Mineral Resource Estimate Doubles at Splinter Rock
Released
Released
Announcement PDF
ASX Announcement
29 May 2024
ASX: OD6
Mineral Resource Estimate Doubles
at Splinter Rock Rare Earth Project
Total Resource of 682Mt @ 1,338ppm TREO at a 1,000ppm cut off,
including an
Indicated Resource of 119Mt @ 1,632ppm TREO at Inside Centre
OD6 Metals Limited (OD6 or the Company) is delighted to announce a Mineral
Resource Estimate (MRE) update for its Splinter Rock Rare Earth Project (the
Project), located northeast of Esperance, Western Australia.
Highlights:
•
Total Mineral Resource Estimate (MRE) doubles in size to 682Mt @ 1,338ppm TREO at 1,000ppm
cut-off grade (Indicated + Inferred) including:
•
High Grade Indicated MRE at Inside Centre of 119Mt @ 1,632ppm TREO at 1,000ppm cut-off grade
•
High value Magnet Rare Earth Oxides (MagREO) represents an average of ~23% of TREO grade
•
Approximately 910 kilo-tonnes of contained TREO and 205 kilo-tonnes of contained MagREO
•
The MRE has doubled the previously announced Mineral Resource estimate1
•
Substantial areas of identified clay basins with potential to further expand the MRE through future
exploration drilling
•
The Indicated Resource in addition to ongoing metallurgical works at ANSTO will enable completion of
a Scoping Study, due at the end of CY 2024
Brett Hazelden, Managing Director, commented:
“This Mineral Resource Estimate sets OD6 apart from any other clay hosted rare earth project in Australia, and highlights
Splinter Rock to be one of the largest and highest-grade projects globally. The MRE has significant further upside based
on the identified clay basins that remain open in multiple directions or have yet to be drill tested.
It is worth pointing out that if a lower cut of grade of 600ppm was utilised, the tonnage grade curve shows a mineralised
tonnage of 1.6 billion tonnes at 1,014 ppm TREO. This is a truly massive resource that puts Western Australia and Australia
on the worldwide REE map.
The Inside Centre Prospect, with an Indicated Resource of 119Mt at an average grade 1,632ppm TREO, will be the main
focus of the planned Scoping Study due for completion at the end of this calendar year. The metallurgical recoveries of
~60%, along with an anticipated low stripping ratio, plus low acid consumptions, no private royalties, access to greenenergy generation potential, proximity to port and strategic location away from farm land, sets the project apart from so
many of clay hosted deposits around the world.”
1
Refer ASX Announcement 18/7/23.
1
Project information provided under ASX Listing Rule 5.8.1
Mineral Resource Estimate Summary
The Splinter Rock project comprises 2,579 km2 of granted Exploration Licences located approximately 150 km
northeast of Esperance, Western Australia. The Project is located on Unallocated Crown Land and the Company
has a strong working relationship and agreements with the traditional owners via the Ngadju and the Esperance
Tjaltjraak Native Title Aboriginal Corporations.
The Splinter Rock clay-hosted REE mineralisation is currently thought to be a mobilised weathering product of
the REE enriched Booanya granite suite, which underlies the Project area. Historic work and examination of
target geology indicates that the target area at Splinter Rock is over 400km2.
OD6 has identified four main prospect areas from drilling and geophysics that contribute to the Mineral
Resource estimate:
•
Centre: Large clay basin within an elevated tableland. Clays have potentially pooled in this area from
Booanya granite to the north. Sub-prospects include Inside Centre and Centre Northwest
•
Scrum: Magnetic dipole, with the northern area, located over a magnetic high in Booanya granite grading
to a magnetic low in the south.
•
Prop: Located at the lowest elevation and is surrounded by Booanya to the north and south and
interpreted to be a glacial paleo-valley filled with clay.
•
Flanker: Sits on top of a magnetic high on the Booanya granite and most likely to comprise some
transported clays but is potentially related to a localised weathered granite profile.
