Mt Cattlin Resource Update with Higher Grade
BRISBANE, April 17, 2023 - Allkem Ltd. (ASX|TSX: AKE, "Allkem" or the "Company") provides an updated Mineral Resource Estimate ("MRE") and development drilling update at 31 December 2022 for its Mt Cattlin operation in Western Australia.
HIGHLIGHTS
- The completion of a major infill drilling program (132 drillholes 31,231 metres) and review of the MRE has successfully converted Inferred resources to Indicated category. Total tonnes of contained metal increased by 4%
- The updated Mineral Resource of 12.8 Mt @ 1.3% Li2O and 179ppm Ta2O5 reflects higher lithium grade with 92% of the total resource tonnage now sitting in the Indicated category (up by 130%), supporting an upcoming Reserve update and life of mine extension review
- Open pit and underground mining studies are currently being undertaken which include diamond drilling for geotechnical purposes and additional metallurgical test work. This will result in a revised ore reserve and will determine the trade-off between open pit and underground mining options
- Stage 3 exploration drilling in the SW area has been completed and assay results are pending
- Further step out drilling is planned for late CY23 to test down dip extension of the pegmatite orebodies beyond the area included in this MRE
RESOURCE EXTENSION DRILLING
Allkem commenced a three-phase resource extension program in April 2022, the first phase targeting the conversion of inferred resource into the indicated category and the second to test two pegmatite lenses along strike and at depth.
Results were included in the 30 June 2022 Resource Update and interim drilling and assay results were released 5 October 2022 for 81 RC drillholes and 19,177 metres. Additional drilling for 51 RC drillholes for 12,054m were completed subsequently to total 132 drill holes for 31,231 (Figure 1, below).
Assay highlights from the upper pegmatite include:
| Drill Hole ID | From (m) | To (m) | Width (m) | Li2O% | Ta2O5ppm |
| NWRC214 | 102 | 117 | 15 | 1.71 | 157 |
| NWRC229 | 53 | 67 | 14 | 2.02 | 52 |
| NWRC230 | 58 | 76 | 18 | 1.42 | 90 |
| NWRC237 | 66 | 83 | 17 | 1.46 | 87 |
Highlights from the lower pegmatite include:
| Drill Hole_ID | From (m) | To (m) | Width (m) | Li2O% | Ta2O5ppm |
| NWRC140 | 235 | 249 | 14 | 2.31 | 126 |
| NWRC162 | 232 | 245 | 13 | 2.20 | 586 |
| NWRC167 | 211 | 223 | 12 | 3.04 | 154 |
| NWRC169 | 224 | 236 | 12 | 2.39 | 154 |
All intercepts are reported down hole, however the orientation of the drilling is such that intercepts are approximate true widths.
Drillhole collars are tabulated in Appendix 2, and all significant assays, with intercept lengths greater than 3m, with a maximum of 1m internal dilution are presented in Appendices 3 and 4 for the upper and lower pegmatite, respectively.
Figure 1: Mt Cattlin 2022 Mineral Resource drilling at NW pit
Figure 2: Mt Cattlin Cross section looking west
MINERAL RESOURCE UPDATE
The Mineral Resource Estimate at 31 December 2022 (Table 1) represents the 30 June 2022 resource estimate, adjusted for mining and stockpile depletion from 30 June to 31 December 2022 combined with infill drilling undertaken during 2022. The target pegmatites are drilled out to a nominal 40 x 40m spacing. The "Indicated" proportion of the classified Mineral Resource contained metal has increased by 130% with a corresponding decrease of 'Inferred" resources by -80%.
Table 1: Mt Cattlin Mineral Resource at 31 December 2022
Mineral Resource Estimate for the Mt Cattlin Spodumene Deposit reported at 0.4% cut off grade - All material types.
| Category | Tonnage | Grade | Grade | Contained Metal | Contained Metal | Nett contained metal variance to prior Statement | ||
| Mt | % Li2O | ppm Ta2O5 | ('000) t Li2O | lbs Ta2O5 | % | |||
| Measured | In-situ | 0.1 | 1.0 | 170 | 1 | 37,000 | 100 | % |
| Indicated | In-situ | 9.6 | 1.4 | 134 | 134 | 2,899,000 | 130 | % |
| Stockpiles | 1.8 | 0.8 | 122 | 14 | 484,000 | -25 | % | |
| Inferred | In-situ | 1.3 | 1.3 | 169 | 17 | 516,000 | -80 | % |
| Total Resource at 31 December 2022 | 12.8 | 1.3 | 179 | 167 | 3,936,000 | 4 | % | |
| Decrease | Notes | |||||||
| Measured | - | - | - | - | ||||
| Indicated + Inferred | -0.4 | 1.3 | -5 | Mining depletion by tonnage reconciliation | ||||
| Indicated + Inferred | -2.9 | 1.1 | -31 | Elimination of fine-grained mineralisation and waste | ||||
| Stockpiles | -0.6 | 0.8 | -5 | Difference between ore tonnes mined and processed | ||||
| Increase | Notes | |||||||
| Measured | 0.1 | 1.0 | 1 | 37,000 | Remnant in SW | |||
| Indicated + Inferred | 3.3 | 1.40 | 46 | 151,000 | Addition at periphery and at depth | |||
| Stockpiles (Indicated) | - | - | - | - | - | - | ||
| Total Resource at 30 June 2022 | 13.3 | 1.2 | 131 | 161 | 3,835,000 | |||
Notes: Reported at cut-off grade of 0.4% Li2O. The proportion of potential open pit (64%) and underground resource (36%) is tabulated below (Table 2). The statements of Mineral Resources conforms to the Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves (the JORC Code) 2012 edition. All tonnages reported are dry metric tonnes. Excludes mineralisation classified as oxide and transitional. Minor discrepancies may occur due to rounding to appropriate significant figures.
The Mineral Resources are reported at a cut-off of 0.4% Li2O. Table 2 below demonstrates that 64% of the Mineral Resource reports inside a USD 1,100 pit shell which satisfies the requirements for Reasonable Prospects for Eventual Economic Extraction ("RPEEE") as defined in the JORC Code (2012) and is potentially minable by open cut methods. The remainder of the resource is a direct continuation of the mineralised pegmatites and may be minable by underground mining methods such as room and pillar with decline access. This will be confirmed in studies that are underway. The updated resource has been depleted for mining and stockpile reclamation (by tonnes) in the six month period between this update and the previous estimate.
