Announcement PDF ASX AN N OU N C EMEN T 21 January 2025 Yinnetharra Operational & Metallurgical test work update Highlights: • The Yinnetharra Lithium Project is an exploration project covering a substantial 1,769km2 within the Gascoyne Lithium Province of Western Australia  • Mineral Resource Estimate (MRE) of 25.7Mt @ 1% Li 2O and 62ppm Ta2O5 reported at the Malinda Prospect in December 20231 Highlights from the last round of resource definition at Malinda in this round of results include2:  22.6m @ 2.16% Li2O from 310m in YRRD126 at M36  32.4m @ 1.01% Li2O from 50m in YDPT012 at M47  32m @ 0.93% Li2O from 280m in YDRD066 at M1  15m @ 1.5% Li2O from 19m in YDRD716 at M69  22m @ 1.13% Li2O from 24m in YDRD717 at M69 • Feasibility Level Metallurgy test work has been completed on the M1 deposit at the Malinda Prospect • The test work comprised of testing over 40 composite samples over 110 batch and 4 locked cycle flotation tests and a 3.5 tonne pilot plant • M1 Metallurgical results indicate high grade spodumene concentrates can be produced at a high recovery rate with very low impurities through Whole of Ore Flotation (WOF):  • Spodumene concentrate of 5.5% - 6.0% Li2O at 69.2% - 81.8% recovery rate Test work has supported the development of a Whole of Ore Flowsheet Delta Lithium Limited (ASX: DLI) (“Delta” or the “Company”), is pleased to provide an operational update on its 100% owned Yinnetharra Project. The Company has received assays and compiled results for the last round of resource definition drilling, as well as updates on the Metallurgical test work program on the M1 pegmatite and has progressed with approvals. Commenting on the project Managing Director, James Croser said; “The final infill drill results from the 2024 drill program at Yinnetharra continued to deliver high-grade lithium over large intervals. These results will inform a pending resource update at Yinnetharra, primarily increasing resource confidence at Malinda. Importantly the team has identified the emergence of a larger halo of contiguous tantalum at Malinda, which has the potential to contribute revenue to a future mining scenario via modest flowsheet additions. The M1 pegmatite at Malinda was the primary focus of this round of metallurgical testwork as it carries the majority of the resource tonnes and informs the first years of potential mine life at Malinda. The program has realised highly positive metallurgical results, with pilot plant spodumene recoveries exceeding our 1 2 Ref er ASX Announcement 27 December 2023 titled “Yinnetharra Lithium Project Maiden Mineral Resource Estimate” Ref er to Appendix 3 f or f ull drill hole inf ormation ASX AN N OU N C EMEN T 21 January 2025 internal financial modelling and proving the whole-of-ore flotation flowsheet as suitable for the M1 mineralogy. The current work program is focused on continuing to secure key approvals including heritage, environmental and developmental work across the broader Yinnetharra project and will be ongoing throughout the year.” Yinnetharra Lithium Project The Yinnetharra project is in the Gascoyne region of Western Australia targeting lithium mineralisation. Delta Lithium has 1,769km2 of tenure owned outright and as Farm-in Joint Ventures. A maiden MRE was released in December 2023 of 25.7Mt @ 1% Li2O. Farm-In Joint Venture Agreements have expanded the prospective stratigraphy to over 80km in length of the Leakes Springs metasediment package. Figure 1: Location of Yinnetharra Project. Lithium resources at Malinda are largely present in three main pegmatites, the M1, M36 and M47 with smaller resources at M42, M20, M67 & M69. Mineralisation extends from surface to a depth of >300m. Importantly, in conjunction with ongoing resource definition drilling at Malinda, during CY2024 Delta commenced work on two key material modifying factors for the Project, focused on Geotechnical Studies and Metallurgical Studies. The results of the Metallurgical Studies as well details of the exploration and development activities are summarised below. 