Pilgangoora Lithium Hot Spot JORC Table 1
Released
Released
Announcement PDF
15 January 2016
ADDENDUM TO ASX ANNOUNCEMENT OF 14 JAN 2016
(Inclusion of JORC Table 1)
Significant potential for lithium micas at
WA’s Pilgangoora “lithium hot spot”
Areas prospective for lithium “micas” identified at Pilgangoora in addition to Pilbara Minerals Limited
(ASX:PLS) existing spodumene-bearing pegmatite resource
Major mica style anomaly discovered just to northwest and separate to PLS’ pegmatite zones
Discovery of a major target for further evaluation
New results follow Lithium Australia’s high resolution soil geochemical survey over project area under
MOU with Pilgangoora owner, Pilbara Minerals
Potential for lithium micas sees Lithium Australia and Pilbara Minerals renegotiating MOU terms aimed
at expanding current evaluation work
New work has confirmed the significant potential for lithium “mica” styles to be added to Western Australia’s
emerging Pilgangoora lithium district, south of Port Hedland and where lithium resources based around spodumenebearing pegmatite mineralisation have already been proven. The new work has been undertaken by Lithium
Australia Limited (ASX: “LIT”) under the Company’s 2014 Memorandum of Understanding (MOU) with Pilgangoora
owner, ASX-listed Pilbara Minerals (ASX: “PLS”). It is a further boost for both developers in what they regard as
Western Australia’s rapidly developing “lithium hot spot”. Pilgangoora and its surrounding area already host Pilbara
Minerals’ world-class spodumene resource (PLS ASX announcement 13 October 2015) and has attracted a number
of other like participants, including Altura Mining Limited (ASX: “AJM”), Metalicity Limited (ASX: “MCT”) and Dakota
Minerals Limited (ASX: “DKO”) as shown diagrammatically in Figure 1.
Figure 1. The Pilgangoora lithium hotspot is now host to a number of ASX-listed lithium explorers
and substantial lithium resources. Lithium Australia is evaluating lithium mica mineralisation
within the area subject of Pilbara Resources’ recently announced JORC Resources.
Background
Lithium Australia’s application of disruptive technology to the recovery of lithium from micas led to a MoU
with PLS to examine the commercial potential of lithium micas on PLS’ Pilgangoora project (ASX
announcements, 26 November 2014 and 19 June 2015).
As part of the evaluation, Lithium Australia undertook a high resolution soil geochemical survey targeting
the pathfinder elements indicative of lithium micas or their derivatives, being present in the soil profile. A
positive response is a high probability indicator of a nearby primary source of lithium mica. The data and
interpretation generated from the survey is shown in Figure 2.
Principal survey outcomes
The geochemical techniques employed across Pilgangoora were successfully pioneered on other lithium
mica projects within Lithium Australia’s project portfolio. The techniques use pathfinder elements as a
proxy for lithium, primarily lithium derived from micas. In addition to field generated results, control
samples were assayed for lithium to verify the veracity of the interpretation. The following observations
have been made:
1.
2.
3.
4.
5.
The elements used show an extremely strong correlation with lithium hosted by the pegmatite
swarm, the subject of PLS’ current drilling and resource evaluation;
Lithium micas were observed in PLS’ drill chips, and are associated with the known spodumene
mineralisation, albeit generally in low abundance;
The soil profile around the spodumene pegmatite swarms contains abundant lithium mica
indicators;
A significant geochemical anomaly has been defined in the northwest of the project area, with a
chemical signature typical of lithium micas, and separate to the spodumene-bearing lithium
mineralisation;
The survey identified further prospective spodumene targets at Pilgangoora, providing upside for
PLS.
Geochemical survey details
Lithium Australia’s detailed geochemical survey covered 70 km of traverse lines with samples taken on a
50mx200m grid. Samples were analysed using a Niton field-portable XRF with a number of samples
submitted to commercial laboratories for checks, calibration and lithium analysis (lithium cannot be
detected by field-portable XRF).
Along the main pegmatite swarm (Figure 2) which is the focus of PLS’ spodumene drilling and target of an
updated resource statement (PLS ASX announcement 11 January 2016) all show a strong response. In the
northwest of the Pilgangoora ground, there is a unique high response which is more indicative of lithium
micas than the more generalised geochemical response over the main pegmatite zone. This is a major
target for further evaluation.
In general, these occurrences are close to the lithium pegmatites and have resulted from weathering and
dispersion in the soil profile. The mineralogy and extent of these deposits will be the focus of some of
Lithium Australia’s future work in the area.
Figure 2 shows the outcropping pegmatites (blue) and their relationship with lithium mica geochemical
pathfinders. The very large anomaly in the northwest is interpreted as a concealed greisenised granite, the
geochemical signature of which separates it from the main pegmatite swarm.