Table 2: Classified Mt Cattlin Mineral Resource depleted for mining as at 31 December 2022
| Mineral Resource Estimate for the Mt Cattlin Spodumene Deposit - December 2022 (excluding stockpiles) | ||||||||||||||||||||
| Material | Cut-Off | Measured | Indicated | Inferred | TOTAL | |||||||||||||||
| Tonnes (kt) | Li2O % | Ta2O5 ppm | Fe2O3 % | Tonnes (kt) | Li2O % | Ta2O5 ppm | Fe2O3 % | Tonnes (kt) | Li2O % | Ta2O5 ppm | Fe2O3 % | Tonnes (kt) | Li2O % | Ta2O5 ppm | Fe2O3 % | |||||
| In-Pit Resource | 0.40 % | 6,900 | 1.4 | 137 | 1.91 | 57 | 1.3 | 102 | 2.36 | 7,000 | 1.4 | 137 | 1.91 | |||||||
| Remaining u/g Resource | 92 | 1.0 | 206 | 2.18 | 2,700 | 1.3 | 224 | 2.06 | 1235 | 1.3 | 183 | 2.14 | 4,000 | 1.4 | 248 | 2.04 | ||||
| Total | 92 | 1.0 | 206 | 2.18 | 9,600 | 1.3 | 163 | 2.00 | 1,292 | 1.3 | 179 | 2.15 | 11,000 | 1.3 | 163 | 2.00 | ||||
| The preceding statements of Mineral Resources conforms to the Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves (JORC Code) 2012 Edition. All tonnages reported are dry metric tonnes. Minor discrepancies may occur due to rounding to appropriate significant figures. | ||||||||||||||||||||
The open pit RPEEE test was re-visited in H2 CY22 to reflect spodumene pricing at USD 900, 1,100 and 1,500 and FX AUD/USD 0.70. It was observed that both the USD 1,100 and 1,500 Mineral Resource remain limited by drilling data which will be resolved by further step out drilling planned for later in CY23. Depleted stockpiles at the same record date have been included in the Mineral Resource. Depletion of high-grade material, an updated optimised pit shell design and the impact of additional drilling is reflected in the updated Mineral Resource. Remnant classified Mineral Resources under the backfilled 2SW pit have been included as potential underground feed.
The resource classification has been applied to the MRE based on the drilling data spacing, grade and geological continuity, the quality of the resource estimate as defined by the slope of regression and data integrity. Following recent experiences with mining in the current pit, fine grained pegmatite and unmineralised pegmatite waste was domained out of the estimate at the geological modelling stage using a < 0.3% lithia wireframe supported with a Na2O < 4% proxy.
- Minor portions immediately adjacent to the SW of the current mining area have been classified as Measured where prior grade control drilling had been completed. No portions of the NW area have been classified as Measured Mineral Resources
- Pegmatites that have been defined by drillholes on a spacing at or closer than 40 m by 40 m, estimated on the first two passes (up to the range of the variogram) and have returned a slope of regression value above 0.5 have been classified as Indicated Mineral Resources. In order to avoid the generation of an inconsistent classification each pegmatite domain is accessed individually and estimates within are used to classify the majority of Indicated blocks; and
- The blocks that have been estimated on either the first, second or third pass and have been defined by drillholes spaced wider apart than 40 m by 40 m, with lower levels of confidence in the quality of the estimate and hence in the continuity of grade, have been classified as Inferred Mineral Resources.
A description of the major factors that resulted in changes from the June 2022 Mineral Resource Estimate to the December 2022 Mineral Resource Estimate are:
- Depletion for mining and stockpile reclamation
- Change in resource classification to majority "Indicated" in a nominal 40 x 40m intercept spacing in the completed drill out
- Drill out at depth to the limits of the nominal RPEEE USD 1,100 pit shell
- Change in the methods of geological domaining to exclude pegmatite types (waste and fine-grained pegmatite) that result in poor or low metallurgical recoveries
The Mineral Resource Estimate depletion and reporting was supervised and completed by Allkem staff. Allkem has assumed responsibility for the logging, sampling, analytical and quality assurance/quality control protocols currently in place for estimates and depletions.
NEXT STEPS
Reserve update
Further HQ diameter diamond drilling has been completed with seven HQ size drillholes for 1,682m completed to support geometallurgical and geotechnical test work to inform the Mt Cattlin mine life extension study, which aims to inform approvals and design of both potential opencut and underground options. Initial results are expected by mid CY23.
Exploration Drilling
Exploration drilling to the southwest of the current mineralised pegmatites is complete and assays are awaited. The first drillhole SWRC089 (azure coloured collar in Figure 1) returned:
| Hole ID | From (m) | To (m) | Width (m) | Li2O% | Ta2O5 ppm |
| SWRC089 | 153 | 163 | 10 | 1.84 | 163 |
| SWRC089 | 173 | 177 | 4 | 0.49 | 117 |
RESOURCE AND RESERVE CONTROLS & GOVERNANCE
Allkem ensures that quoted Mineral Resource and Ore Reserve estimates are subject to internal controls, peer review and validation at both project and corporate levels. Mineral Resource and Ore Reserves are estimated and reported in accordance with the 2012 edition of the JORC Code.
Allkem stores and collects exploration data using industry standard software that contains internal validation checks. Exploration samples from drilling have certified reference material standards introduced to the sample stream at set ratios, typically 1 per 25 samples. These are reported as necessary to the relevant Competent Persons to assess both accuracy and precision of the assay data applied to resource estimates. In resource modelling, block models are validated by checking the input drill hole composites against the block model grades by domain.
Allkem engages independent, qualified experts on a commercial fee for service basis, to undertake Mineral Resource and Ore Reserve audits. Allkem internally reconciles the resource outcomes to validate both the process and the outcome. A RPEEE has been tested against a Whittle Optimisation with only the revenue factor changed from USD 900, 1,100 and to 1,500.
The Company has developed its internal systems and controls to maintain JORC compliance in all external reporting, including the preparation of all reported data by Competent Persons who are members of the Australasian Institute of Mining and Metallurgy or a 'Recognised Professional Organisation'. As set out above, the Mineral Resource and Ore Reserve statements included in this announcement were reviewed by suitably qualified Competent Persons (below) prior to their inclusion, in the form and context announced.
This release was authorised by Mr Martin Perez de Solay, CEO and Managing Director of Allkem Ltd..
| Allkem Ltd. ABN 31 112 589 910 Level 35, 71 Eagle St Brisbane, QLD 4000 | Investor Relations & Media Enquiries Andrew Barber M: +61 418 783 701 E: Andrew.Barber@allkem.co Phoebe Lee P: +61 7 3064 3600 E: Phoebe.Lee@allkem.co | Connect info@allkem.co +61 7 3064 3600 www.allkem.co | |
IMPORTANT NOTICES
This investor ASX/TSX release (Release) has been prepared by Allkem Ltd. (ACN 112 589 910) (the Company or Allkem). It contains general information about the Company as at the date of this Release. The information in this Release should not be considered to be comprehensive or to comprise all of the material which a shareholder or potential investor in the Company may require in order to determine whether to deal in Shares of Allkem. The information in this Release is of a general nature only and does not purport to be complete. It should be read in conjunction with the Company's periodic and continuous disclosure announcements which are available at allkem.co and with the Australian Securities Exchange (ASX) announcements, which are available at www.asx.com.au.
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Forward Looking Statements
Forward-looking statements are based on current expectations and beliefs and, by their nature, are subject to a number of known and unknown risks and uncertainties that could cause the actual results, performances and achievements to differ materially from any expected future results, performances or achievements expressed or implied by such forward-looking statements, including but not limited to, the risk of further changes in government regulations, policies or legislation; the risks associated with the continued implementation of the merger between the Company and Galaxy Resources Ltd., risks that further funding may be required, but unavailable, for the ongoing development of the Company's projects; fluctuations or decreases in commodity prices; uncertainty in the estimation, economic viability, recoverability and processing of mineral resources; risks associated with development of the Company Projects; unexpected capital or operating cost increases; uncertainty of meeting anticipated program milestones at the Company's Projects; risks associated with investment in publicly listed companies, such as the Company; and risks associated with general economic conditions.
