
1.0
0.5
1.0
0.5
1.0
2.5
1.0
* 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%,1.0% and 2.5%, 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 for KSNDDH017 are considered as final.
The Southern Ore Zone (SOZ) at Mineral Hill typically comprises a series of parallel to en-echelon steeply
west-dipping mineralised polymetallic fault/breccia zones hosted by the Mineral Hill Volcanics and Sediments.
Each lode has a distinct sulphide mineral assemblage comprising variable proportions of Sphalerite-GalenaChalcopyrite-Pyrite-Pyrrhotite. This is reflected in the SOZ mineral system having a broad metal zonation
with lead-zinc-copper dominant in upper levels, transitioning to gold-copper dominant in deeper levels.
Figure 2 shows the mineralisation intersected at 405m depth downhole in KSNDDH017. The style of
mineralisation is consistent with the known mineralisation within the SOZ. Mineralised shoot and lode
geometry at the SOZ broadly changes from a flatter orientation near surface, to a steeper dip at depth. This
portion of the mineralisation package is expected to be dipping approximately 70° to the west (mine grid). An
approximate true width for this intersection is 6-8m.
www.kingstonresources.com.au
5
Figure 2: KSNDDH017 drill core, tray 79-82, 404.03m to 421.35m depth.
Next Steps
Kingston has engaged a drilling contractor to mobilise to site and commence drilling in the first week of
November. A multi hole surface drilling program is planned with the aim of testing the geometry and
orientation of the mineralisation in KSNDDH017 and shallow dipping portions of SOZ at higher levels.
Underground drilling to infill the existing Inferred portions of the underground resources is on track to
commence later this year.
www.kingstonresources.com.au
6
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
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US$/oz
US$/oz
US$/lb
US$/lb
US$/lb
Price
Commodity
Recovery (%)
CuEq Factor
1,933
24
4.46
1.00
1.52
0.63
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.
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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 mineralisation.
• Triple Tube PQ and HQ barrel set up was utilised 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 placed in 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, mineralisation, 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
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•
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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.
•
www.kingstonresources.com.au
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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
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