Announcement PDF Level 9, 2 Mill Street Perth WA 6000 T 61 8 8317 1700 E info@corelithium.com.au ABN 80 146 287 809 ASX CXO 16 October 2023 ASX: CXO Announcement Mineral Resource at BP33 increased to 89% Measured and Indicated Highlights • BP33 infill drilling results have led to in an increase in the proportions of the Measured and Indicated categories to 9.36Mt, 89% of the total Mineral Resource Estimate (from 6.94Mt). • These increases in Measured and Indicated Mineral Resource, with the resultant increase in geological confidence, can now be considered for conversion to the BP33 Ore Reserves. • Infill drilling completed as part of a resource definition program has also led to an increase in the average grade of the Mineral Resource Estimate at BP33 from 10.1Mt @ 1.48% Li2O1 to 10.5Mt @ 1.53% Li2O2. • The Mineral Resource Estimate and Ore Reserve Estimate will inform the mine design used for the updated feasibility study that is currently underway. Australian lithium miner, Core Lithium Ltd is pleased to announce an upgrade to Mineral Resource Estimate (MRE) at BP33, a key deposit for the Finniss Lithium Operation (Finniss) in the Northern Territory. BP33 is the second proposed mine at Finniss with the early works program and updated feasibility study currently underway. As part of the feasibility study resource definition drilling at BP33 in 2023 has led to an increase in the Mineral Resource tonnage and grade from 10.1Mt @ 1.48% Li2O to 10.5Mt @ 1.53% Li2O (Table 1, Figure 1). Results were recently received from 4 drillholes targeting infill positions, with the aim of increasing the proportion of Measured and Indicated resources within the existing BP33 orebody (Figure 1). The drilling results are in line with expectations, confirming the continuity in grade and thickness of the modelled mineralisation domains. The BP33 mineralisation remains open down plunge. Importantly, there is now 9.36Mt of the Mineral Resource, at 1.52% Li2O, up from 6.94Mt at 1.50% Li2O within the Measured and Indicated categories. This represents 89% of the total current Mineral Resource Estimate and a 35% increase on the previous estimate. These increases in the Measured and Indicated categories can now be considered for conversion into Ore Reserves for BP33. Modelling is underway that will use this to inform a revision of the mine plan as part of the BP33 Feasibility Study. 1 BP33 Mineral Resource more than Doubled, 6 March 2023 2 See Table 1 corelithium.com.au 1 Core Lithium CEO Gareth Manderson said: “Increasing the confidence in the BP33 resource is a significant step in the progress of the feasibility study and supports the development of the BP33 mine plan.” “These results, which include a higher proportion of the Measured and Indicated Resource category can now be considered for conversion to BP33 Reserves.” “The early works program and the construction of the covered box cut is progressing well. We remain on schedule to make a Final Investment Decision for BP33 in early 2024.” Table 1. BP33 Mineral Resource Estimate summary October 2023 BP33 Mineral Resource Estimate Oct 2023 – 0.5% Li2O cut-off Resource Category Tonnes (Mt) Li2O % Li2O Contained metal (kt) Measured 2.85 1.44 41 Indicated 6.51 1.55 101 Inferred 1.14 1.59 18 Total 10.5 1.53 160 Note: Totals within this table are subject to rounding. Table 2. BP33 Mineral Resource Estimate summary February 2023 BP33 Mineral Resource Estimate Feb 2023 – 0.5% Li2O cut-off Resource Category Tonnes (Mt) Li2O % Li2O Contained metal (kt) Measured 2.85 1.46 42 Indicated 4.09 1.53 63 Inferred 3.17 1.45 46 Total 10.1 1.48 151 Note: Totals within this table are subject to rounding. corelithium.com.au 2 BP33 Final Drilling Results Throughout 2023, a deep infill diamond drilling program was undertaken at BP33 to provide confidence in the grade and geological continuity of the mineralisation at depth. This program resulted in significant intersections of mineralised pegmatite that were in line with expectations. Significant intersections from the diamond drilling are shown below with full drill hole data included in Table 3 below. - 33m @ 1.74% Li2O from 554m and 32m @ 1.74% Li2O from 593m in NMRD070 including: • 6m @ 2.12% Li2O from 568m • 3m @ 2.69% Li2O from 593m • 10m @ 2.01% Li2O from 613m - 44m @ 1.173% Li2O from 709m in NMRD071 including: • 9m @ 2.29% Li2O from 728m • 3m @ 3.57% Li2O from 750m BP33 Long section February 2023 BP33 Long section October 2023 Figure 1 – Long sectional view of BP33 resource block model – February 2023 LHS, October 2023 RHS The BP33 Mineral Resource Estimate represents the update that will inform the mine design used for