2 ASX AN N OU N C EMEN T 21 January 2025 Exploration At Yinnetharra, field teams have remobilised to site following the Christmas break to continue with soil sampling and geological mapping activities, to generate first-pass drill targets across the entire prospective tenement package. Heritage surveys are scheduled to recommence in April, and once clearances are received, drilling activities are anticipated to recommence. The most recent drilling program for Yinnetharra was completed in the December Quarter. This program was focused on resource conversion (inferred to indicated) at the Malinda prospect, some regional exploration as well as core sample collection for Metallurgical and Geotechnical Studies at the M1 deposit, which contains the majority of the current Mineral Resource at Yinnetharra3. Highlights from this round of resource definition at Malinda include4:  22.6m @ 2.16% Li2O from 310m in YRRD126 at M36  32.4m @ 1.01% Li2O from 50m in YDPT012 at M47  32m @ 0.93% Li2O from 280m in YDRD066 at M1  15m @ 1.5% Li2O from 19m in YDRD716 at M69  22m @ 1.13% Li2O from 24m in YDRD717 at M69 Figure 2: Malinda Plan view showing selected recent drilling results. 3 Ref er ASX Announcement 27 December 2023 titled “Yinnetharra Lithium Project Maiden Mineral Resource Estimate” 4 Ref er to Appendix 3 f or f ull drill hole inf ormation 3 ASX AN N OU N C EMEN T 21 January 2025 As part of the regional exploration campaign, targets on the Farm-In Joint Venture tenements with Reach Resources were tested at Caribou and Talisker. Initial first pass surface programs were also conducted on the Dalaroo/Lyons River project area. No significant intercepts were identified at these regional targets within these first pass programs. Full details of the drilling can be found in Appendix 1. Regional mapping, geochemistry sampling and target generation continue across the tenement package with two exploration field teams based at Yinnetharra. Yinnetharra M1 Metallurgical test work Program Overview The Metallurgical test work program was developed through collaboration of Delta technical geological staff, contractor Primero engaged to provide Metallurgical technical support and test work management. Test work was completed by Nagrom, in Kelmscott, Western Australia. The aim of the Yinnetharra test work has been to provide suitable level of information to support feasibility level studies and detailed engineering design, including developing appropriate process flowsheet to produce a 5.5% Li2O spodumene concentrate from the M1 deposit. The extensive testwork was conducted from May 2023 to January 2025. The program has been guided by the mineralogy of the Malinda deposits and industry benchmarks, as well as utilisation of contemporary industry knowledge from recently developed projects. The test work has focussed on generating a reliable dataset to confidently support future project development and provide a sound basis for economic assessment. Key phases of the testwork included: • Sighter Testing o Sighter flotation and Heavy Liquid Separation (HLS) tests on the first M1 & M47 drill core and outcrop rock chips. o Flotation results showed good grades and recoveries could be achieved, however HLS recovery was low due to pervasive fine spodumene and was discarded at this stage as a viable recovery method. M47 lithia recoveries also presented with a significant mica percentage in the pre-float stage. • Low Grade Variability Testing o Sighter flotation tests with composite grades 0.5% to 1% Li 2O were generated from M1 ore, designed to be lower than the average Malinda resource grade, and thus provide confidence that the conventional WOF approach would be appropriate for treating lower grade material that is realistically expected to be produced from mining activities along with high-grade ore. o Results were positive and supported progressing to detailed testing. • Feasibility Level Testing o Comprehensive comminution, mineralogy, variability, flowsheet development and supporting testwork to provide data for engineering design. Figure 3: Timeline of testwork phases. To date, over 40 composites have been developed and tested during the program. Two large composites were generated for bulk flowsheet development work and Pilot plant operations, the remaining composites 4 ASX AN N OU N C EMEN T 21 January 2025 were developed to assess variability within the Malinda ore bodies. In total, over 5 tonnes of diamond