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CORE LITHIUM LTD Regulatory Filings 2017

Sep 27, 2017

64737_rns_2017-09-27_9fe17bbd-d038-4df2-b422-0810bee651c8.pdf

Regulatory Filings

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ASX ANNOUNCEMENT

ASX: CXO

28[th] September 2017

Lithium Potential of the Barrow Creek Project Confirmed

HIGHLIGHTS

  • Rockchip and soil sampling programmes completed at Core’s Barrow Creek Project in the NT confirm the pegmatite field to be highly prospective for LCT type lithium mineralisation

  • Core holds 2,500km[2] of recently granted tenements in the Barrow Creek and Anningie Pegmatite Fields

  • Barrow Creek has a long history of tin and tantalum production, similar to Core’s Finniss Lithium Project (and Greenbushes)

  • Core’s soil sampling suggest a substantially larger footprint of lithium anomalism than depicted by historic pegmatite workings

  • 13 potential pegmatite targets identified to date at Barrow Creek

  • 3 targets rank as high priority for follow up drilling based on surface geochemistry and mapped scale

  • Newly-defined Tesla lithium soil anomaly has 5 km of strike potential for pegmatites

  • Barrow Creek is close to rail connection that links direct to Darwin Port

  • Expands potential for Darwin to become long-term, central processing and transport hub for NT spodumene production for Core

Core Exploration Ltd (ASX: CXO) (“Core” or the “Company”) is pleased to announce that it has received all outstanding assays relating to soil and rockchip sampling at the Barrow Creek Lithium Project in the Northern Territory. Regional-spaced soil samples (over 2,000 samples collected) indicate a substantially larger footprint of lithium anomalism than depicted by historic pegmatite workings.

A 26 Gray Court, Adelaide SA 5000 | T (08) 7324 2987 | E [email protected] www.coreexploration.com.au

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Core’s baseline exploration highlighted a new large prospect area called Tesla, where elevated lithium in soils form a 5 km long arcuate trend highlighting previously unmapped pegmatites.

At the Ringing Rocks Prospect a distinct lithium-in-soils anomaly is coincident with the outcrop position of two large pegmatite bodies, with surface expressions measuring 700m x 220m and 360m x 150m that may represent a single pegmatite body of approximately 1200m x 300m with surface rock chips assaying up to 0.6% Li2O.

On a local scale, rockchips and detailed mapping have confirmed the lithium potential of a number of historic prospects, including Jump Up, Ballace’s Claim 1 & 2, Tabby Cat, Hugo Jack’s, Boyce’s Corner, Johannson’s, Jody’s, Slippery and Krakatoa.

Many other pegmatite occurrences were identified and investigated during the conduct of regional reconnaissance work.

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Figure 1. Main prospects within Core’s EL31058, Barrow Creek Pegmatite Field, NT. Gridded Lithium

in soils base.

A 26 Gray Court, Adelaide SA 5000 | T (08) 7324 2987 | E [email protected] www.coreexploration.com.au

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Ringing Rocks Prospect

Ringing Rocks is characterised by significant coincident Li-Cs-Sn-Rb anomalism and moderate coincident Li-Ta-W anomalism in pegmatite rockchips and soil geochemistry (Figure 2). A distinct lithium-in-soils anomaly is coincident with the outcrop position of two large pegmatite bodies, with surface expressions measuring 700m x 220m and 360m x 150m. These can be interpolated under cover to be a single body of approximately 1200m x 300m (orange dashed line in Figure 2).

Peak rock chip results include 0.6% and 0.2% Li2O, while the average content is 151 ppm Li (or 324 ppm Li2O). This grade at surface is consistent with surface-weathered material observed by Core at the Finniss Project prior to discovery of the high grade Grants, BP33 and Far West lithium deposits with drilling. This result is a strong indication of lithium anomalism associated with the large pegmatite body.

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Figure 2. Ringing Rocks Prospect, showing mapped pegmatite and contoured Li in soils results.

A 26 Gray Court, Adelaide SA 5000 | T (08) 7324 2987 | E [email protected] www.coreexploration.com.au

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Tesla Prospect

Tesla is defined by a large (5km long, 1km wide), crescent shaped ENE to N trending Li-CsW-Sn-Rb (+Au-Ag-As-Cu-Pb) multi-element soil anomaly (Figure 1 and Figure 3). In particular, peak Li anomalism and coincident Cs-Sn-Rb anomalism defines a number of high priority target areas.

