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IRIS METALS LIMITED Capital/Financing Update 2024

Aug 29, 2024

65139_rns_2024-08-29_3d89340c-bec1-4c12-9869-92f4ef25ed12.pdf

Capital/Financing Update

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ASX:IR1 - ASX RELEASE I 30 August 2024

Demonstrates Scale and Potential of South Dakota Tenure

HIGHLIGHTS

  • Initial regional exploration work across IRIS Metals’ substantial mineral tenure in the Black Hills of South Dakota has yielded nine exciting new exploration targets showing strong lithium potential

  • Geochemical exploration has identified lithium bearing pegmatite targets under cover and can estimate potential lithium enrichment

  • IRIS is advancing this work to evaluate the Company’s resource growth potential and identify near to mid-term drill targets

  • Iris’ comprehensive internal geochemical database showcases the exceptional quality of its top projects, underscoring the world-class nature of the spodumene-bearing pegmatites found in the Black Hills

  • The IRIS team continues to advance the Beecher Project towards a maiden mineral resource estimate with plans to include the Tin Mountain Project in this work

IRIS Metals Limited (ASX: IR1) (“IRIS” or “the Company”) is pleased to announce initial findings from the first large scale field program across the Company’s substantial mineral tenure within the Black Hills of South Dakota, USA.

The results reveal the significant growth potential of the Company’s resources with hundreds of outcropping pegmatites mapped, completion of gridded soil sampling for exploration under cover, and initial geochemical reconnaissance completed for pegmatite vectoring and lithium potential.

IRIS Metals President of U.S. Operations, Matt Hartmann, commented:

“The regional exploration activities undertaken by Iris has led to the discovery of new, promising drill targets. Through geochemical analysis of pegmatite mineralogy, we can rapidly vector across large, weathered pegmatite bodies to locate spodumene rich zones for further evaluation. This gives us a significant edge as we continue to explore the full potential of our projects in parallel with the near-term development story currently unfolding at our Beecher Project.”

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Background

IRIS’ mineral properties located in the Black Hills of South Dakota consist of over 20,300 hectares of mineral rights secured through a combination of patented and unpatented mineral claims.

These claims contain hundreds of mapped pegmatites (Figure 1). Over 20 were noted to have spodumene mineralisation during historical mining operations which were active from the 1920s through to the 1980s for primarily mica and feldspar and avoided high-grade spodumene zones. These mines were generally artisanal in scope, with significant outcrop and exploration potential exposed at the surface.

During the US Summer 2024 field season, IRIS has focused on reconnaissance of these historic mines, working out from the highest priority targets towards the periphery to understand mineralogy, strike length, surface grades and potential resource volumes.

The assessment was done with a combination of detailed field mapping, soil sampling, surface grab samples and laser-induced breakdown spectroscopy (LIBS) geochemistry. LIBS offers rapid analysis focusing on lithium mineralisation potential, which allows the field teams to vector in on a target as quickly as the same day.

Soils and mono-mineralic sample separates were all analysed using the calibrated LIBS device, using third-party labs for independent verification of results.

These exploration activities have only begun to show the potential of the IRIS mineral tenure in the Black Hills of South Dakota. The IRIS team will continue to evaluate the land package in search of additional lithium bearing pegmatites worthy of drill testing. Future work will begin to focus on less understood portions of the tenure, applying the knowledge gained during this summer field season.

Soil Sampling & Mapping

Over the past three months, the IRIS field team (Photo 1) has completed twelve (12) major soil sampling grids covering 7.6km[2] and totaling over 3,700 individual samples. This work was focused on high priority targets across the IRIS mineral tenure with a special interest in historical mining operations. The targets were chosen based on a combination of historical literature and local knowledge. The goal of the program was to identify potential mineralisation along strike, as well as any potential targets under cover that would not have been identified during historic mining operations.