Subject to any continuing obligation under applicable law or relevant listing rules of the ASX, the Company disclaims any obligation or undertaking to disseminate any updates or revisions to any forward-looking statements in this Release to reflect any change in expectations in relation to any forward-looking statements or any change in events, conditions or circumstances on which any such statements are based. Nothing in this Release shall under any circumstances (including by reason of this Release remaining available and not being superseded or replaced by any other Release or publication with respect to the subject matter of this Release), create an implication that there has been no change in the affairs of the Company since the date of this Release.
Competent Person Statement
The information in this announcement that relates to Exploration Results and Mineral Resources is based on information compiled and supervised by Albert Thamm, B.Sc. (Hons)., M.Sc. F.Aus.IMM, a Competent Person who is a Fellow of The Australasian Institute of Mining and Metallurgy. Albert Thamm is a full-time employee of Galaxy Resources Pty. Limited. Albert Thamm has sufficient experience that is relevant to the style of mineralization and type of deposit under consideration and to the activity 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'. Albert Thamm consents to the inclusion in this announcement of the matters based on his information in the form and context in which it appears.
The scientific and technical information contained in this announcement has been reviewed and approved by Albert Thamm, as it relates to geology, exploration, drilling, sample preparation, data verification and the depleted Mineral Resource.
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This announcement has been prepared for publication in Australia and may not be released to U.S. wire services or distributed in the United States. This announcement does not constitute an offer to sell, or a solicitation of an offer to buy, securities in the United States or any other jurisdiction, and neither this announcement or anything attached to this announcement shall form the basis of any contract or commitment. Any securities described in this announcement have not been, and will not be, registered under the U.S. Securities Act of 1933 and may not be offered or sold in the United States except in transactions registered under the U.S. Securities Act of 1933 or exempt from, or not subject to, the registration of the U.S. Securities Act of 1933 and applicable U.S. state securities laws.
APPENDIX 1 - JORC 2012 TABLE 1 DISCLOSURE
Section 1: Sampling Techniques and Data
| MT CATTLIN LITHIUM PROJECT SAMPLING AND DATA | ||
| Sampling techniques | Nature and quality of sampling (e.g. cut channels, random chips, or specific specialized 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 mineralization 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 pulverized 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 mineralization types (e.g. submarine nodules) may warrant disclosure of detailed information. | Pre-2017 Mt Catlin mineralization was sampled using a mixture of Diamond (DD) Reverse Circulation drill holes (RC), rotary Air Blast (RAB) and Open Hole (OH). In the north zone drilling is a 40mE x 40mN spacing and infilled to 20mE to 25mE x 20mN to 20mN in the central zone. In the south the drilling is on a 40mE x 80mN pattern. Drill holes were drilled vertical to intersect true thickness of the spodumene mineralization. A total of 39 DD holes for 1,528.56m, 986 RC holes for 48,763m,59 OH holes for 1,999m and 23 RAB for 402m had been completed before 2017. The drill-hole collars were surveyed by professional survey contractors. A total of 71 drill holes were surveyed by Surtron Technologies Australia of Welshpool in 2010. Sampling was carried out under Galaxy Resources QAQC protocols and as per industry best practice. RC sample returns were closely monitored, managed and recorded. Drill samples were logged for lithology and SG measurements. Diamond HQ and PQ core was quarter-cored to sample lengths relating to the geological boundaries, but not exceeding 1m on average. RC samples were composited from 1m drill samples split using a two-stage riffle splitter 25/75 to obtain 2kg to 4kg of sample for sample preparation. All samples were dried, crushed, pulverized and split to produce a 3.5kg and then 200g sub-sample for analysis For Li (method AAS40Q), for Ta, Nb and Sn (method XRF78O) and in some cases for SiO2, Al2O3, CaO, Cr2O3, Fe2O3, K2O3, MgO, MnO, P2O5, SO3, TiO2 and V2O5 were analysed by XRF78O. Entire drill-hole lengths were submitted for assay. Drilling 2017-8 From 1m of drilling and sampling, two 12.5% splits are taken by a static cone splitter in calico drawstring bags. This obtains two 2kg to 4kg samples with one being retained as an archive sample and the other submitted for assay, where required an archive bag is used as the duplicate sample. A 4.5-inch diameter rod string is used and the cyclone is cleaned at the end of every 6m rod as caking occurs from the mandatory use of dust suppression equipment. Drilling November 2018 - 2021 Subsequent to 2018 update, 5,912m (41 holes) of new reverse circulation (RC) and 273.65m of diamond tails (2 holes) has been completed (excluding metallurgical and geotechnical) has taken place. From 1m of drilling and sampling, two 12.5% splits are taken by a static cone splitter in calico drawstring bags. This obtains two 2kg to 4kg samples with one being retained as an archive sample and the other submitted for assay, where required an archive bag is used as the duplicate sample. A 4.5-inch diameter rod string is used and the cyclone is cleaned at the end of every 6m rod as caking occurs from the mandatory use of dust suppression equipment. 2022 Drilling The current drillhole dataset for the project contains 3,232 drillholes, for 175,950 metres, comprised of a combination of reverse circulation (RC), diamond drilling (DD), and RC with a diamond tail (RC_DDT) drillholes. The dominant drillhole type is RC, with over 95% of the metres being from RC drillholes. |
| Hole_Type | Count | Metres | % Drillholes | % Metres | ||||
| DDH | 45 | 5,437.8 | 1.4% | 3.1% | ||||
| RC | 3,173 | 169,037.8 | 98.2% | 96.1% | ||||
| RC_DDT | 14 | 1,474.4 | 0.4% | 0.8% | ||||
| TOTAL | 3,232 | 175,950 | 100% | 100% | ||||
| Drilling techniques | 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.). | RC drilling hammer diameter was generally 4 & 5/8 inches in early exploration, from 2009 and 2010 the bit diameter was 5 ¼ inches. RC 2017 -2020 5.25-inch face sampling hammer, reverse circulation, truck mounted or tracked drilling rigs, Three Rivers Drilling, Castle Drilling. Diamond core is generally RC from surface, and either PQ size tails in weathered rock and narrowed to HQ in fresh rock (standard tubing). Core was not oriented as the disseminated and weathered nature of the mineralization does not warrant or allow it. Diamond core is typically for metallurgical test-work. Pre-collars drilled short of mineralisation. RC 2021 A 5.25-inch face sampling hammer, used in reverse circulation. ASX (Australian Surface Exploration) drillers used for RC (including pre-collars). Diamond 2021: Wizard Drilling utilised for diamond drilling from surface. HQ size Metallurgical and geotechnical diamond drilling (standard tubing). Two Metallurgical holes were diamond tails from approximately 70m to 80m. Four Geotechnical holes were diamond from surface and two tails from 50-60m depth. RC 2022 PXD drilling was utilised for RC drilling from surface. HQ size Metallurgical and geotechnical diamond drilling (standard tubing) by Orlando Drilling. Four Metallurgical holes were and three Geotechnical holes were diamond drilled from surface and two diamond tails from 150-160m depth. | |