The largest of these targets is approximately 800m east of the Johannsons prospect, where pegmatite rock chips contain up to 362 ppm Li. The Tesla anomaly lies within or adjacent to the regional contact aureole of a large granite body. Early mapping shows that there is a pegmatite dyke swarm in the area.

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Figure 3. Tesla Prospect area on gridded Li in soils results. Note that sample density varies throughout area and influences the Li grid image.

A 26 Gray Court, Adelaide SA 5000 | T (08) 7324 2987 | E [email protected] www.coreexploration.com.au

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Jump Up Prospect

A highly weathered NW-to NNW striking 500m-wide swarm of pegmatite dykes at the Jump Up prospect is anomalous in lithium with a maximum Li rock chip content of 312 ppm (Figure 4). Anomalous lithium in pegmatite rock chips is also coincident with a high lithium soil anomaly. Coincident multi-element anomalism includes good correlation of Li with Sn, Cs and Rb anomalism. This prospect has been worked historically for Sn and Ta, and the pegmatites disappear under cover in all directions.

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Figure 4. Jump-up Prospect area on gridded Li in soils results.

A 26 Gray Court, Adelaide SA 5000 | T (08) 7324 2987 | E [email protected] www.coreexploration.com.au

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Soil Surveys and Reconnaissance Mapping, EL 31058 Barrow Creek

Regional and prospect scale exploration over EL 31058 has included 2,342 soil samples, 404 rock chip samples and prospect mapping by Core’s geologists. The Company has focussed its mapping and rock chip sampling efforts on historic pegmatite workings within the Barrow Creek Tin-Tantalum-Tungsten Field, but soil samples were collected over a much broader portion of the Project area (Figure 1).

Historical pegmatite prospects and mine areas considered prospective for Lithium-CaesiumTantalum (L-C-T) Type pegmatite were geologically appraised and mapped, then sampled to determine representative whole rock geochemistry.

The main prospects targeted were Ringing Rocks, Jump Up, Ballace’s Claim 1 & 2, Tabby Cat, Hugo Jack’s, Boyce’s Corner, Johannson’s, Jody’s, Slippery and Krakatoa (Figure 1). Many other pegmatite occurrences were also opportunistically investigated during the course of regional soil sampling.

Pegmatite from many of these prospects appear to be highly weathered, and it is likely that the pegmatites may be more widespread than currently revealed, under thin cover.

Soil sample grids generally utilised 200m x 400m or 400m x 400m spacing to establish regional coverage. Two historical prospects (Tabby Cat and Jump Up) were subject to more detailed 50m x 100m spaced grids (Figure 1).

Analysis of assay results from the current program suggests coincident soil/rockchip lithium anomalism and pathfinder element associations (Cs-Ta-W-Sn-Rb) at a number of prospects. Combined with mapping data, Core has prioritised the targets.

The most notable are Ringing Rocks, Jump Up and the newly discovered Tesla Prospects.

Background

As with Greenbushes in WA and Core’s Finniss Project in the Bynoe Pegmatite Field in the NT, the Barrow Creek Pegmatite Field has also had a long history of tin and tantalum mining prior to lithium mineralisation being recognised.

Core’s Anningie and Barrow Creek Lithium Projects encompass five Exploration Licences covering over 2,500 square kilometres in and around the Anningie and Barrow Creek Tin Tantalum Pegmatite fields in the north Arunta Region of the NT, which are considered highly prospective for lithium (Figure 6).

Core believes there is an excellent fit between the lithium potential of Barrow Creek Pegmatite Field, direct rail link to Darwin Port and Core’s objectives to make Darwin and Core’s Finniss Lithium Project near Darwin a central processing and global transport hub for

A 26 Gray Court, Adelaide SA 5000 | T (08) 7324 2987 | E [email protected] www.coreexploration.com.au

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NT lithium and spodumene production as forecast lithium demand keeps growing (Figure 5 and Figure 6).

Next Steps

Core has the opportunity to commence drilling at the Barrow Creek Project in FebruaryMarch 2018 once the current field season is completed at the Finniss Lithium Project.

With this in mind, Core has initiated a heritage clearance with the Aboriginal Areas Protection Authority (AAPA) to enable ground disturbing works at a number of the key prospects. Core would then expect to undertake RAB and RC drilling to test the highest priority targets, as outlined above.

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Figure 5. Tin-tantalum pegmatite provinces of the Northern Territory (from NTGS Report 16 – 2004).

