Metallurgical Diamond Drilling Completed at Splinter Rock
Released
Released
Announcement PDF
ASX Announcement
9 October 2025
ASX: OD6
TREO (Total Rare Earth Oxide) = La2O3 + CeO2 + Pr6O11 + Nd2O3 + Sm2O3 + Eu2O3 + Gd2O3 + Tb4O7 + Dy2O3 + Ho2O3 + Er2O3 + Tm2O3 + Yb2O3 + Lu2O3 + Y2O3.
Metallurgical Core Drilling Successfully Completed
Core samples to be sent to ANSTO for optimisation and offtake product development
OD6 Metals Limited (OD6 or the Company) is pleased to advise that metallurgical core
drilling has been completed at Splinter Rock Rare Earth Project, located in Western
Australia. Core samples will be sent to ANSTO as part of the planned optimisation and
scale-up program aimed at refining the heap leach and impurity removal flowsheet and
providing final product samples for offtake discussions.
Splinter Rock hosts a JORC Mineral Resource of 682Mt @ 1,338ppm TREO.
Highlights:
• MetallurgicalDiamondCoreProgramSuccessfullyCompleted:Drilling successfullycompleted
at the Inside Centre prospect, delivering high-quality core samples for metallurgical testing
• 2 to 2.5 tonne of Rare Earth Bearing Core Collected to support ongoing metallurgical
optimisation and feasibility studies.
• Advanced Testwork Program to Commence: Samples to be sent to ANSTO for heap leach,
impurity removal, and rare earth product optimisation testwork.
• Offtake Samples: MREC and MREH samples will be utilised for offtake discussions, to assess
commercial payability options for the products
• Inside Centre Resources Upside: Significant upside remains to increase the existing JORC
Indicated Resource of 119Mt @ 1,632ppm TREO with the mineralisation open to the NE & SW
• Strategic partnerships with ANSTO and CPC Engineering continue to guide the testwork
program and optimal development pathway
• Phase 2 drilling at Gulf Creek Copper Project to commence imminently to target large
geophysical anomalies which may represent repeats of the high grade historical mine
Managing Director Brett Hazelden, commented:
“Completion of the metallurgical diamond drilling program marks another important milestone for OD6. The bulk
core samples will enable ANSTO and our technical team to refine and scale-up our flowsheet, while producing
sufficient MREC product for customer evaluation. This is a critical step toward advancing Splinter Rock as one of
Australia’s leading emerging clay-hosted rare earth projects.
With this program complete we now turn our minds to the next drilling program at our Gulf Creek Copper Project
in NSW. Our drill and geological crews are scheduled be on site next week with more details to follow.
It’s a good time to be in both Rare Earths and Copper given the positive fundamentals. “
2
Metallurgical Drill Core Details
Six Metallurgical drill locations have ben completed (Table 1 and Figure 1) utilising PQ diamond core (85mm
core), which have been twinned next to existing AirCore drill hole locations previously utilised metallurgical
testwork conducted at ANSTO.
The diamond drilling program targeted key areas of the Inside Centre Deposit, designed to obtain
representative material for metallurgical and processing testwork. The bulk rare earth bearing material will
provide ~2.0 to 2.5 tonnes of core samples that were logged and prepared for dispatch to ANSTO in Sydney.
Table 1: Metallurgical core drill hole locations
Hole ID Twin Hole ID Type Easting Northing RL (m)
Dip
(degrees)
Depth(s)
SRDD005 SRAC0225 Aircore 501815 6336021 204.1 -90 33-86
SRDD006 SRAC0226 Aircore 501953 6335879 204.4 -90 21-81
SRDD004 SRAC0266 Aircore 501399 6336445 205.4 -90 21-58
SRDD003 SRAC0357 Aircore 502068 6336999 204.9 -90 39-90
SRDD002 SRAC0358 Aircore 502177 6336615 204.0 -90 36-84
SRDD001 SRAC0359 Aircore 501939 6336293 203.5 -90 27-87
Figure 1: The Inside Centre Indicated Resource (shown in red) and the selected holes twinned (shown in yellow). The figure
also shows the Existing Centre Inferred Resource (shown in orange) plus shows mineralisation remains open to the SW and
NE within the modelled clay basin airborne electromagnetic survey
3
ANSTO Testwork Program Overview
The metallurgical core program has targeted zones within Inside Centre that best represent an area of consistent
geology, prior metallurgical outcomes, low striping ratios, significant grades and planned early-stage mining
areas. Samples will be composited at ANSTO for a series of advance campaigns focused on:
• Heap leach Optimisation;
o Heap Leach duration and kinetics
o Acid strength and consumption
o Counter current heap configuration
o Particle agglomeration methodology
• Impurity Removal Verification:
o Nanofiltration (NF) acid recovery and liquor concentration tuning
o Ion Exchange (IX) selectivity and elution to reduce Fe/Al and trace U/Th prior to precipitation
o Impurity removal (IR) two stage pH optimisation to achieve target impurity specifications
• Bulk MREC and MREH Production
o Precipitation to produce >1 kg of MREC and/or MREH for customer qualification, offtake
discussions, and to assess commercial payability options for the products.
