Graphite Bull delivers more shallow high-grade intersections
Released
Released
Announcement PDF
ASX Release
12 December 2024
Graphite Bull delivers more shallow high-grade intersections
•
Assays received for remaining RC holes from the 2024 drilling program
•
Standout, shallow, high-grade results include:
o GB011RC: 50 m @ 24.9% TGC from 38 m
o GB009RC: 10 m @ 37.3% TGC from 12 m, including 6 m @ 47.3% TGC
•
Geological modelling being finalised, new Resource Estimate expected endJan / early Feb 2025
•
Results from BTR qualification testwork expected early Feb
Buxton Resources Ltd (‘Buxton’; ASX:BUX) is pleased update shareholders that
laboratory assaying has been completed for all recent RC drilling at Graphite Bull.
New, stand-out intersections include GB011RC: 50 m @ 24.9% TGC from 38 m
(estimated true thickness 46.2 m – Figure 3) and GB009RC: 10 m @ 37.3% TGC from
12 m (true thickness ~ 10.0 m), including 6 m @ 47.3% TGC from 14 m (Figure 5).
Buxton is now completing 3D geological interpretation along a ~1,500 metre strike
length where mineralisation starts at surface and remains open at depth (see cross
sections and maps below). Several zones appear to have good potential to support
Resource classification with reasonable prospects for economic extraction by openpit methods. These zones include the existing Resource and a ~440 metre zone in
the east (Figure 7). The updated Resource Estimate will be undertaken by ERM and
is expected to be delivered in late January – early February 2025.
Buxton has provided BTR with a 750 kg bulk sample of ore at ~13.75% TGC derived
from four RC holes within the existing Resource (4Mt @ 16.2% TGC). BTR have
previously tested Graphite Bull flake concentrate with positive results and are now
undertaking qualification testwork on ore with results expected early February 2025.
CEO, Marty Moloney, comments, “Incredibly high grades and an investment-friendly
location are two of Graphite Bull’s defining qualities. We’re now finalising inputs to
the resource upgrade, which is a key short-term priority. These results, along with
qualification feedback from BTR will then guide Buxton’s strategy at Graphite Bull.”
This announcement is supported by a video overview from CEO
Marty Moloney on the Buxton Resources Investor Hub
PO Box 661
Nedlands WA 6009
15 Robinson Av
Belmont WA 6104
T: 08-9380 6063
E: info@buxtonresources.com.au
W: www.buxtonresources.com.au
Visit our investor hub: investorhub.buxtonresources.com.au
About BTR
BTR New Material Group Co., Ltd. (“BTR”) is a fully vertically integrated Chinese
anode manufacturer, from upstream natural graphite mining to downstream lithiumion battery materials including anode, cathode and new materials for lithium-ion
batteries. BTR has held the top global market share for sale of anode materials for
14 years, and currently has >25% of global anode market share. The company serves
major lithium-ion battery manufacturers such as Panasonic, Samsung SDI, LGES, SK
on, CATL, and BYD.
BTR’s new 80 ktpa anode production plant in Kendal, Centra Java, represents a
US$750M investment and started production on August 7th 2024, becoming the first
anode production plant operated by Chinese company outside China. Stage 2 (also
80 ktpa) is in construction, with production scheduled for 2026. When completed
this single plant will consume ~320 ktpa of fine flake (-100um) graphite feedstock.
As of the end of August 2024, BTR has operating anode production capacity of
575,000 tpa.
Figure 1: Graphite Bull is ideally located to supply new anode facilities in Asia
This announcement is authorised by the Board of Buxton Resources Ltd. For
further information, please contact:
Martin Moloney
Sam Wright
Chief Executive Officer
Company Secretary
marty@buxtonresources.com.au
sam@buxtonresources.com.au
PO Box 661
Nedlands WA 6009
15 Robinson Av
Belmont WA 6104
T: 08-9380 6063
E: info@buxtonresources.com.au
W: www.buxtonresources.com.au
Visit our investor hub: investorhub.buxtonresources.com.au
Figure 2: Graphite Bull Project cross section for GB018RC and GB023RC with new assay results
(composited at 10% TGC cutoff are labelled) and current interpretation of mineralisation continuity.
