REG - Castillo Copper Ltd - Metallurgical test-work underway by ANSTO
13/04/2023 07:00
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RNS Number : 0385W Castillo Copper Limited 13 April 2023
13 April 2023
CASTILLO COPPER LIMITED
("Castillo", or the "Company")
MREO focused metallurgical test-work underway by ANSTO
Castillo Copper Limited (LSE and ASX: CCZ), a base metal explorer primarily
focused on copper across Australia and Zambia, is pleased to announce that it
has appointed specialist consultant, the Australian Nuclear Science and
Technology Organisation ("ANSTO")(1), to undertake metallurgical test-work on
six samples from Fence Gossan, Reefs and Tors Tanks Prospects within the BHA
Project's East Zone.
HIGHLIGHTS:
· Specialist consultant, ANSTO(1), has been appointed to undertake
comprehensive metallurgical test-work on six samples from Fence Gossan, Reefs
and Tors Tanks Prospects (BHA Project's East Zone) to understand the potential
to extract Rare Earth Elements ("REE") from shallow clay zones; results should
take 8-10 weeks
· The scope of work will focus on characterising REE leachability from
the six samples which comprise fresh pegmatite to highly weathered clay,
especially with Magnetic Rare Earth Oxide ("MREO") grades ranging from
362-603ppm (refer Appendix A)
· This is an important step towards advancing the viability of the BHA
Project's East Zone REE potential and securing interest from prospective
development partners, especially given the extent of high-value MREO
(Nd+Pr+Dy+Tb) within the system
· To recap, the best RC and diamond core assay result intercepts from
Tors Tank and Fence Gossan - across the shallow, clay-hosted, REE system(2) -
were:
o 13m @ 1,550ppm Total Rare Earth Oxides (TREO) from 5m; 38.9% MREO
(TT_005DD)(2) of the TREO grade vs 25% peer average(3)
o 17m @ 1,605ppm TREO from 2m; 28.6% MREO & 1m @ 3,236 TREO from 19m;
28.9% MREO (FG_003RC)(2)
o 10m @ 1,013ppm TREO from 49m; 24.7% MREO (FG_001RC)(2)
o 6m @ 1,480ppm TREO from 7m; 28.9% MREO (FG_004RC)(2)
o 5m @ 1,598ppm TREO from 14m; 29.1% MREO (TT_002RC)(2)
· Meanwhile, work on the Big One Deposit optimisation study and
updating the Cangai Copper Mine Mineral Resource Estimate is progressing on
schedule.
Ged Hall, Chairman of Castillo Copper, said: "The Board is delighted ANSTO is
conducting specialist metallurgical test-work on samples from the BHA
Project's East Zone. Understanding the potential to extract REE
mineralisation, especially MREOs, will greatly assist in our efforts to align
with a future development partner. Pleasingly, the work done to date clearly
confirms there is an extensive shallow REE system across the central part of
the BHA Project's East Zone."
ANSTO UNDERTAKING METALLURGICAL TEST-WORK
The scope of work that ANSTO will perform is designed to provide a deeper
understanding of the following:
· The potential to extract REE mineralisation from shallow clay zones;
· Characterising the REE leachability from the six samples which
comprise fresh pegmatite to highly weathered clay; and
· Separating out high-value MREO (Nd+Pr+Dy+Tb) as the grades in the
samples range from 362-603ppm MREO (Figure 1).
FIGURE 1: COMPOSITE SAMPLE DESCRIPTIONS FOR ANSTO TEST PROGRAMME
Drillhole Sample Number(s) From (m) To (m) Thick. (m) Comments on samples
TT_002RC CCZ03888-92 14.00 19.00 5.00 MREO = 466 ppm; highly weathered clay
TT_005DD CCZ04936-49 5.00 18.00 13.00 MREO = 603 ppm; highly weathered clay
FG_003RC CCZ04513-30 2.00 20.00 18.00 MREO = 459 ppm; highly weathered clay
FG_004RC CCZ04686-91 7.00 13.00 6.00 MREO = 427 ppm; highly weathered clay
RT_001RC CCZ03819-21 14.00 17.00 3.00 MREO = 466 ppm; highly weathered clay
RT_001RC CCZ04869 64.00 65.00 1.00 MREO = 362 ppm; fresh pegmatite
Note: MREO elements (Nd+Pr+Dy+Tb)
Source: REE Analyses using ALS Method ME-MS81
The Board believes this is a crucially important step towards materially
advancing the viability of the BHA Project's East Zone. Furthermore, robust
metallurgical test-work results for high-value MREO mineralisation should aid
securing interest from prospective development partners.