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Photo 1 - IRIS field team in action sampling soils

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While soils from this field program are still being analysed in house, the analytical results and interpretation completed to date show strong lithium trends beyond known outcropping pegmatites with historical mining operations, as well as additional targets identified in areas of no historical activities. In total, IRIS has identified nine (9) new exploration targets showing strong potential through soil sampling, rock ship sampling and detailed outcrop mapping.

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Figure 1 - Location of mapped pegmatites across the IRIS mineral tenure in the Black Hills of South Dakota

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Advanced LIBS Methodology for Exploration Targeting

IRIS utilises a SciAps Z-903 multi-element device with post-manufacturer calibrations that can detect trace element geochemistry ideally suited for lithium pegmatites. The unit is being used to test multiple matrix types including soils, mica mineral separates, feldspar mineral separates and whole rock pulp samples. Soil samples are validated using a third-party independent lab for verification of results periodically, with all results maintaining acceptable tolerances for soil geochemistry.

IRIS has adopted advanced LIBS methodologies for rapid analysis of pegmatites building upon the work published by Wise et. al. 2022[1] . This research demonstrated positive identification of spodumene bearing pegmatites based on blind mineral separate samples.

The advanced LIBS methods applied by IRIS have proven particularly effective in mapping pegmatite outcrops. Mica (muscovite) separates have been utilised by the Company for rapid analysis of surface outcrops. This rapid geochemical analysis significantly aided in the detailed mapping efforts, allowing for understanding of cryptic cross-cutting relationships, as well as geochemical vectoring towards mineralisation within the large pegmatite systems (Figure 2).

Mono-mineralic sample analysis has proven extremely useful in areas with surface weathering where lithium depletion has occurred. This method allows for the visualisation of true geochemistry where rock chip samples would not demonstrate the complete lithium endowment of a pegmatite in fresh unweathered conditions at depth.

With the ability to see past weathering in surface exposures, IRIS has utilised mono-mineralic muscovite sampling in tandem with un-weathered surface rock samples to vector towards higher grade and more chemically prospective areas (Figure 3) The ability to achieve instantaneous results on vector direction in the field has increased the speed of geologic understanding, allowing for a larger field area to be mapped within a single field season.

Due to the abundance of pegmatite bodies in the South Dakota project this technique has been invaluable for the mapping of fertile vs. non-fertile outcrops that in some cases are cross-cutting. The rapid understanding of geochemical prospectivity and fertility allows for little time to be wasted on undesired geology.

The combination of the accuracy and rapid analysis times of the LIBS matched with detailed field mapping proves to be a very effective method with which the Company plans to continue to enhance the current exploration model.

Furthermore, IRIS has completed a significant amount of geochemical testing of mono-mineralic muscovite samples. When considered in conjunction with the graph shown in Figure 4 which shows the geochemical plots of major pegmatites globally (the yellow stars indicate the Beecher and Tin Mountain projects), the Company concludes that the high levels of chemical fractionation and high levels of lithium indicate that on a global scale, the South Dakota region is a world class location for pegmatite exploration.

1 Wise, M.A.; Harmon, R.S.; Curry, A.; Jennings, M.; Grimac, Z.; Khashchevskaya, D. Handheld LIBS for Li Exploration: An Example from the Carolina Tin-Spodumene Belt, USA. Minerals 2022 , 12 , 77. https://doi.org/10.3390/min12010077

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Figure 2 - Analysis of soils data with the LIBS indicates both new lithium trends, and extension of known outcropping mineralisation under cover at the Hunter Louise Project

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Figure 2 - LIBS based vectoring of spodumene endowment across the primary pegmatite at the Hunter Louise Project within the IRIS mineral tenure.

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Figure 4 - Graph modified from Wise et. al. 2022, showing Muscovite data points from major pegmatite districts globally. Yellow stars represent Iris Metals’ Beecher and Tin Mountain projects and their place on the global scale

Ongoing Activities

The IRIS team continues to advance the Beecher Project towards a maiden mineral resource estimate and intends to include the Tin Mountain Project in that work. In addition to that work, IRIS is progressing with mining and ore processing studies to support potential development of one or more projects towards near-term small-scale production.