A 26 Gray Court, Adelaide SA 5000 | T (08) 7324 2987 | E [email protected] www.coreexploration.com.au

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Figure 6. Core’s tenements within the Anningie and Barrow Creek Pegmatite Fields, NT.

For further information please contact:

Stephen Biggins Managing Director Core Exploration Ltd 08 7324 2987 [email protected]

The information in this report that relates to Exploration Results and Mineral Resources is based on information compiled by Stephen Biggins (BSc(Hons)Geol, MBA) as Managing Director of Core Exploration Ltd who is a member of the Australasian Institute of Mining and Metallurgy and is bound by and follows the Institute’s codes and recommended practices. He has sufficient experience which is relevant to the styles of mineralisation and types of deposits under consideration and to the activities being 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. Biggins consents to the inclusion in the report of the matters based on his information in the form and context in which it appears.

A 26 Gray Court, Adelaide SA 5000 | T (08) 7324 2987 | E [email protected] www.coreexploration.com.au

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JORC Code, 2012 Edition – Table 1 report template

Section 1 Sampling Techniques and Data

(Criteria in this section apply to all succeeding sections.)

Criteria JORC Code explanation Commentary
Sampling Nature and quality of sampling (eg cut channels, random chips, or Soilsamples were collected on grids on a regional basis via
techniques specific specialised industry standard measurement tools appropriate
to the minerals under investigation, such as down hole gamma
sondes, or handheld XRF instruments, etc). These examples should
not be taken as limiting the broad meaning of sampling.
Include reference to measures taken to ensure sample representivity
and the appropriate calibration of any measurement tools or systems
used.
Aspects of the determination of mineralisation that are Material to the
Public Report.
In cases where ‘industry standard’ work has been done this would be
relatively simple (eg ‘reverse circulation drilling was used to obtain 1
m samples from which 3 kg was pulverised to produce a 30 g charge
for fire assay’). In other cases more explanation may be required,
such as where there is coarse gold that has inherent sampling
problems. Unusual commodities or mineralisation types (eg
submarine nodules) may warrant disclosure of detailed information.
the digging of a hole to >30 cm to retrieve B horizon soil (or A
horizon in the absence of B). This was sieved on site to -5mm
and put into a kraft pack weighing approx. 150 g.
Sample locations were determined with a hand held GPS,
coordinates and geological descriptions were noted for each sample.
Samples were collected during two campaigns, in May-June 2017
and August 2017. Data has been gridded collectively for various
elements.
Rockchipsampling was undertaken as part of reconnaissance
mapping and prospecting of established pegmatite prospects and
historic workings/mines in CXO’s tenure. Samples were taken from
pegmatitic lithologies suspected of comprising either fresh
lepidolite/amblygonite or weathered spodumene. Some samples were
collected from waste dumps or loose materials emanating from
historic workings and costeans. Some in situ material was also
sampled.
Rockchip samples were collected throughout the project area on an
ad hoc basis, but were designed to be representative of the variety of
rocktypes present in any given area or prospect. They were large
enough to be representative of the coarse pegmatite lithology,
generally in the range 3-6 kg.
Drilling Drill type (eg core, reverse circulation, open-hole hammer, rotary air Drilling not used.
techniques 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). _

A 26 Gray Court, Adelaide SA 5000 | T (08) 7324 2987 | E [email protected]

www.coreexploration.com.au

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Criteria JORC Code explanation Commentary
Drill sample Method of recording and assessing core and chip sample recoveries Drilling not used.
recovery 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 Standard sample logging procedures are utilised by the company,
geotechnically logged to a level of detail to support appropriate including logging codes for lithology, minerals, weathering etc.
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 andpercentage of the relevant intersections logged.
Sub- If core, whether cut or sawn and whether quarter, half or all core Soilsamples are approx. 150 g in size and orientation programs have
sampling
techniques
and sample
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
determined that the size, seive size fraction and depth collected are
sufficient to discern trends for regional assessment purposes.
Duplicates were collected at roughly 1 in 20 sites to monitor sampling
variability. No discernable variations have been noted in the data.
preparation sample preparation technique. Replicates of soil samples are also collected on a 1 in 20 basis to
Quality control procedures adopted for all sub-sampling stages to determine local variability and to modify grid size if needed.
maximise representivity of samples. Replicates are behaving in a manner that is expected for the
Measures taken to ensure that the sampling is representative of the in
geochemical system present.
situ material collected, including for instance results for field No other quality control procedures were considered necessary for
duplicate/second-half sampling. this reconnaissance style sampling program, in respect of both soils
Whether sample sizes are appropriate to the grain size of the material
and rocks.
being sampled.
Quality of The nature, quality and appropriateness of the assaying and Rocksamples were prepared by coarse crushing to obtain a
assay data
and
laboratory
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

homogeneous crushed mass for the whole sample (two stage, -6mm
followed by -2 mm). This is sub-sampled to <1 kg via a splitter at the
laboratory.
The sub-sample is pulverised in LM5 mill to >85% passing 75 um.
make and model, reading times, calibrations factors applied and their Soilsamples are simply pulverised in LM5 to 85%passing75 um.