Assay result recap
To recap, diamond core drill-hole from the Tors Tank Prospect returned an
excellent assay result:
· 13m @ 1,550ppm TREO from 5m; 38.9% MREO (TT_005DD)(2)
Notably, the high value MREO reading was well above the 25% average among the
peer group(2).
Re-assays of 1m samples from the Tors Tank and Fence Gossan Prospects
re-affirmed high MREO percentages (Figure 2) and provided clearer evidence
there is an extensive, shallow REE mineralisation system across the centre of
the BHA Project's East Zone (refer Appendix B & C).
FIGURE 2: BEST "RC" INTERCEPTS TORS TANK / FENCE GOSSAN
Hole From (m) To (m) Width (m) TREO (ppm) MREO (%)
TT_001RC 25 27 2 1,048 27.1%
TT_002RC 14 19 5 1,598 29.1%
TT_003RC 4 11 7 890 34.6%
12 13 1 1,103 28.4%
15 17 2 3,491 24.6%
FG_001RC 8 20 12 907 31.0%
49 59 10 1,013 24.7%
FG_002RC 11 16 5 1,065 28.9%
FG_003RC 2 19 17 1,605 28.6%
19 20 1 3,236 28.9%
FG_004RC 7 13 6 1,480 28.9%
28 32 4 1,342 22.9%
Source: CCZ geology team
In addition, hand auger surface sampling assays delineated a sizeable (circa
4.5km(2)) anomalous REE zone around the Fence Gossan Prospect.
For further information, please contact:
Castillo Copper Limited +61 8 6558 0886
Dr Dennis Jensen (Australia), Managing Director
Gerrard Hall (UK), Chairman
SI Capital Limited (Financial Adviser and Corporate Broker) +44 (0)1483 413500
Nick Emerson
Gracechurch Group (Financial PR) +44 (0)20 4582 3500
Harry Chathli, Alexis Gore, Henry Gamble
About Castillo Copper
Castillo Copper Limited is an Australian-based explorer primarily focused on
copper across Australia and Zambia. The group is embarking on a strategic
transformation to morph into a mid-tier copper group underpinned by its core
projects:
· A large footprint in the Mt Isa copper-belt district, north-west
Queensland, which delivers significant exploration upside through having
several high-grade targets and a sizeable untested anomaly within its
boundaries in a copper-rich region.
· Four high-quality prospective assets across Zambia's copper-belt
which is the second largest copper producer in Africa.
· A large tenure footprint proximal to Broken Hill's world-class
deposit that is prospective for zinc-silver-lead-copper-gold and platinoids.
· Cangai Copper Mine in northern New South Wales, which is one of
Australia's highest grading historic copper mines.
The group is listed on the LSE and ASX under the ticker "CCZ."
Competent Person's Statement
The information in this report that relates to Exploration Results for "BHA
Project, East Zone" is based on information compiled or reviewed by Mr Mark
Biggs. Mr Biggs is a director of ROM Resources, a company which is a
shareholder of Castillo Copper Limited. ROM Resources provides ad hoc
geological consultancy services to Castillo Copper Limited. Mr Biggs is a
member of the Australian Institute of Mining and Metallurgy (member #107188)
and has sufficient experience of relevance to the styles of mineralisation and
types of deposits under consideration, and to the activities 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, and Mineral Resources. Mr Biggs holds an AusIMM Online Course
Certificate in 2012 JORC Code Reporting. Further, Mr Biggs consents to the
inclusion in this report of the matters based on information in the form and
context in which it appears.
