Spodumene Identified LCT Pegmatite Confirmed Badja Project
Released
Released
Announcement PDF
Spodumene Identified, LCT Pegmatite Confirmed
for Badja Project, Yalgoo WA
19 September 2023
Following a review of its Badja Project’s structural and geochemistry datasets by eminent,
consulting geologist, Mr Nigel Maund, EMU NL (ASX: EMU) (“EMU” or “the Company”)
advises that a limited field survey conducted 4 September 2023 identified the presence
of LCT (Lithium-Cesium-Tantalum) pegmatites. Assessment confirms spodumene
crystals with LIBS 1 analyser equipment confirming anomalous lithium grade.
HIGHLIGHTS
LCT pegmatite occurrence positively identified at Badja whilst testing prospectivity
for LCT pegmatitic dyke swarms emanating from intrusive fractionated granite
sources adjacent to Badja’s mafic lithologies.
Spodumene crystals in identified with characteristic pink fluorescence under long
wavelength ultraviolet UV lamp.
Anomalous LIBS analyser lithium readings of 0.31% Li2O.
LCT pegmatite occurrences at Badja are thought to emanate from discrete highly
fractionated, late-stage granite plutons.
LIBS analyser testwork of sample rock, the UV fluorescing of spodumene and the visual
identification of the crystal morphology support the presence of lithium-bearing
spodumene crystals contained in mafic rock sample returned from the field. The LIBS
analyser reading on the hand samples have obtained values of 1,426ppm Li (equivalent
to 0.31% Li2 O), see Figure 1 below.
1
LIBS (Laser Induced Breakdown Spectroscopy) using Sci-Aps Z-903 LIBS with integrated argon purge, plus UV
diagnostic testing of spodumene samples using a Analytik Jena 6W UV handheld UV lamp. Refer to JORC Table
attached for further details
Page | 1
Fig 1 – Hand-specimen of spodumene crystals in LCT pegmatite showing strong pink fluorescence,
a characteristic feature under long-wavelength UV light.
Mr Maund was commissioned in July 2023 to investigate the importance of the regional
granite intrusive bodies surrounding the project area. 2 EMU’s geologists now posit that
the late-stage, fractionated, intrusive granite plutons, identified primarily from airborne
geophysical surveys, are the key drivers of high-grade gold and tungsten occurrences at
Badja. The investigation by Mr Maund revealed major LCT Pegmatite pathfinder
geochemistry and element associations in historic and recent EMU geochemistry data
relevant in the context of his overall interpretation and an exploratory field trip was
instigated.
Mr Maund has global experience in the explora on for and discovery of lithium pegma tes
among other commodi es. His study supports EMU’s view that the late-stage granite intrusions
within the broad grani c suites adjacent to Badja project had a significant influence in the
mineralisa on at Badja. The endowment of high-grade gold and tungsten mineralisa on
discoveries made by EMU, and the historic Gnows Nest Gold Mine, have been emplaced through
mul ple events of hydrothermal ac vity derived from these evolving and frac ona ng “granite
intrusive stocks”.
2
Report by Mr Nigel Maund BSc (Hons)Lond., MSc, DIC, MBA, F.Aus.IMM, FAIG, F.SEG, FGS, MMSA, Consultant
Economic Geologist “A Report on Badja Gold Project Area Near the Historic “Gnows Nest” Gold Mine,
Wadgingarra Gold Field, Badja Sta on, Western Australia”, 25 August 2023
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Fig 2 – Conceptual model for LCT pegma tes in the western and southern intrusive-mafic contacts at
Badja. Mul -element geochemistry, par cularly the immobile elements (eg., Rb, Cs & Be) supports a
late-stage frac onated granite source. Note loca on of sample and spodumene specimen reported in
this announcement.
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Fig 3 – Mul -element geochemistry for Lithium (Li) + LCT pegma te pathfinder elements Rubidium
(Rb) Caesium (Cs) & Beryllium (Be). Note strong presence along the southern intrusive contact and
(postulated) NE-trending dyke swarms.
