VTM Unveils Major Gallium Resource as By-Product to HREEs
ASX RELEASE
17 April 2025
Victory Unveils Major Gallium Resource as By-Product to HREEs
Victory Metals Ltd (ASX:VTM, Victory or the Company) is pleased to announce a significant
enhancement to its Mineral Resource Estimate (MRE) at the North Stanmore project, with the
inclusion of Gallium Oxide (Ga₂O₃).
This strategic addition further strengthens the Company’s diversified critical minerals portfolio and
positions Victory as a potential dependable Western supplier of metals currently under tight global
supply due to Chinese export restrictions.
HIGHLIGHTS
•
Victory has added 4,788 tonnes of Gallium Oxide (Ga₂O₃) to its updated Mineral Resource
Estimate (MRE) at the North Stanmore project, which now stands at 247.5 million dry metric
tonnes at 520 ppm Total Rare Earth Oxide plus Gallium Oxide at 26 ppm (TREOSc2O3 +
Ga₂O₃) (Inferred and Indicated)
•
Gallium oxide has a current market price of approximately AUD $770/kg1
•
North Stanmore now includes seven critical metals that are currently subject to Chinese
export restrictions, all of these restricted critical metals have been recovered during
testwork in Victory’s Mixed Rare Earth Carbonate (MREC). These include:
o Heavy Rare Earths (HREEs): Gadolinium (Gd), Terbium (Tb), Dysprosium (Dy),
Lutetium (Lu), Yttrium (Y)
o Light Rare Earths (LREEs): Samarium (Sm)
o Strategic By-product: Gallium (Ga), Scandium (Sc)
•
Gallium is a critical technology metal used in AI chips, semiconductors, quantum computing,
defence systems, LEDs, and solar panels – with global supply tightly controlled, particularly
by China
•
Gallium is recovered concurrently with Victory’s Mixed Rare Earth Carbonate (MREC) no
additional processing required, making it a cost-effective by-product
•
Addition of Gallium enhances the value and strategic appeal of Victory’s Mixed Rare Earth
Carbonate (MREC), although the Company remains firmly focused on its high ratios of
heavy rare earths as the core revenue drivers
•
Victory is now one of the few companies in Australia with a declared Gallium Oxide
Mineral Resource, further positioning the Company as a globally relevant and potential
diversified critical minerals supplier
1 price
https://www.fastmarkets.com/insights/chinas-gallium-export-control-continues-to-squeeze-market-despite-higher-decemberexports/?utm_source=chatgpt.com); USD/AUD conversion rate of 0.65 applied
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•
Downstream engagement and offtake discussions are being expanded to reflect this new
opportunity, with Gallium now included as a bonus value stream in strategic planning
Victory’s CEO and Executive Director Brendan Clark commented:
“The addition of Gallium to the MRE is an incredible bonus, not a dependency. Our focus remains on
developing a world class heavy rare earth project, but the ability to recover Gallium concurrently
through our recovery process without additional complexity significantly enhances the value
proposition.
Gallium is a strategic technology metal with growing global demand, and its inclusion as a by-product
positions Victory as an even more attractive partner for downstream and offtake discussions.”
April 2025 MRE update
On 16 January 2025, Victory announced an updated Mineral Resource Estimate (MRE) for its North
Stanmore Heavy Rare Earth Elements (HREE) Project in Western Australia (January 2025 MRE). The
January 2025 MRE stood at 247.5 million dry metric tonnes at 493 ppm Total Rare Earth Oxide plus
Scandium Oxide (TREO + Sc2O3) and Ga2O3 @ 26ppm, (Inferred and Indicated), using an economic
cut-off grade of 330ppm TREO plus Scandium Oxide, inclusive of high-grade domain (≥600 ppm TREO
cut-off) of 53 million tonnes @ 1,012 ppm TREO plus Sc2O3 (Inferred and Indicated) (Figure 2).2
Victory subsequently commissioned further Mixed Rare Earth Carbonate (MREC) production activities
to optimise recovery conditions for Gallium Oxide (Ga₂O₃) while maintaining the heavy rare earth
element (HREE) distribution in the final MREC product.