In parallel with this work, and as outlined in this release, IRIS is presently reviewing and exploring its extensive mineral tenure in the Black Hills of South Dakota, searching for additional lithium bearing pegmatites suitable for drill testing and potential future placement within a pipeline of production properties.

The Company continues to also assess and undertake due diligence on other South Dakota based tenure for acquisition.

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About The South Dakota Project

The Black Hills of South Dakota are famous for historic lithium mining dating back to 1898 when Li-bearing spodumene and amblygonite was first mined near the township of Custer. IRIS has staked 2,387 federal mineral claims and has agreements over two patented claim blocks.

Existing project areas include:

  • Beecher Project – including Longview and Black Diamond

  • Edison Project

  • Dewy Project

  • Custer Project

  • Ruby Project

  • Helen Beryl Project

  • Tinton Project

  • Keystone Project

The Beecher pegmatite trend was mined sporadically between the 1920’s and 1950’s for lithium, beryllium, tantalum, mica and feldspar. Limited amounts of lithium spodumene ore from the Beecher mines was shipped to Hill City during the 1940’s where it was processed through a flotation circuit.

IRIS’ local partner has been granted mining licenses permitting lithium pegmatite mining for these patented claims.

These mining licenses permitted by the State of South Dakota enable IRIS to fasttrack all exploration and mining activities, including the right to explore and mine lithium bearing pegmatites.

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Location of IRIS’ projects within South Dakota

ENDS

This announcement was approved for release by the Board of Iris Metals.

For further information, please contact:

COMPANY

INVESTORS & MEDIA

Peter Marks

Melissa Tempra

E. [email protected] E. [email protected]

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About IRIS Metals (ASX:IR1)

IRIS Metals Ltd (ASX:IR1) is an exploration company with an extensive suite of assets considered to be highly prospective for hard rock lithium located in South Dakota, United States (US). The company’s large and expanding South Dakota Project is located in a mining friendly jurisdiction and provides the company with strong exposure to the battery metals space, and the incentives offered by the US government for locally sourced critical minerals.

The Black Hills have a long and proud history of mining dating back to the late 1800s. The Black Hills pegmatites are famous for having the largest recorded lithium spodumene crystals ever mined. Extensive fields of fertile LCT-pegmatites outcrop throughout the Black Hills with significant volumes of lithium spodumene mined in numerous locations.

To learn more, please visit: www.irismetals.com

Forward looking Statements:

This announcement may contain certain forward-looking statements that have been based on current expectations about future acts, events and circumstances. These forward-looking statements are, however, subject to risks, uncertainties and assumptions that could cause those acts, events and circumstances to differ materially from the expectations described in such forward-looking statements. These factors include, among other things, commercial and other risks associated with exploration, estimation of resources, the meeting of objectives and other investment considerations, as well as other matters not yet known to IRIS or not currently considered material by the company. IRIS accepts no responsibility to update any person regarding any error or omission or change in the information in this presentation or any other information made available to a person or any obligation to furnish the person with further information.

Not an offer in the United States:

This announcement has been prepared for publication in Australia and may not be released to US wire services or distributed in the United States. This announcement does not constitute an offer to sell, or a solicitation of an offer to buy, securities in the United States or any other jurisdiction. Any securities described in this announcement have not been, and will not be, registered under the US Securities Act of 1933 and may not be offered or sold in the United States except in transactions exempt from, or not subject to, the registration requirements of the US Securities Act and applicable US state securities laws.