Future objectives
Under the terms of the MoU between PLS and LIT, LIT was to provide PLS with a commercial development
proposal by 30 December 2015. The parties recognise the very high potential now for lithium micas in the
Pilgangoora area and are renegotiating the terms of the MoU to expand the evaluation for this potential
additional lithium source.
Lithium Australia Managing Director, Mr Adrian Griffin:
“The Pilgangoora lithium district has become a very interesting place for LIT. We have discovered lithium in
clays, and very large geochemical anomalies consistent with lithium mica mineralisation. Together with the
lithium micas contained within the pegmatites, the circumstances are very favourable for further positive
outcomes. Subject to our current MOU negotiations, we will progress our Pilgangoora mica work to ensure
every value add opportunity is seized upon.”
“The latest results also add to a very strong development and market period for Lithium Australia where the
Company closed 2015 on a high, having achieved significant increases in both market capitalisation and
share price for the year (LIT was the 7th best performing stock on the ASX, a return to shareholders of 292%)
despite the devastated junior mining sector.”
“We have this week announced a successful A$6.55 million capital raising (ASX release, 11 January 2016) on
the back of the previously announced contributing share issue (ASX release, 7 January 2016) and are
potentially well financed for the next two years.”
“These financial gains parallel our project gains which now see Lithium Australia involved in unique lithium
mica developments in Australia, Mexico and Europe.”
Adrian Griffin
Managing Director
Mobile +61 (0) 418 927 658
Adrian.Griffin@lithium-au.com
About Lithium Australia NL:
LIT is a dedicated developer of disruptive lithium extraction technologies. LIT has strategic alliances with a
number of companies, potentially providing access to a diversified lithium mineral inventory on three
continents.
MEDIA CONTACT:
Adrian Griffin Lithium Australia NL
Kevin Skinner Field Public Relations
08 6145 0288 | 0418 927 658
08 8234 9555 | 0414 822 631
COMPETENT PERSONS STATEMENT
Competent Persons Statement:
The information contained in the report that relates to Exploration Results of projects owned by Lithium Australia NL
and is based on information compiled or reviewed by Mr. Adrian Griffin, who is an employee of the Company and is a
Member of the Australasian Institute of Mining and Metallurgy and has sufficient experience which is relevant to the
style of mineralisation and type of deposit under consideration and to the activity which is being undertaken to qualify
as a Competent Person as defined in the 2004 Edition of the ‘Australasian Code for Reporting of Exploration Results,
Mineral Resources and Ore Reserves’. Mr. Griffin has given consent to the inclusion in the report of the matters based on
his information in the form and context in which it appears.
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.
Lithium Australia NL (LIT) has completed a 1320 sample
geochemical survey program over 70km of traverse lines.
Results being reported are for 1320 samples over tenement
E45/2232.See Figure 2 (above).
Include reference to measures taken to ensure sample
representivity and the appropriate calibration of any measurement
tools or systems used.
LIT’s detailed geochemical survey covered 70 km of traverse
lines with samples taken on a 50mx200m grid. The first 630
sample readings were taken in-field while the remaining 690
samples were sieved, bagged and analysed in Perth.
Samples were analysed using a Niton field-portable XRF. At
each sample site a 100-150mm deep pit was dug. For the
first 630 samples a single reading was taken from the fresh
surface on the bottom of each pit and for the remaining 690
samples a reading was taken from the bagged, sieved soil
coming from the bottom of each pit. Two reference type
materials (standards) were used after every twentieth sample
in order to ensure quality control.
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 1320 samples were all geochemical "soil" samples
analysed using a Niton field-portable XRF for a suite of 33
elements.36 samples were submitted to NAGROM
laboratories (Perth) for checks, calibration and lithium
analysis.
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).
Not applicable
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.
Not applicable
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.
Not applicable
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.
Not applicable
Whether logging is qualitative or quantitative in nature. Core (or
costean, channel, etc) photography.
Not applicable
The total length and percentage of the relevant intersections
logged.
Not applicable
If core, whether cut or sawn and whether quarter, half or all core
taken.
Not applicable
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.
At each sample site a 100-150mm deep pit was dug. For the
first 630 samples a single reading was taken from the fresh
surface on the bottom of each pit and for the remaining 690
samples a reading was taken from the bagged, sieved soil
coming from the bottom of each pit.
Logging
Sub-sampling
techniques and
sample
preparation
Quality of assay
data and
laboratory tests
Quality control procedures adopted for all sub-sampling stages to
maximise representivity of samples.
For the Niton based geochemical survey two reference type
materials (standards) were used after every twentieth sample
in order to ensure quality control. For the 36 samples sent to
NAGROM, laboratory standards, splits and repeats were
used for quality control.
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.