On 26 March 2025, Victory announced the successful production of Gallium (Ga) in its final MREC
product from North Stanmore. Gallium confirmed in final MREC product at 258 g/t Ga₂O₃, successfully
recovered using low-CAPEX leaching process and recovery occurring concurrently with REEs requiring
no additional processing stages.3
Victory then commissioned MEC Pty Ltd (MEC) in April of 2025 to update the January 2025 MRE to
include Gallium oxide given the recent MREC Gallium recoveries.
Updated April MRE Information
The April 2025 MRE update was estimated within the boundaries of ten tenements; E20/0544,
E20/871, E20/971, E20/1016, E20/2468, E20/2469, P20/0543, P20/2007, P20/2153, and P20/2403,
with all tenure held by Victory Cue Pty Ltd, a wholly owned subsidiary of Victory (Figure 1).
2
3
Refer to ASX Announcement of 16 January 2025 for further details.
Refer to ASX Announcement of 26 March 2025 for further details.
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Figure 1: North Stanmore MRE by ResCat
Figure 2: Cross section 6,973,900mN, looking north, 5x vertical exaggeration and showing the High-Grade intercept.
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A site visit was conducted on May 30, 2024, by MEC Manager of Resources, Mr Dean O’Keefe and
MEC Resource Geologist, Mr Issam Digais, accompanied by Victory Metals personnel including Mr
Savvas Hagiantoniou, Exploration Site Supervisor. Dean O’Keefe is an MEC Competent Person for the
North Stanmore MRE. During the site visit the general layout of the area and project location was
checked. MEC also conducted a check survey of drillhole collar locations, the surveyed locations were
confirmed as being in close proximity to the planned drillhole locations, all within 3m. No production
has occurred at the North Stanmore site.
The North Stanmore MRE occurs in regolith above an alkaline intrusion. Despite its magnetic
signature, the North Stanmore intrusion had not been recognised previously on regional geological
maps. Petrological data for samples of diamond core confirm its alkaline character and indicate that
the intrusion is post-tectonic and hence, post-Archean in age.
The North Stanmore Intrusion is a large (approximately 16km by 5km) differentiated ultramafic to
felsic intrusion. Lithologies identified in thin section include kaersutite and carbonate-bearing
peridotite, orthopyroxenite, clinopyroxenite, leuco- and leuco-gabbro (ijolite), diorite, monzonite and
syenite. Some regolith samples are strongly LREE enriched indicating that the intrusion also contains
carbonatite. However, the uniformly high HREO/TREO of the regolith (of approximately 34% to 38%)
indicates that carbonatite represents a subordinate phase in the intrusion.
The North Stanmore Intrusion is interpreted to be associated with an early Proterozoic plume track
that was responsible for alkaline magmatism extending in a broad belt from Mt Weld carbonatite
near Laverton through Leonora to Cue.
The rare earth element mineralisation occurs in a relatively flat-laying saprolite-rich clay horizon
beneath a veneer of unconsolidated colluvium that ranges in thickness from 0–36m. The uniformity
of Nb/Ta ratios (Nb/Ta 16±4) in the regolith above the North Stanmore Intrusion indicates that the
regolith developed in situ. Importantly, studies have shown that Nb/Ta ratio of regolith over
carbonatites and other alkaline intrusions closely resembles the Nb/Ta ratio of their source plume
generated lithologies.
REEs are adsorbed onto kaolinite or form secondary REE phosphates, rhabdophane (after monazite),
churchite (after xenotime), and florencite. QEMSCAN mineralogical studies show that the REEs are
mainly hosted by <20µm particles.
Scandium oxide (Sc2O3) is enriched throughout the regolith profile due to the breakdown of pyroxene
in the North Stanmore source lithologies. Scandium oxide is generally considered to behave
differently to the REEs, which are adsorbed as outer-sphere complexes on clay surfaces, found in
Al(OH)2SiO sites, or occur as hydrated REE bearing phosphates. However, Sc3+ behaves like the
transition metals (Ni2+ , Co2+, Cu2+) and, due to its smaller ionic radius, it adsorbs onto vacancy sites
in clay lattices or attaches to the surface of Mn oxides.
Scandium is a highly valuable critical element occurring in the same Group of the Periodic Table (Gp.
3B) as the lanthanides. It occurs predominantly in HREE bearing ultramafic and mafic igneous rocks
like the North Stanmore Intrusion. By contrast, felsic alkaline rocks and granitoids are more LREE
enriched and contain negligible amounts of Scandium. The chemical properties of Scandium are
distinct from the other REO’s and Scandium has recently been recognised to have superconducting
properties. Scandium has been deemed a critical mineral due to current Chinese and Russian control
of the supply chain.