the updated feasibility study that is currently underway. corelithium.com.au 3 This announcement has been approved for release by the Board of Core Lithium Ltd. For further information please contact: Natalie Worley Investor Relations Core Lithium Ltd +61 (0) 409 210 462 nworley@corelithium.com.au For Media queries: Gerard McArtney Account Manager Cannings Purple +61 487 934 880 gmcartney@canningspurple.com.au About Core Lithium Core Lithium Ltd (ASX: CXO) (Core or Company) is an Australian hard-rock lithium mining company that owns and operates the Finniss Lithium Operation on the Cox Peninsula, south-west and 88km by sealed road from the Darwin Port, Northern Territory. Core’s vision is to generate sustained value for shareholders from critical minerals exploration and mining projects underpinned by strong environmental, safety and social standards. For further information about Core and its projects, visit www.corelithium.com.au. Competent Persons Statement The information in this report that relates to Exploration Results and Mineral Resources is based on information compiled by Dr Graeme McDonald (BSc(Hons)Geol, PhD) who is a full time employee of Core Lithium Ltd and a member of the Australasian Institute of Mining and Metallurgy and is bound by and follows the Institute’s codes and recommended practices. He has sufficient experience which is relevant to the styles of mineralisation and types of deposits under consideration and to the activities being undertaken to qualify as a Competent Person as defined in the 2012 Edition of the “Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves”. Dr. McDonald consents to the inclusion in the report of the matters based on this information in the form and context in which it appears. Core confirms that it is not aware of any new information or data that materially affects the results included in this announcement and that all material assumptions and technical parameters underpinning the Mineral Resource previously released as “BP33 Mineral Resource more than Doubled” on 6 March 2023 continue to apply and have not materially changed. corelithium.com.au 4 Table 3. Summary of final drill hole data and received assay results from exploration activities at the BP33 Project Hole ID NMRD067 NMRD068 NMRD070 NMRD071 Prospect BP33 BP33 BP33 BP33 corelithium.com.au Drill Type Easting (m) Northing (m) Dip Azimuth Total Depth (m) From (m) To (m) Interval (m) Grade (Li2O%) DD 694081 8593258 -65.32 89.94 756.7 729.0 739.0 10.0 1.22 Incl 729.0 732.0 3.0 1.84 690.3 616.0 636.0 20.0 1.41 Incl 618.0 624.0 6.0 2.38 855.74 554.0 587.0 33.0 1.74 Incl 568.0 574.0 6.0 2.12 Incl 578.0 581.0 3.0 2.31 and 593.0 625.0 32.0 1.74 Incl 593.0 596.0 3.0 2.69 Incl 613.0 623.0 10.0 2.01 774.0 709.0 753.0 44.0 1.73 Incl 728.0 737.0 9.0 2.29 Incl 750.0 753.0 3.0 3.57 DD DD DD 694153 694729 694694 8593222 8593315 8593278 -68.09 -65.47 -72.21 88.44 290.25 273.43 5 Summary of Mineral Resource Estimate Reporting Criteria As per ASX Listing Rules 5.8 and the 2012 JORC reporting guidelines, a summary of the material information used to estimate the Mineral Resource is detailed below. Geology and geological interpretation The Lithium Deposits at the Finniss Lithium operation are hosted within rare element pegmatites of the broader Bynoe pegmatite field. The Bynoe Pegmatite Field is situated 15km south of Darwin and extends for up to 55km in length and 10 km in width. The pegmatites are predominantly hosted within the early Proterozoic metasedimentary lithologies of the Burrell Creek Formation and are usually conformable to the regional schistosity. The Bynoe pegmatites are classified as LCT (Lithium-Caesium-Tantalum) type and are believed to have been derived from the ~ 1845 Ma S-Type Two Sisters Granite which outcrops to the west. Mineralisation at BP33 is hosted within a dominant, large, sub vertical pegmatite body and a smaller sill like body on the northwestern side. Fresh pegmatite is composed of coarse-grained spodumene, quartz, albite, microcline and muscovite. Spodumene is the predominant lithium bearing phase. The BP33 pegmatite is interpreted to be approximately 350m in strike length and up to approximately 40m in true width. There is a very strong steep southerly plunge component with a depth extent currently in excess of 800m. In the north the body strikes towards 045˚ and dips steeply to the east. Approximately halfway along the body to the south the strike changes to due south and the body dips steeply to the west. The pegmatite body also thins in a southerly direction and the average grade of the mineralisation also decreases to the south. Sampling and sub-sampling