| 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. The total length and percentage of the relevant intersections logged. | All DD, RC and OH (PC) and RAB intervals were geologically logged (where applicable); RQD (DD only), interval weights, recovery, lithology, mineralogy and weathering were recorded in the database. The DD core was oriented using the Ezy-Mark tool and after 2019 using the Reflex ACT electronic orientation tool. Geological logging was qualitative. Recording of interval weights, recovery and RQD was quantitative. All DD core was photographed and representative 1m samples of RC and OH (PC) chips were collected in chip trays for future reference and photographed. All drill holes were logged in full. 2017-2023 logging All drill holes are logged and validated via LogChief/ Maxwells Geosciences/DataShed systems. Assays, standards and control limits are monitored after loading of each batch and reports supplied on demand. All drill holes are logged in full. Different Lithium bearing mineral species are logged in detail. | |
| Sub- sampling techniques and sample preparation | If core, whether cut or sawn and whether quarter, half or all core 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 sample preparation technique. Quality control procedures adopted for all sub-sampling stages to maximise representivity of samples. Measures taken to ensure that the sampling is representative of the in situ material collected, including for instance results for field duplicate/second-half sampling. Whether sample sizes are appropriate to the grain size of the material being sampled. | Pre-2016 sampling All fresh rock DD core was quarter-cored using a stand mounted brick saw. Soft, weathered DD core was also sampled quarter-core, using a knife and scoop where applicable and practical. RC samples were collected using a two stage riffle splitter. All samples were dry or dried prior to riffle-splitting. All 2kg 1m drill samples were sent to SGS, dried, crushed, pulverized and split to approximately -75µ to produce a sample less than 3.5kg sub-sample for analysis. Sampling was carried out under Galaxy Resources QAQC protocols and as per industry best practice. Duplicate, blank and standard reference samples were inserted into the sample stream at random, but averaging no less than 1 blank and standard in every 25 samples. Samples were selected periodically and screened to ensure pulps are pulverized to the required specifications. Duplicate quarter-core samples were taken from DD core at random for testing averaging one in every 25 samples. Duplicate riffle-split RC samples were taken at random, but averaging one every approximately 25 samples. The sample sizes are appropriate to the style, thickness and consistency of the mineralization at Mt Catlin. Drilling 2016 (SGS) Core was halved by saw and sample lengths typically 0.5m in length. Sample preparation involved crushing followed by splitting of sample if sample greater than 3 kg using a riffle splitter (SPL26), Dry sample, crush to 6mm, pulverise to 75µm (PRP88) in a LM5 Mill. Drilling 2017-2021 Diamond drilling was typically sawn half core with whole core used for metallurgical test work. Intertek (2017-8) Samples are sorted and weighed. Samples >3kg are riffle split and milled in LM5 to obtain 85% passing 75 Microns. A 400g pulp is taken and a nominal 0.25g sub-sample is fused with sodium peroxide. Nagrom: 2018-2021 RC chips are dried to 105C°, crushed to nominal top-size of 2 mm in a Terminator Jaw crusher using method CRU01. Pulverised up to 3 kg in a LM5 pulveriser mill at 80% or better passing 75µm, using method PUL01. If the sample is greater than 3 kg, the sample is dried, and split with rotary splitter before analysis, Diamond core is dried, crushed in a Terminator Jaw crusher to top size 6.3 mm, and pulverised in a LM5 mill up to 2.5 kg using method CRU01. If the sample is greater than 2.5 kg, the sample is riffle split after drying to reduce the sample size. Intertek 2022-3 Samples are sorted and weighed. Samples >3kg are riffle split and milled in LM5 to obtain 85% passing 75 Microns. A 400g pulp is taken and a nominal 0.25g sub-sample is assayed by Sodium peroxide fusion in a Ni crucible / MS, OES method FP6-Li/OM19. | |
| 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. 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 (e.g. standards, blanks, duplicates, external laboratory checks) and whether acceptable levels of accuracy (i.e. lack of bias) and precision have been established. | Pre-2016 QAQC All samples were dried, crushed, pulverized and split to produce a 3.5kg and then 200g sub-sample for analysis For Li (method AS40Q), for Ta, Nb and Sn (method XRF78O) and in some cases for SiO2, Al2O3, CaO, Cr2O3, Fe2O3, K2O3, MgO, MnO, P2O5, SO3, TiO2 and V2O5 were analysed by XRF78O. This process involves fusing the sample in a platinum crucible using lithium metaborate/tetraborate flux. For Cs, Rb, Ga, Be and Nb from time to time analysis was by IMS40Q - DIG40Q to ICPMS end. Duplicate, blank and certified reference samples were inserted into the sample stream at random, but averaging one every ~25 samples. Galaxy Resources utilized certified Lithium standards produced in China and one from SGS in Australia, STD-TAN1. Inter-laboratory checking of analytical outcomes was routinely undertaken to ensure continued accuracy and precision by the preferred laboratory. Samples were selected periodically and screened by the laboratory to ensure pulps are pulverized to the required specifications. All QAQC data is stored in the Mt Catlin database and regular studies were undertaken to ensure sample analysis was kept within acceptable levels of accuracy; the studies confirmed that accuracy and precision are within industry standard accepted limits. Umpire analysis performed on pulps at Genalysis and Ultratrace Perth 2016-QAQC In 2016 Perth SGS were used for a small 6 hole diamond program by General Mining. Samples were digested using a sodium peroxide fusion digest, method DIG90Q and the resultant solution from the digest was then presented to an ICP-MS for the quantification of Li2O, using method IMS40Q. The majority of standards submitted performed within expected ranges with a positive bias observed for two standards. 2017 - 2021 QAQC Samples (including QA/QC samples) were processed by Intertek PLC, Perth laboratory in 2017 and 2018, by utilised method FP1 digest (Peroxide Fusion - complete), MS analytical finish, 22 elements, Li2O detection limit 0.03% Ta2O5 detection limit, 0.2 ppm. Monthly review of QA/QC, which includes blanks, field duplicates, high grade standards and CRM (certified reference materials) and SRM (standard reference materials). FS_ICPMS is a Laboratory Method FP1/MS (mass spectrometry) used to analyse for Cs, Nb, Rb, Ta,Th, and U . FS/ICPES (inductively coupled plasma emission spectroscopy) is Laboratory method FP1/OE used to analyse Al, Fe, K, Li, and Si. Reports include calculated values of oxides for all elements. RC samples and diamond (including QA/QC samples) have been processed by Nagrom Perth, Perth Western Australia. Methods utilised from Lithium and Tantalum are ICP004 and ICP005 (Peroxide Fusion - complete). ICP005 utilises tungsten carbide bowl to reduce iron contamination at exploration and resource development stages (detection limit of 10ppm and 1ppm for Li2O and Ta respectively) Monthly review of QA/QC, which includes blanks, field duplicates, high grade standards and CRM (certified reference materials) and SRM (standard reference materials). All sampling has rigorous QAQC in terms of reference sampling as well as blank and standards introduced into the sample steam. Duplicate field samples show some evidence of high nugget effect. Typically, duplicate pairs plot within acceptable limits. Field duplicates have been submitted at a rate of 1 per 20.5 samples. Standards used are ASM0343, ASM0340 AMIS0339, OREAS147, OREAS148 and OREAS149. Standards reported only one result outside three standard deviations from 533 assays for Lithium. The majority of Tantalum standards reported within three standard deviations. Coarse blanks have shown no evidence of systematic contamination from 2016-2021 with results consistently low. QAQC in 2022-3 is broadly in line with the processes above, assays are by Intertek, Perth and Kalgoorlie. Standards used are OREAS 147, AMIS0341, OREAS 751, OREAS 753, OREAS 148, AMIS0341, AMIS0341, and OREAS 147 to support Sodium peroxide fusion in Ni crucible assay method MS, OES FP6-Li/OM19. This method provides near complete recovery for most samples. Ore grade standards e.g. OREAS 751 reported only four results outside 2 standard deviations from assays for Lithia. The majority of Tantalum standards reported within 2 standard deviations. The data is moderately precise. | |