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Yttrium is classified as a REO because of its similar ionic radius to the lanthanides, and similar chemical
properties to the HREEs.
A geological cut-off grade of 150ppm TREO + Sc2O3 was used to separate mineralised material (MIN)
from weakly mineralised material (WMM). A high-grade mineralisation (HGMIN) domain was
additionally modelled above a geological cut-off grade of 600ppm TREO + Sc2O3.
Logging was completed for 90% of the sample intervals and used to produce surfaces to delineate the
colluvium, saprolite, and basement.
Drilling at North Stanmore to support the April 2025 MRE includes seven hundred and fifty-five (755)
drillholes for 42,118.9m, inclusive of 694 Air-core (AC) drillholes for 38,188m, 50 Reverse Circulation
(RC) drillholes for 3,166m, and 11 diamond drill holes for 764.9m. Drillhole depths range from 10m
to 222m. All drillholes were completed by Victory from 2022 to 2024. The drillhole spacing at North
Stanmore (MRE area) ranges from 50m x 50m to 250m x 100m.
Eleven percussion (air core and RC) drillholes have been twinned with diamond drilling (DD001 to
DD011). Samples were submitted to the laboratory for analysis only where the initial screening by
handheld XRF generated a mineralised value, whereas the diamond drilling was sampled and assayed
along the entire length of the drillhole. There is good spatial comparison between the percussion and
diamond assays for the twin drilling. The use of the handheld XRF tool is a reasonable indicator of
zones of mineralisation within the percussion holes.
Local validation was completed by comparing the composite grades used to estimate the block values
against the estimated block values. There was close correlation between composite assays and
estimated block grades, with some small differences resulting from the smoothing effect of ordinary
kriging. Min/max checks were utilised to ensure all blocks were populated. OBM validation functions
were used to check for overlapping blocks, there were no incidence of overlapping blocks.
The Resource has been classified as Indicated and Inferred categories, in accordance with the 2012
Australasian Code for Reporting of Mineral Resources and Ore Reserves (JORC Code). Unclassified
material based on sparse exploration data has not been reported as part of the Mineral Resource. A
range of criteria has been considered in determining this classification including:
•
•
•
Geological continuity
Data quality
Drill hole spacing
An Indicated Mineral Resource classification was based on drillhole spacing (250m x 100m, closing to
50m x 50m), acceptable underlying QAQC, and an RTK/DGPS survey of drillhole collars. An Inferred
Mineral Resource classification was based on a drill spacing of ~500m x 100m. Approximately 71% by
tonnage of the April 2025 MRE is classified as Indicated Mineral Resources and approximately 29% is
classified as Inferred Mineral Resources.
Three stages of metallurgical test work have been completed for the North Stanmore Project,
focusing on beneficiation, and leach test work to establish potential recoveries and processing
options.
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Core Resources (Core) located in Brisbane completed the third stage of test work including
beneficiation test work in March of 2024 and reported that the REE feed grade increased by 63% by
rejecting the +53µm feed material from across all samples. Core also completed leach test work on
the beneficiated material .
The leach test work program involved diagnostic metallurgical testing on a composite blend of the
beneficiated samples with a head grade of 1,283 ppm TREO. This was sourced from 23 samples and
13 drillholes from North Stanmore. The initial atmospheric leach test work program was trialled at
elevated temperatures and variable leaching conditions compared to previous work. These test
conditions yielded high recoveries of Pr (94%), Nd (94%) and heavy rare earth elements Tb (91%), and
Dy (92%) with a combined recovery of 93% Magnet Rare Earth Elements (“MREE”).
Scandium oxide (Sc2O3) recoveries of 50% had previously been achieved, with optimisation work
occurring in parallel. These assays were conducted by Australian Laboratory Services, Brisbane. The
objective of the diagnostic test work was to recover REE and Scandium oxide from the beneficiated
sample using alternative conditions to previous metallurgical programs, that successfully
demonstrated increased extractions at higher temperature (from 25°C to 100°C).
The April 2025 MRE includes a Mineral Resource estimate for Gallium oxide (Ga2O3) occurring within
the TREO + Sc2O3 mineralisation envelope, as Gallium oxide would be a byproduct of the REE recovery.