core was compiled for the various test programs described here. Sighter testwork (refer ASX announcement 21 August 2023 “Yinnetharra Initial Metallurgical Results and Drilling Update”) indicated that a Whole of Ore Flotation (WOF) flowsheet was the most appropriate for the Malinda Project. The test program went on to confirm the sighter results and develop the WOF flowsheet further. Over 110 batch flotation tests have been conducted on Malinda ore samples to date. The majority of the batch testing was flowsheet development work to lock down key flowsheet equipment, number of stages, order of operations, and operational parameters. The final batch flowsheet was then applied for variability testing and used as base for the locked cycle and pilot plant flowsheets. Mineralogy The Malinda prospect consists of several pegmatite deposits, and the initial focus of this testwork program is the M1 deposit, as the largest and contributing 16Mt to the current 25.7Mt resource. Similar metallurgical investigation of the M47 and M36 deposits is currently underway. Quantitative mineralogy and liberation analysis of composite samples was conducted using TESCAN Integrated Mineral Analyzer (TIMA). The M1 mineralogy is relatively homogeneous with spodumene being the primary lithium bearing mineral. Texturally the pegmatite is fine grained relative to typical pegmatites. Grade variation is consistent and there are no clear textural or mineralogical differences to locate domain boundaries. Consequently, the M1 domains have been developed as a function of spatial location and depth. Notably, the mineralised pegmatite in M1 is most often surrounded by a skin of unmineralised pegmatite, thus the impact of host rock dilution during mining is expected to be minimal. The M47 and M36 pegmatite mineralogies are considerably more variable than M1. The notable difference is that the M36 and M47 contain along with spodumene, significant and varying amounts of lepidolite and in some cases amblygonite. M47 is primarily lepidolite dominant, with minor amblygonite and spodumene. M36 ranges from lepidolite dominant to spodumene dominant, to equal mixtures, while also containing minor amounts of amblygonite. Two primary host rock types are present in the Malinda deposits, a mafic schist, and a biotite altered amphibolite. Waste rock characterisation study results are pending to support waste dump design. Testwork Composites The composites generated over the course of the program can be grouped into the following: 1. Sighter composites – the first diamond drill holes and outcrop rock chips from early Yinnetharra exploration. 2. Low Grade Variability composites – composites developed prior to detailed metallurgy testing, to represent the lower grade range of ore that occurs at Yinnetharra, and to validate that conventional processing methods were applicable for <1% Li2O ore. 3. Bulk composite – a large volume composite designed to represent the median ore properties of the M1 deposit, to be used for flowsheet development and bulk testing requirements. 4. Variability composites: a. Geometallurgical Domain (GMD) composites - intervals selected from domain specific drill holes, to represent the specific domains in the ore bodies aiming to capture the expected variability of ore within the M1, M47 and M36 deposits. In some cases where insufficient 5 ASX AN N OU N C EMEN T 21 January 2025 mass was available from a single drill hole or for other reasons, intervals from more than one drill hole were combined to create representative material. b. Host Rock Dilution variability composites – were selected to represent specific levels of mining dilution from the two common host rock types present in Yinnetharra deposits. These were developed by combining pure host rock at controlled ratios to the Bulk composite to mimic different levels of mining dilution. c. Production variability composites – were developed to represent time periods expected to represent the early stages of the M1 mine plan. This enabled finer resolution of potential ore variability during the critical early stages of the project. 