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RELEASE AUTHORISED BY THE BOARD
For further informa on, please contact:
Doug Grewar
Chief Execu ve Officer
Emu NL
info@emunl.com.au
Investors can sign into our interac ve investor hub and join in on the conversa on with Emu
NL.
h ps://investorhub.emunl.com.au/auth/signup
EMU Investorhub QR Code
Page | 5
Emu NL
ABN 50 127 291 927
ASX Codes: EMU and EMUCA
10 Walker Ave
West Perth, WA 6005
T +61 8 9226 4266
E info@emunl.com.au
PO Box 1112
West Perth, WA 6872
Fully paid shares (listed)
1,450,021,079 (including 18.6m the
subject of the ATM which EMU can buy
back for nil consideration)
Contributing Shares (listed)
40,485,069 paid to $0.03, $0.03 to pay,
no call before 31 December 2023
Contributing Shares (Unlisted)
35,000,000 paid to $0.0001, $0.04 to
pay, no call before 31 December 2025
Options (unlisted)
172,453,621 options to acquire fully paid
shares, exercisable at $0.01 each, on or
before 7 October 2024
Performance Rights (Unlisted)
48,571,429 performance rights in
relation to acquisition of Gnows Nest
project
Directors:
Peter Thomas
Non-Executive Chairman
Terry Streeter
Non-Executive Director
Gavin Rutherford
Non-Executive Director
Tim Staermose
Non-Executive Director
Investor enquiries:
Doug Grewar CEO
M +61 419833604
E info@emunl.com.au
COMPETENT PERSON’S STATEMENT
The informa on in this report that relates to
explora on results is based on, and fairly represents
informa on and suppor ng documenta on prepared
by Nigel Maund, a Competent Person who is a Fellow
of the Australian Ins tute of Geoscien sts and a
Fellow of Australian Ins tute of Mining and
Metallurgy. Mr Maund is a consul ng geologist
commissioned by EMU NL and has sufficient
experience in the ac vity which he is undertaking to
qualify as a Competent Person as defined in the 2012
edi on of the “Australasian Code for Repor ng of
Explora on Results, Mineral Resources and Ore
Reserves”. Mr Maund consents to the inclusion
herein of the ma ers based upon his informa on in
the form and context in which it appears.
FORWARD LOOKING STATEMENTS
As a result of a variety of risks, uncertain es and
other factors, actual events and results may differ
materially from any forward looking and other
statements herein not purpor ng to be of historical
fact. Any statements concerning mining reserves,
resources and explora on results are forward looking
in that they involve es mates based on assump ons.
Forward looking statements are based on
management’s beliefs, opinions and es mates as of
the respec ve dates they are made. The Company
does not assume any obliga on to update forward
looking statements even where beliefs, opinions and
es mates change or should do so given changed
circumstances and developments.
NEW INFORMATION OR DATA
EMU confirms that it is not aware of any new
informa on or data that materially affects the
informa on included in the original market
announcements and, in the case of es mates of
Mineral Resources, which all material assump ons
and technical parameters underpinning the es mates
in the relevant market announcement con nue to
apply and have not materially changed. The Company
confirms that the form and context in which the
Competent Person’s findings are presented have not
materially changed from the original market
announcement.
Page | 6
JORC Code 2012 Edition Table 1:
Section 1 - Sampling Techniques and Data
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.
The lithium-based exploration in LCTpegmatites described in this
announcement is recent (2023) work
conducted by Emu personnel and
Consultant Economic Geologist Mr Nigel
Maund.
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.
The soil and rock chip geochemistry
referenced in this work was carried out by
Emu NL within the confines of the Badja
Project over the period 2020-2023.
All sample positions were located in the
field with a handheld Garmin GPS.
UV diagnostic testing of spodumene
samples was conducted using a Analytik
Jena 6W UV handheld UV lamp.
LIBS (Laser Induced Breakdown
spectroscopy) was conducted using a SciAps brand Z-903 handheld analyser.
