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6c41ee8a3bc3984c1d6702.pdf
1 October 2015 ASX: WSA
WESTERN AREAS COMPLETES THE ACQUISITION OF THE COSMOS NICKEL COMPLEX
JORC 2012 Resource Compliance Completed by Western Areas
Western Areas Ltd (ASX:WSA, 'Western Areas' or the 'Company'), through its 100% owned subsidiary Australian Nickel Investments Pty Ltd, is pleased to announce that it has completed the previously announced acquisition of the Cosmos Nickel Complex ('CNC') from Xstrata Nickel Australasia Operations Pty Ltd ('XNAO'), a subsidiary of Glencore plc.
The completion of the transaction follows satisfaction of the conditions precedent. Accordingly, Western Areas has paid its first instalment of A$11.5m in cash, from the total consideration of A$24.5m. Future payments are due on 1 July 2016 (A$7.0m) and 1 April 2017 (A$6.0m).
The Company has also completed a review of the acquired nickel resources in accordance with JORC 2012, confirming a total of 567,297 nickel tonnes to the CNC Total Mineral Resources (see Table 1), which is a significant addition to the Company's resource portfolio.
Previously Announced Acquisition Highlights:
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World class nickel belt which has yielded one of the highest grade nickel mines ever discovered and operated;
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Substantial exploration opportunities in areas which remain largely untested - 24 month program ready to commence on day one;
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Third potential underground mine with the undeveloped Odysseus high grade deposit hosting a total Mineral Resource of 7.3 million tonnes @ 2.4% nickel containing 174,000 tonnes of nickel;
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Extensive and well maintained operating infrastructure including a 450ktpa concentrator, a new SAG mill and large accommodation village to support an early start-up; and
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Consistent with Western Areas' core strengths - exploration, development, underground mining and conventional flotation utilising a well proven low cost operating model.
Western Areas will now commence the formal process of registering the transfer of the associated mining and exploration tenements with the Department of Mines and Petroleum.
Western Areas Managing Director, Mr Dan Lougher, commented that the completion of the CNC acquisition is an exciting milestone for the Company.
'The completion of this acquisition meets one of our strategic objectives of acquiring a brownfields growth project, in addition to growth opportunities identified at Forrestania. We firmly believe that the Cosmos Nickel Complex provides the Company with significant upside from both an exploration front and a very attractive potential new mining operation.'
'The Cosmos Nickel Complex area has significant infrastructure in place, was under explored by the previous owner and hosts one of the world's premier high grade nickel belts. The Odysseus deposit holds some high grade massive sulphide intersections of up to 12% nickel which we will be looking to expand upon in the future. '
'We are working very closely with our geophysical partner, NewExco, on the surface geophysics program, whilst our in-house mining and project team looks to advance Odysseus as a potential new underground mine in a staged and disciplined manner using our low cost operating model.'
'The operations team has already identified idle equipment, such as a new ventilation fan system and mine refuge chambers which can be transported to Forrestania and drive significant cost savings in excess of A$2m', said Mr Lougher.
Ventilation Fans Mine Refuge Chambers
Immediate Plans for CNC
Today, the Company's operations team has taken control of the CNC, located just outside Leinster. During the time up to completion, detailed planning for activities from day one were completed and are now being implemented. Some of these plans include, but are not limited to the following:
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Implementing safety and other site operational protocols in line with Western Areas standards;
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Engagement with local contractors to complete initial site improvements;
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Engagement with local heritage groups;
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Tenement wide surface geophysical program using the latest deep sensing technology for additional target generation for calendar year 2015;
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Integration, review and commencement of study work associated with the Odysseus Project; and
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Evaluating and driving equipment synergies.
Western Areas will also now commence the formal process of registering the transfer of the associated mining and exploration tenements with the Department of Mines and Petroleum.
JORC 2012 Resource Statement
Western Areas has completed a thorough review of the previously reported resources for CNC and can now report these resources under the Company's JORC 2012 Compliance procedures (see attachments). The Company's review was not designed to optimise the resource, as this will be one of the workstreams carried out over the next 12 months.
Nickel Mineralisation is in the form of ultramafic-hosted disseminated and massive sulphides. The Mineral Resource is categorised according to drill hole spacing and geological confidence and has been reported in accordance with the JORC Code (2012). A 1.5% nickel cut off grade was applied to all
deposits except for the large low-grade Mt Goode deposit where a 0.4% nickel cut off grade was applied. All resource estimates are based on 3D block models generated using Ordinary Kriging, after applying geostatistical analysis to domained data sets. Further details pertaining to the Mineral Resources can be found in the associated Table 1 documents provided at the end of this report.