The Mineral Resource is expressed as Total Rare Earth Oxide (TREO), represented by:
TREO (Total Rare Earth Oxide) = La2O3 + CeO2 + Pr6O11 + Nd2O3 + Sm2O3 + Eu2O3 + Gd2O3 + Tb4O7 + Dy2O3
+ Ho2O3 + Er2O3 + Tm2O3 + Yb2O3 + Lu2O3 + Y2O3
MagREO (Magnetic Rare Earth Oxide) = Pr6O11 + Nd2O3 + Tb4O7 + Dy2O3
HREO (Heavy Rare Earth Oxide) = Gd2O3 + Tb4O7 + Dy2O3 + Ho2O3 + Er2O3 + Tm2O3 + Yb2O3 + Lu2O3
The key magnet rare earth elements Neodymium (Nd), Praseodymium (Pr), Terbium (Tb) and Dysprosium (Dy)
comprise the highest price and demand, driving the future economics of the Project. The Mineral Resource is
presented as elemental oxides (as opposed to elements) in accordance with current industry practice.
Table 1: Splinter Rock Rare Earth project Mineral Resource Estimate - by Prospect at 1,000ppm TREO cut off grade
Prospect
Category
Tonnes
(Mt)
TREO
(ppm)
Pr6O11
(ppm)
Nd2O3
(ppm)
Tb4O7
(ppm)
Dy2O3
(ppm)
MREO
(ppm)
MREO/TREO
(%)
Inside Centre
Indicated
119
1,632
79
271
2
12
366
22.4%
Centre
Inferred
276
1,342
65
228
3
15
310
23.1%
Centre NW
Inferred
21
1,255
65
227
3
14
309
24.6%
Scrum
Inferred
126
1,228
58
210
3
15
285
23.2%
Prop
Inferred
94
1,160
53
190
2
13
259
22.3%
Flanker
Inferred
45
1,250
59
212
3
16
290
23.2%
Total
Indicated
& Inferred
682
1,338
64
226
3
14
307
22.9%
2
The Mineral Resource estimate for Splinter Rock has been reported at a 1,000 ppm TREO cut-off grade. The cutoff grade was chosen on the basis of a preliminary review of the parameters that would likely determine the
economic viability of an open pit operation and with comparison with other clay hosted REE deposits. The
geological model and search parameters are based both on drilling and the modelling of the electromagnetic
data by the CSIRO. The electromagnetic modelling, calibrated by drill data, has proven very reliable at predicting
clay basin thicknesses (refer below and ASX announcement: 15 November 2023).
The Mineral Resource was estimated cumulatively for consecutive grade groups which allows for the results to
be reported cumulatively for different cut-off grades and presented for comparison purposes (refer Table 2 and
Figure 1).
Table 2: Splinter Rock Rare Earth project Mineral Resource Estimate - by global cut off grade
Cut-off
ppm TREO
Tonnes
(Mt)
TREO
(ppm)
Pr6O11
(ppm)
Nd2O3
(ppm)
Tb4O7
(ppm)
Dy2O3
(ppm)
MREO
(ppm)
MREO/TREO
(%)
400
2,226
884
42.0
147.0
1.8
9.9
201
22.7%
600
1,654
1014
48.4
170.1
2.1
11.3
232
22.9%
800
1,125
1164
55.8
196.1
2.3
12.7
267
22.9%
1,000
682
1338
64.4
225.8
2.6
14.2
307
22.9%
1,200
394
1518
73.3
256.1
2.8
15.5
348
22.9%
1,400
226
1686
81.8
285.0
3.1
16.5
386
22.9%
Figure 1: Splinter Rock Rare Earth project tonnage and grade curve
3
The Competent Person for this MRE is Mr Jeremy Peters, FAusIMM CP (Min, Geo), a full-time employee of Burnt
Shirt Pty Ltd. Mr Peters has sufficient relevant experience in the reporting of Mineral Resources to act as
Competent Person as defined by the JORC Code (2012 Edition), and consents to his nomination as such in this
Report.
Burnt Shirt reports that at Splinter Rock:
•
Mineralisation is derived from weathering of granite of the Booanya suite and comprises clays and
transported materials.
•
TREO grades are comparable to (or greater than) those being commercially exploited elsewhere in the
world.
•
Preliminary metallurgy indicates that the REE’s are amenable to acid leach clay processing techniques.