PO Box 661
Nedlands WA 6009
15 Robinson Av
Belmont WA 6104
T: 08-9380 6063
E: info@buxtonresources.com.au
W: www.buxtonresources.com.au
Visit our investor hub: investorhub.buxtonresources.com.au
Figure 3: Graphite Bull Project cross section showing holes GB004RC (from 2023) and GB011RC with
new assay results for GB011RC. The assays have been (composited at 10% TGC / Total Carbon (TC)
cutoff are labelled) and current interpretation of mineralisation continuity. See JORC Table 1 for a
discussion on TC vs TGC, which are considered essentially equivalent for fresh-moderately oxidised
Graphite Bull material.
PO Box 661
Nedlands WA 6009
15 Robinson Av
Belmont WA 6104
T: 08-9380 6063
E: info@buxtonresources.com.au
W: www.buxtonresources.com.au
Visit our investor hub: investorhub.buxtonresources.com.au
Figure 4: Graphite Bull Project cross section showing holes GB003RC (from 2023) and GB019RC with
new assay results for GB019RC. The assays have been (composited at 10% TGC / Total Carbon (TC)
cutoff are labelled) and current interpretation of mineralisation continuity. See JORC Table 1 for a
discussion on TC vs TGC, which are considered essentially equivalent for fresh-moderately oxidised
Graphite Bull material
PO Box 661
Nedlands WA 6009
15 Robinson Av
Belmont WA 6104
T: 08-9380 6063
E: info@buxtonresources.com.au
W: www.buxtonresources.com.au
Visit our investor hub: investorhub.buxtonresources.com.au
Figure 5: Graphite Bull Project cross section through GB009RC, GB010RC and GB027RC with new
assay results (composited at 10% TGC cutoff are labelled) plus 2014 Resource zones and the current
interpretation of mineralisation continuity. Previously reported visual estimates of graphitic
mineralisation are also plotted on GB006DD as sampling for this diamond hole is in progress.
Cautionary Statement: Visual estimates of mineral abundance should never be considered a proxy or substitute for
laboratory analyses where concentrations or grades are the factor of principal economic interest. Visual estimates
also potentially provide no information regarding impurities or deleterious physical properties relevant to valuations.
PO Box 661
Nedlands WA 6009
15 Robinson Av
Belmont WA 6104
T: 08-9380 6063
E: info@buxtonresources.com.au
W: www.buxtonresources.com.au
Visit our investor hub: investorhub.buxtonresources.com.au
Figure 6: Graphite Bull Project cross section (cross reference Figure # on map below) with composited
assay results for 2024 RC holes plus the 2014 Resource zones and 2013/2014 drillholes.
PO Box 661
Nedlands WA 6009
15 Robinson Av
Belmont WA 6104
T: 08-9380 6063
E: info@buxtonresources.com.au
W: www.buxtonresources.com.au
Visit our investor hub: investorhub.buxtonresources.com.au
Figure 7: Graphite Bull Project plan showing recent drilling with intersections highlighted in the text
of this ASX Release along. The vertically projected area of the existing Resource is shown (4 Mt @
16.2% TGC). The location of cross sections presented above are indicated in blue. Cross sections in
orange are from ASX Release 24th October 2024 – Graphite Bull: Record Setting 124 m @ 16.6%
TGC. Two zones appear to have good potential to support Resource classification with reasonable
prospects for economic extraction by open-pit methods. These areas comprise the existing Resource
and a ~440 metre zone extending the cross sections shown in Figures 2 & 4.
PO Box 661
Nedlands WA 6009
15 Robinson Av
Belmont WA 6104
T: 08-9380 6063
E: info@buxtonresources.com.au
W: www.buxtonresources.com.au
Visit our investor hub: investorhub.buxtonresources.com.au
Table 1: Composited Total Graphitic Carbon (TGC) assay results from Graphite Bull at a 10% TGC
cutoff. Intersections in bold have been quoted in the text. GB006DD has partial assays completed
491 m – 541.96 m. The assay results from GB009RC includes a 2m RC sample that ran >50% TGC
and has been assigned a nominal 50% TGC grade for length-weighted compositing calculations. All
holes are outside the existing Resource apart from GB027RC, 030RC, 031RC and 032RC (yellow
shading) – these intersections supplied material for the BTR bulk ore sample. Previously reported
intersections are in italics & blue shading.