The Resource Table for CNC is as follows:
We ste rn Are a s Cosmos Ore Mine ra l Re source Sta te me nt - Effe ctive da te 1 Octobe r 2015
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Deposit
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Tonnes
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Grade Ni%
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Ni Tns
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JORC Classification
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JORC Code
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Mineral Resources
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479,914
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2.6
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12,430
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Indicated Mineral Resource
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2012
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1.Cosmos Area
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AM5
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26,922
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1.9
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509
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Inferred Mineral Resource
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2012
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AM6
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1,704,548
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2.7
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45,171
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Indicated Mineral Resource
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2012
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329,443
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2.5
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8,203
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Inferred Mineral Resource
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2012
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Odysseus
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3,884,857
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2.2
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84,301
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Indicated Mineral Resource
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2012
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169,165
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2.1
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3,603
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Inferred Mineral Resource
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2012
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Odysseus North - Disseminated
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1,631,495
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2.8
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45,519
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Indicated Mineral Resource
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2012
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1,586,175
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2.2
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35,054
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Inferred Mineral Resource
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2012
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Odysseus North - Massive 1
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48,043
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11.6
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5,563
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Indicated Mineral Resource
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2012
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TOTAL COSMOS AREA
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9,860,562
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2.4
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240,353
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2. Mt Goode Area
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13,563,000
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0.8
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105,791
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Measured Mineral Resource
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2012
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Mt Goode
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27,363,000
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0.6
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158,705
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Indicated Mineral Resource
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2012
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12,009,000
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0.5
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62,447
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Inferred Mineral Resource
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2012
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TOTAL MT GOODE AREA
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52,935,000
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0.6
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326,944
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TOTAL MINERAL RESOURCES
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62,795,562
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0.9
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567,297
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-ENDS-
For further details, please contact:
Dan Lougher David Southam
Managing Director - Western Areas Ltd Executive Director - Western Areas Ltd Telephone +61 8 9334 7777 Telephone +61 8 9334 7777
Email: [email protected] Email: [email protected]
Shane Murphy FTI Consulting
Telephone +61 8 9485 8888 / 0420 945 291
Email: [email protected] Or visit: www.westernareas.com.au
COMPETENT PERSON'S STATEMENT:
The information within this report as it relates to mineral resources is based on information compiled by Mr Andre Wulfse and Mr Charles Wilkinson of Western Areas Ltd. Mr Wulfse and Mr Wilkinson are members of AusIMM and are full time employees of the Company. Mr Wulfse and Mr Wilkinson have sufficient experience which is relevant to the style of mineralisation and type of deposit under consideration and to the activity which they are undertaking to qualify as Competent Persons as defined in the 2012 Edition of the 'Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves.' Mr Wulfse and Mr Wilkinson consent to the inclusion in the report of the matters based on the information in the form and context in which it appears.
FORWARD LOOKING STATEMENT:
This release contains certain forward-looking statements including nickel production targets. Often, but not always, forward looking statements can generally be identified by the use of forward looking words such as 'may', 'will', 'expect', 'intend', 'plan', 'estimate', 'anticipate', 'continue', and 'guidance', or other similar words and may include, without limitation, statements regarding plans, strategies and objectives of management, anticipated production and expected costs.
Examples of forward looking statements used in this report include: 'Third potential underground mine with the undeveloped Odysseus high grade deposit ' and 'The Odysseus deposit holds some high grade massive sulphide intersections of up to 12% nickel which we will be
looking to expand upon in the future.', and ''.
These forward-looking statements are subject to a variety of risks and uncertainties beyond the Company's ability to control or predict which could cause actual events or results to differ materially from those anticipated in such forward-looking statements.
This announcement does not include reference to all available information on the Company or the Cosmos Nickel Complex and should not be used in isolation as a basis to invest in Western Areas. Any potential investors should refer to Western Area's other public releases and statutory reports and consult their professional advisers before considering investing in the Company.
For Purposes of Clause 3.4 (e) in Canadian instrument 43-101, the Company warrants that Mineral Resources which are not Mineral Reserves do not have demonstrated economic viability.
Table 1
Mineral Resource Estimation Odysseus
2012 Edition JORC Code
Section 1 Sampling Techniques and Data
Criteria
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JORC Code explanation
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Commentary
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Sampling techniques
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Nature and quality of sampling (e.g. 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.