References
1) ANSTO. Available at:
https://www.ansto.gov.au/services/resources-sector/minerals
2) CCZ ASX Release - 23 November 2022, 15 & 28
February 2023
3) Nelson, S. "Rare earths rush showed no signs of abating in Q4 2022" 6
February 2023. Available at:
https://www.proactiveinvestors.com.au/companies/news/1005217/rare-earths-rush-showed-no-signs-of-abating-in-q4-2022-1005217.html
Appendix References:
4) Total REE extraction is not necessarily the best
indicator as the individual REE's will likely dissolve to different extents,
and the value of the individual REE's varies significantly (the most valuable
are Nd, Pr, Tb, and Dy).
5) Mt Weld, Peak Resources, Arafura, Northern, Hastings
and Iluka.
6) Hydrochloric acid is an alternative, but sulfuric
acid is preferred based on cost.
7) Higher temperatures can be tested in further work, but
higher temperature accelerates gangue dissolution and adds to costs,
particularly for a low-grade clay feed at a relatively low slurry density.
Clay processing is probably limited to a slurry density of ~35 wt%.
8) NaCl and MgSO4 are also potential adsorbents, but
ammonium sulphate is typically the best for a true ionic clay. Other options
could consider the concentration being decreased. These are possible options
for later stages of testing.
APPENDIX A: METALLURGY TESTING AT ANSTO STARTED
BACKGROUND AND SCOPE
Castillo recently identified clay-hosted REE mineralisation across the Fence
Gossan, Tors and Reefs Tanks Prospects. Since then, initial flotation tests
show the REE minerals can be separated from the clays and hard rock (such as
monazite) by flotation to produce a higher-grade concentrate (2-3 times REE
enrichment). The next step in this process is to develop an understanding of
the potential to extract the REE's contained in the clay zones.
Castillo has engaged ANSTO to progress a work programme that characterises the
REE/clay mineralisation with respect to leachability for six samples ranging
from fresh pegmatite to highly weathered clay (see Figure A1). Note, the MREO
(Magnetic REE's - Pr, Nd, Tb, Dy) grades of the samples supplied vary from 362
‑ 603 ppm.
FIGURE A1: COMPOSITE SAMPLE DESCRIPTIONS FOR ANSTO TEST PROGRAMME
Drillhole Sample Number(s) From (m) To (m) Thick. (m) Comments on samples
TT_002RC CCZ03888-92 14.00 19.00 5.00 MREO = 466 ppm; highly weathered clay
TT_005DD CCZ04936-49 5.00 18.00 13.00 MREO = 603 ppm; highly weathered clay
FG_003RC CCZ04513-30 2.00 20.00 18.00 MREO = 459 ppm; also, Preliminary Met ALS Perth sample; highly weathered clay
FG_004RC CCZ04686-91 7.00 13.00 6.00 MREO = 427 ppm; highly weathered clay
RT_001RC CCZ03819-21 14.00 17.00 3.00 MREO = 466 ppm; highly weathered clay
RT_001RC CCZ04869 64.00 65.00 1.00 MREO = 362 ppm; fresh pegmatite
Note: MREO elements (Nd+Pr+Dy+Tb)
Source: REE Analyses using ALS Method ME-MS81
Key questions to answer are the proportion of ionically adsorbed REEs and
potential for increased extraction by a simple direct acid leaching approach.
OBJECTIVES OF THE WORK PROGRAMME
The main objective of the work programme is to assess the leachability of REEs
from clay samples over a range of pHs. The specific tasks in the scope are:
1. Drying of as-received samples and preparation for compositing, assay,
and leach tests.
2. Head assays on six samples (XRF, fusion digest/MS).
3. Carry out a diagnostic leach on the six samples using ammonium
sulphate (AS) at pH 4.
4. Carry out a diagnostic leach tests on six samples using ammonium
sulphate at pH 1 (in sulfuric acid).
5. Provision of a data pack, with a summary note and discussion of the
main findings.
Chondrite normalised plots below (Figure A2) for two individual samples from
the composites listed in Figure A1 shows the assays plot as expected, and the
slope of the plot is typical for this deposit type. Figure A2 would tend to
indicate the REEs are not solely present as monazite.