Pathway to Offtake
The core program directly supports OD6’s ongoing testwork and studies with ANSTO and CPC Engineering by
supplying bulk test material and enabling production of more than 1 kg of a premium, high grade and low
impurity Mixed Rare Earth Carbonate (MREC) and Mixed Rare Earth Hydroxide (MREH).
Offtake Samples of MREC and MREH can then be sent to global separation facilities that will be utilised for
offtake discussions and to assess commercial payability options for the products.
Engagement with potential offtake partners is continuing.
Why Inside Centre?
Inside Centre has delivered standout metallurgy and forms the Indicated component of the current resource
(119Mt @ 1,632ppm TREO), supporting near-term development studies. There remains significant upside to
increase the existing JORC with mineralisation open to the SW and NE within the modelled clay basins (Refer to
Figure 1 and ASX Announcement Mineral Resource Estimate Doubles)
Prior work shows heap leach recoveries of ~79% MagREE (Nd, Pr, Dy, Tb) at Inside Centre, with consistently high
Nd/Pr recoveries (~80%). The adoption of NF has demonstrated acid recovery of ~84.5%, materially lowering
acid consumption and shrinking downstream IR circuit size, which together are expected to improve project
economics.
4
Preferred Process Flowsheet Plus Metallurgical and Study Outcomes to Date
OD6, CPC and ANSTO have successfully demonstrated and recommended a multi-stage processing pathway
outlined in Figure 1, that efficiently produces a superior quality product with low impurities, that has achieved
high REE element total flowsheet recoveries.
The Preferred Process flowsheet has built on the metallurgical and optioneering study outcomes to date which
have been progressively reported to the ASX as per the following:
1. Heap Leaching – Simple, low-acid usage leaching of rare earth-bearing clays to generate enriched
leachate solution (refer ASX 16 October 2024)
2. Nanofiltration (NF) – Recycling of Acid, concentration of REEs and reduction of liquid volume
produced downstream (refer ASX 4 August 2025)
3. Ion Exchange (IX) – Concentration of rare earth elements and enhanced removal of iron (Fe) and
aluminium (Al) reducing downstream processing risk (refer ASX 7 August 2025)
4. Impurity Removal (IR) – Final removal of residual deleterious elements (e.g. Al, Ca, Fe, U, Th, P) to meet
high product quality and low impurity specifications.
5. Product Precipitation – Recovery of high-grade Mixed Rare Earth Carbonate (MREC) or Mixed Rare
Earth Hydroxide (MREH) from purified solution (refer ASX 13 August 2025)
6. Chlor-Alkali Facility (CAF) – Confirmed as a cost-reduction measure, producing key reagents onsite
and materially lowering operating costs (refer ASX 2 September 2025)
7. Low Cost Route – The Optioneering Study supports heap leaching as the lower cost and higher
recovery option when compared to conventional agitated tank leaching for the Splinter Rock Rare Earth
Project at the Inside Centre Deposit (refer ASX 11 September 2025)
8. Innovative Process Flow Sheet Selected - The Optioneering Study recommends preferred process
flowsheet moving forward (refer ASX 1 October 2025)
The final MREC/MREH products contain elevated concentrations of Nd, Pr, Dy and Tb, collectively representing
a high-value magnetic rare earth mix highly sought after in permanent magnet supply chains. Benchmark
payability for MREC and MREH typically ranges between 70–85% of REO basket value.