Pegmatite samples from RC drilling typically weighed 2-5kg and were collected on average over a 1m interval. RC samples were homogenised and subsampled by cone splitting at the drill rig. Drill core was collected directly into trays, marked up by metre marks and secured as the drilling progressed. Core was cut firstly into half longitudinally along a consistent line, ensuring no bias in the cutting plane. Again, without bias, half core was then cut into two further segments. Depending on the hole, a half or quarter was then collected on a metre basis where possible but not less than 0.3m in length, determined by geological and lithological contacts. The majority of diamond core was sampled via half core. Drilling techniques and hole spacing Reverse circulation (RC) and diamond core (DDH) drill techniques have been employed across the Finniss Lithium Project. RC Drilling was typically carried out with a 5 or 5.5 inch face-sampling bit. DDH drilling used a triple tube HQ technique with core usually oriented via a HQ core orientation tool. Diamond holes were either drilled from surface or utilised Mud Rotary or RC precollars with diamond tails. Most holes have been drilled at angles of between 55 - 85° and approximately perpendicular to the strike of the pegmatite. Geological and assay data for all drill holes was used in the geological interpretation and MRE’s with the exception of a single hole (FRC102) that was identified as being unreliable due to difficulties encountered whilst drilling. Drillhole spacing varies within and for each deposit, reflecting the maturity and variability. At BP33, a drill spacing of approximately 20m by 20m is indicative of Measured resources. Spacing increases for areas of Indicated mineral resources and for Inferred mineral resources a drill hole spacing in the range of 150m, supported by a strong down plunge component, has been used. corelithium.com.au 6 Sample analysis method RC samples were sent to North Australian Laboratories (NAL) in Pine Creek and more recently to Intertek (NTEL) in Darwin. DD samples were sent to either NAL, Intertek (Darwin) or Nagrom (Perth) for preparation and analysis. All samples underwent very similar sample preparation and analysis methods. The samples were sorted and dried. Primary preparation involved crushing the whole sample. The samples were split to obtain a sub-fraction which has then been pulverised to 95% passing 100µm. A sub-sample of the pulp was digested in a standard 4 acid mixture and analysed via ICP-MS and ICP-OES methods for the following elements: Li, Cs, Rb, Sr, Nb, Sn, Ta, U, As, K, P and Fe. For the 2016-2017 drilling, all samples were analysed via the fusion method - a sub-sample was fused with a Sodium Peroxide Fusion flux and digested. ICP-OES was used for the analysis of the Li, P and Fe. Exhaustive checks of this data suggested an excellent correlation existed, therefore between 2018 and 2021, a 3000 ppm Li trigger was set to process that sample via the fusion method. Since 2022, all samples have been processed at Intertek (NTEL) in Darwin via a Sodium Peroxide Fusion method in a Ni crucible with an ICPMS/OES finish for the following elements: Li, Al, B, Ba, Be, Ca, Cs, Fe, K, Mg, Mn, Nb, P, Rb, S, Sn, Sr, Ta, W, and As. Selected drill core samples were also analysed for the following to provide a broader suite: Al, Ca, Mg, Mn, Si, LOI, SG (immersion), SG (pycnometer) and various trace elements. Standards, blanks and duplicates have all been applied in the QAQC methodology. Sufficient accuracy and precision have been established for the type of mineralisation encountered and is appropriate for QAQC in the Resource Estimation. For the drilling undertaken by Liontown (Liontown Resources Ltd (ASX:LTR)), a sub-sample of the pulp was assayed by sodium peroxide fusion ICPMS using method codes ME-ICP89 (K, Li, P) and ME-MS91 (Cs, Nb, Rb, Sn, Ta) at ALS in Perth. Estimation methodology Geology and mineralisation wireframes were generated in Micromine (V 2022.5) software using drill hole data from an Access database maintained by Core. Resource data was flagged with unique lithology and mineralisation domain codes as defined by the wireframes and composited to 1m lengths. For the updated model at BP33, block model interpolation was undertaken using Ordinary Kriging (OK) and sub blocks were estimated at the parent block scale. Grade continuity analysis for Li2O was undertaken using Micromine software for the mineralised domains and models were generated in all three directions. These individual parameters were subsequently used in the block model estimation for each deposit. At BP33, a block model with