FIGURE A2: CHONDRITE NORMALISED PLOTS FROM TWO FENCE GOSSAN SAMPLES
Source: Ansto 2023
CLAY REE DEPOSITS
The so-called REE ionic clay deposits ("IADs") are commercially leached in
China and Myanmar as a major source of heavy REEs. A feature of the IADs is
the REE's are present as physically adsorbed ions which can be readily
solubilised by displacing the REE ions with an appropriate cation. Typical
desorption conditions are contact with 0.3-0.5 ammonium sulphate at pH 4-5 for
~ 30 minutes at ambient temperature, 20-30 wt% solids. Under these
conditions up to 70% extraction (typically 40-60%) of the TREO + Y can be
obtained, with very little dissolution of gangue elements, which makes for
simple downstream processing to produce a mixed REE carbonate.
Over the last few years, there have been numerous reports of elevated
concentrations of REE's associated with clays, but in most cases the deposits
have not proven to be of the classic ionic clay type, and a lower pH has been
found to be necessary to dissolve the REE's. Under these circumstances, the
economics of the process will depend on REE extraction, acid consumption and
the concentrations of dissolved gangue elements.
The objective of the current studies is to obtain an initial indication of
potential economic viability by leaching under desorption conditions (pH 4)
and a lower pH to determine REE extraction(4) versus gangue dissolution.
ANSTO: BACKGROUND IN RE PROCESSING
The minerals group at ANSTO has extensive experience in REE process
development, with several experts in their organisation having >30 years'
experience that dates back to some early work on the Mt Weld deposit (monazite
mineralogy) in the early 1990s. Over the last 10 to 15 years, ANSTO has worked
on numerous REE projects both in terms of process development, piloting(5) and
providing expert advice.
ANSTO have experience in the processing of monazite, bastnasite, and xenotime,
as well as from less frequently exploited REE sources such as apatite, ionic
clays and complex ores containing zirconium/niobium silicates. Further, ANSTO
have undertaken process development work for clients in Australia and across
the globe. Their work has included all facets of REE process flowsheets,
including acid leaching, sulfation baking, caustic conversion, alkaline
roasting, selective precipitation, impurity removal, solvent extraction, ion
exchange, process water treatment (softening) and chemical concentrate
production. Incrementally, ANSTO are experts in the deportment and the
management of radioactivity in the REE process flowsheets, and all
radionuclide analyses are carried out in-house (as well as standard REE
elemental assays).
PROPOSED APPROACH
Desorption response
Diagnostic tests (pH 4) will be carried out on the six supplied samples under
classic ionic clay conditions to confirm extractions. This is recommended as
the ability to use desorption conditions would have many advantages.
Leach response
A diagnostic test will be carried out with ammonium sulphate at pH 1 on all 6
samples to determine if the REEs can be extracted at "moderate" acidity.
Conditions will be ammonium sulphate+ sulfuric acid(6) at pH1 for 2h at
ambient temperature(7). Note, pH 1 conditions will indicate a limit for
extraction, with economic conditions likely to be at a higher pH (preferably
pH ~4). Note, that pH 1 conditions will not dissolve primary REE minerals
such as monazite or xenotime.
All diagnostic tests are carried out on pulverised samples at high L/S ratio,
where there are no effects of adsorption, co-precipitation etc. These tests
will indicate the maximum extraction that could be achieved under the test
conditions (at more practical lower L/S ratios, extraction could be less).
Slurry leach tests are not recommended at this stage as several other
variables are introduced, which would need some degree of optimisation that is
not warranted at this early stage of the work.
WORK PROGRAMME
Sample preparation
The samples are composites from drill holes in the three prospects in the East
Zone. The supplied samples will be dried at 50°C to constant weight, crushed
to < 1 mm, if necessary. A 250-500 g sub-sample will then be taken,
pulverised, and split into representative portions for head assay and leach
tests. The remainder of the composites will be stored.
Sample characterisation
The head samples (dried at 105°C) will be analysed by a combination of XRF
(in-house) and fusion digest/ICP‑MS (ALS, Brisbane) for the following
elements:
· XRF - Al, Ca, Cu, Fe, K, Mg, Mn, Na, P, S, Si, Zn
· Digest/ICP-MS - Ag, Ce, Co, Dy, Er, Eu, Gd, Ho, La, Lu, Nd, Pb, Pr,
Sc, Sm, Tb, Th, Tm, U, Y, Yb
LEACH TESTS
Desorption conditions
Diagnostic leach tests on all samples will be conducted under following
desorption conditions:
· 0.5 M ammonium sulphate(8) as lixiviant;
· pH 4.
