AR3 intersects shallow Uranium occurrence at Overland
Released
Released
Announcement PDF
6 March 2025
AR3 intersects shallow Uranium
occurrence at Overland
Highlights:
•
New shallow Uranium occurrence identified: Drill hole OV047 encountered a 6
meter interval of carbonate-cemented sediments from 27 meters, with anomalous
gamma and pXRF uranium readings.
•
Potential for the presence of an additional uranium model: Hole OVO47
demonstrates potential for near-surface, calcrete-hosted mineralisation (see Figure
1) - similar to uranium deposits 1 mined in Namibia 2 - in addition to AR3’s initial
palaeochannel hosted ISR amenable uranium deposit targets.
•
Accelerated follow-up drilling: Drilling program will re-commence in the week
beginning 10 March 2025 to follow up the shallow uranium occurrence intersected
in hole OV047.
•
Rapid assay and minerology analysis: Samples generated from hole OV047 are
being prioritised for assay and mineralogical determinations.
•
Palaeovalley extension confirmed with multiple Uranium targets: Drilling has
successfully defined the southern extension of a key palaeovalley within the
southern portion of EL7001 and extending into EL6678 (See Figure 2).
•
Engage with this announcement at the AR3 investor hub.
AR3 Managing Director and CEO, Travis Beinke, said:
“The intersection of a shallow uranium occurrence in OV047 is a significant step forward in our
exploration program at Overland. The identification of shallow mineralisation, coupled with the
confirmation of the palaeovalley's southern extension, underscores and reinforces the potential of this project.
Our systematic approach to exploration and targeted drilling, continues to deliver results. We
are excited to accelerate our follow up drilling to further delineate the extent of this new uranium
occurrence and test the numerous high-priority targets we have identified. We look forward to
reporting further results as we continue our drilling program through to the end of April."
See Paladin Energy (ASX: PDN) release 2 April 2024 “Commercial production achieved at the Langer
Heinrich Mine”
2
Wilde, A. Towards a Mineral Systems Model for Surficial Uranium Mineralization Based on Deposits in
the Erongo District of Namibia. Minerals 2023, 13, 149. https://doi.org/10.3390/min13020149
1
Figure 1: Strip log displaying drillhole OV047 lithology, natural gamma responses (cps) and pXRF uranium responses (ppm U).
In relation to the disclosure of pXRF results, the Company cautions that estimates of uranium elemental abundance from
pXRF results should not be considered a proxy for quantitative analysis of a laboratory assay result. Assay results are required
to determine the actual widths and grade of the mineralisation. The company uses an Olympus Vanta M Series portable X-ray
Fluorescence (pXRF) analyzer to screen Air Core drilling samples for mineralization prior to submitting samples to a
commercial laboratory for assay. This provides an initial understanding of the mineralization distribution before sampling,
ensuring submitted samples are representative of the targeted mineralization. While pXRF confirms the presence of
mineralization, it does not accurately determine elemental concentrations due to limitations such as a small analysis window,
uneven distribution, shallow penetration depth, and irregular surfaces. The pXRF results are indicative and the pXRF readings
are subject to confirmation by chemical analysis from an independent laboratory.
Australian Rare Earths Limited (ASX: AR3) is pleased to announce highly encouraging results
from its ongoing exploration drilling program at the Overland Uranium Project.
The 2025 program, which began 30 January 2025, has focused on mapping the newly defined
palaeovalley (refer ASX release 21 January 2025) further south within EL7001 and onto the Sheer
Gold Farm-In tenure, EL6678 3. A total of 22 drillholes has been completed, totaling 3,010 meters,
illustrated in Figure 2.
Target 1 of EL6678, drillhole OV047 has intersected a 6 meter interval containing anomalous
gamma and pXRF Uranium (U) responses. Gamma responses peaked at 741 counts per second
(cps), with maximum pXRF uranium response of 105ppm U. This surficial uranium occurrence is
similar to uranium mineralisation found in Namibia’s surficial uranium deposits, like Paladin
Energy’s Langer Heinrich Mine. Similar calcrete-hosted deposits are also found in Western
Australia 4 at Cameco Corporation’s Yeelirrie deposit and Toro Energy’s Wiluna project.
The identification of another potential uranium occurrence model at Overland highlights the
region’s fertility, where uranium in solution enters the basin and is captured at various
geochemical interfaces within the sedimentary sequences. Drillhole OV047 shows anomalous
uranium responses over a 6 meter interval from 27 meters and displayed the highest gamma
response yet seen at the base of oxidation interface with reduced sediments. These findings
suggest potential for both deeper palaeochannel hosted, in-situ recoverable (ISR) deposits and
shallow surficial deposits in this setting.