| 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. | Pre-2018 Verification An external geological consultant and staff have visually assessed and verified significant intersections of core and RC and PC chips. Several core holes were compared to neighbouring RC and PC drill holes. The geological logging of the DD holes supports the interpreted geological and mineralization domains. Studies on assays results from twinned holes showed a close correlation of geology and assays. Primary data is recorded by hand in the field and entered Excel spread sheets with in-built validation settings and look-up codes. Scans of field data sheets and digital data entry spread sheets are handled on site at Mt Cattlin. Data collection and entry procedures are documented, and training given to all staff. QAQC checks of assays had identified several standards out of control, these were subsequently reviewed and results rectified. No clear and consistent biases were defined by Galaxy during the further investigations into QAQC performances although deviations were noted by Galaxy. 2017-8 Verification CP independently verified drilling, sampling, assay and results from validated, externally maintained and stored database. No adjustments to assay data other than conversion from Li to Li20 and Ta to Ta2O5. 2018 - 2022 Verification The CP independently verified drilling, sampling, assay and results from validated, externally maintained and stored database. No adjustments to assay data other than conversion from Li to Li20 and Ta to Ta2O5. Primary data capture by Maxwell LogChief and management by Maxwell DataShed. Assay data loaded directly from Laboratory supplied .csv files as are downhole and collar surveys. An independent data verification was completed as part of a 2021 Ni-43-101 filing by then competent person. Data exported from SQL database and verified by the CP. No adjustments are made to assay data. | |
Section 2: Reporting of Exploration Results
| Criteria | JORC Code explanation | Commentary |
| Mineral tenement and land tenure status |
| Mining Lease M74/244 was amalgamated and awarded on 04/08/2009 and is valid until 23/12/2030 and covers 1830 Ha. The project is subject to normal projects approvals processes as regulated by the WA Department of Mines, Industry and Regulation. The tenement is subject to the Standard Noongar Heritage agreement as executed 7 February 2018. The underlying land is a mixture of freehold property and vacant Crown land. The property Freehold title is held by Galaxy Resources or its child subsidiaries. |
| Exploration done by other parties |
| During the 1960's WMC carried out an extensive drilling program to define the extent of local spodumene bearing pegmatite. The WMC work led onto a further investigation into project feasibility. In 1989 Pancontinental Mining, Limited drilled 101 RC drill holes. In 1990 Pancontinental drilled a further 21 RC drill holes. In 1997 Greenstone Resources drilled 3 diamond holes and 38 RC holes, undertook soil sampling and metallurgical test work on bulk samples from the mine area. Haddington Resources Ltd in 2001 drilled 9 diamond holes for metallurgical test work and undertook further sterilization drilling. Galaxy acquired the M72/12 mining tenement from Sons of Gwalia administrators in 2006. |
| Geology |
| The Mount Catlin Project lies within the Ravensthorpe Suite, with host rocks comprising both the Annabelle Volcanics to the west, and the Manyutup Tonalite to the east. The contact between these rock types extends through the Project area. The Annabelle Volcanics at Mt Cattlin consist of intermediate to mafic volcanic rocks, comprising both pyroclastic material and lavas. The pegmatites which comprise the orebodies occurs as a series of sub- horizontal sills, hosted by both volcanic and intrusive rocks, interpreted as a series of westward verging thrusts. Typical coarse grained spodumene (grey green colour) from the NW pegmatite shown below. |
| Drill hole Information |
| Pre-2017 drilling reported 4 August 2015 by subsidiary GMM (ASX:GMM). Last prior resource and update was 28 November 2018 2019-2022 drill collars New resource development collar information is presented in Appendices below. Holes generally inclined between -75 to -80 degrees to determine true width or due to local infrastructure. |
| Data aggregation methods |
| Pre-2017 Data Where higher grade zones internal to broader intervals of lower grade mineralization were reported, these were noted as included intervals and italicized. 2019-2022 Drilling New results are reported to a 0.3% cut-of grade (below), minimum 4m width, maximum 1m internal dilution. Only drillholes incorporated into the resource model are reported. No metal equivalent values are used. |
| Relationship between mineralization widths and intercept lengths |
| All intersection grades have been reported previously as length weighted average grades using a 0.3% Li2O lower grade cut-off except where stated. Intersections were calculated allowing a maximum of 2m of internal dilution with no top-cut applied. Cutting of high grades is not required due to nature of the mineralization and grade distribution/estimation. The Mt Cattlin lithium and tantalum mineralization occurs as a thick horizontal to gently dipping pegmatite and generally lies 30 to 280m below the current topographic surface resulting in drill intercepts nearing true widths. All reported intersections in 2023 are approximate true widths. |
| Diagrams |
| Diagrams are included in the text above. |
| Balanced reporting |
| All significant intersections above 0.3% Li2O have been fully reported in previous releases. 2019-2022 Drilling Drill hole collars and relevant assay details are appended below. |
| Other substantive exploration data |
| Fe2O3 is modelled with Li and Ta to determine the effect of deleterious chemistry and mineralogy at or near pegmatite contacts and rafts of surrounding country rock with pegmatite. |
| Further work |
| Development and extraction of the NW Pit Mineral Resource and Reserve. Diagrams are illustrated in the text above. Feasibility study work to trade off open pit vs underground options. |
Section 3: Estimation and Reporting of Mineral Resources - Mt Cattlin
| Criteria | JORC Code explanation | Commentary |
| Database integrity |
| Pre-2017 At the time of the 2012 Mineral Resource estimates, Allkem had appointed a data administrator to manage and host the Mt Catlin database in a GBIS SQL database. Field data was entered into project-specific password-protected spread sheets with in-built auto-validation settings. The spread sheets were emailed to head office on a weekly basis and then passed on to the data administrator, where all data was subject to validation procedures and checks before being imported into the central database. Invalid data was not imported into the central database but was quarantined until corrected. Data exports were routinely sent from head office to site for visual validation using ArcGIS and Micromine. 2017 to Jan 2019 Database and data QAQC processes was re-established after review in 2016. The DataShed database was managed/maintained by Maxwell Geoservices and was validated externally to GXY and aggregated meta-data from site and the sample laboratory. The assay laboratory reported sample validation and checks on arrival. Database managers' reported both QAQC and validation checks monthly and upon request. Jan 2019 to Current Allkem have employed a Database Administrator who loads all data, manages the database and performs routine validations on all loaded data. All logging is undertaken on a Toughbook using the dedicated LogChief logging system matched to the Datashed database. Visual validation of drilling data versus the wireframes in Surpac software is undertaken routinely by Mine Geology and Exploration personnel. |
| Site visits |
| The reporting CP has completed several site visits since 2016. |
| Geological interpretation |