a parent block size of 5 x 10 x 10m with sub-blocks of 1.25 x 2.5 x 2.5m has been used to adequately represent the mineralised volume. A review of the bulk density data was undertaken as part of this MRE update. Specific gravity (SG) determinations have been undertaken at NAL and Nagrom laboratories as well as by Core exploration personnel at its facilities in Berry Springs. Density data is consistent with expected values for fresh pegmatitic material. At BP33, where a significant amount of diamond drill core and data exists, a positive correlation between mineralised lithium grade and sample density was established. Specific Gravity (SG) is estimated into the block model via a Li2O based regression equation, using the block grade estimates. Cut-off grades The current Mineral Resource Inventory for BP33 has been reported at a cut-off grade of 0.5% Li2O. This is reflective of the current positive environment around lithium pricing and the increased prospects for eventual economic extraction. Due to the robust nature and continuity of the mineralisation, supported by a relatively flat grade tonnage curve, changes in cut-off grade has little material impact on the Mineral Resource Estimate. The cut-off grade contemplates all costs associated with the processing and selling of a Li2O concentrate product and are all easily paid for by the 0.5% Li2O cut-off. No top cuts were warranted or applied. corelithium.com.au 7 Classification criteria The resource classification has been applied to the updated Mineral Resource Estimate based on the drilling data spacing, grade and geological continuity, and data integrity. Measured Mineral Resources have been defined at BP33. Measured Mineral Resources are in areas supported by high data density and excellent geological and grade continuity. These areas could support detailed mine planning activities and are predominantly blocks populated during the first interpolation run. Indicated Mineral Resources have been defined at BP33. This is in areas that have a lower level of data density and/or lower confidence in the geological and grade continuity. However, enough confidence remains to be able to support the application of modifying factors to support mine planning and the evaluation of economic viability. Inferred Mineral Resources at BP33 have been identified in the deeper parts of the resources and/or in areas with low data density and lower levels of confidence in the geology, mineralisation, and resource estimation. The classifications reflect the view of the Competent Persons. Mining Method Selection The mining method currently under consideration for the BP33 deposit is long hole open stoping with backfill. The ore body width, vertical orientation, and competent host rock ground conditions allows this to be considered as a suitable mining method. It is assumed that a contract mining company will be used, and their equipment hire fleet would be utilised. Mining Infrastructure required to support the mine plan has been considered, including waste rock dumps, ROM pad, haul roads, crusher and processing plant, tailings storage facility, explosives storage facility, water storage, workshops and other buildings required for a contract mining operation. Processing Method Current Lithium ore processing at Grants comprises a gravity method called dense media separation (DMS) of generally the 0.5mm to 6.3mm fraction after P100 crushing to 6.3mm. The rejects are stockpiled for possible future use. The minus 0.5mm fines are placed in a purpose-built tailings storage facility (TSF). It is anticipated that the mineralisation from BP33 will be processed at the Grants facility. Detailed metallurgical studies of the BP33 ore are continuing and will inform the feasibility study that is currently underway. Eventual Economic Extraction It is the view of the Competent Person that at the time of estimation there are no known issues that could materially impact on the eventual extraction of the Mineral Resource. corelithium.com.au 8 JORC Code, 2012 Edition – Table 1 Report Section 1 Sampling Techniques and Data (Criteria in this section apply to all succeeding sections) CRITERIA JORC CODE EXPLANATION COMMENTARY SAMPLING TECHNIQUES • Drilling geology, assays and resource estimation results reported herein relate to reverse circulation (RC) and diamond drillhole (DDH) drilling employed by Core Lithium Ltd (CXO) and Liontown Resources Ltd (LTR) at BP33, over the period late 2016 to mid 2023 (refer to “Drill hole information” section below). • • • 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. Include reference to measures taken to ensure sample representivity and the appropriate calibration of any measurement tools or systems used. Aspects of the determination of mineralisation that are Material to the Public Report. In cases where ‘industry standard’ work has been done this would be relatively simple (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. RC drill spoils over all programs were collected into two sub-samples: • • 1 metre split sample homogenised and cone split at the cyclone into 12x18 inch calico bags. Weighing 2-5 kg, or 15% of the original sample. 