ASX: AR3 Release 19 Nov 2024
Bijal Chudasama, Alok Porwal, Ignacio González-Álvarez, Sanchari Thakur, Andy Wilde, Oliver P. Kreuzer,
Calcrete-hosted surficial uranium systems in Western Australia: Prospectivity modeling and quantitative
estimates of resources. Part 1 – Origin of calcrete uranium deposits in surficial environments: A review,
Ore Geology Reviews, Volume 102, 2018, Pages 906-936, ISSN 0169-1368,
https://doi.org/10.1016/j.oregeorev.2018.04.024.
3
4
Figure 2: Overland drilling (2024 & 2025) with airborne radiometrics, alluvial sediment channels, and interpreted
palaeochannel boundary based on recent drilling. Target 1/OV047 has been prioritized for follow up drilling. Note: The airborne
radiometric image and Alluvial Sediment Outline is publicly available data sourced from SARIG ( https://map.sarig.sa.gov.au)
and detailed within the appendices of this report.
Figure 3: Cross section A-A1 across the defined palaeovalley showing lithology, pXRF U (ppm), and Gamma (CPS) see Figure
2 for section location plan.
Figure 4: Cross section B-B1 across the defined palaeovalley showing lithology, pXRF U (ppm), and Gamma (CPS) see Figure
2 for section location plan.
Next steps
AR3’s initial 2025 drilling program will be extended and will follow up the shallow uranium
occurrence intersected in hole OV047 to determine its extent.
Samples recovered from drillhole OV047 are being prioritised for chemical assay and sub
samples are being assessed for mineralogical characteristics informing the nature of the
uranium mineralisation and its potential for economic recovery. In addition, initial high priority
targets on EL6678 will be drill tested targeting deeper palaeochannel hosted, in-situ recoverable
(ISR) deposits.
Drilling will also target the highly prospective drill targets along the western margin of a
palaeovalley setting within EL7001 defined through drilling completed in 2024 and more recently
in 2025 (Figure 2).
The announcement has been authorised for release by the Board of Australian Rare Earths Limited.
For further information please contact:
Australian Rare Earths Limited
Travis Beinke
Managing Director and CEO
T: 1 300 646 100
Media Enquiries
Jessica Fertig
Tau Media
E: info@taumedia.com.au
Engage and Contribute at the AR3 investor hub: https://investorhub.ar3.com.au/
Competent Person’s Statement
The information in this report that relates to Exploration results is based on information compiled by Australian
Rare Earths Limited and reviewed by Mr Rick Pobjoy who is the Chief Technical Officer of the Company and a
member of the Australian Institute of Mining and Metallurgy (AusIMM). Mr Pobjoy has sufficient experience that
is relevant to the style of mineralisation, the type of deposit under consideration and to the activities undertaken
to qualify as a Competent person as defined in the 2012 edition of the “Australasian Code for Reporting of
Exploration Results, Mineral Resources and Ore Reserves”. Mr Pobjoy consents to the inclusion in this report of
the matters based on this information in the form and context in which it appears.
About Australian Rare Earths Limited
Australian Rare Earths is committed to the timely exploration and development of its 100% owned, flagship
Koppamurra Project, located in the new Koppamurra rare earths Province in southeastern South Australia and
western Victoria. Koppamurra is a prospective ionic clay hosted rare earth deposit, rich in all the elements
required in the manufacture of rare earth permanent magnets which are essential components in electric
vehicles, wind turbines and domestic appliances. In addition, AR3 is actively reviewing other potential
prospective areas which may also host uranium and ionic clay hosted rare earth deposits throughout Australia.
The Company is focused on executing a growth strategy that aims to position AR3 as an independent and
sustainable source of energy transition metals, playing a pivotal role in the global transition to a green economy.
JORC Table 1
Criteria
Sampling
techniques
Section 1 Sampling Techniques and Data
Explanation
Comment
Nature and quality of
Air Core drilling methods were used to obtain
samples from the Overland drilling program
sampling (e.g., cut
channels, random chips, or between October-December 2024 and JanuaryMarch 2025
specific specialised
industry standard
The following information details the Air Core drill
measurement tools
sampling process:
appropriate to the
minerals under
• All Air Core drill samples were collected from
investigation, such as
the rotary splitter mounted at the bottom of
down hole gamma sondes,
the cyclone into a pre‐numbered calico bag.
or handheld XRF
The samples were geologically logged at 1 m
instruments, etc). These
intervals.
examples should not be
taken as limiting the broad • Based on hole‐diameter, generic material
density and a 20% split on the cyclone
meaning of sampling.
samples averaged ~1.5‐2.5 kg in mass.