| The geological interpretation is considered robust due to the nature of the geology and mineralisation. Surface diamond and reverse circulation (RC) drillholes have been logged for lithology, structure, and alteration and mineralisation data. The lithological logging of pegmatite in combination with the Li2O, Fe2O3 and MgO assays, including grain size and mineralogical differentiation, have been used to guide the sectional interpretation of the pegmatites in Leapfrog Geo modelling software. The geological wireframes have then been used as a boundary within which internal, mineralisation wireframes have been generated in Leapfrog software using geology logging and assay data. The primary assumption is that the mineralisation is hosted within the fine-grained material within the pegmatite sills, which is considered robust. Weathering surfaces have been updated by Allkem Resources in Leapfrog Geo software for recently completed drillholes. Due to the consistent nature of the pegmatite identified in the area, no alternative interpretations have been considered. The pegmatites are found to be continuous over the area of the deposit. The Li2O% mineralisation interpretations are contained wholly within the pegmatite geological units. Evidence of late-stage faulting is present and has, where appropriate, been incorporated into the geological model. |
| Dimensions |
| The Mt Cattlin pegmatites strike north-south and are typically between 10 m and 30 m wide and are typically flat-lying or with a subtle dip east of around 5 to 10 degrees. Several different pegmatites have been identified, either as separate intrusions or due to fault offsets, over a strike length of 1,300 m, an across strike extent of 1,700 m and down to a depth of greater than 300 m below surface. Thirteen pegmatites have been identified to date in the NW and SW area. They range in extent from 50 m along strike and 50 m down-dip to 650 m along-strike and 500 m down-dip. The pegmatites range in thickness from a few metres to 20 m. |
| Estimation and modelling techniques |
| Grade estimation for Li2O%, Fe2O3% and Ta2O5 ppm has been completed using Ordinary Kriging (OK) into pegmatite domains using Datamine, Studio RM software. Grade estimation of Fe2O3% has been completed using OK into the encapsulating mafic waste and late-stage mafic dyke, which intersects the pegmatites. The geological, mineralisation and weathering wireframes generated have been used to define the domain codes by concatenating the three codes into one. The drillholes have been flagged with the domain code and composited using the domain code to segregate the data. Hard boundaries have been used at all domain boundaries for the grade estimation Pegmatite waste wireframing using <0.3% lithia and < 4% Na2O. Compositing has been undertaken within domain boundaries at 1m with a merge tolerance of 0.1 m. Top cuts for all elements have been assessed for all mineralised and un-mineralised pegmatite domains, as well as for the external waste and mafic dyke domains, with only those domains with extreme values having been top cut. The top cut levels have been determined using a combination of histograms, log probability and mean-variance plots. Two domains have been top cut for Li2O. Three domains have been top-cut for or Ta2O5 ppm and no top-cutting completed in Fe2O3%. Variography has been completed in Supervisor 8.14 software on an individual domain basis. Domains with too few samples have borrowed variography. No assumptions have been made regarding the recovery of any by-products. The drillhole data spacing ranges from 40 m by 40 m resource definition drillhole spacing out to an 80 m by 80 m exploration spacing. The block model parent block size is 20 m (X) by 20 m (Y) by 5 m (Z), which is considered appropriate for the dominant drillhole spacing used to define the deposit. A sub-block size of 2.5 m (X) by 2.5 m (Y) by 0.625 m (Z) has been used to define the mineralisation edges, with the estimation undertaken at the parent block scale.
Mining reconciliation data for the NW and SW regions is available. No selective mining units are assumed in this estimate. No correlation between variables has been assumed. |
| Moisture |
| Tonnes have been estimated on a dry basis. |
| Cut-off parameters |
| For the reporting of the Mineral Resource Estimate, a 0.4 Li2O% cut-off within a USD 1,100 Whittle pit shell has been used. |
| Mining factors or assumptions |
| A Whittle pit optimisation has been run at 1,100 USD in order to generate a pit shell wireframe for Mineral Resource reporting purposes and to meet the RPEEE reporting requirement. The mining assumptions/parameters applied to the optimisation are: • Mining Recovery - 93% • Mining Dilution - 17% • Li2O% Price/tonne 6% concentrate - USD$1,100 • Li2O% recovery - 75% • Ta2O5ppm Price/pound concentrate - USD$40 • Ta2O5ppm recovery - 25% • Transport and port Cost/tonne - AUD$49.68 • State Royalty - 5% • Processing Cost/tonne - AUD$33.16 • Mining Cost/tonne - AUD$4.29 USD exchange rate of 0.70 Li2O cut-off of 0.4% has been applied in the Whittle optimisation. Both Inferred and Indicated Mineral Resource classifications have been utilised in the RPEEE optimisation. |
| Metallurgical factors or assumptions |
| A Li2O% metallurgical recovery of 75% and Ta2O5 ppm recovery of 25% has been applied during the pit optimisation and generation of the RPEEE pit shell. |
| Environmental factors or assumptions |
| No environmental factors or assumptions have been incorporated into this Mineral Resource Estimate since Mt Cattlin is a producing operation with Environmental approvals and an Environmental Management Plan in place. |
| Bulk density |
| No additional bulk density data has been collected in the NW Area. As a consequence, the bulk density values determined in the previous MRE (Nov 2018) have been assigned to the block model. The bulk densities which have been assigned to the Mineral Resource block model by lithology and weathering state are: |
| Waste Lithologies | Oxide | 2.50 | ||
| Transitional | 2.70 | |||
| Fresh | 2.86 | |||
| Unmineralized Pegmatite | Oxide | 2.42 | ||
| Transitional | 2.62 | |||
| Fresh | 2.78 | |||
| Mineralised Pegmatite | Oxide | 2.47 | ||
| Transitional | 2.71 | |||
| Fresh | 2.72 |
| Classification |
| The resource classification has been applied to the MRE based on the drilling data spacing, grade and geological continuity, quality of the estimation and data integrity. The classification takes into account the relative contributions of geological and data quality and confidence, as well as grade confidence and continuity. Portions of the deposit which have been estimated in the first two estimation passes and which have been estimated with a high degree of confidence, with defined grade continuity, have been classified as Indicated Mineral Resources. Portions of the deposit that have been estimated and have a suitable level of drilling to assume geological continuity of the pegmatite have been classified as Inferred Mineral Resources. The classification reflects the view of the Competent Person. |
| Audits or reviews |
| This 2023 Mineral Resource estimate for Mt Cattlin has been peer reviewed and validated. Original outputs in Datamine/Studio have been translated into Dassault/Surpac for further development into regularised models for the development of diluted models. |
| Discussion of relative accuracy/ confidence |
| The relative accuracy of the Mineral Resource estimate is reflected in the reporting of the Mineral Resource as per the guidelines of the 2012 JORC Code. The remaining Measured, Indicated, and Inferred material from the NW and SW region have been considered in the mineral resource. The estimate is domained by identified pegmatite number and zoned by mineralised and un-mineralised subtypes using 0.3% lithia and Na2O < 4%. Estimates are thus local by domain. The same geological model and wireframes are used for grade control and mine planning in Dassault/Surpac Software. Regularized translations of the original Datamine Studio model are used in Dassault/Surpac re-blocked to 5 x 5 x 6.25m for short term mine planning and monthly reconciliations. Reconciliation is within tolerance for an "Indicated" resource. |
Appendix 2: New RC Drillhole collar details post 14 September 2022.