From
To
Interval
Drilled
Estimated
Lab
TGC %
Grade
(m)
(m)
(m)
Thickness
True
TGC
x
cutoff for
(m)
Thickness (m)
metres composite
Grade
(%)
(TGC %)
GB006DD
GB006DD
GB009RC
GB010RC
GB011RC
GB012RC
GB013RC
GB014RC
GB015RC
GB015RC
GB016RC
GB016RC
GB016RC
GB016RC
GB017RC
GB018RC
GB018RC
GB018RC
GB019RC
GB019RC
GB020RC
GB020RC
GB020RC
GB022RC
GB022RC
GB023RC
GB024RC
GB024RC
GB024RC
GB025RC
GB025RC
GB025RC
GB026RC
GB026RC
GB026RC
PO Box 661
Nedlands WA 6009
503.09
529.92
12
44
38
44
8
25
64
124
20
80
162
234
54
4
50
114
60
93
97
118
168
17
69
56
14
80
114
72
78
122
25
39
63
524.95
532
22
48
88
168
64
74
90
128
22
120
227
236
102
10
60
140
80
95
101
120
185
21
96
64
16
82
116
76
82
166
34
43
82
15 Robinson Av
Belmont WA 6104
21.86
2.08
10
4
50
124
56
49
26
4
2
40
65
2
48
6
10
26
20
2
4
2
17
4
27
8
2
2
2
4
4
44
9
4
19
15.46
1.47
10.0
4.0
46.2
47.7
35.1
37.0
15.0
2.3
1.5
29.7
48.3
1.5
37.0
2.6
4.4
11.4
13.1
1.3
2.7
1.3
11.4
2.3
15.5
5.9
1.2
1.2
1.2
1.3
1.3
14.3
5.7
2.5
12.0
11.5
14.6
37.3
25.6
24.9
16.6
14.4
10.7
12.6
14.3
10.9
12.9
10.1
12.6
10.4
19.3
15.7
16.1
11.2
10.8
14.8
10.5
13.9
15.0
10.9
14.0
17.5
14.4
16.8
12.2
10.5
10.5
12.2
11.7
11.5
252
30
373
102
1244
2058
808
525
328
57
22
515
659
25
497
116
157
418
224
22
59
21
236
60
294
112
35
29
34
49
42
461
110
47
219
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
T: 08-9380 6063
E: info@buxtonresources.com.au
W: www.buxtonresources.com.au
Visit our investor hub: investorhub.buxtonresources.com.au
From
(m)
To
(m)
Interval
(m)
Drilled
Thickness
(m)
Estimated
True
Thickness (m)
GB027RC
GB027RC
GB027RC
GB028RC
GB028RC
GB028RC
GB028RC
GB029RC
GB030RC
GB030RC
GB031RC
GB031RC
GB032RC
GB032RC
GB032RC
GB033RC
GB033RC
GB034RC
GB034RC
GB034RC
GB034RC
GB034RC
37
75
101
74
94
122
131
116
61
98
15
56
61
75
89
22
40
18
26
73
91
128
39
89
143
78
105
124
136
118
72
108
31
85
63
81
126
28
51
20
31
79
95
130
2
14
42
4
11
2
5
2
11
10
16
29
2
6
37
6
11
2
5
6
4
2
1.3
9.0
27.0
3.2
8.9
1.6
4.0
0.2
6.5
5.9
11.8
21.4
1.6
4.8
29.5
5.5
10.0
1.3
3.1
3.8
2.5
1.3
Lab
TGC
Grade
(%)
12.9
12.0
10.3
21.1
12.1
11.0
11.5
11.9
10.6
14.7
14.4
11.7
19.5
13.0
11.2
12.1
13.6
15.9
12.5
11.7
22.4
15.9
TGC %
x
metres
26
168
434
84
133
22
57
24
117
147
231
340
39
78
415
73
150
32
63
70
90
32
Grade
cutoff for
composite
(TGC %)
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
Competent Persons – Graphite Bull
The information in this report that relates to Exploration Results is based on information compiled by
Mr Martin Moloney, Member of the Australian Institute of Geoscientists and Society of Economic
Geologist. Mr Moloney is a full-time employee of Buxton Resources Ltd. Mr Moloney has sufficient
experience which is relevant to the activity being undertaken to qualify as a “Competent Person” as
defined in the 2012 edition of the Joint Ore Reserves Committee (JORC) Australasian Code for
Reporting of Exploration Results, Mineral Resources and Ore Reserves. Mr Moloney consents to the
inclusion in this report of the matters based on the information in the form and context in which it
appears.