A 26 Gray Court, Adelaide SA 5000 | T (08) 7324 2987 | E [email protected]

www.coreexploration.com.au

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Criteria JORC Code explanation Commentary
tests derivation, etc. After sample preparation, soil and rock sample pulps were then
Nature of quality control procedures adopted (eg standards, blanks, analysed via 4A/MS 4 Acid Digest ICP-MS: and 4A/OE 4 Acid Digest
duplicates, external laboratory checks) and whether acceptable levels
ICP-OES for a broad element suite including Li. The ALS method is
of accuracy (ie lack of bias) and precision have been established. ME-MS61, comprising a standard suite of 48 elements. The lower
and upper detection range for Li by this method are 0.2 ppm and
10,000 ppm respectively.
Other elements beyond Li that are routinely analysed are: Cs, Rb, Sr,
Nb, Sn, Ta, Bi, Mo, U, Sb and As.
Goldwas analysed in soils and rock chips.
The ALS method for gold is 30 g fire assays, code AU-ICP21.
ALS utilised standard internal quality control measures including the
use of Certified Lithium Standards and duplicates.
Repeats of gold analysis were run on anomalous samples at the
laboratory routinely, given the low level of detection required.
CXO-implemented quality control procedures are outlined above and
include duplicates and replicates.
Verification The verification of significant intersections by either independent or Core’s experienced project geologists are supervised by Core’s
of sampling
and
assaying
alternative company personnel.
The use of twinned holes.
Documentation of primary data, data entry procedures, data
verification, data storage (physical and electronic) protocols.
Exploration Manager.
All field data is manually collected, entered into excel spreadsheets
and validated.
Hard copies are stored in the local office and electronic data is stored
Discuss any adjustment to assay data. on the Core server.
Forsoils, the Sample ID, location (east/north), position (in situ vs
transported), rocktype and detailed description were entered into a
spreadsheet. Additional information to the above is collected,
including depth collected, soil colour and soil type.
Metallic Lithium percent was multiplied by a conversion factor of
2.15283 to report Li2O%
Location of Accuracy and quality of surveys used to locate drill holes (collar and All coordinate information was collected using hand held GPS utilizing
data points down-hole surveys), trenches, mine workings and other locations
used in Mineral Resource estimation.
GDA 94, Zone 53.
Specification of thegrid system used.

A 26 Gray Court, Adelaide SA 5000 | T (08) 7324 2987 | E [email protected]

www.coreexploration.com.au

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Criteria JORC Code explanation Commentary
Quality and adequacy of topographic control.
Data Data spacing for reporting of Exploration Results. Soil samples collected on regular grids, ranging from 400x200m to
spacing and
distribution
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
100x50m. Several programs of infill took place where anomalous
results could be followed up.
classifications applied.
Whether sample compositing has been applied.
Orientation Whether the orientation of sampling achieves unbiased sampling of The short axis of soil sampling grids is typically oriented
of data in possible structures and the extent to which this is known, considering perpendicular to the interpreted strike of mineralisation as mapped or
relation to
geological
the deposit type.
If the relationship between the drilling orientation and the orientation
of key mineralised structures is considered to have introduced a
predicted by the geological model.
structure sampling bias, this should be assessed and reported if material.
Sample The measures taken to ensure sample security. Company geologist supervises all sampling and subsequent storage
security in field.
Audits or The results of any audits or reviews of sampling techniques and data.
There have not been any audits.
reviews

Section 2 Reporting of Exploration Results

(Criteria listed in the preceding section also apply to this section.)