5. Pilot Plant feed composite – a composite of approximately 3.5 tonnes was developed to represent the median ore properties of the M1 deposit, similar to the Bulk composite, for the purpose of pilot plant operation. Table 1 shows a summary of the composites. Figure 4 shows plan views of the domains within M1 deposit and drill holes used to make the composites are marked showing the locations within each domain. Composite Drill Holes Bulk Comp YDRD011, 13, 14, 15, 17, 18, 19 M1GMD1 M1GMD2 M1GMD3 M1GMD4 M1GMD5 M1GMD6 M1GMD7 M1GMD8 Dilution Comp 1 5% XCB Dilution Comp 2 10% XCB Dilution Comp 3 15% XCB Dilution Comp 4 5% XAM Dilution Comp 5 10% XAM Dilution Comp 6 15% XAM Intervals Li2O % Fe2O3 % 1.0 0.4 1.2 1.0 1.1 1.3 1.1 1.2 1.1 1.3 0.3 0.3 0.2 0.3 0.3 0.3 0.4 0.3 YDRD053 YRDR675 YDRD052 YRRD627 YRRD679 YRRD618 YDRD058 YDGT002 YDRD011 126-136m, YDRD013 153-180m, YDRD014 59-92m, YDRD015 32-70m, YDRD017 145-197m, YDRD018 116-205m, YDRD019 183-220m. 89.0-99.4m 141.0-152.2m 82.4-99.0m 192.9-199.3m 88.9-92.5m, 98.0-101.3m 155.8-171.0m 143.4-150m 209.0-232.0m - Developed from Bulk Comp and Host Rock XCB 0.9 0.8 - Developed from Bulk Comp and Host Rock XCB 1.0 1.3 - Developed from Bulk Comp and Host Rock XCB 0.9 1.8 - Developed from Bulk Comp and Host Rock XAM 1.0 1.1 - Developed from Bulk Comp and Host Rock XAM 0.9 1.7 - Developed from Bulk Comp and Host Rock XAM 0.9 2.5 1.0 0.4 0.2 0.3 8.3 14.3 Pilot Comp YDPT001, 2, 3,4, 5, 6 Host Rock XCB Host Rock XAM YDPT004 YDPT001 YDPT001 22.7-51.0m, YDPT002 36.0-59.1m, YDPT003 56.9-83.1m, YDPT004 84.3-155.1m, 157.1-169.1m, YDPT005 32.5-67.5m, 91.0-136.1m, 153.2-189.1m, YDPT006 124.1-160.1m, 173.0-194.2m, 198.0-203.1m, 210.0-219m. 187.8-189.5m 51.8-53.5m Table 1: Summary of the composites tested. 6 ASX AN N OU N C EMEN T 21 January 2025 Figure 4: Long section showing M1 Geomet Domains. Note domains 9 & 10 were not composited as part of this stage of works. Flowsheet Development Batch testing focused on flowsheet development, aiming to finalise key equipment, stage count, sequence of operations, and operating parameters. The finalised batch flowsheet was subsequently used for variability testing and provided the basis for locked cycle and pilot plant flowsheets. Flowsheet development prioritised developing a flowsheet for M1 ore processing. Work has included: • • • • • • • • Comminution testing was conducted on 29 separate Malinda variability composites, providing sufficient data for detailed crushing and milling circuit process design. Heavy Liquid Separation (HLS) was conducted at various crush sizes, and poor response ruled out (Dense Media Separation) DMS for inclusion in the Malinda flowsheet. Whole of Ore flotation flowsheet became the focus for subsequent flowsheet development. Grind size optimisation on M1 ore showed a product P80 180µm maximised global recovery. Wet High Intensity Magnetic Separation (WHIMS) stage was included to mitigate impacts of potential host rock dilution. Mica removal was required for M1 ore due to the significant abundance of muscovite. Mica preflotation provided the best selectivity compared to alternative flowsheets. Flotation collector and reagent screening was conducted and confirmed robust reagent selection and dose regime. Water chemistry investigations highlighted unique water quality requirements which were incorporated into the flowsheet. Flowsheet development is currently underway to identify potential flowsheet modifications required for M36 and M47 processing. Variability Testing Variability testing to date is limited to M1 variability composites, and Host Rock Dilution composites. Variability testing on M36 and M47 has commenced and is currently underway. 7 ASX AN N OU N C EMEN T 21 January 2025 Figure 5 shows the grade recovery curve for the M1 variability composites and summary in Table 2. • Flotation results have indicated that all M1 domains can produce spodumene concentrate grades above 5.5% Li2O as per Figure 5. • Domains 4, 5 and 7 were found to have finer grained mineralogy than other M1 domains, and further optimisation is underway. Table 2 shows the results for the Host Rock Dilution composites. • Host rock dilution variability testing has been completed, indicating the primary mafic schist host rock (XCB) has negligible impact on the spodumene flotation performance (Dilution 1-3). • Results of dilution of biotite altered