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Sample representivity is assured by an industry standard internal QAQC program and assays were done by an independent commercial laboratory
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All samples are prepared and assayed by an independent commercial laboratory whose instruments are regularly calibrated
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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 (e.g. 'reverse circulation drilling was used to obtain 1 m samples from which 3 kg was pulverised to produce a 30 g charge for fire assay'). In other cases more explanation may be required, such as where there is coarse gold that has inherent sampling problems. Unusual commodities or mineralisation types (e.g. submarine nodules) may warrant disclosure of detailed information.
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Diamond core is marked at 1 m intervals and sample lengths are typically of this length.
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Sample intervals marked up by geologists based on geology.
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Sampled mineralisation intervals are sent to a commercial laboratory for crushing and grinding before assaying.
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Drilling techniques
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Drill type (e.g. core, reverse circulation, open-hole hammer, rotary air blast, auger, Bangka, sonic, etc) and details (e.g. core diameter, triple or standard tube, depth of Diamond tails, face- sampling bit or other type, whether core is oriented and if so, by what method, etc).
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Drill sample recovery
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Logging
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Sub-sampling techniques and
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Criteria
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JORC Code explanation
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Commentary
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sample preparation
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If non-core, whether riffled, tube sampled, rotary split, etc and whether sampled wet or dry.
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The field crew prepares and inserts the QAQC certified reference materials into the relevant calico bags.
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OREAS and Geostats standards have been selected based on their grade range and mineralogical properties, with approximately 12 different standards used.
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Quality of assay data and laboratory tests
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All samples are assayed by an independent certified commercial laboratory. The laboratory used is experienced in the preparation and analysis of nickel sulphide ores.
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Samples are analysed by ALS Chemex in Perth for Ag, Al, As, Co, Cr, Cu, Fe, Mg, Mn, Ni, Pb, S, Ti, Zn and Zr.
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Genalysis Laboratory Service (GLY) is the Umpire Laboratory used to check analysis on pulps provided by ALS.
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The principal analytical method used incorporated a four acid digest with conventional ICP-AES analysis, which also includes gravimetric analysis for determining specific gravity.
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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.
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Nature of quality control procedures adopted (e.g. standards, blanks, duplicates, external laboratory checks) and whether acceptable levels of accuracy (i.e. lack of bias) and precision have been established.
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Certified reference materials are included in all batches dispatched at an approximate frequency of 1 per 25 samples, with a minimum of two per batch.
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Field duplicates are inserted into submissions at an approximate frequency of 1 in 25, with placement determined by Nickel grade and homogeneity. Lab checks, both pulp and crush, are taken alternately by the lab at a frequency of 1 in 25.
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Accuracy and precision were assessed using industry standard procedures such as control charts and scatter plots.
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Evaluations of standards are completed on a monthly, quarterly and annual basis using QAQCR.
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Verification of sampling and assaying
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Documentation of primary data, data entry procedures, data verification, data storage (physical and electronic) protocols.
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All geological logging was carried out to a high standard using well established geology codes in LogChief software.
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All other data including assay results are imported via Datashed software.
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Drillholes, sampling and assay data is stored in a SQL Server database located in a dedicated data center.
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Location of data points
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Criteria
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JORC Code explanation
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Commentary
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in Mineral Resource estimation.
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collar locations verified via survey pickup.
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A two point transformation is used to convert the data from AMG84_51 mine grid and vice versa.
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Mine grid points: easting = 250,000, northing = 6,900,000, elevation = -10,000.
AMG84_51 points: easting = -250,000, northing = -6,900,000, elevation = 10,000.
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Data spacing and distribution
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Drillhole spacing ranges from 22 m to 76 m, averaging 50 m.
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The northern zone from 44,690mN to 44,760mN has a significant gap in data density coupled with intrusives into the mineralised corridor.
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Orientation of data in relation to geological structure
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Sample security
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Audits or reviews
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Section 2: Reporting of Exploration Results - Odysseus
(Criteria listed in Section 1, also apply to this section.)
Criteria
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JORC Code explanation
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Commentary
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Mineral tenement and land tenure status
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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.
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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.
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Cosmos Nickel Complex comprises 26 tenements covering some 9,226Ha. The tenements include mining leases and miscellaneous licenses
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Western Areas wholly owns 23 tenements, which were acquired from Xstrata Nickel Australasia in October 2015. The remainder of the tenements (3) are subject to a Joint Venture with Alkane Resources NL, where Western Areas has earned 80.6% interest
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All tenements are in good standing
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Exploration done by other parties
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Geology
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The deposits form part of the Cosmos Nickel Complex, which lies within the Agnew-Wiluna Belt of the central Yilgarn Craton, Western Australia
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The deposit style is komatiite hosted, disseminated to massive nickel sulphides.