The Company aims to be a 6,000 plus tonnes per annum (tpa) producer of REO, in either the form of Mixed
Rare Earth Carbonate (MREC) or Mixed Rare Earth Hydroxide (MREH) in 5 years (refer ASX 11 September 2025)
5
Figure 1: Preferred Process Flowsheet from ANSTO Testwork and CPC Optioneering Study (refer ASX 1 -10-2025)
Next Steps
ANSTO Testwork Scale Up: Heap Leach and Impurity Removal testwork as described above
Optioneering Study: CPC Engineering (CPC) and ANSTO are continuing to review the testwork performed with
the aim to identify a preferred flowsheet based on cost, recovery, scalability, and product quality.
Engagement with potential offtake partners: To assess commercial payability options for MREC and MREH
products.
Engagement with government and potential financing partners: OD6 has and continues to engage
government and potential financing organisations. This is anticipated to be a continuous process over the
development cycle.
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Competent Persons Statement
The scientific and technical information that relates to process metallurgy is based on information reviewed by Mr Brett Haze lden
(Managing Director and CEO) of OD6 Metals Limited. Mr Hazelden is a Member of the AusIMM and has sufficient experience
relevant to hydrometallurgical processes to qualify as a Competent Person as defined by the JORC Code. Mr Hazelden owns shares
in the Company and participates in the Company’s employee securities incentive plan. Mr Hazelden consents to the inclusion in this
announcement of the matters based on their information in the form and context in which it appears.
Information in this report relating to Mineral Resource estimation and Exploration Results is based on information reviewed b y Mr
Jeremy Peters who is a Fellow of the Australasian Institute of Mining and Metallurgy and a Chartered Professional Geologist a nd
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 clay-hosted rare earth mineralisation to qualify as a Competent Person as defined by the 2012 Editi on of the
Australasian Code for reporting of Exploration Results, Mineral Resources and Ore Reserves. Mr Peters consents to the inclusi on of
the data in the form and context in which it appears.
Aspirational Production Target Cautionary Statement
The Company cautions that the above aspirational statement of prospective production and the aspirational production target
ranges adopted in the optioneering study (refer ASX 11 September 2025) are conceptual in nature and the target ranges were
adopted solely to support comparative techno-economic assessment within the optioneering study. They are not production targets
or forecast financial information derived from production targets for the purposes of the Corporations Act or ASX Listing Rules and
there is a low level of geological confidence associated with any potential production parameters at this stage. Further expl oration,
engineering, and feasibility work are required before OD6 can determine the likelihood of establishing Ore Reserves and/or
production targets or before making any final investment decision. There is no certainty that the conceptual ranges adopted w ithin
the optioneering study will be realised.
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 appl icable
law. Statements regarding plans with respect to OD6 Metals projects are forward looking statements and can generally be ident ified
by the use of words such as ‘project’,‘foresee’,‘plan’, ‘expect’, ‘aim’, ‘intend’, ‘anticipate’, ‘believe’, ‘estimate’, ‘m ay’, ‘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 docum ent
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 affil iates
and their directors, officers, employees, agents and advisors disclaim any liability whether direct or indirect, express or limited,
contractual, tortuous, statutory or otherwise, in respect of, the accuracy, reliability or completeness of the information in this
document, or likelihood of fulfilment of any forward-looking statement or any event or results expressed or implied in any forward-
looking statement; and do not make any representation or warranty, express or implied, as to the accuracy, reliability or
completeness of the information in this document, or likelihood of fulfilment of any forward-looking statement or any event or
results expressed or implied in any forward-looking statement; and disclaim all responsibility and liability for these forward -looking
statements (including, without limitation, liability for negligence).
No new information
Except where explicitly stated, this announcement contains references to prior exploration results, all of which have been cr oss-
referenced to previous market announcements made by the Company. The Company confirms that it is not aware of any new
information or data that materially affects the information included in the relevant market announcements.
The information in this report relating to the Mineral Resource estimate for the Splinter Rock Project is extracted from the
Company’s ASX announcements dated 24 May 2024. OD6 confirms that it is not aware of any new information or data that
materially affects the information included in the original announcement and that all material assumptions and technical parameters
underpinning the Mineral Resource estimate continue to apply
This announcement has been authorised for release by the Board of OD6 Metals Limited
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About OD6 Metals
OD6 Metals is an Australian public company pursuing exploration and development opportunities within the
critical minerals sector, namely rare earths and copper.