Previously Reported Information – Graphite Bull Project
There is information in this announcement relating to exploration results previously announced on:
1. 25th July 2014 – 127 metres @ 13.4% TGC – Yalbra Graphite Drilling
2. 24th October 2014 – Buxton significantly expands Graphite Resource at Yalbra
3. 19th April 2023 – Graphite Bull Drilling Assays
PO Box 661
Nedlands WA 6009
15 Robinson Av
Belmont WA 6104
T: 08-9380 6063
E: info@buxtonresources.com.au
W: www.buxtonresources.com.au
Visit our investor hub: investorhub.buxtonresources.com.au
4. 25th July 2024 - 84.6m of mineralisation intersected at Graphite Bull Project
5. 26th August 2024 – Graphite Bull & Narryer Project - Exploration Update
6. 24th October 2024 – Graphite Bull: Record Setting 124 m @ 16.6% TGC
Validity of Referenced Results
Buxton confirms that it is not aware of any new information or data that materially affects the
information from previous ASX announcements which has been referenced in this announcement.
About the Graphite Bull Project
The at-surface, high-grade Graphite Bull Project is located in the Tier 1 mining jurisdiction of Western
Australia, Gascoyne region, on granted Exploration License E09/1985. Graphite Bull was acquired by
Buxton in 2012 and by 2014 two resource estimates were completed. The Graphite Bull project
currently has a JORC (2012) compliant Inferred Resource of 4 Mt @ 16.2 % TGC (ASX 24/10/2014).
Due to projected growth of the global Lithium-ion battery market, and the essential part graphite will
play in that – graphite is the single largest component of Li-ion batteries – Buxton recommenced work
at Graphite Bull in 2022. Work since then has been focused on metallurgical test work through to final
product (Activated Anode Material), and increasing Resource confidence and size, with very promising
results to date.
Benchmark Mineral Intelligence predicts that global capacity of anode material will increase over
fivefold between 2024 and the end of the decade, reach over 15Mtpa, a huge increase from the
2.3Mtpa of operational capacity in 2024. This battery-related demand means that by 2027, global
graphite production needs to double and that, by 2040, eight times current production will be
required to supply the world’s lithium-ion battery anode market. Ex-China battery anode capacity,
and investment, is being spurred by US IRA legislation. Graphite Bull is therefore a very attractive
project, being a high-grade deposit located in a Tier 1, US FTA mining jurisdiction, with ore materials
having demonstrated excellent electrochemical performance and with outstanding Resource growth
potential. Buxton has also recently confirmed the discovery of a new graphite mineral system at the
Blackhawk Project, some 100 km south from Graphite Bull.
PO Box 661
Nedlands WA 6009
15 Robinson Av
Belmont WA 6104
T: 08-9380 6063
E: info@buxtonresources.com.au
W: www.buxtonresources.com.au
Visit our investor hub: investorhub.buxtonresources.com.au
Figure 8: Buxton’s Graphite Bull & Blackhawk Projects are located within the Gascoyne / Murchison
Region of Western Australia.