· 0.5 h.
· Ambient temperature (~22°C); and
· 4 wt% solids density.
Prior to commencing the leach test-work, a bulk solution of AS will be
prepared, and the pH will be adjusted to the appropriate target using
H(2)SO(4).
All tests will be conducted on 80g of dry (dried at 50°C), pulverised sample
and 1,920g of the lixiviant in a 2L titanium/ stainless steel baffled leach
vessel equipped with an overhead stirrer. No thief samples will be taken. The
pH for the duration of the test will be maintained by addition of 1M
H(2)SO(4), if necessary.
At the completion of each test, the slurry will be vacuum filtered to separate
the leach liquor. The final residue solids will be thoroughly water washed on
the filter with 200mL of DI water, and dried at 105°C. The individual REE
recoveries for each sample will be calculated using the measured head and the
final leach liquor composition. The final leach liquors will be analysed as
follows:
· ICP-MS for Ag, Ce, Co, Dy, Er, Eu, Gd, Ho, La, Lu, Nd, Pb, Pr, Sc,
Sm, Tb, Th, Tm, U, Y, Yb (ALS).
· ICP-OES for Al, Ca, Cu Fe, K, Mg, Mn, Na, P, S, Si, Zn (in-house).
The water wash will be collected, and a sub-sample will be stored but not
analysed. The final washed residue will be stored, but not analysed.
Acid leach conditions
A diagnostic leach tests will be conducted on all samples under the following
conditions:
· 0.5 M ammonium sulphate as lixiviant.
· pH 1.
· 2 h.
· Ambient temperature (~22 °C); and
· 4 wt% solids density.
The leach will be conducted on a pulverised sample. Sulfuric acid will be
added to control pH. Prior to commencing the leach test work, a bulk AS
solution will be prepared, and the pH adjusted to the target using H(2)SO(4).
Each of the leach tests will be conducted on 80g of dry, pulverised sample and
1,920 g of the lixiviant in a 2L titanium/ stainless steel baffled leach
vessel equipped with an overhead stirrer. No thief samples will be taken
during the tests. The pH for the duration of the test will be maintained by
addition of conc H(2)SO(4), if necessary. The acid addition for each test will
be measured.
At the completion of each test, the slurry will be vacuum filtered to separate
the leach liquor. The final residue solids will be thoroughly water washed
on the filter with 200mL of DI water, and dried at 105°C. The individual
final RE recoveries will be calculated using the head and the final leach
liquor composition, and the head and leach residue assays.
The final liquor samples will be analysed as indicated in Gangue element
concentrations will give an indication of acid consumption.
The leach residue samples will be analysed by XRF (at ANSTO) and digest/ICP-MS
(lithium tetraborate method) at ALS, for the elements specified in the sample
characterisation section. The water wash will be collected, and a sub-sample
will be stored but not analysed.
APPENDIX B: ALS PERTH FG COMPOSITE 1M DATA
One of the samples delivered for the ANSTO sampling and testing programme is
over the same interval as the composite sample used for the ALS Perth hard
rock metallurgy programme.
This comprised a composite sample of RC chips from Fence Gossan drillhole
FG_003RC was constructed over the interval from 0-20m (reference). The
material reported over that interval had lithology logged as clay, haematite,
goethite, and extremely weathered pegmatite. The main hard rock rare earth
element-containing minerals are thought to be monazite, allanite, xenotime,
and maybe baryte or celsian (to account for the high barium contents of some
samples).
These assumptions need to be tested by XRD and/or QEM-SEM testing. The
composite was made up of 1m samples tested using ME-MS81 analysis method (the
results for which are provided in Figure B1).