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The mineralisation typically occurs in association with the basal zone of high MgO cumulate ultramafic rocks.
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Many of the higher grade ore bodies in the Cosmos Nickel Complex also show varying degrees of remobilisation, and do not occur in a typical mineralisation profile
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Drill hole Information
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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:
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easting and northing of the drill hole collar
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elevation or RL (Reduced Level - elevation above sea level in metres) of the drill hole collar
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dip and azimuth of the hole
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down hole length and interception depth
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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.
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Data aggregation methods
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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.
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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.
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The assumptions used for any reporting of metal equivalent values should be clearly stated.
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Relationship between mineralisation widths and intercept lengths
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These relationships are particularly important in the reporting of Exploration Results.
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If the geometry of the mineralisation with respect to the drill hole angle is known, its nature should be reported.
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If it is not known and only the down hole lengths are reported, there should be a clear
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Criteria
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JORC Code explanation
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Commentary
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statement to this effect (e.g. 'down hole length, true width not known').
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Diagrams
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Balanced reporting
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Other substantive exploration data
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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.
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Further work
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The nature and scale of planned further work (eg tests for lateral extensions or depth extensions or large-scale step-out drilling).
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Diagrams clearly highlighting the areas of possible extensions, including the main geological interpretations and future drilling areas, provided this information is not commercially sensitive.
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Section 3 Estimation and Reporting of Mineral Resources - Odysseus
(Criteria listed in section 1, and where relevant in section 2, also apply to this section.)
Criteria
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JORC Code explanation
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Commentary
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Database integrity
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Measures taken to ensure that data has not been corrupted by, for example, transcription or keying errors, between its initial collection and its use for Mineral Resource estimation purposes.
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Database validated by site geologists.
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All data is entered utilising Maxwell's LogChief software for logging of drillhole data in the field on dedicated laptops.
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Assay data in the form of csv files from the primary assay laboratory ALS Chemex and the umpire assay laboratory Genalysis received by exploration are imported directly into the database whenever possible.
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The LogChief software provides the first level of data validation, utilising locked lookup tables for all data fields which have set codes attributed to them.
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The Datashed database utilises validation lookup tables and trigger scripts to ensure that all numeric, date and code information is correct.
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All QAQC controls are reviewed after each submission. Notification of failures is immediately sent to Senior Geologist and results within until resolution.
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Site visits
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Geological interpretation
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Mineralised envelopes were digitised at 10 m sections in Vulcan and polygons were snapped to both underground and surface drillhole intercepts as appropriate. Wireframe triangulations were created from digitised polygons, and subdivided into domains as necessary, while taking into account geology and / or grade distribution. All triangulations were validated and checked to ensure they are closed and not crossing.
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Six geological and geostatistical mineralised domains were created:
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High grade (>2.0% Ni)
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Medium grade (1.5 - 2.0% Ni)
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Medium-low grade (1.0 - 1.5% Ni)
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Low grade (0.4 - 1.0% Ni)
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MG_S (single hit intersections) (1.5 - 2.0% Ni)
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HG_S (single hit intersections (>2.0% Ni)
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Four lithological waste domains were also created:
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The Odysseus deposit is hosted within an ultramafic unit and consists of disseminated nickel sulphide mineralisation as a high grade core surrounded by medium and low grade shells. Late stage pegmatites sit above, below and also crosscut the modelled ore body, but have little continuity between drillholes.
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Mineralised envelopes were digitised at 10 m sections in Vulcan and polygons were snapped to both underground and surface drillhole intercepts as appropriate. Wireframe triangulations were created from digitised polygons, and subdivided into domains as necessary, while taking into account geology and / or grade distribution. All triangulations were validated and checked to ensure they are closed and not crossing.
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Criteria
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JORC Code explanation
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Commentary
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The majority of the Odysseus Deposit remains unaffected by late stage intrusives, with minor intersections of pegmatite having little to no continuity between drill holes. A pegmatite intrusion/fault intersects the deposit between 44,700mN and 44,730mN and another truncates mineralisation at approximately 44,775mN, however the main corridor of mineralisation is not adequately closed off from 44,700mN to 44,775mN.
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Currently the Odysseus Disseminated Nickel Deposit is poorly defined to the north. Mineralisation of potential economic grades and widths remain open down-plunge.
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Dimensions
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Factors affecting geological continuity relate to a pegmatite intrusion/fault which intersects the deposit between 44,700mN and 44,730mN and another which truncates mineralisation at approximately 44,775mN.
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Estimation and modelling techniques
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The nature and appropriateness of the estimation technique(s) applied and key assumptions, including treatment of extreme grade values, domaining, interpolation parameters and maximum distance of extrapolation from data points. If a computer assisted estimation method was chosen include a description of computer software and parameters used.