•
Burnt Shirt endorses an Inferred Mineral Resource estimate for Splinter Rock of 682 million tonnes grading
1,338 ppm TREO. Splinter Rock mineralisation is open towards the northeast and southwest of the central
drill traverse at each prospect.
Burnt Shirt recommends that OD6:
•
Continue infill drilling to upgrade the MRE to Indicated and Measured classification;
•
Continue metallurgical studies to design an appropriate flow sheet to support classification of Measured
Mineral Resources;
•
Concentrate further immediate geological work on the Inside Centre high-grade prospect;
•
Continue ongoing metallurgical work at ANSTO; and
•
Undertake a Scoping Study underpinned by the current Indicated Mineral Resource Estimate to identify a
production target, capital cost, operating cost and financial modelling, to support ongoing expenditure
and progress.
4
Location and Access
Splinter Rock encompasses 2,579km2 of Exploration Licences under Western Australian legislation 2 located
approximately 150km northeast of Esperance. It comprises six granted Exploration Licences, E63/2115, E69/3904,
E69/3905, E69/3907, E69/3893 and E69/3894 (Figure 2).
Access from Esperance is via Fisheries Road (sealed road) to Condingup and then by the Parmango Road which
is sealed for approximately 40km before changing to a well-maintained gravel road which passes through the
Project. Extensive grid lines and historically cleared tracks also provide secondary access to the Project.
Figure 2: Splinter Rock Tenement and Prospect Area Location (source: OD6 on open-source aerial imagery)
Geology and Geological Interpretation
The Splinter Rock project is underlain by the Proterozoic, northeast trending East Nornalup Zone of the AlbanyFraser Orogen. The Booanya Suite Granites are classified as being ‘A’ type (anorogenic) leucogranites and are
described as being heavily enriched in REE.
The Booanya Suite is part of the 1330-1360Ma Esperance Supersuite granitoids and are generally enriched in
K2O, TiO2 and P2O5 compared with neighbouring granites. Strong REE enrichment distinguishes the Booanya
Suite from other granite groups of the Albany–Fraser Orogen (Figure 3).3
2
For an explanation of Western Australian Mining legislation, refer to www.dmp.wa.gov.au
Refer Smithies, RH, CV Spaggiari, & CL Kirkland. Building the crust of the Albany-Fraser Orogen: constraints from granite geochemistry.
(2015), Geological Survey of Western Australia Report 150. And https://asud.ga.gov.au/search-stratigraphic-units/results/79197
3
5
Following the Early Permian glacial period (250Ma), uplift along the craton margin resulted in a deep weathering
and drainage profile and subsequently the development of Tertiary basins (<65Ma). Acidic ground water and
topographic differences may have mobilized REEs into the groundwater and into the clays.4
Splinter Rock lies on the Ravensthorpe Ramp, a topographic elevation change that may have influenced the
movement of this acidic groundwater. At Splinter Rock, the lateritic profile is punctuated by steep-sided,
elevated granite domes. Between these domes the saprolite is well developed, the REE-bearing clays forming in
the saprolite profile in the valleys between the domes.
The whole sequence is covered by a layer of Quaternary aeolian sand plain, thin soil profile and, in places,
Tertiary sedimentary basins, in topographic lows of between 6 m and 60 m thickness.
Clay of between 7 m to >100 m thickness is developed below this cover.
Figure 3: Splinter Rock geology, MRE area, prospects and drill locations. (source: OD6 on GSWA mapping)
Beard, JS., Evolution of the river systems of the south-west drainage division, Western Australia. (1999), Journal of the Royal Society of
Western Australia)
4
6
Prospect Summary
Centre Prospect
The Centre Prospect target area has been defined from OD6’s digital elevation model (DEM), recent mid-time
AEM preliminary imagery and CSIRO modelled AEM combined with the results of existing drilling. Drilling
indicates that REEs occur in thick clays of the prospect that vary between 10 m to 70m with TREO assay
intercepts up to 2,200ppm (Figures 4 to 8). Inside Centre is a high-grade deep clay channel at the southern end
of the resource and is approximately 2km long by 1km wide. Centre North-West is a narrow channel to the
north west of the main Centre basin, that also exhibits properties similar to Inside Centre. The Centre Prospect is
overlain by a shallow transported cover and leached clays of approximately 5 m to 15 m thickness above the
rare earth clay host. The target area covers 136km2 and extends approximately 27km along its axis and between
5km and 10km wide. Initial Metallurgical acid leach tests achieved 42% to 90% recovery of MagREE (average
60%).