20-40 kg primary sample, which for CXO’s drilling was collected in 600x900mm green plastic bags and retained until assays had been returned and deemed reliable for reporting purposes. In the case of LTR’s drilling, this primary sample was laid out directly on the ground in rows, without using a green bag. RC sampling of pegmatite for CXO assaying was done on a 1 metre basis. Sampling continued into the barren wallzone adjacent to the pegmatite for up to 4m. LTR’s RC samples were homogenised by riffle splitting prior to sampling and then assayed as 2m composites (collected via a scoop from the sample piles) with 2-3kg submitted for assay. If a composite sample returned a significant result (typically >0.5% Li2O) then the original individual metre intervals were also submitted for assay. Drill core was collected directly into trays, marked up by metre marks and secured as the drilling progressed. Geological logging and sample interval selection took place soon after. DDH Core was transported to a local core preparation facility where geological logging and sample interval selection took place. Core was cut into half longitudinally along a consistent line between 0.3m and 1m in length, ensuring no bias in the cutting plane. DDH sampling of pegmatite for assays is done over the sub-1m intervals described above. 1m-sampling continued into the barren phyllite host rock. DRILLING TECHNIQUES • corelithium.com.au Drill type (e.g., core, reverse circulation, open-hole hammer, RC Drilling was carried out with 5 to 5.5 inch face-sampling bit. 9 CRITERIA DRILL SAMPLE RECOVERY JORC CODE EXPLANATION • • • COMMENTARY rotary air blast, auger, Bangka, sonic, etc) and details (e.g. core diameter, triple or standard tube, depth of diamond tails, facesampling bit or other type, whether core is oriented and if so, by what method, etc). DDH drilling used a triple tube HQ technique. Core was oriented using a Reflex HQ core orientation tool. Method of recording and assessing core and chip sample recoveries and results assessed. Measures taken to maximise sample recovery and ensure representative nature of the samples. Whether a relationship exists between sample recovery and grade and whether sample bias may have occurred due to preferential loss/gain of fine/coarse material. RC drill recoveries were visually estimated from volume of sample recovered. The majority of sample recoveries reported were dry and above 90% of expected. Diamond Core Drilling (DDH) was undertaken using standard HQ core assembly (triple tube), drilling muds or water as required, and a wireline setup. Holes were either cored from surface or precollared by mud rotary down to rigid bedrock (~60m) or by RC down to a depth just above the target pegmatite. RC samples were visually checked for recovery, moisture and contamination and notes made in the logs. The rigs splitter was emptied between 1m samples. A gate mechanism on the cyclone was used to prevent intermingling between metre intervals. The cyclone and splitter were also regularly cleaned by opening the doors, visually checking, and if build-up of material was noted, the equipment cleaned with either compressed air or highpressure water. Drill collars are sealed to prevent sample loss and holes are normally drilled dry to prevent poor recoveries and contamination caused by water ingress. Wet intervals are noted in case of unusual results. DDH core recoveries were measured using conventional procedures utilising the driller’s markers and estimates of core loss, followed by mark up and measuring of recovered core by the geologist or geotechnician. DDH core recovery is 100% in the pegmatite zones and in fresh host-rock. Studies have shown that there is no sample bias due to preferential loss/gain of the fine or coarse material. LOGGING • • • Whether core and chip samples have been geologically and geotechnically logged to a level of detail to support appropriate Mineral Resource estimation, mining studies and metallurgical studies. Whether logging is qualitative or quantitative in nature. Core (or costean, channel, etc) photography. The total length and percentage of the