amphibolite (XAM) dilution showed 5% XAM (Dilution 4) impacts spodumene concentrate grade with iron grades exceeding typical customer specifications. (Dilution 4-6). These results will guide mining practices around areas of host rock contact. Test VF93 VF94 VF95 VF96 VF97 VF98 VF99 VF100 VF108 VF109 VF110 VF111 VF112 VF113 Head Feed Mags & Slimes Mica Con Spodumene Con Grade Grade Recovery Grade Recovery Grade Recovery % Li2 O % Fe2 O3 % Li2O %, Li2O % Li2O %, Li2O % Li2O % Fe2 O3 %, Li2 O M1GMD1 1.2 0.3 0.7 4.8 0.4 4.3 6.6 0.4 86.5 M1GMD2 1.0 0.3 0.6 6.0 0.4 5.4 6.3 0.4 74.9 M1GMD3 1.1 0.2 0.8 6.3 0.4 3.2 5.8 0.4 86.5 M1GMD4 1.3 0.3 0.9 7.5 0.6 5.1 5.7 0.4 78.4 M1GMD5 1.1 0.3 0.9 8.2 0.5 5.4 5.7 0.5 68.0 M1GMD6 1.2 0.3 0.9 8.1 0.5 6.0 5.9 0.5 81.3 M1GMD7 1.1 0.4 0.9 7.6 0.6 9.5 5.9 0.5 69.2 M1GMD8 1.3 0.3 0.9 7.2 0.5 7.1 5.8 0.4 82.2 Dilution 1 0.9 0.8 0.5 3.9 0.4 8.4 5.6 0.6 83.9 Dilution 2 1.0 1.3 0.5 4.4 0.4 9.0 6.3 0.9 81.2 Dilution 3 0.9 1.8 0.4 4.0 0.4 8.6 5.6 0.8 82.8 Dilution 4 1.0 1.1 0.5 4.5 0.5 7.3 5.5 1.6 83.3 Dilution 5 0.9 1.7 0.5 4.4 0.5 6.8 5.6 2.7 76.6 Dilution 6 0.9 2.5 0.5 4.9 0.5 6.8 5.0 3.9 74.9 Table 2: Key variability test results. *Recovery figures are global recovery, in respect to process plant feed. Composite Figure 5: Lithium grade recovery curve for M1 geometallurgical domain spodumene stage flotation results. *Stage recovery refers to recovery with respect to the spodumene flotation feed. It does not account for upstream losses of slimes, magnetic separation and losses to the mica concentrate. 8 ASX AN N OU N C EMEN T 21 January 2025 Bulk Float A 60kg bulk batch flotation test was conducted to generate sample for environmental tailings characterisation and dynamic thickener and filtration testing. Locked Cycle Tests Locked cycle testing can achieve a representation of steady state processing through iterative cycles, where middlings streams generated from one batch flotation test are then added into successive flotation cycles to simulate the recycle stream of a continuous process. The tests are then repeated several times to simulate a steady state. Locked cycle flotation testing offers a bench scale method to quantify impacts of internal recycle streams within flotation circuits, including recycled process water. A key risk of the Yinnetharra flowsheet is the potential residual reagents from the upstream mica preflotation circuit impacting the spodumene flotation stage. The mica flotation stage is a relatively novel addition to a conventional spodumene operation, and Delta understands there are currently no operating benchmarks for reference. Four locked cycle tests were conducted, to isolate different parameters in the flowsheet. The tests achieved steady state after 12 cycles, and the results highlighted a requirement to separate the process water circuits between the mica preflotation and spodumene flotation stages. This change was incorporated into the pilot plant flowsheet. Pilot Plant The purpose of the pilot plant was to validate flotation performance using equipment more representative of full-scale operations. The primary objective was to confirm the scalability of flotation equipment and assess potential performance impacts from dynamic factors that cannot be accurately captured by batchscale testing. Figure 6: Operating the spodumene circuit. 9 ASX AN N OU N C EMEN T 21 January 2025 The pilot plant flowsheet used the split process water circuits identified as a requirement during locked cycle testing. During operation, early results lead to modifying the pilot plant flowsheet with the addition of a scavenger stage to improve spodumene recovery. The pilot processed 3.5 tonnes of material with the flotation circuit processing 120kg/h feed rate. Operation consisted of a decoupled approach with unit operations grouped and operated in stages with suitable hold points between each stage. The purpose was to reduce operational risks from potential reliability issues and ensure maximum technical resources were available to support operation of each stage. The pilot plant produced a spodumene concentrate grade of 5.7% Li2O at a global recovery of 69%. Supporting Testwork Dynamic thickener testing was conducted on tailings generated from bulk batch