Figure 4: Centre Prospect Cross Section A to A’ (refer Figure 18 for cross-section location). Vertical exaggeration x 5.
(Source: OD6)
7
Figure 5: Centre Prospect Cross Section B to B’ (refer Figure 18 for cross-section location). Vertical exaggeration x 5.
(Source: OD6)
Figure 6: Inside Centre Prospect Cross Section C to C’ (refer Figure 18 for location). Vertical exaggeration x 5. (Source:
OD6)
8
Figure 7: Centre Prospect Cross Section D to D’ (refer Figure 18 for cross-section location). Vertical exaggeration x 5.
(Source: OD6)
Figure 8: Centre Prospect Cross Section E to E’(refer Figure 18 for cross-section location). (vertical exaggeration x5)
(Source: OD6)
9
Scrum Prospect
Scrum is defined in a similar manner to Centre and the REE-bearing clays clay areas that vary between 10m to
50m with TREO assay intercepts up to 2,180ppm (Figures 9 & 10). The prospect is partly covered by a sand with
thickness varying between approximately 15m to 35m above the clay hosted rare earth areas. Target area covers
26km2 and extend along an approximately 11km axis between 1km and 5km wide. Initial Metallurgical acid leach
tests achieved 40% to 89% recovery of MagREE (average 65%)
Figure 9: Scrum Prospect Cross Section F to F’ (refer Figure 19 for cross-section location). Vertical exaggeration x 5.
(Source: OD6)
Figure 10: Scrum Prospect Cross Section G to G’ (refer Figure 19 for cross-section location). Vertical exaggeration x 5.
10
Prop Prospect
Prop has been defined in a similar manner to Centre with REEs occurring in thick clay areas that vary between 10
m to 80m with TREO assay intercepts up to 2,450ppm (Figures 11 to 14). Variable transported cover and upper
saprolitic clays occur to approximately 3m to 24m thickness above the rare earth clay hosts. The target area
covers 58km2 and extends approximate 11km along axis and up to 9km wide. Late-time AEM preliminary
imagery has been used to define the target, which contains some of the thickest accumulations of clay identified
to date. Initial Metallurgical acid leach tests achieved 40% to 96% recovery of MagREE (average 70%).
Figure 11: Prop Prospect Cross Section H to H’ (refer Figure 20 for cross-section location). Vertical exaggeration x 5.
(Source: OD6)
Figure 12: Prop Prospect Cross Section I to I’ (refer Figure 18 for cross-section location). (vertical exaggeration x5)
(Source: OD6)
11
Figure 13: Prop Prospect Cross Section J to J’ (refer Figure 20 for cross-section location). Vertical exaggeration x 5.
(Source: OD6)
Figure 14: Prop Prospect Cross Section K to K’ (refer Figure 20 for cross-section location). Vertical exaggeration x 5.
(Source: OD6)
12
Flanker Prospect
Flanker has been defined in a similar manner to Centre, with REEs occurring in thick clays that vary between 10m
to 30m and TREO assay intercepts of up to 2,050ppm (Figure 15). This is covered by shallow transported cover
and saprolitic clays of 3 m to 15m thickness above the REE host clay. The target covers 42km2 and extends
approximately 17 km along axis, varying between 3 km and 5 km wide. This prospect is shallow, with clay hosted
REE to within 3m of surface with preliminary early-time AEM imagery used to define it. This data exhibits
influence from near-surface conductive salts. Initial Metallurgical acid leach tests achieved 41% to 76% recovery
of MagREE (average 55%).
Figure 15: Flanker Prospect Cross Section L to L’ (refer Figure 17 for cross-section location). Vertical exaggeration x 5.