Include reference to
measures taken to
• Chip trays were used to collect a
ensure sample
representative sample for each 1m sample
representivity and the
interval for each hole.
appropriate calibration
• After the samples were collected within the
of any measurement
calico bags, they were screened for
tools or systems used.
anomalous gamma radiation using a
Aspects of the
handheld Ranger EXP survey meter (S/N
determination of
R318772) calibrated 23/09/2024 prior to
mineralisation that are
being geologically logged and tested with a
Material to the Public
pXRF at the drill site.
Report. In cases where
‘industry standard’ work
has been done this would
be relatively simple (e.g.,
‘reverse circulation drilling
was used to obtain 1 m
samples from which 3 kg
was pulverised to produce
a 30 g charge for fire
assay’). In other cases,
more explanation may be
required, such as where
there is coarse gold that
has inherent sampling
problems. Unusual
commodities or
mineralisation types (e.g.,
•
The gamma screening was conducted by
placing the handheld Ranger survey meter
~10cm from the calico sample for 5‐10sec and
noting the dose rate in µSv. If elevated dose
rates were detected the field crew was then
notified before any additional sample logging
was conducted and the anomalous reading
recorded in the geological log.
•
A handheld Olympus Vanta pXFR Analyser
(Model Vanta M Series S/N 842924) was used
to assess the geochemistry of the Air Core
samples in the field. The pXRF analysis
provided screening analysis to characterize
the sample lithology and full suite of
elements.
•
The pXRF sampling was analized through the
calico bag with a beam count time of 20-30
sec beam 1 and 10 sec beam 2. One pXRF
analysis
submarine nodules) may
warrant disclosure
of detailed information.
per sample was performed.
•
Samples are laid on a workbench and
flattened to create a stable surface for the
pXRF. The pXRF is placed on the sample with
the beam down for the analysis.
•
All readings were taken at ambient
temperatures between 10 and 45 degrees
Celsius. The Olympus Vanta is rated
for continuous
operation
within
these temperatures.
•
Samples range from dry to wet, this is
dependent on which formation is
being intercepted and whether drilling
water has been injected.
•
A Uranium standard Oreas 121 (215 ppm U,
sourced from Mantra Resources
Nyota Prospect, Tanzania, which is a
Tabular Sandstone hosted deposit) was
used to verify the accuracy of the pXRF
before and after each analysis session.
•
The OREAS 121 standard was prepared using
an industry standard pXRF sample cup and
analized for 20-30 sec on beam 1 and 10 Sec
on beam 2.
•
A silica blank is used to monitor the
accumulation of contamination on the lens
of the pXRF. Analysis of the blank
is undertaken before and after each analysis
session.
•
Review of pXRF standard and blank data is
checked to ensure the pXRF is operating
correctly before and after each session.
•
Samples were selected for assay at the end
of the hole based on geology, pXRF, and
natural downhole gamma response.
•
Field duplicates were taken at a rate of
~1:40 and inserted blindly into the sample
batches.
•
Field Standards were taken at a rate of ~1:40
and inserted blindly into the samples batches.