Not applicable
Whether sample sizes are appropriate to the grain size of the
material being sampled.
Sampling sizes are considered to be appropriate
The nature, quality and appropriateness of the assaying and
laboratory procedures used and whether the technique is
considered partial or total.
The quality of the data from samples analysed by using fieldportable Niton XRF analyser is considered appropriate due to
consistent and accurate results from reference materials. 36
control samples were sent to NAGROM Pty Ltd's laboratory
in Perth where laboratory standards, splits and repeats were
used.
A field-portable Niton XL3t XRF analyser was used for the
geochemical survey. Each reading consisted of a 45 second
interval reading on the soil-type setting. The 45 second
interval consisted of a 15 second main range, 15 second low
range and 15 second high range. The instrument was
serviced 26th of August 2015 and a system check was done
every time the instrument was switched on or after a battery
change.
The quality of the data from samples analysed by using fieldportable Niton XRF analyser is considered appropriate due to
consistent and accurate results from reference materials. 36
control samples were sent to NAGROM Pty Ltd's laboratory
in Perth where laboratory standards, splits and repeats were
used.
Not applicable
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.
Verification of
sampling and
assaying
The verification of significant intersections by either independent
or alternative company personnel.
Location of data
points
Data spacing
and distribution
Orientation of
data in relation
to geological
structure
The use of twinned holes.
Not applicable
Documentation of primary data, data entry procedures, data
verification, data storage (physical and electronic) protocols.
Spatial data and XRF data were imported from GPS and
Niton XRF analyser respectively and stored into a single
Excel datasheet. Two types of standards (reference
materials) were used after every 20th sample. Field standard
locations were used to verify the locations of sample points.
These locations were also verified through a GIS verification.
Discuss any adjustment to assay data.
Not applicable
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.
Locations were marked by using a Garmin GPSmap 62s
GPS. Approximately 5-10m accuracy.
Specification of the grid system used.
The Grid used was MGA (GDA94, Zone 50)
Quality and adequacy of topographic control.
Not applicable
Data spacing for reporting of Exploration Results.
70 km of traverse lines with samples taken on a 50mx200m
grid. 50m intervals E-W with a 200m line spacing N-S.
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.
Not applicable
Whether sample compositing has been applied.
Not applicable
Whether the orientation of sampling achieves unbiased sampling
of possible structures and the extent to which this is known,
considering the deposit type.
Geological strike is N-S. The N-S line spacing is 200m and
the E-W sample spacing is 50m adequately establishing
geochemical continuity.
Sample security
Audits or
reviews
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.
Not applicable
The measures taken to ensure sample security.
All in-field XRF analyses were done by LIT's field geologist
and all other samples were transported to and analysed in
Perth by the same field geologist.
The results of any audits or reviews of sampling techniques and
data.
The locations and XRF data have been reviewed by crossverification of all the data in the digital excel datafile against
GIS locations, reference material and raw data.
Section 2 Reporting of Exploration Results
(Criteria listed in the preceding section also apply to this section.)
Criteria
Mineral
tenement and
land tenure
status
Exploration
done by other
parties
JORC Code explanation
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.
Commentary
LIT has an MoU with Pilbara Minerals Limited (PLS), which
owns 100% of the exploration tenement E45/2232. LIT is
currently renegotiating the terms of the MoU to expand the
evaluation for this potential additional lithium source.
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
Acknowledgment and appraisal of exploration by other parties.
Talison completed RC holes in 2008. GAM completed RC
holes between 2010 and 2012. PLS RC drilling in 2015.
Deposit type, geological setting and style of mineralisation.
The Pilgangoora pegmatites are part of the later stages of
intrusion of Archaean granitic batholiths into Archaean
metagabbros and metavolcanics. Lithium mineralisation
occurs as spodumene in zoned pegmatites that have
intruded a sheared metagabbro.
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, includingeasting 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 and
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.
Not applicable
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.
Not applicable
The assumptions used for any reporting of metal equivalent
values should be clearly stated.
Not applicable
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.
Not applicable
Geology
Relationship
between
mineralisation
widths and
intercept lengths
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’).
Not applicable
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.
See figure 2.
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.
Not applicable
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.
All meaningful & material exploration data has been reported.
Further work
The nature and scale of planned further work (eg tests for lateral
extensions or depth extensions or large-scale step-out drilling).
Under the terms of the MoU between PLS and LIT, LIT was
to provide PLS with a commercial development proposal by
30 December 2015. The parties recognise the very high
potential now for lithium micas in the Pilgangoora area and
are renegotiating the terms of the MoU to expand the
evaluation for this potential additional lithium source.
Diagrams clearly highlighting the areas of possible extensions,
including the main geological interpretations and future drilling
areas, provided this information is not commercially sensitive.
Not applicable
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