(Source: OD6)
13
Geophysics
A Tempest®5 AEM survey was completed over Splinter Rock during October and November 2022. This survey
aimed to identify and map clay location, expanse, depth and thickness across OD6’s tenements utilising
discovery and processing techniques evaluated in conjunction with the Commonwealth Industrial and Scientific
Research Organisation (CSIRO).6
The program comprised 11,500 line km flown over both the Splinter Rock and Grass Patch project areas. This
was flown at between 400m and 800m line-spacing in a north-west to south-east direction at Splinter Rock.
Data was analysed by the CSIRO and used to map sub-surface electrical conductivity of rocks and soils. It is
understood that higher electrical conductivity indicates rock layers that are clay rich, hold salt water or contain
sulphide mineralisation. Low electrical conductivity indicates zones of non-conductive rock (e.g. granite), sand or
fresh water.
This technique was used to map inferred conductive clay horizons. Preliminary results enabled targeting of high
priority exploration areas. Early, mid and late time conductivity images from the models strongly align with clay
horizons identified in OD6’s drill results and the results of a historical wide spaced AEM geophysical survey,
reprocessed by OD6 (Figure 16). Subsequent modelling by the CSIRO, using machine learning methods
calibrated against drilling has enabled modelling target horizon thicknesses. The Splinter Rock project is
particularly amenable to this technique due to relatively low occurrence of salt lakes compared to other parts of
the Esperance REE province.
At the same time, specialist filtering of the terrain model (SRTM) data identified that short-wavelength
information represents small creeks and gullies and broad low-wavelength information represents basins. When
combined with the AEM data, this allows identification of basins where REE rich granites have weathered into
clays and transported the REE’s through groundwater and chemical weathering, to be deposited in as
accumulations in clay saprolite/sediment basins.
Drill testing of this AEM models has shown excellent reliability and correlation, commonly to within a few
metres. This data has facilitated modelling of the extent of the REE host clay for the purpose of resource
estimation.
5
For an explanation of the Tempest system, refer www.xcaliburmp.com
6
OD6 ASX releases, 5 October 2022 & 15 November 2023.
14
Figure 16: AEM Mid time electromagnetic conductivity model of Splinter Rock project with MRE Area and drilling
locations. Yellow, orange red areas interpreted to indicated thicker clay zones, with blue areas the granites. (Source:
OD6)
Drilling Techniques
Air core drilling was completed by hammer and blade drilling techniques using blade bits of 87mmØ with 3m
length drill rods to blade refusal. Burnt Shirt Pty Ltd observes that air core is the industry-standard drilling
technique for the drilling of unconsolidated or clay material. The samples were a mix of wet and dry samples,
influenced by local variations in the water table.
Drill hole collars were located using a handheld GPS to +/-5m accuracy using the MGA 94 Zone 51 grid system
and downhole survey was not undertaken, the holes being vertical. Topographic control is based on GPS and is
calibrated against the terrain model.
Sample recoveries from this drilling were not recorded but are not considered to be materially biased, given the
nature of the geology and samples. Holes are wide and irregularly spaced (typical of regional exploration
drilling) designed to test anomalies and OD6 has assessed the assay data against control samples and historical
assays, which has not returned any indication of bias.
No holes were twinned, however, results of historic drilling was verified (historic drilling not included in resource
estimate).
15
Sampling and Sub-sampling Techniques
Geochemical analysis utilised metre interval samples returned from the rig-mounted cyclone of a conventional
air core drilling rig. Two samples were composited over three metre intervals – the first (the A sample) being
submitted for laboratory analysis and the second (the B sample) being retained as a reference.
Certified reference samples, duplicates and blank samples were inserted into the sample stream such as to
represent approximately 5% of the samples submitted to the laboratory for analysis.
A sample from each metre was collected and stored in a chip tray for logging and other analyses including
mineralogical determination.
Sample Preparation and Analysis Method
“A Samples” were submitted for chemical analysis using industry standard sample preparation and analytical
techniques including:
•
Riffle split of all “A samples”, bagging one half as a coarse reject for storage.
•
Pulverise the balance of the material.
•
Generate a standard 300g for analysis.
•
Bag the balance as a bulk pulp master for storage.