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Wireframing of grade and geological domains using underground and surface drilling. Sample data was composited to 1m downhole lengths and flagged on domain codes generated from 3D mineralised wireframes (high, medium, medium-low, low, MG_S and HG_S) and 3D lithological wireframes (FV, FP, GP and UM).
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Directional variography was performed for the Ni and density data from the combined six mineralised domains using Snowden Supervisor software. FV, FP, GP and UM Variograms were also modelled and used to estimate grades into the waste blocks. Due to the multiple orientations of GP units, an additional search ellipse was generated from geological wireframe orientations.
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Grade estimation of Ni, As, Co, Fe, MgO, Pb, S, Zn and density using Ordinary Kriging was completed using Vulcan software. The domains have hard boundaries which ensured no grade smearing between domains and correlate well with raw data.
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Due to missing density data, average values were assigned to the FV, FP, GP and non-estimated UM domains. The method is considered appropriate due to drill hole spacing and the nature of mineralisation.
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All estimation was completed at the parent cell scale to avoid any potential geostatistical support issues.
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Top cut investigations were completed and no top cuts were applied during estimation. Low and high grade Ni domains were used instead.
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This 2012 MRE is the sixth resource estimate for the Odysseus Disseminated Nickel Sulphide Deposit.
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The resource model volumetrics were compared to the Sept 2011 results; a minor negative variance exists through the central area of the model.
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Deleterious elements S, As, Pb, Fe, Zn, Cu, Co and MgO were estimated using Ni variography.
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A proto model was constructed using parent blocks of 10 mE x 15 mN x 5 mRL and sub-blocked to 1.25m x 2.5m x 1.25m.
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Drillhole spacing ranges from 22 m to 76 m, averaging 50 m.
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The size of the search ellipse was based on the Ni variography for each domain. Six search passes were used; 100% of blocks were estimated during the 1st pass Ni estimate for HG, MG and MLG domains, and over 99% for the LG domain. HG_S and MG_S
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Criteria
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JORC Code explanation
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Commentary
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domains achieved greater than 88% and 87% respectively during the 1st pass.
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Mineralised zones were digitised and polygons were snapped to both underground and surface drilling intercepts. Each wireframe is representative of a grade domain, and used in compositing and estimating to ensure high grades are not smearing into the low grade zones and vice versa.
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To ensure an accurate estimate, all high grade isolated intersections were placed in separate domains (MG_S,HG_S) to ensure they are still accounted for, but their contribution do not artificially inflate the final resource inventory. For reporting purposes, the MG_S and HG_S material are classified as non-JORC 'Mineral Inventory'.
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The process of validation, the checking process used, the comparison of model data to drill hole data, and use of reconciliation data if available.
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Moisture
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Estimation validation techniques included visual comparison of the composites and estimate blocks, graphs of pass number versus % filled, swathe plots of the composite grades vs the grade of the block model, and swathe plots of kriging variance, kriging efficiency and slope of regression.
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Cut-off parameters
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Mining factors or assumptions
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Assumptions made regarding possible mining methods, minimum mining dimensions and internal (or, if applicable, external) mining dilution. It is always necessary as part of the process of determining reasonable prospects for eventual economic extraction to consider potential mining methods, but the assumptions made regarding mining methods and parameters when estimating Mineral Resources may not always be rigorous. Where this is the case, this should be reported with an explanation of the basis of the mining assumptions made.
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The mineral envelope was determined by cut offs: High (>2.0%), Medium (1.5-2.0%), Medium-Low (1.0-1.5%), Low (0.4-1.0%), MG_S (1.5 - 2.0% Ni) and HG_S (>2.0% Ni).
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The resource is reported above 1.5% Ni cut off grades.
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Metallurgical factors or assumptions
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The basis for assumptions or predictions regarding metallurgical amenability. It is always necessary as part of the process of determining reasonable prospects for eventual economic extraction to consider potential metallurgical methods, but the assumptions regarding metallurgical treatment processes and parameters made when reporting Mineral Resources may not always be rigorous. Where this is the case, this should be reported with an explanation of the basis of the metallurgical assumptions made.
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Environmental factors or assumptions
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Assumptions made regarding possible waste and process residue disposal options. It is always necessary as part of the process of determining reasonable prospects for eventual economic extraction to consider the potential environmental impacts of the mining and processing operation. While at this stage the determination of potential environmental impacts, particularly for a greenfields project, may not always be well advanced, the status of early consideration of these potential environmental impacts should be reported.
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