The Gallium oxide estimate used the January 2025 dataset and interpretation and is reported as part
of the April 2025 MRE. The grade distribution for Ga2O3 (ppm) associated with the TREO
mineralisation is shown in Figure 5. The crustal abundance of Gallium is similar to lead (15ppm) but
is weakly dispersed and rarely found in concentrations >1,000ppm (Henderson, 1982). For the North
Stanmore deposit the Gallium oxide (Ga2O3) mineralisation has an enrichment factor of 1.25
compared to the average crustal concentration and proven metallurgical recoveries in the MREC. 4
MEC deems that there are reasonable prospects for eventual economic extraction using open pit
mining on the following basis:
•
•
•
The North Stanmore Mineral Resources occur close to surface and will be amenable to
opencut mining to commence production. Mineralisation that occurs at depth with
limited drilling support has been excluded from the stated Mineral Resource,
Metallurgical testwork has returned favourable process recovery results,
The North Stanmore project is located approximately 6km from Cue township and
~420km from Geraldton Port via the Great Northern Highway, being one of West
Australia’s major arterial road networks.
Table 1: North Stanmore April 2025 MRE (≥330ppm TREO + Sc2O3 cut-off grade)
MRE TONNES
(t)
TREO
(ppm)
HREO
(ppm)
LREO
(ppm)
HREO/TREO
(%)
Sc2O3
(ppm)
Ga2O3
(ppm)
176,500,000
477
181
296
38
26
26
INFERRED
70,900,000
533
164
369
31
28
26
TOTAL
247,500,000
493
176
317
36
Numbers are rounded to reflect they are an estimate.
Numbers may not sum due to rounding.
27
26
CLASSIFICATION
INDICATED
4
Refer VTM ASX release dated 26 March 2025: Gallium Produced in Final MREC Product
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The sensitivity of the Mineral Resource estimate to the reporting cut-off grade is shown in Figure 3.
Figure 3: Grade tonnage curve for the North Stanmore TREO + Sc2O3 MRE (Indicated and Inferred)
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Table 2 shows the HREO within the HGMIN domain by classification, and Table 3 shows the HREO within the MIN domain by classification.
Table 2: North Stanmore April 2025 MRE HREO within the HGMIN domain (≥330ppm TREO + Sc2O3 cut-off grade)
CLASSIFICATION
MRE TONNES
(t)
INDICATED
35,400,000
INFERRED
16,500,000
TOTAL
51,900,000
TREO + Sc2O3
(ppm)
TREO
(ppm)
HREO
(ppm)
Eu2O3
(ppm)
Gd2O3
(ppm)
Tb4O7
(ppm)
Dy2O3
(ppm)
Ho2O3
(ppm)
Er2O3
(ppm)
Tm2O3
(ppm)
Yb2O3
(ppm)
Lu2O3
(ppm)
Y2O3
(ppm)
972
941
318
7.5
30.5
5.0
30.9
6.4
19.1
2.7
17.7
2.6
196
1,099
1,072
354
8.6
33.7
5.5
33.6
7.0
20.8
3.0
18.8
2.7
220
1,012
982
329
7.9
31.5
5.1
31.7
6.6
19.7
Numbers are rounded to reflect they are an estimate. Numbers may not sum due to rounding.
2.8
18.1
2.7
203
Table 3: North Stanmore April 2025 MRE HRE[Y]O within the MIN domain (≥330ppm TREO + Sc2O3 cut-off grade)
CLASSIFICATION
MRE TONNES
(t)
TREO + Sc2O3
(ppm)
TREO
(ppm)
HREO
(ppm)
Eu2O3
(ppm)
Gd2O3
(ppm)
Tb4O7
(ppm)
Dy2O3
(ppm)
Ho2O3
(ppm)
Er2O3
(ppm)
Tm2O3
(ppm)
Yb2O3
(ppm)
Lu2O3
(ppm)
Y2O3
(ppm)
INDICATED
141,200,000
386
361
146
2.4
12.0
2.1
13.6
3.0
9.2
1.4
9.2
1.4
92
INFERRED
54,500,000
399
370
106
2.6
10.4
1.7
10.1
2.1
6.2
0.9
5.8
0.9
65
TOTAL
195,700,000
390
364
135
2.5
11.5
2.0
12.6
2.7
8.4
Numbers are rounded to reflect they are an estimate. Numbers may not sum due to rounding.