flotation, by Metso - Perth Technology Centre. Metso also conducted vacuum filtration testing of concentrates. The tests generated data suitable for equipment sizing and selection. Bulk materials characterisation was conducted, with the results to inform design and engineering of materials handling equipment. Tailings characterisation testing on M1 tailings material have returned benign results. Testwork Results Table 3 shows summary of key flotation results of the test program. The batch test represents the final flowsheet development test. The locked cycle built upon the batch flowsheet and the pilot operated the same flowsheet continuously at a pilot scale. It should be noted that the Batch test reported below used water sourced from Yinnetharra site reverse osmosis (RO) water treatment plant for the flotation stage. The reasoning is that a similar water treatment method would be required to treat water for the Yinnetharra process plant. The Locked Cycle test also used site RO water for the first cycle. The pilot plant used Perth tap water, as water chemistry analysis showed the two waters had near identical qualities. Batch flotation tests also confirmed the two waters similar performance, and hence using Perth tap water for the pilot was considered a satisfactory alternative. Delta is assuming a conservative M1 lithium recovery of 65% for future modelling purposes. Grades Units Batch Locked Cycle Pilot Plant Feed Grade %Li2O 1.0 1.0 1.0 Concentrate Grade %Li2O 6.0 5.5 5.7 Deslime Losses Mags Losses Mica Prefloat Losses Spodumene Float Losses %, Li2O %, Li2O %, Li2O %, Li2O 3.9 3.4 6.4 4.6 3.9 3.4 9.9 6.5 4.2 2.8 6.1 17.7 Global Recovery %, Li2O 81.8 76.4 69.2 Recovery Breakdown Table 3: High level testwork results 10 ASX AN N OU N C EMEN T 21 January 2025 Summary of key comminution results is shown in Table 4. Values are 85th percentiles. Parameter Crushing Work Index Bond Ball Work Index Bond Rod Work Index Abrasion Index Specific Gravity Units Value kWh/t 11.3 kWh/t 16.6 kWh/t 8.4 0.2 t/m3 2.75 CWi BBWi BRWi Ai SG Notes Close screen 125µm Close screen 1,180µm - Table 4: Summary of key M1 comminution test results. Process Plant Flowsheet The comminution circuit consists of a three-stage crush and ball mill (3CB). Milled product will be classified by a cyclone with an overflow P80 180µm. The overflow the reports to deslime cyclones cutting at D 50 15µm. The slimes report to tailings thickener while the deslimes underflow reports to Low Intensity Magnetic Separation (LIMS) for grinding iron removal, and then on to the Tantalum recovery circuit. Tantalum circuit recovers tantalum through gravity separation using spirals and wet shaker tables. Following tantalum removal, the material passes through a Wet High Intensity Magnetic Separator (WHIMS), with mags reporting to the tailings thickener and the non-mags continuing to the mica flotation circuit for conditioning and recovery of mica. The mica concentrate reports to the mica thickener and onto tailings. Mica flotation tails is dewatered prior to spodumene conditioning and flotation. Spodumene concentrate is thickened and filtered then stockpiled. Spodumene flotation tailings report to the tailings thickener before being pumped to the tailings storage facility. Tantalum Preliminary sighter test work also demonstrates a value-add opportunity to recovery tantalum and an updated tantalum Resource Estimate is being prepared for Malinda. Sighter testwork on a portion of the M1 bulk composite has shown a wet 2% Ta 2O5 concentrate can be produced, and dry upgrading can produce a 12% Ta 2O5 concentrate at approximately 50% recovery. Head Feed Parameter Total Composite Grade Bulk Comp (% Ta2O5) 0.0070 Rougher Grade Stage Rec (% Ta2O5) 0.109 54.7 Scavenger Grade Stage Rec (% Ta2O5) 0.041 10.2 Cleaner Grade Stage Rec Total Wet Grade Stage Rec (% Ta2O5) (% Ta2O5) 2.3 2.3 89.4 53.0 Mag Sep Grade Total Dry Recovery (% Ta2O5) 11.9 Grade Stage Rec (% Ta2O5) 95.3 11.9 50.5 Table 5: Tantalum Sighter testwork results. These first pass tantalum results are encouraging, and further optimisations are being investigated. 