Analysis included four acid digest on 0.25g sample analysed via induction coupled plasma analysis (ICP-MS and
ICP-AES).
For the REEs, multielement results were converted to stoichiometric oxide (REO) assays using element-tostoichiometric conversion factors (Table 3).
OD6 observes that rare earth oxide reporting is the industry accepted form for reporting rare earths. Burnt Shirt
agrees with this approach.
Table 3: Splinter Rock stoichiometric conversions
Element ppm
Conversion Factor
Oxide Form
Ce
1.1713
CeO2
Dy
1.1477
Dy2O3
Er
1.1435
Er2O3
Eu
1.1579
Eu2O3
Gd
1.1526
Gd2O3
Ho
1.1455
Ho2O3
La
1.1728
La2O3
Lu
1.1371
Lu2O3
Nd
1.1664
Nd2O3
Pr
1.1703
Pr6O11
Sm
1.1596
Sm2O3
Tb
1.1510
Tb4O7
Tm
1.1421
Tm2O3
Y
1.2699
Y2O3
Yb
1.1387
Yb2O3
16
Estimation Methodology
OD6’s block model interpolation procedure comprises:
•
validation of the digital data and data storage/security protocols;
•
generation of cross sections to be used for geological interpretations;
•
basic statistical analyses to assess cutoff grades and general data behaviour;
•
development of 3D wireframe models for each prospect area with sufficient continuity of
geology/mineralisation, using available geochemical assays for each drill hole sample interval; and
•
generation of block models for the Mineral Resource estimation and categorising the results according
to JORC definitions.
Modelled AEM data was used to expand the wireframes around the drill lines to a maximum of 400m from drill
holes. Wireframes were truncated where saline water and other lithological units were modelled. These
wireframes were generated for each prospect and compared to the sectional interpretations for control and
were found to be in approximate agreement (Figures 17 to 20).
The drillhole spacing along the strike of the mineralised zones is approximately 200-400m with section lines
perpendicular to the northeast-southwest strike of the mineralisation.
There is demonstrably a good geological and statistical continuity of mineralisation and there is sufficient
confidence to extend the interpretation up to 400 m distance along either side of the sections, and is guided on
thickness by the reliable AEM model to establish geological wireframes. This corresponds to approximately twice
the drill spacing along the sections.
For the current MRE, a dry bulk density of 1.5t/m3 was globally assigned.
The Splinter Rock block model was created using a block size of 1,000 m in the x-direction, 1,000 m in the ydirection and 6 m in the z-direction. Grades were interpolated into these primary blocks, with the model being
sub-blocked to dimensions of 10 m (x) x 10 m (y) x 1 m (z) to better model the mineralisation against
topography and wireframe boundaries. The entire model was rotated to 315° to allow its long axis to run
perpendicular to the geological sections.
Interpolation was made in a single pass, using Ordinary Kriging. A minimum of six samples and a maximum of
twelve samples were used for interpolation. Grades were interpolated for each element and TREO at each
prospect.
The interpolation was constrained within the wireframes generated from the drill sections and AEM
interpretation. This was further constrained to a swathe of within 400m of either side of the drill traverse. This
swathe was chosen to represent a reasonable grade and tonnage estimate based on physical evidence of
drilling, supported by geophysical interpretation. The 400m either side of the traverse represents a distance that
is supported by the variography performed on the samples.
The Competent Person considers this approach reasonably models the geometry and distribution of the
mineralisation.
17
Figure 17: Overall Mineral Resource shell on the basement model (from AEM data). Oblique view to the north. Cross
Section Figure 15 shown as L-L’ etc. Vertical Exaggeration x 5. (Source: OD6)
Figure 18: Centre Mineral Resource shell on the basement model (from AEM data). Oblique view to the north. Cross
Section Figure 4-8 shown as A-A’ etc. Vertical Exaggeration x 5. (Source: OD6)
18
Figure 19: Scrum Mineral Resource shell on the basement model (from AEM data). Oblique view to the north. Cross
Sections Figure 9-10 shown as F-F’ etc. Vertical Exaggeration x 5. (Source: OD6)
Figure 20: Prop Mineral Resource shell on the basement model (from AEM data). Oblique view to the north. Cross Section
Figure 11-14 shown as H-H’ etc. Vertical Exaggeration x 5. (Source: OD6)
19
Cutoff Grades, including basis for the selected Cutoff Grades
The Mineral Resource for Splinter Rock, as determined by the methodology described above, is reported at a
1,000 ppm TREO cut-off grade. The cut-off grade was chosen based on a preliminary review of the parameters
that would likely determine the economic viability of an open pit operation and with comparison with other clay
hosted REE deposits.