PO Box 661
Nedlands WA 6009
15 Robinson Av
Belmont WA 6104
T: 08-9380 6063
E: info@buxtonresources.com.au
W: www.buxtonresources.com.au
Visit our investor hub: investorhub.buxtonresources.com.au
Table 2: Collar location details for 2024 DD and RC holes at Graphite Bull
Hole ID
GB006DD
GB007DD
GB008RC
GB009RC
GB010RC
GB011RC
GB012RC
GB013RC
GB014RC
GB015RC
GB016RC
GB017RC
GB018RC
GB019RC
GB020RC
GB021RC
GB022RC
GB023RC
GB024RC
GB025RC
GB026RC
GB027RC
GB028RC
GB029RC
GB030RC
GB031RC
GB032RC
GB033RC
GB034RC
PO Box 661
Nedlands WA 6009
Easting (m)
435128.62
435709.78
435187.90
435086.30
435092.84
435920.33
435870.39
435870.30
435750.11
435643.05
435751.26
435750.89
435983.58
435506.06
435388.23
435319.29
436110.53
435981.17
436116.01
435640.04
435632.20
435034.68
435124.99
435126.17
434966.54
434841.50
434912.74
435116.37
435394.02
Northing (m)
7172481.68
7172612.38
7172676.85
7172668.82
7172625.78
7172901.24
7172923.34
7172923.93
7172905.97
7172865.97
7172885.12
7172886.56
7172916.99
7172842.90
7172761.68
7172722.54
7172920.62
7172927.60
7172888.77
7172845.35
7172878.30
7172780.73
7172795.14
7172795.37
7172763.86
7172763.49
7172746.74
7172836.37
7172816.72
15 Robinson Av
Belmont WA 6104
RL (m)
384.17
381.30
375.56
381.96
384.41
387.18
385.35
384.99
384.60
385.69
387.30
387.00
385.33
379.52
377.81
374.65
388.89
385.29
390.14
386.09
384.37
378.93
375.42
375.38
378.96
374.83
380.91
374.55
383.30
Azimuth (grid)
337.56
336.3
345.43
348.01
346.38
348.24
345.78
345.17
345.1
342.68
343.2
345.09
341.22
344.8
344.92
343.63
340.36
343.57
340.56
347.24
344.27
344.76
344.72
164.6
344.09
344.3
344.55
344.69
335.07
Incl.
-66.58
-60.07
-61.67
-59.4
-60.97
-80.54
-80.31
-55.69
-60.69
-70.36
-75.38
-60.66
-75.49
-65.88
-65.26
-60.99
-61.2
-55.65
-60.54
-76.47
-55.78
-61.16
-67.73
-65.55
-60.53
-61.1
-60.63
-55.01
-60.61
Total Depth (m)
641.4
582.3
150
66
138
120
192
96
90
168
246
180
168
180
192
114
132
84
162
210
96
174
162
138
156
126
150
114
156
T: 08-9380 6063
E: info@buxtonresources.com.au
W: www.buxtonresources.com.au
Visit our investor hub: investorhub.buxtonresources.com.au
JORC Table: Section 1 – Sampling Techniques and Data
Criteria
JORC Code explanation
Commentary
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 (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.
Diamond core drilling and Reverse Circulation drilling
was completed using standard industry best practice.
Diamond drilling at Graphite Bull produced HQ diameter
core (63.5mm diameter). All core runs are oriented
using an Axis Mining Technology Champ Ori tool.
Diamond drilling core samples taken from halved or
quartered (for duplicate samples) HQ2 core. Samples
were cut at approximately 1 m intervals according to
recommendations from previous resource estimate
reports.
Reverse Circulation drilling was completed using
standard industry practices.
Reverse Circulation drilling produced samples that were
collected at one-metre intervals. Metre delineation was
controlled by the driller by means of visual marks on the
mast chain on rig. A one metre ‘split’ sample was
collected in pre-numbered calico bags at the time of
drilling using a cone splitter integrated into the drill
cyclone to produce a 1-3kg sample, which is considered
representative of the full drill metre.
The residual material from each metre interval was
collected in 600mm x 900mm biodegradable bags
preserved at the drill site whilst laboratory analysis is
ongoing.
All one metre split samples were sent to the laboratory
for preparation. Sample weights are recorded on
submission to the laboratory. A compositing program
was then undertaken under laboratory conditions such
that 250g pulp composites were prepared. These
composites were generally two-metre samples for
mineralised intervals (with some 1m samples where
required by QA sampling). Three, four, or five-metre
composites were then used either side of the two / one
metre intervals for analysis.