Competent Persons Statement:

The information in this announcement that relates to exploration results is based on information reviewed by Matt Hartmann, IRIS’ President of U.S. Operations, and a Competent Person who is a Member of the Australasian Institute of Mining and Metallurgy (MAusIMM) (318271), a Registered Member of the Society for Mining, Metallurgy and Exploration (RM-SME) (4170350RM). Matt Hartmann is an exploration geologist with over 23 years of experience in mineral exploration, including lithium exploration and resource definition in the western United States, and has sufficient experience in the styles of mineralisation and type of deposit under consideration and to the activity undertaken to qualify as a Competent Person as defined in the 2012 Edition of the Australian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves. Matt Hartmann has consented to the inclusion in this Public Report of the matters based on his information in the form and context in which it appears.

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JORC Code, 2012 Edition – Table 1
Section 1 Sampling Techniques and Data
(Criteria in this section apply to all succeeding sections.)
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.
Soil Samples collected are split using
half of the sample for in-house
testing and the other half for lab
verifcation.
Soil sampling protocols meet
industry standard practices.
Soil sampling is guided by a
predetermined grid and sampled to
the B horizon where possible and
overseen by a geologist. Soil samples
consist of 600g or more of soil.
All mono-mineralic samples are
taken directly from the rock/ core
sample via tweezers or rock saw. The
only preparation done to them is a
fat surface is ground into one side
(not applicable for muscovite).
Samples are analysed in 5 or more
locations across the fat face to
ensure proper internal consistency of
the mineral before recording results.
Include reference to measures
taken to ensure sample
representivity and the appropriate
calibration of any measurement
tools or systems used.
LIBS results were carried out using a
SciAps Z-903 multi-element LIBS
analyser.
Different LIBS calibrations were made
for every medium type (mica,
feldspar, soil, pulp) to ensure a known
and calibrated laser coupling effect
for consistent results.
Standard materials were used at the
start of every day and every 100
samples to ensure any drift was
within acceptable ranges.
Surface samples by nature are
preferentially chosen based on
weathering patterns and where rock
is exposed. Past the natural and
expected sample bias, not further
sample biases have been introduced.

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Soils grids were sampled based on a
predefned grid with specifc
geospatial coordinates provided to
feld crews to execute the sampling
plan.
Aspects of the determination of
mineralisation that are Material to
the Public Report.
Lithium bearing minerals including
spodumene weather to clays in the
oxidised regolith and are not
recognised when whole rock samples
contain weatheredpegmatites
Logging Logging of geospatial and geologic
data in the field
Geologic and sample data logging is
done on a tablet running a geospatial
software. Pre-designed inputs are
programmed in to allow for ease of
use and consistent data. All data
entry is validated by a geologist and
reviewed by either a senior geologist
or the exploration manager before
publication.
Whether logging is qualitative or
quantitative in nature.
Chip logging of soils is done with the
best estimates depending on the
level of weathering encountered by
the rock. Where rock chips are not
encountered in the soil sampling,
chip logging is not applicable.
The total length and percentage of
the relevant intersections logged.
All samples taken will be analysed to
ensure a complete dataset
Sub-sampling
techniques and
sample preparation
· A Quality Assurance / Quality Control
(QAQC) protocol following industry
best practices was incorporated into
the program and included systematic
insertion of marble blanks and
certifed reference materials (CRMs)
into sample batches at a rate of
approximately 5% each. Additionally,
analysis of pulp-split and course-
split sample duplicates were
completed to assess analytical
precision at different stages of the
laboratory preparation process, and
external (secondary) laboratory pulp-
split duplicates were prepared at the
primary lab for subsequent check
analysis and validation at a
secondary lab.
All protocols employed are considered
appropriate for the sample type and
nature of mineralization and are
considered the optimal approach for
maintaining representativeness in
sampling.