•
Samples were submitted to Bureau Veritas
in Adelaide for analysis. The sample
weights were recorded (wet and dry) and
samples
were oven dried at 105 degrees for a
minimum of 24 hours. The samples were
secondary crushed to 3 mm fraction and then
pulverised to 90% passing 75 µm. Excess
residue was maintained for storage while the
rest of the sample placed in 8x4 packets and
sent to the central weighing laboratory. The
samples were submitted for analysis using
Mixed Acid Digest – Lithium Borate Fusion
ICP‐MS method (BV Code SC302) for Ag (0.1),
Al (100), As (1), Ba (1), Be
(0.5), Bi (0.1), Ca (100), Cd (0.5), Ce (0.1), Co
(1), Cr (10), Cs (0.1), Cu (1), Dy (0.05), Er
(0.05), Eu (0.05), Fe (100), Ga (0.2), Gd (0.2),
Hf (0.2), Ho (0.02), In (0.05), K (100), La (0.5),
Li (0.5), Lu (0.02), Mg (100), Mn (2), Mo (0.5),
Na (100), Nb (0.5), Nd (0.05), Ni (2), P (100),
Pb (1), Pr (0.2), Rb (0.2), Re (0.1), S (50), Sb
(0.1), Sc (1), Se (5), Si (100), Sm (0.05), Sn (1),
Sr (0.5), Ta (0.1), Tb (0.02), Te (0.2), Th (0.1),
Ti (50), Tl (0.1), Tm (0.2), U (0.1), V (5), W
(0.5), Y (0.1), Zn (2), Zr (1), Yb (0.05)
• Select samples, often at the bottom of the
thought
to
be
weathered
holes
basement/saprolite material were also
analyzed for gold using Lead collection Fire
Assay AAS (BV Code FA001)
• A laboratory repeat was taken at ~ 1 in 21
samples;
• Commercially obtained standards were
inserted by the laboratory at a rate of ~ 1 in
9 into the sample sequence.
•
After the hole was drilled to completion a
Reflex EZ Gamma logging tool (serial number
GAM‐043) rented from Imdex, and operated
by the drilling crew was run down the hole,
inside the rods/innertube to log the natural
gamma response of the sediments. The
gamma tool was last calibrated by Imdex on
October 9th 2024 as noted in the provided
Certificate of Conformance.
•
The survey was run in and out of the hole at a
speed of no more than 10m/min and the
downhole speed was reviewed after the
survey.
•
The up (out) survey was then used to plot on
sections, after reviewing both in and out
gamma surveys.
•
Before each downhole gamma survey the
Reflex EZ Gamma logging tool was checked
with a EZ‐Gamma confidence checker by AR3
staff (S/N 025). The confidence checker was
last calibrated 29/08/24.
•
Using the EZ‐Gamma confidence checker at
the start of each run allows the gamma tool
to be checked ensuring it is within
specifications and the tool has not been
damaged or faulty providing confidence an
accurate gamma reading is collected for each
hole.
•
The check is completed by first running the
gamma tool for 5min to measure background
gamma, then a second survey after sliding
the EZ‐Gamma Confidence checker over the
gamma probe and subtracting the
background. The resulting pass value of ~600
cps +/‐ 5% is required before the survey tool
is confirmed as operating within expected
limits.
•
After the gamma survey is completed the
data is uploaded to the Imdex hub IQ portal
(https://iq.imdexhub.com) from the rig via
satellite internet and available for review.
•
The Fairview uranium occurrence shown on
maps within this report is based on reported
SA Geodatabase Reference sample #152296
(Explorers sample 45835) sourced from the
SA Geodatabase available on SARIG
https://minerals.sarig.sa.gov.au/RockSamp
leDetails.aspx?SampleNo=45835
• Sample #152296 was collected by A.F. Crooks
on 20/08/1984 and the sample was analyzed
by XRF. Details on the lab or XRF
device were not specified.
Drilling
techniques
Drill type (e.g., core,
reverse circulation, open‐
hole hammer, rotary air
blast, auger, Bangka,
sonic, etc) and details
(e.g., core diameter, triple
or standard tube, depth of
diamond tails, face‐
•
•
Drilling was completed using a Wallis “Mantis
200”Air Core drill rig with an onboard Sullair
compressor (560cfm @ 200psi).
Aircore drilling is a form of reverse circulation
drilling where the sample is
sampling bit, or other
type, whether core is
oriented and if so, by what
method, etc).
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.
Logging
Whether core and chip
samples have been
geologically and
geotechnically logged to a
level of detail to support
collected at the face and returned inside the
inner tube. The drill cuttings are removed by
injection of compressed air into the hole via
the annular area between the inner tube and
the drill rod.
• Aircore drill rods used were 3 m long.
• NQ diameter (76 mm) drill bits and rods were
used.
• All aircore drill holes were vertical with
depths varying between ~50 m and 200 m.
Drill sample recovery for Air Core drilling is
monitored by recording sample condition
descriptions where ‘Poor’ to ‘Very Poor’ were
used to identify any samples recovered which
were potentially not representative of the
interval drilled.
• A comment was included where water
injection was required to recover the sample
from a particular interval. The use of water
injection can potentially bias a sample.
Minimal water injection was required during
this drilling program and used sparingly.
• Overall no consistent/significant loses of
sample material was observed.
• The rotary splitter was set to an approximate
20% split, which produced approximately
1.5‐2.5 kg sample for each meter interval.