relevant intersections logged. Detailed geological logging was carried out on all RC and DDH drill holes. The geological data is suitable for inclusion in a Mineral Resource Estimate (MRE). Logging recorded lithology, mineralogy, mineralisation, weathering, colour, and other sample features. RC chips are stored in plastic RC chip trays. DDH core is stored in plastic core trays. All holes were logged in full, including RC precollars. Mud rotary precollars were only logged if weathered pegmatite was expected. Pegmatite sections are also checked under a UV light for spodumene identification on an ad hoc basis. This provides indicative qualitative information. corelithium.com.au 10 CRITERIA JORC CODE EXPLANATION COMMENTARY RC chip trays and DDH core trays are photographed and stored on the CXO server. Geotechnical logging was carried out on the oriented DDH core. Selected holes were also logged using downhole tools, collecting a variety of information for geotechnical purposes. SUBSAMPLING 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 insitu 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. The majority of the mineralised samples were collected dry, as noted in the drill logs and database. The field sample preparation for CXO drilling involved collection of RC samples from the cone splitter on the drill rig into a calico bag for dispatch to the laboratory. LTR samples were collected as 1m riffle split samples from the rig into calico bags. Composite samples were obtained via a scoop from the primary piles on the ground. The sample sizes are considered more than adequate to ensure that there are no particle size effects relating to the grain size of the mineralisation. Quarter or Half Drill Core sample intervals were constrained by geology, alteration or structural boundaries, intervals varied between a minimum of 0.3 metres to a maximum of 1 m. The core is cut along a regular Ori line to ensure no sampling bias. A field duplicate sample regime is used to monitor sampling methodology and homogeneity of RC drilling at Finniss. The typical procedure was to collect Duplicates via a spear of the green RC bag, having collected the Original in a calico bag. Throughout 2022, all duplicates were collected as original splits directly from the cyclone. The duplicates cover a wide range of Lithium values. Results of duplicate analysis show an acceptable degree of correlation given the heterogeneous nature of the pegmatite and the two methodologies used to derive the laboratory sample. Sample preparation CXO drilling Prior to 2022, sample prep occurred at North Australian Laboratories (“NAL”), Pine Creek (NT) Some DDH sample prep also occurred at Nagrom Laboratory in Perth (WA). Since 2022, sample prep occurred at Intertek (NTEL) In Darwin. DDH samples are crushed to a nominal size to fit into mills, approximately -2mm. RC samples do not require any crushing, as they are largely pulp already. corelithium.com.au 11 CRITERIA JORC CODE EXPLANATION COMMENTARY A 1-2 kg riffle-split of RC Samples are then prepared by pulverising to 95% passing -100 um. In 2017, CXO’s samples were pulverised in a Kegormill. In mid-2017, Steel Ring Mills were installed at NAL to reduce the iron contamination that was recognised in the 2017 Drilling program. LTR drilling Sample prep occurred at ALS in Perth (WA). RC Samples were rifle split to a max of 3kg and then prepared by pulverising to 85% passing -75 um. This took place in an LM5 ring mill. 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. CXO drilling Prior to 2022, sample analysis for RC and routine DDH samples occurred at North Australian Laboratories, Pine Creek, NT. Since 2022, sample analysis occurred at Intertek (NTEL) In Darwin. At NAL, a 0.3 g sub-sample of the pulp is digested in a standard 4 acid mixture and analysed via ICP-MS and ICPOES methods for the following elements: Li, Cs, Rb, Sr, Nb, Sn, Ta, U, As, K, P, S and Fe. The lower and upper detection range for Li by this method is 1 ppm to 5000 ppm. A 3000 ppm Li trigger was set to process that sample via a fusion method. The fusion method was - a 0.3 g subsample is fused with 1g of Sodium Peroxide Fusion flux and then digested in 10% hydrochloric acid. ICP-OES is used for the following elements: Li, P and Fe. The lower and upper detection range for Li by this method are 10 ppm to 20,000 ppm. Since 2022, all samples have been processed at Intertek (NTEL) in Darwin via a Sodium Peroxide Fusion method in a Ni crucible with an ICPMS/OES finish for the following elements: Li, Al, B, Ba, Be, Ca, Cs, Fe, K, Mg, Mn, Nb, P, Rb, S, Sn, Sr, Ta, W, and As. Selected drillholes were also assayed for a