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If non-core, whether riffled, tube
sampled, rotary split, etc and
whether sampled wet or dry.
All samples are split with a riffe
splitter. All samples are dry.
For all sample types, the nature,
quality and appropriateness of the
sample preparation technique.
Samples are collected in a labelled
wax coated bag, with each
representing 1 soil sample location
point.
Quality control procedures adopted
for all sub-sampling stages to
maximise representivity of samples.
Standards and duplicates were
inserted every 20 samples - blanks
were inserted every 50 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.
Results of standards, duplicates and
blanks will be compared to the
expected results for quality control
Whether sample sizes are
appropriate to the grain size of the
material being sampled.
Due to soils being composed of
weathered rock, a 700g sample was
deemed suffcient to encompass a
representative suite of the minerals
encountered.
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.
Soil samples collected were shipped
to SGS Canada’s laboratory in
Vancouver, for standard sample
preparation (code PRP89) which
includes drying at 105°C, crush to 75%
passing 2 mm, riffe split 250 g, and
pulverize 85% passing 75 microns.
The samples were homogenized and
subsequently analyzed for multi-
element (including Li and Ta) using
sodium peroxide fusion with ICP-
AES/MS fnish (codes GE_ICP91A50
and GE_IMS91A50).
The assay techniques are considered
appropriate for the nature and type of
mineralization present, and result in
a total digestion and assay for the
elements of interest.
The Company relies on both its
internal QAQC protocols (systematic
soil duplicates, blanks, certifed
reference materials, and external
checks), as well as the laboratory’s
internal QAQC.
For assay results disclosed, samples
havepassedQAQC review.

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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.
Calibrations of the Sciaps Z-903
multi-element analyser were made
for each element and each matrix. 15
or more lab verifed samples were
used for calibrations, and curves were
applied based on the mathematical
signature from the geochemical
variance of each element in varying
concentrations. These calibrations
varied by matrix and the
mathematical signature varied by
element. Mathematical signature
(linear, quadratic, exponential,
logarithmic).
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.
1 in 20 soils was sent for laboratory
analysis to validate the LIBS
methodology. Out of these samples
sent, standards and duplicates were
inserted every 20 samples - blanks
were inserted every 50 samples. Along
with standard laboratory check
methods.
Verification of
sampling and
assaying
The verification of significant
intersections by either independent
or alternative company personnel.
Intervals are reviewed and compiled
by the Exploration Manager and
Project Managers prior to disclosure,
including a review of the Company’s
internal QAQC sample analytical data.
Data is stored directly into excel
templates, including direct import of
laboratory analytical certifcates as
they are received. The Company
employs various on-site and post
QAQC protocols to ensure data
integrity and accuracy.
Adjustments to data include
reporting lithium in their oxide forms,
as it is reported in elemental form in
the assay certifcates. Formulas used
are Li2O = Li x 2.1527.
All LIBS data reported is an average of
10 tests on 1 piece of material with all
analyses taking place within 1cm2or
as less as the samplepermits.
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.
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.
Sample locations were recorded
using a handheld GPS using the
NAD83_13 Datum.
Specification of the grid system
used.
Quality and adequacy of
topographic control.

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Data spacing and
distribution
Data spacing for reporting of
Exploration Results.
Sampling undertaken was of a
reconnaissance nature and
widespread across the pegmatite
bodies.
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.
Samples are generally taken on a
40m x 80m grid. Based on the nature
of soil samples and mono-mineralic
LIBS samples, no resource can be
made from the following results, but
can lead to targeting of furthermore
reliable data methods.
Whether sample compositing has
been applied.
No compositing has been applied to
the materials.
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.
Soil grids were generally designed
perpendicular to the general trend of
the pegmatites as mapped at surface
if any mapping was known. No bias
is determined.
If the relationship between the
sampling orientation and the
orientation of key mineralised
structures is considered to have
introduced a sampling bias, this
should be assessed and reported if
material.
Sample security The measures taken to ensure
sample security.
Chain of custody is maintained by Iris
personnel on site and sent in sealed
pallets and bags to the Laboratory.
Audits or reviews The results of any audits or reviews
of sampling techniques and data.
Results were reviewed and deemed
reliable for the nature of the testing.