(Previous results released 5 October 2022 for 81 drillholes and 19,177metres)
| Hole ID | TYPE | MGA94 Z51 East | MGA94 Z51 North | RL | Depth | Dip | MGA94 Z51 Azimuth |
| NWRC115 | RC | 223,759 | 6,282,220 | 269.236 | 260 | -65.1 | 180 |
| NWRC127 | RC | 223,835 | 6,282,319 | 267.995 | 240 | -68.8 | 180 |
| NWRC133 | RC | 223,856 | 6,282,580 | 272.944 | 54 | -85.0 | 195 |
| NWRC133A | RC | 223,872 | 6,282,633 | 268.009 | 267 | -72.0 | 202 |
| NWRC135 | RC | 223,840 | 6,282,208 | 268.918 | 222 | -65.8 | 153 |
| NWRC136 | RC | 223,831 | 6,282,328 | 267.968 | 250 | -64.0 | 148 |
| NWRC139 | RC | 223,870 | 6,282,469 | 270.942 | 246 | -82.2 | 165 |
| NWRC140 | RC | 223,901 | 6,282,569 | 275.245 | 250 | -70.0 | 193 |
| NWRC141 | RC | 223,877 | 6,282,629 | 268.079 | 270 | -63.3 | 180 |
| NWRC143 | RC | 223,958 | 6,282,103 | 263.265 | 210 | -90.0 | 180 |
| NWRC144 | RC | 223,980 | 6,282,220 | 264.881 | 225 | -66.5 | 235 |
| NWRC145 | RC | 223,971 | 6,282,296 | 267.619 | 213 | -68.7 | 231 |
| NWRC146 | RC | 223,906 | 6,282,385 | 269.86 | 245 | -63.9 | 173 |
| NWRC150 | RC | 223,921 | 6,282,520 | 270.509 | 255 | -90.0 | 180 |
| NWRC152 | RC | 223,917 | 6,282,701 | 264.729 | 285 | -73.3 | 180 |
| NWRC159 | RC | 223,959 | 6,282,520 | 270.441 | 230 | -90.0 | 180 |
| NWRC160 | RC | 223,970 | 6,282,501 | 270.251 | 205 | -79.8 | 200 |
| NWRC161 | RC | 223,956 | 6,282,633 | 268.004 | 270 | -69.1 | 180 |
| NWRC163 | RC | 223,974 | 6,282,316 | 268.239 | 206 | -68.0 | 159 |
| NWRC169 | RC | 223,995 | 6,282,640 | 267.915 | 260 | -70.0 | 180 |
| NWRC173 | RC | 224,009 | 6,282,431 | 269.763 | 230 | -80.1 | 130 |
| NWRC177 | RC | 224,045 | 6,282,677 | 267.162 | 260 | -70.2 | 180 |
| NWRC178 | RC | 224,061 | 6,282,651 | 267.654 | 265 | -86.2 | 237 |
| NWRC180 | RC | 224,080 | 6,282,480 | 258.026 | 225 | -71.4 | 180 |
| NWRC183 | RC | 224,075 | 6,282,640 | 267.946 | 250 | -70.3 | 180 |
| NWRC184 | RC | 224,080 | 6,282,680 | 266.194 | 260 | -70.0 | 180 |
| NWRC185 | RC | 224,080 | 6,282,720 | 264.762 | 240 | -69.3 | 180 |
| NWRC187 | RC | 224,121 | 6,282,478 | 258.29 | 225 | -70.3 | 180 |
| NWRC193 | RC | 224,122 | 6,282,754 | 263.716 | 265 | -69.7 | 180 |
| NWRC194 | RC | 224,159 | 6,282,479 | 258.201 | 220 | -68.6 | 180 |
| NWRC206 | RC | 224,199 | 6,282,516 | 258.294 | 225 | -69.1 | 180 |
| NWRC217 | RC | 224,231 | 6,282,587 | 244.593 | 220 | -81.3 | 161 |
| NWRC218 | RC | 224,190 | 6,282,659 | 264.326 | 250 | -69.2 | 141 |
| NWRC221 | RC | 224,258 | 6,282,778 | 257.083 | 250 | -82.0 | 215 |
| NWRC222 | RC | 224,323 | 6,282,548 | 225.045 | 205 | -65.0 | 215 |
| NWRC228 | RC | 224,319 | 6,282,388 | 235.328 | 170 | -71.8 | 180 |
| NWRC229 | RC | 224,319 | 6,282,436 | 227.993 | 180 | -69.6 | 180 |
| NWRC230 | RC | 224,325 | 6,282,474 | 228.106 | 180 | -65.6 | 188 |
| NWRC231 | RC | 224,330 | 6,282,506 | 228.17 | 185 | -70.0 | 191 |
| NWRC232 | RC | 224,330 | 6,282,545 | 224.938 | 190 | -69.5 | 191 |
| NWRC237 | RC | 224,361 | 6,282,505 | 224.73 | 180 | -70.0 | 180 |
| NWRC239 | RC | 224,366 | 6,282,636 | 237.314 | 195 | -78.0 | 187 |
| NWRC243 | RC | 223,837 | 6,282,480 | 270.931 | 252 | -84.9 | 180 |
| NWRC245 | RC | 224,070 | 6,282,993 | 261.106 | 336 | -71.7 | 180 |
| NWRC246 | RC | 224,085 | 6,282,744 | 263.695 | 264 | -84.2 | 170 |
| NWRC247 | RC | 224,002 | 6,282,760 | 262.257 | 306 | -85.0 | 180 |
| NWRC248 | RC | 223,732 | 6,282,427 | 270.54 | 400 | -59.9 | 200 |
| NWRC249 | RC | 223,930 | 6,282,481 | 270.991 | 150 | -83.0 | 175 |
| NWRC250 | RC | 223,897 | 6,282,683 | 265.992 | 270 | -81.7 | 210 |
| NWRC251 | RC | 223,961 | 6,282,718 | 264.263 | 265 | -84.9 | 180 |
| NWRC252 | RC | 223,817 | 6,282,477 | 270.692 | 278 | -72.0 | 160 |
| SWRC089 | RC | 224,086 | 6,281915 | 260.05 | 305 | -90 | 000 |
Appendix 3: New Significant results upper pegmatite
| Hole_ID | Depth_From | Depth_To | Interval Width | Li2O% | Ta2O5ppm |
| NWRC145 | 127 | 132 | 5 | 0.83 | 219.02 |