FIGURE B1: DRILLHOLE FG_003RC - 0 TO 20M COMPOSITE USED FOR ALS PERTH
METALLURGICAL TESTING, 1M ANALYSIS
Sample From To Length PGM-MS23 PGM-MS23 PGM-MS23 ME-MS81 ME-MS81 ME-MS81 ME-MS81 ME-MS81 ME-MS81 ME-MS81 ME-MS81 ME-MS81 ME-MS81 ME-MS81 ME-MS81 ME-MS81 ME-MS81 ME-MS81 ME-MS81 ME-MS81 ME-MS81 ME-MS81 ME-MS81 ME-MS81 ME-MS81 ME-MS81 ME-MS81 ME-MS81 ME-MS81 ME-MS81 ME-MS81 ME-MS81 ME-MS81 ME-MS81 ME-MS81
Number
Au Pt Pd Ba Ce Cr Cs Dy Er Eu Ga Gd Hf Ho La Lu Nb Nd Pr Rb Sc Sm Sn Sr Ta Tb Th Ti Tm U V W Y Yb Zr
m m m ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm % ppm ppm ppm ppm ppm ppm ppm
CCZ04511 0 1 1 0.002 0.001 0.002 297 131 61 3.13 6.48 3.92 1.71 23.5 7.17 5.56 1.35 70 0.58 10.85 54.8 16.1 67.5 16.4 10.3 3.2 128 0.9 1.18 12.85 0.49 0.59 4.02 190 3.1 37 3.69 223
CCZ04512 1 2 1 0.006 0.0013 0.003 910 172.5 73 2.58 7.57 4.05 2.16 38.1 8.71 4.09 1.52 97.5 0.46 10.55 74.2 21 51.2 20 12.35 2.4 180 0.8 1.28 13.65 0.41 0.55 7.54 247 4 35.3 3.39 134
CCZ04513 2 3 1 0.004 0.0011 0.002 648 696 71 2.64 20.9 9.3 9.12 46.2 34.4 4.18 3.6 409 0.93 12.75 347 94.2 51.7 19.4 52.8 3.2 126 1 4.53 14.55 0.38 1.18 15.65 191 4.4 76.9 7.01 137
CCZ04514 3 4 1 0.002 0.0007 0.001 166.5 580 72 5.2 17.85 6.75 7.5 55.9 28.5 3.02 2.76 369 0.54 10.4 276 74.4 92.2 37.5 41.8 3.5 129.5 1 3.79 16.3 0.33 0.84 13.85 171 2.8 50.3 5.02 109
CCZ04515 4 5 1 0.002 0.0007 0.001 143 511 80 5.01 16.35 6.43 6.46 51.2 25.9 3.39 2.67 336 0.63 13.85 252 67.4 89.1 27.5 38.7 4.3 109.5 1.2 3.52 14.95 0.4 0.78 12.5 178 2.8 53.6 5.09 110
CCZ04516 5 6 1 0.001 0.0008 0.001 98.4 376 75 3.04 10.5 3.86 3.91 53.5 17.5 3.05 1.62 229 0.36 12.8 175.5 46.6 51.2 14.7 25.9 3.5 91.3 1.1 2.28 16.25 0.38 0.55 7.46 129 3.7 30.9 2.88 100
CCZ04517 6 7 1 <0.001 0.0008 0.001 91.9 480 76 3.89 13.75 4.51 5.55 54.5 22.4 3.37 2.03 293 0.47 11.9 221 59.8 78.9 14.7 33.2 2.6 99.1 1 2.98 16.35 0.34 0.57 9.41 106 4.3 35.8 3.23 110
CCZ04518 7 8 1 <0.001 0.0007 0.001 59.1 332 90 3.2 8.64 3.14 3.43 60.5 14.3 3.18 1.33 204 0.28 15.4 142.5 39.3 79.8 11.6 22.6 3.2 101 1.2 1.88 18.25 0.38 0.38 7.65 102 6.3 25.5 2.31 107
CCZ04519 8 9 1 <0.001 0.0007 0.001 87.2 422 88 5.13 12.5 5.17 4.67 53.4 19 2.97 2.05 258 0.6 12.55 184.5 49.7 121 16.7 29 3.6 100 1.2 2.58 14.9 0.35 0.71 10.7 140 3 43.1 4.57 99
CCZ04520 9 10 1 <0.001 0.0008 0.001 94.5 287 78 5.62 7.68 3.76 2.49 56.5 10.55 2.62 1.37 175 0.49 13.2 116.5 31.3 160.5 19.6 16.3 3.5 84.7 1.1 1.5 14.3 0.32 0.55 8.74 150 2.2 28.2 4.08 87