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Section 2 Reporting of Exploration Results

Section 2 Reporting of Exploration Results
(Criteria listed in the preceding section also apply to this section.)
Criteria JORC Code explanation Commentary
Mineral tenement
and land tenure
status
Type, reference name/number,
location and ownership including
agreements or material issues with
third parties such as joint ventures,
partnerships, overriding royalties,
native title interests, historical
sites, wilderness or national park
and environmental settings.
The project is located in South
Dakota USA, the project comprises
free-hold patented claims owned by
Iris Metals
The security of the tenure held at
the time of reporting along with any
known impediments to obtaining a
licence to operate in the area.
No known impediments.
Exploration done by
other parties
Acknowledgment and appraisal of
exploration by other parties.
No modern exploration has been
conducted at this Project
Geology Deposit type, geological setting and
style of mineralisation.
LCT-pegmatite hosted lithium
spodumene mineralisation similar in
nature to other zoned lithium
pegmatite deposits mined around the
world
Drill hole
Information
A summary of all information
material to the understanding of
the exploration results including a
tabulation of the following
information for all Material drill
holes:
No drill results are being reported at
this time.
easting and northing of the drill
hole collar
elevation or RL (Reduced Level –
elevation above sea level in metres)
of the drill hole collar
dip and azimuth of the hole
down hole length and interception
depth
hole length.

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If the exclusion of this information
is justified on the basis that the
information is not Material and this
exclusion does not detract from the
understanding of the report, the
Competent Person should clearly
explain why this is the case.
Data aggregation
methods
In reporting Exploration Results,
weighting averaging techniques,
maximum and/or minimum grade
truncations (eg cutting of high
grades) and cut-off grades are
usually Material and should be
stated.
NA
Where aggregate intercepts
incorporate short lengths of high
grade results and longer lengths of
low grade results, the procedure
used for such aggregation should
be stated and some typical
examples of such aggregations
should be shown in detail.
NA
The assumptions used for any
reporting of metal equivalent values
should be clearly stated.
NA
Relationship
between
mineralisation
widths and intercept
lengths
These relationships are particularly
important in the reporting of
Exploration Results.
NA
If the geometry of the
mineralisation with respect to the
drill hole angle is known, its nature
should be reported.
NA
If it is not known and only the down
hole lengths are reported, there
should be a clear statement to this
effect (eg ‘down hole length, true
width not known’).
NA
Diagrams Appropriate maps and sections
(with scales) and tabulations of
intercepts should be included for
any significant discovery being
reported These should include, but
not be limited to a plan view of drill
hole collar locations and
appropriate sectional views.
Maps are provided in the text relevant
to the discussion of feld techniques,
type and nature of data generated
and Iris interpretations.

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Balanced reporting Where comprehensive reporting of
all Exploration Results is not
practicable, representative reporting
of both low and high grades and/or
widths should be practiced to avoid
misleading reporting of Exploration
Results.
Current data reported shows all data
generated in a geographic area,
agnostic of grade.
Other substantive
exploration data
Other exploration data, if
meaningful and material, should be
reported including (but not limited
to): geological observations;
geophysical survey results;
geochemical survey results; bulk
samples – size and method of
treatment; metallurgical test
results; bulk density, groundwater,
geotechnical and rock
characteristics; potential
deleterious or contaminating
substances.
Relevant geochemical data and
generative methodologies are
presented.
Further work The nature and scale of planned
further work (eg tests for lateral
extensions or depth extensions or
large-scale step-out drilling).
Further work is described in the text.
Overall objective is further regional
scale mapping and sampling.
Diagrams clearly highlighting the
areas of possible extensions,
including the main geological
interpretations and future drilling
areas, provided this information is
not commercially sensitive.
A presentation of potential extension
of the Hunter Louise Project is
presented. No further presentation of
possible geologic extensions is
warranted at this time.

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