Criteria JORC Code explanation Commentary
Mineral Type, reference name/number, location and ownership including Soilsamples were collected in EL31058.
tenement agreements or material issues with third parties such as joint EL31058 is currently held by Lithium Developments Pty Ltd, a fully
and land
tenure
ventures, partnerships, overriding royalties, native title interests,
historical sites, wilderness or national park and environmental
settings.
owned subsidiary of Core Exploration. The tenement lies on two
pastoral properties, Neutral Junction and Stirling. Core is the
nominated Operator in respect of the NT Government.
status The security of the tenure held at the time of reporting along with any There are no registered heritage sites covering the areas sampled.
known impediments to obtaining a licence to operate in the area.

A 26 Gray Court, Adelaide SA 5000 | T (08) 7324 2987 | E [email protected]

www.coreexploration.com.au

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Criteria JORC Code explanation Commentary
CXO has four other exploration tenements in the project: ELs
31139 and 31140 in the Anningie and ELs 31145 and EL
31146 in the Barrow Creek Pegmatite Fields.
 CXO manages the tenure.
All tenements in the Anningie and Barrow Ck projects are in good
standing with the NT DME Titles Division.
Exploration Acknowledgment and appraisal of exploration by other parties. There has been multiple, sporadic but intensive periods of
done by
other parties
prospecting, exploration and small scale mining within the Barrow
Creek Project area since the 1940s. All known previous work has
focused on tungsten, tin and tantalum with no systematic assaying for
lithium.
All previous work has focussed on either alluvial/eluvial material or
the upper, weathered portion of the bedrock which would be suitable
for free digging. Depth of weathering is approximately 20m depth and
any spodumene would be totally altered to kaolinite with the lithium
completely depleted.
Historic exploration reports is currently been reviewed and results
summarised; however, CXO has not yet completed digital capture
and compilation of data collected by previous explorers and miners.
The NT geological Survey undertook a regional appraisal of the field,
which was published in 2004 (NTGS Report 16, Frater 2004).
Geology Deposit type, geological setting and style of mineralisation. The Project is located in the western part of the Proterozoic north
Arunta where it comprises a sequence of metamorphosed
greenstones and sediments. Multiple tin and tantalum-bearing
pegmatites have been emplaced into the sediments within the contact
aureole of the Barrow Creek Suite Granite a Paleoproterozoic
intrusion which is interpreted to be the source of the rare metals.
Dimensions of the pegmatites vary in scale from narrow fracture
fillings to massive bodies up to 30m wide and >200m long.
Drill hole A summary of all information material to the understanding of the No drilling undertaken.
exploration results including a tabulation of the following information

A 26 Gray Court, Adelaide SA 5000 | T (08) 7324 2987 | E [email protected]

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Criteria JORC Code explanation Commentary
Information for all Material drill holes:
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 In reporting Exploration Results, weighting averaging techniques, No data aggregation done.
aggregation
methods
maximum and/or minimum grade truncations (eg cutting of high
grades) and cut-off grades are usually Material and should be stated.
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
These relationships are particularly important in the reporting of
As the soil geochemical results reported here that were collected by
between Exploration Results. Core Exploration are from surface, any potential depths of
mineralisatio
n widths and

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
mineralisation or orientations can only be inferred from geological
observations on the surface and hence are speculative in nature.
intercept should be a clear statement to this effect (eg ‘down hole length, true
lengths width not known’).
Diagrams Appropriate maps and sections (with scales) and tabulations of See Report maps.
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 Where comprehensive reporting of all Exploration Results is not Core consider reporting herein to be balanced.

A 26 Gray Court, Adelaide SA 5000 | T (08) 7324 2987 | E [email protected]

www.coreexploration.com.au

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Criteria JORC Code explanation Commentary
reporting practicable, representative reporting of both low and high grades
and/or widths should be practiced to avoid misleading reporting of
Exploration Results.
Other Other exploration data, if meaningful and material, should be reported
See release details
substantive including (but not limited to): geological observations; geophysical
exploration
data
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.
Further work
The nature and scale of planned further work (eg tests for lateral
Core has commissioned an AAPA heritage clearance, which may
extensions or depth extensions or large-scale step-out drilling). take 3-4 months to complete.
Diagrams clearly highlighting the areas of possible extensions, Following this, Core will plan a drilling program and submit an Mine
including the main geological interpretations and future drilling areas, Management Plan application with the NT DPIR.
provided this information is not commercially sensitive. Drilling is expected to take place in Q1 or Q2 2018, weather
permitting.
Minor rock and soil sampling, mapping and reconnaissance may take
place in advance to assist in sighting drill holes.

A 26 Gray Court, Adelaide SA 5000 | T (08) 7324 2987 | E [email protected]

www.coreexploration.com.au