11 ASX AN N OU N C EMEN T 21 January 2025 Figure 7: Malinda processing flowsheet. Approvals and Project Development Recent Heritage surveys have recorded several Aboriginal Sites in prospective areas which are expected to require detailed follow up prior to exploration drilling in the vicinity. The Mining Lease application has been submitted for the Malinda Mining Area (Figure 8) and Native Title negotiations have commenced. Environmental permitting will continue to advance and Delta will provide an update on the likely permitting route once meetings with Regulators have been held in the March Quarter. 12 ASX AN N OU N C EMEN T 21 January 2025 Figure 8: Plan View to submitted Mining Lease application. Water reconnaissance activities will continue, with a seismic survey being planned for the March Quarter to further define the boundaries of nearby paleochannels. Next Steps • • • • • Ramp up of 2025 field program across Delta’s wider Yinnetharra tenement package to delineate drill targets Updated Yinnetharra Lithium Mineral Resource Estimate in addition to a wider Tantalum resource outside the current lithium wireframes Heritage planning to focus commencement of surveys in April, including Native Title Agreement negotiations regarding Mining Lease approvals at Malinda Finalise receipt of geotechnical mining study and waste characterisation results for Malinda Continue with investigations into M36 and M47 mining and metallurgy Release authorised by the Managing Director on behalf of the Board of Delta Lithium Limited. For further information, please contact: Delta Lithium James Croser, Managing Director Peter Gilford, CFO & Company Secretary +61 8 6109 0104 info@deltalithium.com.au Investor/Media Enquiries Sodali & Co Michael Weir +61 402 347 032 13 ASX AN N OU N C EMEN T 21 January 2025 About Delta Lithium Delta Lithium (ASX: DLI) is an exploration and development company f ocused on bringing high-quality, lithium-bearing pegmatite deposits, located in Western Australia, into production. With current global JORC compliant resources of 40.4Mt@1.1%Li2O, strong balance sheet and an experienced team driving the exploration and development workstreams, Delta Lithium is rapidly advancing its Projects. The Mt Ida Project has coincident gold and lithium orebodies and holds a critical advantage over other developers with existing Mining Leases an d an approved Mining Proposal. Delta Lithium is pursuing a development pathway to unlock maximum value f or shareholders. Delta is currently drilling to extend the high-grade gold resources at Mt Ida. Delta Lithium also holds the highly prospective Yinnetharra Lithium Project, with exciting lithium discoveries at the Malinda and Jamesons prospects. The Company is currently conducting exploration activities at Yinnetharra with f ieldwork commenced f or 2025 across our large tenure package, testing additional targets and aiming to build on the Maiden Resource at Malinda. Competent Person's Statement Inf ormation in this Announcement that relates to exploration results is based upon work undertaken by Mr. Shane Murray, a Competent Person who is a Member of the Australasian Institute of Geoscientists (AIG). Mr. Murray has suf f icient experience that is relevant to the style of mineralisation and type of deposit under consideration and to the activity which he is undertaking to qualif y as a ‘Competent Person’ as def ined in the 2012 Edition of the ‘Australasian Code f or Repo rting of Exploration Results, Mineral Resources and Ore Reserves’ (JORC Code). Mr. Murray is an employee of Delta Lithium Limited and consents to the inclusion in this announcement of the matters based on his inf orm ation in the f orm and context in which it appears. Inf ormation in this Announcement that relates to metallurgical testwork is based upon work undertaken by Mr. Kuyan Laplanche, a Competent Person who is a Member of the Australasian Institute of Mining and Metallurgy (AusIMM). Mr. Laplanche has suf f icient experien ce that is relevant to the style of mineralisation and type of deposit under consideration and to the activity which he is undertaking to qualif y as a ‘Competent Person’ as def ined in the 2012 Edition of the ‘Australasian Code f or Reporting . Mr. Laplanche is a f ormer employee of Primero and a current employee of Delta Lithium Limited and consents to the inclusion in this announc