All 1m pulps and bulk rejects are preserved for further
testwork if required.
Laboratory analysis was undertaken by ALS
Geochemistry in Perth and include Total Graphitic
Carbon (see below).
Drilling techniques
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).
Diamond drilling by Topdrill PL used a Sandvik DE880
truck mounted drill rig. Reverse Circulation (RC) drilling
by Topdrill PL used a Schramm T685 truck mounted rig
(RC).
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.
Sample recovery for DD core loss is recorded by the
drillers with any core loss intervals noted on annotated
wooden blocks inserted into the core boxes by the
driller. Core loss averages 99.5% for the two holes. No
significant core loss is recorded in the reported
mineralised intervals.
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.
PO Box 661
Nedlands WA 6009
15 Robinson Av
Belmont WA 6104
Rod counts are routinely carried out and marked on the
core blocks by the drillers to ensure the marked core
block depths are accurate.
T: 08-9380 6063
E: info@buxtonresources.com.au
W: www.buxtonresources.com.au
Visit our investor hub: investorhub.buxtonresources.com.au
RC recoveries were considered good with available air
for drill sample recovery being deemed adequate for the
ground conditions and depth of sampling undertaken.
Appropriate measures have been undertaken to
maximise sample recovery and ensure the
representative nature of samples, including:
-
Terminating RC holes when recovery amounts
are reduced at depth
Terminating RC holes when excess water is
encountered
Full assessment of recovery will be undertaken when the
core is transported to BUX’s core processing facility in
Perth, with QA/QC of the recovery to be assessed by
reconstructing the core into continuous runs in an angle
iron cradle.
No apparent relationship has been defined between
sample recovery and grade based on the various drilling
programs to date at Graphite Bull.
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.
Diamond Drilling
Logging of the diamond drill hole was conducted at the
Project site by qualified geologists with sufficient
knowledge of the deposit style and the geological
terrane the drilling was completed in. Onsite logging of
diamond core includes recording observations of
lithology, mineralogy and mineralisation, which are
recorded digitally. Logging completed can be considered
qualitative in nature.
Further qualitative logging, conducted once the core was
transported to BUX’s core processing facility in Perth,
includes recording weathering, colour, and other
features of the samples, along with quantitative
measurement of magnetic susceptibility, density,
structure and geotechnical parameters, along with the
collection of spectral and portable XRF measurements.
Photographs of all DD trays have been taken at BUX’s
core processing facility at the Project, and in Perth and
retained on file with the original core trays stored at
BUX’s core library in Peth.
Logging to date can be considered sufficient to report
the intersection of low grade (trace-5% TGC), moderate
(5-10%) and high-grade (>10% TGC) graphite
mineralisation based on visually estimates and with
reference to previous drillhole samples and results.
Logging has been designed to be adequate to support
downstream exploration studies and follow-up drilling.
Reverse Circulation Drilling
For the RC program, chip trays were collected from each
one metre interval this was used to log lithology,
oxidation and visual graphite content estimate a streak
test was used to assist with visual estimates alongside
historical samples.
Visual estimates for TGC were based on comparison with
historic samples from Buxton’s 2014 program, YBRC0018
and YBRC0019 which constituted 276 metres of
previously assayed material with grades from 0.1% to
30.9% TGC. This included 52 samples greater than 10%
TGC. 19 samples from 5-10% and 87 samples from 0-5%.
PO Box 661
Nedlands WA 6009
15 Robinson Av
Belmont WA 6104
T: 08-9380 6063
E: info@buxtonresources.com.au
W: www.buxtonresources.com.au
Visit our investor hub: investorhub.buxtonresources.com.au
Samples were noted if they were wet or where recovery
was significantly impacted.
Photographs of all RC chip trays where then taken at
BUX’s core processing facility at the Project, and in Perth
and retained on file with the original chip trays stored at
BUX’s storage facility in Peth.
Logging is considered to be semi-quantitative.
Sub-sampling
techniques and
sample preparation
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.