Appropriate use of CRM pucks (standards)
was made during and after the sample
readings.
Surface sampling was carried out by
Company personnel following protocols
and QAQC procedures as per current
industry practice. See further details
below.
Soil samples: Sampling undertaken in a
nominal 100 x 50m grid-based spacing
along East-West orientated lines (100m
line spacings and 50m sample spacings).
All samples were collected by scraping off
the top 20cm aeolian/colluvium material
and digging a 20-40cm pit below this from
which a 1000g minus 2mm (sieved)
sample was obtained. This was split into a
1kg portion for laboratory analysis and a
smaller 250g sample for in-house pXRF
analysis and storage. Emu samples total
1153 samples and this is added to a
further 4470 historical samples which
were processed and levelled by a
consultant geochemist for meaningful
comparison.
Rock chip samples: Sampling undertaken
in various campaigns with 1-2kg of insitu
rock chips collected over discrete points,
Page | 7
Criteria
JORC Code explanation
Commentary
channels, panels or other method as
described in the sample data sheet.
All surface samples were prepared and
assayed by ALS Geochemistry, located in
Malaga, Perth.
(i)
Soil samples prepared by PUL-32
(pulverise entire sample) and
analysed by 25g aqua regia
digest, method AuME-TL43
(ii)
Rock samples prepared by
method PREP-31Y in which a split
of 250g was pulverised and
analysed for gold by Au-ICP21
(30g fire assay) and multielements ME-MS61 (33 element
4-acid digest ICP-AES finish).
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).
No drilling undertaken in the work
undertaken for this announcement.
Drill sample
recovery
Method of recording and assessing core
and chip sample recoveries and results
assessed.
Not applicable.
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 appropriate
Mineral Resource estimation, mining
studies and metallurgical studies.
Whether logging is qualitative or
quantitative in nature. Core (or costean,
channel, etc) photography.
Geological logging of soil and rock chip
samples was completed on a visual basis
with parameters which include:
-
Colour
Grain size
Llithology type
Weathering
Mineralogy.
The total length and percentage of the
relevant intersections logged.
Subsampling
techniques
If core, whether cut or sawn and whether
quarter, half or all core taken.
If non-core, whether riffled, tube sampled,
No drilling completed.
Geostats and/or OREAS brand QA/QC
certified reference samples, blanks and
Page | 8
Criteria
and sample
preparation
JORC Code explanation
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.
Commentary
field duplicates were routinely inserted at
a rate of 1 in 15 with every batch
submitted for assay.
The sample size is appropriate for the
mineralization style, application and
analytical techniques used.
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.
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.
LIBS: A Sci-Aps Z-903 field portable LIBS
analyser was used for testing of pegmatite
samples and spodumene crystals evident
in hand specimens.
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.
Soils: ALS’s trace-level exploration
analytical technique AuME-TL43 is a
partial digestion in aqua regia of a 25g
sample of the pulverised soil sample (this
compares to 0.25g in most other
techniques). The technique is considered
a partial digest, but fully acceptable and
repeatable for oxidised surface soil
samples.
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.
Rocks: standard 30g fire assay and 4-acid
digest multi-element techniques are
industry norms for rock chip samples.
These are considered total digestion.
The assay techniques employed, the
detection limits offered and the QA/QC
procedures in place are considered fully
appropriate for the soil and rock sampling
reported.
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.
Assays are as reported from the
laboratory and stored in the company
database, managed by an independent
database consultant.
Field data was collected on site either on
a company Toughbook (laptop computer)
or on field sample books and later
uploaded to the database.
No adjustment has been made to the
Page | 9
Criteria
JORC Code explanation
Commentary
assay data as reported by the laboratory.
LIBS data displayed as Li (ppm) was
converted to Li2O% using a conversion
factor of 2.153 (i.e., Li2O% = Li (ppm) x
2.153
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.
Soil and rock sample positions were
located using a handheld GPS system with
an accuracy of +/- 5m and stored in the
company database. All coordinates are
referenced to MGA Zone 50, Datum
GDA94.