1.2
8.3
1.2
85
The economic cut-off grade for the April 2025 MEC MRE (Table 1) was ≥330ppm TREO + Sc2O3. This cut-off grade was selected based on the evaluation
of other like regolith hosted rare earth Mineral Resources.
The MIN domain grade and tonnage is exclusive of the HG grade and tonnage (Table 3).
Table 4 shows the LREO by domain and classification above 330ppm TREO + Sc2O3.
Table 5 shows base metals, gallium, and hafnium grades above 330ppm TREO + Sc2O3.
Table 4: North Stanmore April 2025 MRE LREO Grades by Domain and Classification (≥330ppm TREO + Sc2O3 cut-off grade)
INDICATED
TONNES
(t)
35,400,000
TREO+Sc2O3
(ppm)
972
LREO
(ppm)
623
La2O3
(ppm)
144.8
CeO2
(ppm)
270.2
Pr6O11
(ppm)
36.0
Nd2O3
(ppm)
141.0
Sm2O3
(ppm)
30.5
HGMIN
INFERRED
16,500,000
1,099
718
182.8
293.8
43.0
163.9
34.1
HGMIN
TOTAL
51,900,000
1,012
653
156.9
277.7
38.3
148.3
31.6
MIN
INDICATED
141,200,000
386
215
48.7
96.0
11.9
47.2
11.0
MIN
INFERRED
54,500,000
399
264
63.9
121.2
14.4
53.8
10.9
MIN
TOTAL
195,700,000
390
229
52.9
103.1
12.6
49.1
10.9
Total
TOTAL
247,500,000
520
317
74.7
139.6
18.0
69.8
15.3
DOMAIN
CLASSIFICATION
HGMIN
Numbers are rounded to reflect they are an estimate.
Numbers may not sum due to rounding.
Table 5: North Stanmore April 2025 MRE Ni, Co, Cu, Hf, Ga2O3 (≥330ppm TREO + Sc2O3 cut-off grade)
Tonnes
(t)
Ni
Co
Cu
Hf
Ga2O3
(ppm)
(ppm)
(ppm)
(ppm)
(ppm)
INDICATED
35,400,000
36
29
43
6
26
HGMIN
INFERRED
16,500,000
44
26
55
5
26
HGMIN
TOTAL
51,900,000
38
28
47
6
26
MIN
INDICATED
141,200,000
23
14
25
7
26
MIN
INFERRED
54,500,000
45
21
47
5
25
MIN
TOTAL
195,700,000
29
16
31
6
26
Total
TOTAL
247,500,000
31
19
34
6
26
DOMAIN
CLASSIFICATION
HGMIN
Numbers are rounded to reflect they are an estimate.
Numbers may not sum due to rounding.
MRE Proportions Pie Charts
Figure 4: North Stanmore April 2025 updated MRE composition by percentage in 52.8Mt and 195.7Mt resource domains
The high HREYO/TREYO ratios shown in Figure indicates that the North Stanmore Mineral Resource
contains a significant percentage of the rare, and valuable, HREE’s Dysprosium (Dy) and Terbium (Tb).
Figure 5: MRE Gallium oxide grade distribution at North Stanmore
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Regional Geology
Victory’s tenements lie north of Cue, within the centre of the Murchison Province, which comprises
the Archaean gneiss-granitoid-greenstone north-western Yilgarn Block. The Archean greenstone belts
in the Murchison Province, the Warda Warra and Dalgaranga greenstone belts, and the southern
parts of the Meekatharra-Mount Magnet and Weld Range belts are dominated by metamorphosed
supracrustal mafic volcanic rocks, as well as sedimentary and intrusive rocks. Thermo-tectonism
resulted in development of large-scale fold structures that were subsequently disrupted by late-stage
faults. The greenstone belts are intruded by two suites of granitoids. The first, most voluminous suite,
comprises granitoids that are recrystallised with foliated margins and massive cores, typically
containing large enclaves of gneiss. The second suite consists of relatively small, post tectonic
intrusions. Two large Archaean gabbroic intrusions occur south of Cue. These are the DalgarangaMount Farmer gabbroid complex in the southwest, and the layered Windimurra gabbroic complex in
the southeast.
Project Geology
Victory’s REE, Sc and Ga discovery occurs in regolith above the North Stanmore alkaline intrusion,
discovered north of Cue. Despite its magnetic signature, the North Stanmore intrusion had not been
recognised previously on regional geological maps. Petrological data5 for samples of diamond core
indicate that the intrusion is post-tectonic and hence post-Archean in age.