Rare Earth Elements
OD6 Metals has successfully identified clay hosted rare earths at its 100% owned Splinter Rock Project which is
located in the Esperance-Goldfields region of Western Australia.
The Company released a Mineral Resource Estimate (MRE) for Splinter Rock in May 2024, confirming that the
project hosts one of the largest and highest-grade clay-hosted rare earths deposits in Australia with an
Indicated Resource of 119Mt @ 1,632ppm TREO and an Inferred Resource of 563Mt @ 1,275ppm TREO with an
overall ratio of ~23% high-value Magnetic Rare Earths (MagREE).
OD6 Metals believes that Splinter Rock has all the hallmarks of a world class rare earths project with a
conceptual heap leach development which utilises the large and high-grade Splinter Rock resource to support a
long-life REE operation.
Copper
The Company is advancing the Gulf Creek Copper-Zinc VMS Project located near the town of Barraba in NSW,
Australia.
Gulf Creek was mined at around the turn of the 20th century and was once regarded as the highest-grade
copper mine (2% to 6.5% Cu) in NSW until its closure due to weak copper prices in 1912. Very little exploration
has occurred at the project in over 100 years, with OD6 aiming to apply modern day exploration technologies.
The 2025 maiden drilling program successfully defined high grade copper below the historical mine plus
confirmed the strong relationship between magnetism and massive sulphide mineralisation. Geophysical
modelling has identified multiple, high priority and untested targets ready for drilling providing over >3km of
untested strike in the immediate mine-stratigraphy, and over >10km across the tenement.
Corporate Directory
Managing Director
Non-Executive Chairman
Non-Executive Director
Financial Controller/ Joint Company Secretary
Joint Company Secretary
Contact
OD6 Metals Ltd
ACN 654 839 602
www.od6metals.com.au
Mail to: info@od6metals.com.au
Phone: +61 8 6189 8515
Level 1, 1 Alvan Street, Subiaco, WA 6008
Mr Brett Hazelden
Mr Piers Lewis
Dr Mitch Loan
Mr Troy Cavanagh
Mr Joel Ives
Investor Relations
Lucas Robinson
Corporate Storytime
lucas@corporatestorytime.com
Phone: +61 408 228 889
8
JORC 2012 – Table1: Splinter Rock
Section 1 Sampling Techniques and Data
(Criteria listed in the preceding section also apply to this section)
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 (eg ‘reverse circulation drilling was
used to obtain 1 m samples from which 3
kg was pulverised to produce a 30 g
charge for fire assay’). In other cases more
explanation may be required, such as
where there is coarse gold that has
inherent sampling problems. Unusual
commodities or mineralisation types (eg
submarine nodules) may warrant
disclosure of detailed information.
• Geochemicalsampling was undertaken by sampling of
metre interval samples returned from the cyclone of a
conventional air core drilling rig.
• Where noted OD6 is also reporting Diamond Drill Holes
(DDH). Core enclosed in plastic and then laid out
systematicallyinto core trays. The core will be used for
bulk metallurgical samples and has not been cut or
sampled.
• Certified reference samples, duplicates and blank
samples were inserted into the drillsample stream such
as to represent approximately 5% of the samples
submitted to the laboratory for analysis.
• The DDH core was measured and marked into metres
and lithological logged (including regolith).
• Two composite sampleswere collected overthree metre
intervals – the first (the A sample) being submitted for
laboratoryanalysisand the second (the B sample)being
retained as a reference.
A sample from each metre was collected and stored in a
chip tray for logging and x-ray diffraction analysis.
• Drill intercept samples for the two heap leaching
metallurgical composites were obtained from the ‘B’
samples located on the company’s Exploration Licenses.
Samples were sent to ANSTO for making up the
composites and completing the testwork.
Drilling techniques • Drill type (eg core, reverse circulation,
open-hole hammer, rotary air blast, auger,
Bangka, sonic, etc) and details (eg core
diameter, triple or standard tube, depth of
diamond tails, face-sampling bit or other
type, whether core is oriented and if so, by
what method, etc).