The visual logging has been augmented by
lithogeochemical analysis using portable XRF data
collected on prepared pulps returned from ALS (for the
RC samples) and from analyses collected directly on
diamond core. Thorough statistical treatment of this
data was undertaken, including validation, mitigating
closure effects, k-means cluster analysis and principal
component analysis to generate a classification that was
verified firstly on the core logging and against other
quantitative data such as magnetic susceptibility and
density dataset. This lithological classification was then
utilised by a contract structural geologist, who had
undertaken ~2 weeks of surface mapping at Graphite
Bull, to develop a 3D solid geology model.
Diamond Drilling
Following core processing at BUX’s core processing
facility in Perth, the mineralised intervals will be
subsampled into quarter and/or half-core using a wetdiamond-blade core saw and submitted to ALS Limited Perth. All samples to be submitted for assay will be
selected from the same side of the core (with respect to
the orientation line, or principal foliation), with
exceptions only being for duplicate samples of selected
intervals, where quarter-core subsamples will be cut
from the half-core.
Reverse Circulation Drilling 2024
All RC one-metre sub-samples from drill holes were
collected from a cone splitter respectively, to produce an
~15% routine split sample for analysis. Field duplicates
were collected for the RC programs.
See below for further notes on quality control
procedures.
Samples were submitted to ALS Geochemistry for
sample preparation and analysis. Samples were
pulverised to better than 85% passing -75 micron and
analysed for %TGC by C- IR18 method where Graphitic C
is determined by digesting sample in 50% HCl to evolve
carbonate as CO2. Residue is filtered, washed, dried and
then roasted at 425C. The roasted residue is analysed for
carbon by oxidation, induction furnace and infrared
spectroscopy. This method has a lower detection limit of
0.02% TGC and an upper detection limit of 50% TGC.
Reverse Circulation Drilling 2023 & Total Carbon (TC) vs
Total Graphitic Carbon (TGC)
The 2023 results presented herein (from GB003RC and
GB004RC) were from RC drilling material collected in
essentially the same manner as described above, but
analysed for Total Carbon by C- IR07 method, this
involves induction furnace fusion digestion with total
carbon determined by oxidation, induction furnace and
infrared spectroscopy.
PO Box 661
Nedlands WA 6009
15 Robinson Av
Belmont WA 6104
T: 08-9380 6063
E: info@buxtonresources.com.au
W: www.buxtonresources.com.au
Visit our investor hub: investorhub.buxtonresources.com.au
A 32-sample suite has been analysed from 2013/2014
drilling sample which comprised ALS methods for Total
Carbon (C-IR07) and TGC (C-IR18), in addition to the
original Intertek TGC value (Leco furnace, equivalent to
C-IR18). Of these 32 samples, three (180901, 180480 &
61228) reported significant Total C vs TGC (Delta C)
variances > 1.25%. These samples also had the highest
Ca values in the dataset. The Delta C value (simple
difference in wt% abundance between methods) applied
to the 32 sample population also shows a strong
correlation with analytes (from Acid-Base Accounting
analyses on this same sample suite) including CO2, Fizz
Rating, NNP & NP. Potentially meaningful, but weaker
correlations are observed with Mg & Sr (positive) and Al
& Si (negative) from pXRF analyses of these same pulps.
These data are collectively interpreted to indicate that
some carbonate is present in the three outlier samples.
All three outlier samples are classified as Lith Group
“Ad”, which was probably originally a more carbonate
bearing sediment, compared with the “Ap” unit, which
would have been more pelitic. Two of the three Delta C
outlier samples were from very shallow depths (180901,
from 0 – to 1 m and 612287, from 3 – 4 m) and were
logged as “weathered”. The third, 180480, was from 2930 m and logged as “transitional”. This suggests the
possibility that carbonate may be more likely driven by
surficial weathering processes such as calcretisation,
rather than any incomplete de-volatilisation during
prograde metamorphism of originally calcareous
sediments. When these three samples are excluded
then the mean of the Delta C is approximately 0.15%, a
value which is within 1 Standard Deviation (SD) of the CIR07 method as indicated by the performance of 33
laboratory duplicates from the 2023 RC pr
Share your feedback
Discover