The North Stanmore Intrusion is a large (approximately 16 km by 5 km) differentiated ultramafic to
felsic intrusion. Lithologies identified in thin section include kaersutite and carbonate-bearing
peridotite, orthopyroxenite, clinopyroxenite, leuco- and leuco-gabbro, ijolite, diorite, monzonite and
syenite. Some regolith samples are strongly LREE enriched indicating that the intrusion also contains
carbonatite. However, the uniformly high HREO/TREO of the regolith (of approximately 34% to 38%)
indicates that carbonatite represents a subordinate phase in the intrusion.
The North Stanmore Intrusion is interpreted to be associated with an early Proterozoic plume track
that was responsible for alkaline magmatism extending in a broad belt from Mt Weld carbonatite
near Laverton through Leonora to Cue6.
Deposit Type
The rare earth element mineralisation occurs in a relatively flat-laying saprolite-rich clay horizon
beneath a veneer of unconsolidated colluvium that ranges in thickness from 0m to 36m. The
uniformity of Nb/Ta ratios (Nb/Ta 16±4) in the regolith above the North Stanmore Intrusion indicates
that the regolith developed in situ. Importantly, studies have shown that Nb/Ta ratio of regolith over
carbonatites and other alkaline intrusions closely resembles the Nb/Ta ratio of their source plume
generated lithologies7.
Mineralised REE saprolite horizons above the North Stanmore Intrusion occur at depths between 12m
and 77m. Ce/Ce* tracks regolith oxidation, and the upper parts of regolith enrichment zones have
Ce/Ce* >1 reflecting gain of mobile Ce4+, while the lower parts of enrichment zones have Ce/Ce* <1.
Leachable clay REE deposits all have Ce/Ce* <1. The Ce/Ce* of the June 2024 updated MRE in the
Indicated category is 0.86 (Tables 1 to 4).
5 Refer VTM ASX release dated 10 August 2022, Major Alkaline Igneous Complex Discovered
6 Fiorentini et al., (2020) Nature Sci. Repts. 10:19729
7
Cornelius et al, (2005) Geochemistry: Exploration, Environment, Analysis, Vol. 5, 291–310; Zhukova et al., (2021) Ore Geology Reviews 139, 104539
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REEs are complexed with carbonate ions [CO32-] and bicarbonate ions [HCO3-] or occur as REE3+ ions
in soil as groundwater migrates downwards during tropical weathering. Based on Ce/Ce*systematics8
and TREO concentrations, there appear to be four zones of REE enrichment at North Stanmore. These
are 15m to 25m, 28m to 37m, 41m to 46m and a deeper zone between 53m and 77m. The regolith is
complex and importantly some cores exhibit two zones of REE enrichment.
REEs are adsorbed onto kaolinite or form secondary REE phosphates, rhabdophane (after monazite),
churchite (after xenotime), and florencite. QEMSCAN mineralogical studies show that the REEs are
mainly hosted by <20-µm particles.
Scandium is enriched throughout the regolith profile due to the breakdown of pyroxene in the North
Stanmore source lithologies. Sc is generally considered to behave differently to the REEs, which are
adsorbed as outer-sphere complexes on clay surfaces, found in Al(OH)2SiO sites, or occur as hydrated
REE bearing phosphates. However, Sc3+ behaves like the transition metals (Ni2+ , Co2+, Cu2+) and, due
to its smaller ionic radius, it adsorbs onto vacancy sites in clay lattices or attaches to the surface of
Mn oxides9. Sc is enriched throughout the regolith profile.
REO and Gallium Terminology
Yttrium is included as a REE because of its similar ionic radius to the lanthanides and has similar
chemical properties to the HREEs [holmium (Ho) and erbium (Er)].
Scandium, a highly valuable critical element occurs in the same Group of the Periodic Table (Gp. 3) as
the lanthanides. It occurs predominantly in HREE bearing ultramafic and mafic igneous like the North
Stanmore Intrusion. By contrast, felsic alkaline rocks and granitoids are more LREE enriched and
contain negligible amounts of Sc contents. The chemical properties of Sc are distinct from the other
REEs, and Sc has recently been recognised to have superconducting properties. Sc has been deemed
a critical mineral due to current Chinese and Russian control of the supply chain.