• Air core drilling was completed by hammer and blade
industry standard drilling techniques
• Aircore is considered to be an appropriate drilling
technique for saprolite clay
• Drilling used blade bits of 87mmØ with 3m length drill
rods to blade refusal.
• Diamond drilling carried out used a PQ sized diamond
impregnated drill bit.
• Triple tube was also used to maximise recovery,
producing continuous cylinders of sample for a
maximum run length of 3m.
Drill sample recovery • Method of recording and assessing core
and chip sample recoveries and results
assessed.
• Measures taken to maximise sample
recovery and ensure representative nature
of the samples.
• Whether a relationship exists between
sample recovery and grade and whether
sample bias may have occurred due to
preferential loss/gain of fine/coarse
material.
• Air core recoveries were not recorded but are not
considered to be materially biased, given the nature of
the geology and samples.
• Recoverywas visuallyassessed forAC and considered
to be acceptable within industry standards.
• The majority of sample were of good quality. Samples
were visually checked for recovery, moisture, and
contamination. A cyclone was used to deliver the sample
into buckets.
• DDH’s were measured and marked up every metre.
Recovery and core loss was noted and marked
accordingly by the driller and geologist.
• The relationship between sample recovery and grade
influencing sample bias is unknown at this stage.
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.
• Geologicallogging was complete in full for every hole
(AC & DDH), this includes lithology, weathering,
oxidation state, alteration, veining, mineralisation if
present. Considered appropriate forthisstyle of drilling
and the stage of the project. All holes were chipped for
the entire hole for a complete chip tray record.
• Geologicallogging isinherently qualitative. More specific
logging may be undertaken if chemicalanalyseswarrant
it.
• All holeswere logged for the entire length of the hole.
9
Criteria JORC Code explanation Commentary
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.
• For DDH, PQ core hasnot been cut and sampled, core
has been sent whole to ANSTO for bulk metallurgical
testing.
• For AC drilling, a composite sampleof ~3kg for analysis
was taken using a scoop from each metre pile to
subsample 1 to 1.5kg sample. Thiswas then dispatched
to the laboratory for geochemical analysis.
• A second composite sample was similarly taken and
stored on site as a reference sample.
• Sampling technique isappropriate for the drilling method
and stage of the project.
• Certified reference samples, duplicates and blank
samples were inserted into the sample stream such as
to represent approximately5% of the samplessubmitted
to the laboratory for analysis.
• Heap Leach test samples were composited from the B
samples by weight to reflect the intercept length to
maintain representativity and minimise any bias
• Sample size is considered appropriate for the grainsize
of the sampled material and is considered industry
standard.
Quality of assay data
and laboratory tests
• The nature, quality and appropriateness of
the assaying and laboratory procedures
used and whether the technique is
considered partial or total.
• For geophysical tools, spectrometers,
handheld XRF instruments, etc, the
parameters used in determining the
analysis including instrument make and
model, reading times, calibrations factors
applied and their derivation, etc.
• Nature of quality control procedures
adopted (eg standards, blanks, duplicates,
external laboratory checks) and whether
acceptable levels of accuracy (ie lack of
bias) and precision have been established.
• Diamond core has not yet been analysed.
• Aircore drilling “A Samples”were submitted for chemical
analysis using industrystandard sample preparation and
analytical techniques including:
• Riffle split all “A samples” to 50:50 bagging one half
as a coarse reject for storage
• Pulverise the balance of the material via LM-5
• Generate a standard 300g master pulp packet
• Bag the balance as a bulk pulp master for storage
• Multi-Element Ultra Trace method ME-MS61r for
exploration in soils orsediments. 4-Acid digeston 0.25g
sample analysed via ICP-MS and ICP-AES. REEs
included.
• The final column residues were also analysed. The
following techniques were used:
• XRF at ANSTO for major gangue elements (Al, Ca,
Cu, Fe, K, Mg, Mn, Na, Ni, P, Si, Sr, Zn) and a
range of minor elements
• The REEs along with Y, U, Th and Sc in the
samples will be analysed by tetraborate fusion
digest/ICP-MS (lithium tetraborate method) and four
acid digest/ICP-MS at ALS Geochemistry
Laboratory, Brisbane.
• Standards and laboratorychecks have been assessed
and show resultswithin acceptable limits of accuracy,
with good precision in most cases.