The Mineral Resource was estimated cumulatively for consecutive grade groups which allows for the results to
be reported cumulatively for different cut-off grades and presented for comparison purposes (refer Table 2
above and Figure 21 below).
Figure 21: Splinter Rock Rare Earth project Tonnage and Grade Curve
Criteria used for Classification
All the individual prospect Mineral Resources for Splinter Rock have been classified as Inferred and grades were
interpolated to a maximum of approximately 400 m beyond the central drill traverse at each prospect.
The Mineral Resource estimate was classified in accordance with the JORC Code, taking into account drillhole
spacing, data quality and attendant confidence, geological continuity (including in drill thickness and modelled
thickness from the AEM model), variogram ranges, search volume and grade interpolation.
The Competent Person is satisfied that the classification is appropriate.
20
Mining and Metallurgical methods / material modifying factors
No specific mining or metallurgical methods or parameters were incorporated into the modelling process.
It is noted however that three phases of metallurgical acid leach testing have been conducted on numerous
separate drill holes stratigraphic composites that have shown encouraging results with further works ongoing
at ANSTO (refer Figures 22 & 23).
Confidence in the estimate is insufficient to allow the meaningful application of technical and economic
parameters or to enable an economic evaluation that is reliable enough for public disclosure. Inferred Mineral
Resources must be excluded from estimates forming the basis of Feasibility or other economic studies.
Figure 22: Splinter Rock Scrum and Centre metallurgical sample drill hole locations on AEM model clay thickness
21
Figure 23: Splinter Rock Prop and Flanker metallurgical sample drill hole locations on AEM Model clay thickness
First Nations People Acknowledgment
OD6 Metals Limited (OD6) acknowledges the Esperance Nyungar and Ngadju Peoples of the land and waters
upon which our exploration is focused, and the Whadjuk People of the land upon which our offices are based.
We pay our respects to the Traditional Owners and their elders past, present and emerging.
22
Competent Persons Statement
Information in this report relating to Mineral Resource estimation is based on information reviewed by Mr
Jeremy Peters who is a Fellow of the Australasian Institute of Mining and Metallurgy and a Chartered
Professional Geologist and Mining Engineer of that organisation. Mr Peters is a Director of Burnt Shirt Pty Ltd,
consulting to OD6 and has sufficient experience which is relevant to the style of mineralisation and type of
deposit under consideration and to the activity which he is undertaking to qualify as a Competent Person as
defined by the 2012 Edition of the Australasian Code for reporting of Exploration Results, Mineral Resources and
Ore Reserves. Mr Peters consents to the inclusion of the data in the form and context in which it appears.
Forward Looking Statements
Certain information in this document refers to the intentions of OD6 Metals, however these are not intended to
be forecasts, forward looking statements, or statements about the future matters for the purposes of the
Corporations Act or any other applicable law. Statements regarding plans with respect to OD6 Metals projects
are forward looking statements and can generally be identified by the use of words such as ‘project’, ‘foresee’,
‘plan’, ‘expect’, ‘aim’, ‘intend’, ‘anticipate’, ‘believe’, ‘estimate’, ‘may’, ‘should’, ‘will’ or similar expressions. There
can be no assurance that the OD6 Metals plans for its projects will proceed as expected and there can be no
assurance of future events which are subject to risk, uncertainties and other actions that may cause OD6 Metals
actual results, performance, or achievements to differ from those referred to in this document. While the
information contained in this document has been prepared in good faith, there can be given no assurance or
guarantee that the occurrence of these events referred to in the document will occur as contemplated.
Accordingly, to the maximum extent permitted by law, OD6 Metals and any of its affiliates and their directors,
officers, employees, agents and advi
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