• The 1.5‐2.5 kg sample was collected in a pre‐
numbered calico bag and the remaining 80%
(5 kg to 8 kg) was disposed directly into the
sump as drilling progressed.
• At the end of each drill rod, the drill string is
cleaned by blowing down with air to remove
any clay and silt potentially built up in the
sample pipes and cyclone.
• The relationship (if any) between sample
recovery and grade is unknown
• No sample recovery information was reported
in historical reports relating to
historical drilling within this release.
• All Air Core samples collected in calico bags
were logged for lithology, colour, cement type,
hardness, percentage rock estimate, and any
relevant comments such as moisture, sample
condition, evidence of
•
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.
•
Sub‐sampling
techniques
and sample
preparation
If core, whether cut or
sawn and whether
quarter, half or all cores
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.
reducing or oxidizing conditions, and
vegetation/organic material.
Geological logging data for all drill holes was
qualitatively logged onto Microsoft Excel
spreadsheet using a field laptop with validation
rules built into the spreadsheet including
specific drop‐ down menus for each variable.
The data was uploaded to the Australian Rare
Earths Azure Data Studio database.
Every drill hole was logged in full and logging
was undertaken with reference to a drilling
template with codes prescribed and guidance
to ensure consistent and systematic data
collection.
The density drilling is not sufficient to support
consideration of resource estimation, or
mining and no geotechnical logging was
completed.
• 1m Air Core sample interval was
homogenised within the cyclone and the
rotary splitter was set to an approximate
20% split producing around 1.5‐2.5 kg
sample for each metre interval.
• The 1.5‐2.5kg sample was collected in a pre‐
numbered calico bag and the 80% (5 kg to 8
kg) portion was disposed directly into the
sump as drilling progressed.
• Duplicates were generally taken within
intervals which indicated potential for
anomalous U mineralization based on
geology, pXRF, and gamma signature. These
duplicate samples were collected by splitting
the 1m interval by emptying the sample on
to a table, mixing and splitting into 1/8th
subsamples and randomly assigning 4 of the
splits into the duplicate and 4 remaining as
the primary.
• The 1.5‐2.5 kg sample collected in the calico
bag was logged by the geologist onsite.
• Approximately 10‐20g of sample material
from each for each 1m calico sample placed
in a chip tray.
• The logged calico samples were scanned
with a pXRF onsite through the calico bag.
• At the end of the drillhole samples were
Whether sample sizes are
appropriate to the grain
size of the material being
sampled.
selected for analysis.
• Samples selected for analysis were placed in
polyweave bags labelled with the sample
number, From‐To interval, and Hole ID, then
segregated into bulka bags for transport to
the lab for analysis.
• No correction factors were applied to pXRF
results.
• Field duplicates of all the samples were
completed at a frequency of ~1 in 40
samples. Field standards were inserted into
the sample sequence at a frequency of
~1:40. Standard reference Material (SRM)
samples were inserted into the sample
batches at a frequency rate of 1 per 10
samples by the laboratory and a repeat
sample was taken at a rate of 1 per 21
samples.
• An on‐site geologist oversaw the sampling
and logging process and selected samples for
analysis based on the logging descriptions
Pxrf analysis, and downhole gamma
response.
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 (e.g.,
standards, blanks,
duplicates, external
laboratory checks) and
whether acceptable levels
of accuracy (i.e., lack of
•The detailed geological logging of samples
provides lithology (sand/clay component)
•The 1.5 kg air core samples were assayed by
Bureau Veritas laboratory in Wingfield, Adelaide,
South Australia, which is considered the Primary
laboratory.
•The samples will be initially oven dried at 105
degrees Celsius for 24 hours. Samples will be
secondary crushed to 3 mm fraction and the
weight recorded. The sample will then be
pulverised to 90% passing 75 µm. Excess residue
will be maintained for storage while the rest of
the sample is placed in 8x4 packets and sent to
the central weighing laboratory.