Verification of sampling
and assaying
• The verification of significant intersections
by either independent or alternative
company personnel.
• The use of twinned holes.
• Documentation of primary data, data entry
procedures, data verification, data storage
(physical and electronic) protocols.
• Discuss any adjustment to assay data.
• Significant intersectionsare calculated by experienced
geologistsand verified by an independent consultant.
• Diamond drillholes are twin holes of previously reported
AC holesto provide materialfor metallurgical testwork.
• Data is stored in a database, with auto-validation of
logging data.
• Raw assays are also databased with elemental values
calculated to oxide for 15 REE’s.
• Multielement results (REE) are converted to
stoichiometric oxide (REO) using element-to-
stoichiometric conversion factors.
Element ppm Conversion Factor Oxide Form
Ce 1.2284 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
10
Criteria JORC Code explanation Commentary
Nd 1.1664 Nd2O3
Pr 1.2082 Pr6O11
Sm 1.1596 Sm2O3
Tb 1.1760 Tb4O7
Tm 1.1421 Tm2O3
Y 1.2699 Y2O3
Yb 1.1387 Yb2O3
• Rare earth oxide is the industry accepted form for
reporting rare earths. The followingcalculationsare used
for compiling REO into their reporting and evaluation
groups:
• TREO (Total Rare Earth Oxide)
= La2O3 + CeO2 + Pr6O11 + Nd2O3 + Sm2O3 + Eu2O3 +
Gd2O3 + Tb4O7 + Dy2O3 + Ho2O3 + Er2O3 + Tm2O3 +
Yb2O3 + Lu2O3 + Y2O3.
Note that Y2O3 is included in the TREO calculation.
Location of data points • Accuracy and quality of surveys used to
locate drill holes (collar and down-hole
surveys), trenches, mine workings and
other locations used in Mineral Resource
estimation.
• Specification of the grid system used.
• Quality and adequacy of topographic
control.
• Drill hole collarswere located using a handheld GPS to
+/-5m accuracy.
• Grid system was MGA 94 Zone 51.
• Downholesurveywas not undertaken, the holes being
vertical.
• RL’s estimated from a digital elevation modelwith points
gained as a component of an aeromagneticsurvey. The
datum may have some error, but RL of holes should be
relative to each other and fit for purpose on a hole to
hole basis.
Data spacing and
distribution
• Data spacing for reporting of Exploration
Results.
• Whether the data spacing and distribution
is sufficient to establish the degree of
geological and grade continuity
appropriate for the Mineral Resource and
Ore Reserve estimation procedure(s) and
classifications applied.
• Whether sample compositing has been
applied.
• Drillholeswere approximately400m apart and infilled to
to approximately200m centres where drilling returned
elevated REE assays. Diamond holes were twin holes
drilled within 5m of existing AC holes.
• Aircore: Downhole samples were taken on 3m
composite samples and bottom of hole (BOH) 1m
intervals.
• DDH: samples have not yet been taken or analysed.
• This drilling indicated excellent continuity, particularly
when supported by the resultsof the Tempest Airborne
AeromagneticSurvey, which was used to define basin
limits.
• Tempest Airborne Electromagnetic Survey (AEM),
undertaken by Xcalibur Multiphysics.
• Data collected using the TEMPEST EM system (50Hz)
using fixed wing aircraft.
• Nominal flight height of 120 m above ground level.
• GPS cycle rate of 1 second, accuracy 0.5m.
• Altimeter accuracy of 0.05m.
• Flight line spacing 400 to 800m.
• Conductivity measurements and sampling interval at
approximately 11 to 12 metres along line.
• This data when combined with further drilling will be
utilised to guide future mineralresource estimation and
updates.
Orientation of data in
relation to geological
structure
• Whether the orientation of sampling
achieves unbiased sampling of possible
structures and the extent to which this is
known, considering the deposit type.
• If the relationship between the drilling
orientation and the orientation of key
mineralised structures is considered to
have introduced a sampling bias, this
should be assessed and reported if
material.
• Drillholeswere vertical and approximatelyperpendicular
to mineralisation hosted in flat lying clay-beds of
Proterozoic clay saprolite.
• This orientation is not considered by the Competent
Person to have introduced material sampling bias.
• For AEM data: Flight lines are North West- South East:
drainage and regolith patterns show a regional slope
down f
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