Quality and adequacy of topographic
control.
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.
Soil sampling was undertaken on a GPScontrolled grid (nominally 100m line
spacing x 50m sample spacing).
Rock samples were collected where rock
was exposed at surface.
Whether sample compositing has been
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.
Sample
security
The measures taken to ensure sample
security.
Each sample was placed into a prenumbered calico bag (soils and rocks), and
securely tied off and placed into a larger
“polyweave” bag for dispatch to the lab.
Samples were transported to the
laboratory by company personnel.
Audits or
reviews
The results of any audits or reviews of
sampling techniques and data.
Continuous improvement, internal
reviews of sampling techniques and
procedures are ongoing. No external
audits have been performed on the
methodology to date.
No sampling bias is known.
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.
Page | 10
JORC Code 2012 Edition Table 1:
Section 2 - Reporting of Exploration Reports
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 tenure hosting the Badja Project and
the location of the spodumene sample
reported in this news release is owned
100% by EMU NL (or its subsidiary
companies Coruscant Minerals Pty Ltd,
Emu Resources Pty Ltd & Emu
Exploration Pty Ltd ):
The project comprises a total of ten
granted tenements (see listing below):
M59/739 Coruscant Minerals
E59/2315 Coruscant Minerals
P59/2071 Emu Exploration
P59/2072 Emu Exploration
P59/2073 Emu Exploration
P59/2074 Emu Exploration
P59/2068 Emu Exploration
E59/2495 Emu Exploration
E59/2817 Emu Resources
E59/2836 Emu Resources
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.
All works undertaken and reported in
this ASX announcement were completed
within these tenements.
The project tenements are all in good
standing.
Exploration
done by other
parties
Acknowledgment and appraisal of
exploration by other parties.
Historical prospecting, sampling and
drilling activities have been undertaken
in different areas within the project
tenements intermittently by multiple
third parties over a period of at least 30
years.
Geology
Deposit type, geological setting and style
of mineralisation.
The project lies within an attenuated
portion of the Yalgoo-Singleton
greenstone belt bound by the Badja and
Walgardy intrusive granitoid batholiths
of the Youanmi Terrane. The Gnows
Nest and Monte Cristo prospects
comprise the areas where Emu NL have
reported Mineral Reserve Estimates
(MRE) within lode-hosted orogenic gold
deposits, similar to many of the gold
occurrences in the Yalgoo region, and
within the WA Yilgarn Craton. The areas
of interest described in this
announcement pertain to pegmatite
occurrences located on the western
granite/greenstone intrusive contact.
Page | 11
Criteria
JORC Code explanation
Commentary
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 drilling undertaken in the work
undertaken for this announcement.
o easting and northing of the drill hole
collar
o elevation or RL (Reduced Level –
elevation above sea level in metres)
of the drill hole collar
o dip and azimuth of the hole
o down hole length and interception
depth
o hole length.
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.
Not applicable.
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.
The assumptions used for any reporting
of metal equivalent values should be
clearly stated.
Relationship
between
mineralisation
widths and
intercept
lengths
These relationships are particularly
important in the reporting of Exploration
Results.
Not applicable.
If the geometry of the mineralisation
with respect to the drill hole angle is
known, its nature should be reported.
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’).
Diagrams
Appropriate maps and sections (with
Refer to maps and figures in body of the
Page | 12
Criteria
JORC Code explanation
Commentary
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.
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.
announcement.
Geological interpretations are based on
current knowledge and will change with
further exploration.
Key findings and location information
has been reported in body of text. Assays
are being awaited.
Reporting is considered balanced.
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.
Geological interpretations have been
taken from published maps, geophysical
interpretation, historical and ongoing
exploration.
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 field programmes and follow-up
work will be assessed pending laboratory
analytical results.
Diagrams clearly highlighting the areas
of possible extensions, including the main
geological interpretations and future
drilling areas, provided this information is
not commercially sensitive.
- END -
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