•All weighed samples will then be analysed using
the Multiple Elements Fusion/Mixed Acid Digest
analytical method;
•ICP Scan (Mixed Acid Digest – Lithium Borate
Fusion) Samples are digested using a mixed acid
digest and also fused with Lithium Borate to
ensure all elements are brought into solution. The
bias) and precision have
been established.
digests are then analysed for the following
elements (detection Limits shown): Al (100) As (1)
Ba (1) Be (0.5) Ca(100) Ce (0.1) Co (1) Cr (10) Dy
(0.05) Er (0.05) Eu(0.05) Fe(100) Gd (0.2) Ho
(0.02) K (100) La (0.5) Lu (0.02) Mg (100) Mn (2)
Na (100) Nd (0.05) Ni (2) Pr (0.2) S (50) Sc (1) Si
(100) Sm(0.05) Sr (0.5) Th (0.1) Ti (50) Tm (0.2) U
(0.1) V (5) Y (0.1) Yb (0.05) Zr (1)
•
Select samples that were deemed likely to be
of basement lithology (or saprolite) were also
analyzed for Au Fire Assay with a detection
limit of (0.01)
•Field duplicates were collected and submitted at
a frequency of ~1 per 40 samples.
• Bureau Veritas will complete its own internal
QA/QC checks that include a Laboratory repeat
every 21st sample and a standard reference
sample every 9th sample prior to the results
being released.;
• Australian Rare Earths submitted field
standards at a frequency of ~1:40 samples.
• Australian Rare Earths inserted field blanks
at a frequency of ~1:40 samples.
The adopted QA/QC protocols are acceptable for
this stage of test work. The sample preparation
and assay techniques used are industry standard
and provide a total analysis.
Historical data referenced within this report is
detailed below;
•
•
The Fairview uranium occurrence an is based
on reported SA Geodatabase Reference
sample #152296 (Explorers sample 45835)
sourced from the SA Geodatabase available
on SARIG
(https://minerals.sarig.sa.gov.au/RockSample
Details.aspx?SampleNo=45835)
Sample #152296 was collected by A.F. Crooks
Verification
of sampling
and assaying
Location of
data points
on 20/08/1984 and the sample was analyzed
by XRF, details on the lab or XRF device were
not specified.
The verification of
• All results are checked by the company’s
significant intersections by Chief Technical Officer.
either independent or
• Field based geological logging for drill holes
alternative company
was entered directly into an Excel spreadsheet
personnel.
format with validation rules built into the
The use of twinned holes. spreadsheet including specific drop‐down menus
Documentation of primary for each variable. This digital data was then
data, data entry
uploaded to the Australian Rare Earths Azure Data
procedures, data
Studio database.
verification, data storage
• Assay data will be received in digital format
(physical and electronic)
from the laboratory and uploaded to Australian
protocols.
Rare Earths Azure Data Studio database.
Discuss any adjustment to • Field and laboratory duplicate data pairs of
assay data.
each batch will be plotted to identify potential
quality control issues.
• Standard Reference Material sample results
will be checked from each sample batch to ensure
they are within tolerance (<3SD) and that there is
no bias.
• U3O8 is the industry accepted form for reporting
Uranium. An oxide factor for U3O8 of 1.1793
was used for reporting throughout this report.
Accuracy and quality of
• All maps are in GDA94/MGA zone 54.
surveys used to locate drill • All overland coordinate information was
holes (collar and down‐
collected using handheld GPS utilizing
hole surveys), trenches,
GDA 1994, Zone 54. While spatial
mine workings and other
location is expected to be recovered
locations used in Mineral
within 3 – 5 m, it is possible that the
Resource estimation.
elevation can be as much as 10 m out
Specification of the grid
with respect to the currently established
system used.
geoid.
Quality and adequacy of
• Drillhole RL has been corrected using An
topographic control.
Australian wide SRTM. The 1 second
SRTM Level 2 Derived Smoothed Digital
Elevation Model (DEM‐S) is derived from
the 2000 SRTM. The DEM‐S has a ~30m
grid which has been adaptively
smoothed to improve the representation
of the surface shape and is the preferred
method for shape and vertical accuracy
from STRM products. The smoothing
process estimated typical improvements
in the order of 2‐3 m. This would make
the DEM‐S accuracy to be of
approximately 5 m.
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
• Locations of Overland drill holes are
reported within the appendices of this
report.
•
No geological or grade continuity estimations
are being determined from the Overland
drilling data.
applied.
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.
•
All Overland drill holes were drilled
vertically as detailed in the appendices of
this report.
•
There is no indication that a sampling
bias exists as the geology is relatively flat
lying therefore vertical holes are
appropriate.
Sample
security
The measures taken to
ensure sample security.
•
•
Audits or
reviews
The results of any audits
or reviews of sampling
techniques and data.
After logging, the samples in calico bags
were tied and placed into polyweave bags,
labelled with the d
Share your feedback
Discover