Gallium is a chemical element with the symbol Ga and atomic number 31. It is a soft, silvery metal
that is solid at room temperature but melts just above it, making it unique among metals. Gallium is
primarily used in the production of semiconductors, particularly in devices like light-emitting diodes
(LEDs) and solar panels. It forms important compounds such as gallium arsenide (GaAs), which is
widely used in electronics due to its excellent semiconductor properties. Additionally, gallium is
known for its ability to form binary compounds with elements like phosphorus and arsenic, which are
crucial in various technological applications.
Analytical data was determined by ALS using the ME-MS81 technique of fusion digestion followed by
ICPMS analysis. Results were returned in elemental form and were converted to oxides.
TREO (Total Rare Earth Oxides), LREO (Light Rare Earth Oxides), HREO (Heavy Rare Earth Oxides),
MREO (Magnet Rare Earth Oxides), and the ratio of HREO/TREO were calculated as follows:
•
TREO is the sum of La2O3, CeO2, Pr6O11, Nd2O3, Sm2O3, Eu2O3, Gd2O3, Tb4O7, Dy2O3, Ho2O3,
Er2O3, Tm2O3, Yb2O3, Lu2O3, and Y2O3,. This follows the protocol recommended by the
International Union of Pure and Applied Chemistry.10 Yttrium and Scandium are included as
8 Ce/Ce* = (2*(Ce )/(La +Pr )), where Ce , La and Pr are chondrite normalised values; La = La concentration /0.237,
N
N
N
N
N
N
N
CeN =Ce concentration /0.613 and PrN =Pr concentration/0.0928; Ce/Ce* ratios >1 reflect the gain of Ce4+ at shallower regolith depths while Ce/Ce*
ratios <1 reflect the loss of mobile Ce4+ from deeper parts of weathering profiles that contain Ce3+.
9 Zhang et al., (2024) Am. Mineralogist
8 Williams Jones and Vasyukova (2018) Economic Geology
ACN: 124 279 750 E: info@victorymetalsaustralia.com D: +61 (08) 6555 2950 A: Suite 1, 295 Rokeby Road, Subiaco, WA, 6008
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they share Group IIIA properties in the Periodic Table with the lanthanides. Importantly,
yttrium exhibits similar geochemical properties to the HREOs.
•
TREOS is the sum of La2O3, CeO2, Pr6O11, Nd2O3, Sm2O3, Eu2O3, Gd2O3, Tb4O7,Dy2O3, Ho2O3,
Er2O3, Tm2O3, Yb2O3, Lu2O3, Y2O3, and Sc2O3.
•
HREO is the sum of Eu2O3, Gd2O3, Tb4O7,Dy2O3, Ho2O3, Er2O3, Tm2O3, Yb2O3, Lu2O3, and Y2O3.
•
LREO is the sum of La2O3, CeO2, Pr6O11, Nd2O3, and Sm2O3.
•
MREO (Magnet Rare Earth Oxides) are the rare earths used in the production of magnets
predominantly, Nd2O3, Pr6O11 (NdPr) and Dy2O3, Tb4O7 (DyTb).
•
HREO/TREOS is the ratio of the sum of Eu2O3, Gd2O3, Tb4O7,Dy2O3, Ho2O3, Er2O3, Tm2O3, Yb2O3,
Lu2O3, and Y2O3/sum of La2O3, CeO2, Pr6O11, Nd2O3, Sm2O3, Eu2O3, Gd2O3, Tb4O7,Dy2O3, Ho2O3,
Er2O3, Tm2O3, Yb2O3, Lu2O3, Y2O3, and Sc2O3.
•
The quality of the assays is shown in Figure 6 by the smooth inter-element profiles in chondrite
normalised plots for the 197.2 Mt and 53 Mt resource compositions.
Sampling and sub-sampling techniques
Air-core drilling samples were collected as 1m samples from the rig cyclone. Each sample was placed
into large green drill bags (900mmx600mm) for temporary storage onsite. Each sample was then split
using a 3-tier (87.5% - 12.5%) splitter and the sample split was placed into calico sample bags for
transport to Perth.
Sample weights and recoveries were recorded on site and weighed 1.5 - 2.5kg depending on the
sample recovery from the drill hole. The mean bulk sample weight was 8.45kg.
A handheld pXRF anal
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