| NWRC167 | 148 | 152 | 4 | 1.41 | 63 |
| NWRC177 | 175 | 181 | 6 | 1.08 | 54.95 |
| NWRC180 | 114 | 119 | 5 | 1.92 | 75.07 |
| NWRC187 | 104 | 108 | 4 | 2.26 | 52.87 |
| NWRC193 | 186 | 190 | 4 | 0.65 | 44.69 |
| NWRC194 | 101 | 110 | 9 | 1.8 | 83.3 |
| NWRC195 | 113 | 117 | 4 | 2.23 | 78.69 |
| NWRC205 | 98 | 112 | 14 | 1.59 | 209.66 |
| NWRC206 | 99 | 112 | 13 | 1.87 | 71.25 |
| NWRC213 | 100 | 113 | 13 | 1.83 | 190.75 |
| NWRC214 | 102 | 117 | 15 | 1.71 | 157.15 |
| NWRC215 | 113 | 125 | 12 | 1.47 | 108.45 |
| NWRC217 | 113 | 119 | 6 | 2.1 | 68.93 |
| NWRC218 | 156 | 163 | 7 | 0.82 | 81.49 |
| NWRC219 | 174 | 180 | 6 | 1.97 | 105.78 |
| NWRC222 | 72 | 77 | 5 | 1.27 | 54.53 |
| NWRC225 | 137 | 142 | 5 | 1.14 | 84.35 |
| NWRC228 | 58 | 73 | 15 | 1.24 | 94.07 |
| NWRC229 | 53 | 67 | 14 | 2.02 | 52.13 |
| NWRC230 | 58 | 76 | 18 | 1.42 | 89.74 |
| NWRC231 | 64 | 78 | 14 | 1.72 | 94.73 |
| NWRC232 | 68 | 77 | 9 | 1.02 | 121.82 |
| NWRC233 | 133 | 140 | 7 | 1.32 | 67.22 |
| NWRC237 | 66 | 83 | 17 | 1.46 | 86.89 |
| NWRC239 | 106 | 115 | 9 | 1.32 | 90.39 |
| NWRC240 | 152 | 157 | 5 | 1.58 | 53.04 |
| NWRC246 | 196 | 202 | 6 | 0.98 | 40.2 |
Appendix 4: Significant new results lower pegmatite
| Hole_ID | Depth_From (m) | Depth_To (m) | Width (m) | Li2O% | Ta2O5ppm |
| NWRC116 | 231 | 236 | 5 | 1.94 | 143.69 |
| NWRC117 | 265 | 270 | 5 | 1.19 | 242.39 |
| NWRC122 | 236 | 240 | 4 | 0.95 | 76.62 |
| NWRC126 | 203 | 210 | 7 | 2.7 | 123.29 |
| NWRC132 | 234 | 240 | 6 | 2.03 | 216.77 |
| NWRC133A | 235 | 241 | 6 | 1.92 | 239.38 |
| NWRC134 | 255 | 259 | 4 | 1.93 | 93.68 |
| NWRC139 | 224 | 234 | 10 | 1.2 | 232.01 |
| NWRC140 | 235 | 249 | 14 | 2.31 | 125.66 |
| NWRC141 | 245 | 256 | 11 | 2.56 | 196.91 |
| NWRC142 | 234 | 244 | 10 | 1.91 | 255.95 |
| NWRC145 | 199 | 208 | 9 | 0.73 | 170.83 |
| NWRC146 | 207 | 216 | 9 | 2 | 352.25 |
| NWRC150 | 214 | 227 | 13 | 1.96 | 164.32 |
| NWRC151 | 230 | 238 | 8 | 2.4 | 132.26 |
| NWRC152 | 231 | 240 | 9 | 1.93 | 208.61 |
| NWRC159 | 209 | 222 | 13 | 2.08 | 77.57 |
| NWRC161 | 226 | 238 | 12 | 1.61 | 268.32 |
| NWRC162 | 232 | 245 | 13 | 2.2 | 585.54 |
| NWRC163 | 160 | 168 | 8 | 1.26 | 113.54 |
| NWRC167 | 211 | 223 | 12 | 3.04 | 154.24 |
| NWRC168 | 217 | 232 | 15 | 1.86 | 89.7 |
| NWRC169 | 224 | 236 | 12 | 2.39 | 154.24 |
| NWRC171 | 228 | 238 | 10 | 0.98 | 125.56 |
| NWRC177 | 235 | 249 | 14 | 1.47 | 192.38 |
| NWRC178 | 230 | 240 | 10 | 1.15 | 331.71 |
| NWRC180 | 181 | 188 | 7 | 1.83 | 132.08 |
| NWRC181 | 212 | 221 | 9 | 1.11 | 282.55 |
| NWRC183 | 221 | 232 | 11 | 1.71 | 235.99 |
| NWRC184 | 227 | 234 | 7 | 1.39 | 216.57 |
| NWRC187 | 186 | 197 | 11 | 1.56 | 248.7 |
| NWRC193 | 233 | 242 | 9 | 1.68 | 493.19 |
| NWRC194 | 189 | 199 | 10 | 2.08 | 515.15 |
| NWRC195 | 193 | 207 | 14 | 1.26 | 264.11 |
| NWRC196 | 196 | 211 | 15 | 0.86 | 191.54 |
| NWRC197 | 204 | 216 | 12 | 1.32 | 79.17 |
| NWRC202 | 246 | 257 | 11 | 1.01 | 482.63 |
| NWRC205 | 190 | 197 | 7 | 1.53 | 115.19 |
| NWRC206 | 188 | 199 | 11 | 1.5 | 146.88 |
| NWRC208 | 223 | 232 | 9 | 2.07 | 133.43 |
| NWRC209 | 241 | 245 | 4 | 0.93 | 133.09 |
| NWRC213 | 186 | 192 | 6 | 0.68 | 100.81 |
| NWRC215 | 201 | 208 | 7 | 0.85 | 71.93 |
| NWRC217 | 186 | 192 | 6 | 0.97 | 77.29 |
| NWRC219 | 232 | 238 | 6 | 1.22 | 199.61 |
| NWRC224 | 131 | 142 | 11 | 1.37 | 38.87 |
| NWRC225 | 200 | 205 | 5 | 0.75 | 76.75 |
| NWRC227 | 228 | 233 | 5 | 0.98 | 90.35 |
| NWRC228 | 149 | 154 | 5 | 0.57 | 97.8 |
| NWRC229 | 143 | 152 | 9 | 0.81 | 85.12 |
| NWRC230 | 144 | 156 | 12 | 0.62 | 75.68 |
| NWRC231 | 154 | 162 | 8 | 0.97 | 72.7 |
| NWRC232 | 157 | 162 | 5 | 1.11 | 60.27 |
| NWRC233 | 199 | 203 | 4 | 1.09 | 80.68 |
| NWRC237 | 147 | 153 | 6 | 1.62 | 73.67 |
| NWRC242 | 221 | 231 | 10 | 1.76 | 281 |
| NWRC243 | 236 | 245 | 9 | 1.05 | 176.04 |
| NWRC246 | 244 | 254 | 10 | 2.17 | 224.9 |
| NWRC247 | 223 | 230 | 7 | 0.68 | 326.36 |
| NWRC252 | 244 | 252 | 8 | 0.98 | 130.3 |