CCZ04521 10 11 1 0.001 0.0007 0.001 110.5 366 81 6.57 8.9 4.09 3.31 48.3 14.05 2.56 1.69 231 0.55 10.95 145.5 42.6 196 20.4 21.6 4.1 89.8 0.9 1.96 14.5 0.31 0.59 12.1 149 1.7 33.6 3.97 87
CCZ04522 11 12 1 <0.001 0.0007 0.001 118.5 384 90 6.47 12.3 6.33 3.66 58.3 16.7 2.95 2.2 258 0.92 13.1 158.5 43.4 171.5 20.2 24 3.7 117 1.1 2.28 19.6 0.34 0.96 15.85 149 3.5 50.9 6.62 99
CCZ04523 12 13 1 <0.001 0.0007 0.001 88.6 292 85 3.63 9.33 5.15 2.71 57.2 12.45 3.51 1.79 202 0.61 12.7 117 32.1 108.5 21.4 16.55 3.1 98.9 1.1 1.79 17.65 0.34 0.73 11.2 101 6.3 38.4 4.72 116
CCZ04524 13 14 1 <0.001 0.0007 0.001 98.8 318 81 5.38 12.6 5.77 4.14 56.9 17.65 2.9 2.28 233 0.68 13.15 145.5 38.3 131 20.4 22.3 5 103.5 1 2.28 17.3 0.33 0.79 12.5 136 4 49 4.78 97
CCZ04525 14 15 1 <0.001 0.0009 0.001 45.7 486 91 4.58 17.9 6.78 5.7 63 28.4 3.06 2.93 341 0.61 12.45 222 59.1 98.8 15.7 35.2 4.3 88.2 1.1 3.64 18.45 0.36 0.81 14.2 170 3.5 57 5 95
CCZ04526 15 16 1 <0.001 0.0008 0.001 69.4 577 71 9.24 29 13.5 7.19 61.2 38.1 3.58 5.31 427 1.5 11.4 266 68.9 143.5 19.2 41.5 4.3 81.2 1 5.56 18.25 0.31 1.78 20.7 184 2.7 115.5 11.75 113
CCZ04527 16 17 1 0.001 0.0025 0.002 53.4 453 67 5.76 23.3 11.35 5.34 47.1 28 4.04 4.32 322 1.29 10.1 195 50.9 84.4 17.6 30.9 3.5 64.9 0.9 4.24 12.7 0.27 1.54 19.1 147 3.6 95.8 9.92 142
CCZ04528 17 18 1 0.003 0.0017 0.002 118 698 53 17.75 30.3 14.65 7.91 48.2 40.5 1.46 5.72 466 1.5 5.57 303 81.5 139.5 17.8 47 3.8 51.4 0.4 5.61 6.91 0.15 1.98 38.1 498 4.2 137 12.55 53
CCZ04529 18 19 1 0.045 0.002 0.002 109 774 54 6.11 42.4 16.05 12.35 40.3 60.8 1.61 6.9 644 1.36 6.51 425 106.5 52 38.5 66 5.7 110 0.4 8.47 4.76 0.74 1.94 73.4 580 3 128 11.6 50
CCZ04530 19 20 1 0.005 0.0011 0.001 193 661 60 2.69 104.5 69.3 15.6 25.8 100 2.98 23.8 597 8.34 7 403 94.2 32.7 41.9 72.2 1.5 146 0.4 16 1.57 1.11 9.13 48.7 442 1.1 722 57.8 94
Average 180.0 449.8 74.9 5.4 20.6 10.2 5.7 50.0 27.3 3.2 3.9 308.1 1.1 11.4 211.2 55.9 100.1 21.6 33.0 3.6 105.0 0.9 3.9 14.2 0.4 1.3 18.2 208.0 3.5 92.2 8.5 108.1
Notes:
1. Source: ALS Adelaide methods ME-MS81 and PGM-MS23 used.
2. Drillhole FG_003RC drilled October 2022.
APPENDIX C: BHA PROJECT'S EAST ZONE
FIGURE A1: BHA PROJECT's EAST ZONE - REE EXPLORATION FOOTPRINT
Source: CCZ geology team
FIGURE A2: BHA PROJECT
Source: CCZ geology team
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