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Pursuit Minerals Ltd (ASX: PUR) (“PUR”, “Pursuit” or the “Company”) is pleased to provide the following update on its maiden Stage 1 Drilling Program with the commencement of drill hole 1 (“DDH-1”) on the Maria Magdelena tenement.
- Drillhole 1 or DDH-1 currently in progress at the Maria Magdelena tenement of the Rio Grande Sur Project.
- Drill hole expected to reach 500-600m+ in depth with results expected over the coming months.
- Stage 1 Drill Program currently underway to target resource growth to the existing inferred JORC resource of 251.3kt LCE @ 351mg/Li1.
- Geophysical surveys shows high conductivity zones, highly prospective for lithium brines to depths of 250-500m which is below the current resource DDH-1 is in close proximity to historical shallow drill holes which yielded average grades of 395mg/Li and 391mg/Li in the first 50m.
Drill Hole 1 Underway
The first drill hole of the Stage 1 drilling programme has now commenced on site at the Rio Grande Sur Project with the finalisation of the project camp installation and setup.
Figure 1 – Drill rig loading onto platforms and commencing DDH-1 following arrival to site.
The establishment of Pursuit’s operational camp at the RGS project is now complete, with a full drilling crew in place along with representatives from SRK Argentina managing and overseeing the drilling program.
The establishment of the camp was a difficult process given the adverse weather conditions faced over the past weeks since the commencement of works with road closures and significant rain. However, despite these challenges Pursuit’s local team was able to complete the setup with minimal delays.
Figure 2 – DDH-1 drilling in progress
Each hole is anticipated to take approximately one month to complete, with the drilling expected to reach depths of 500-600m below the surface, significantly deeper than the existing defined JORC mineral resource depth. Pursuit is targeting a material resource upgrade in 2024 which will build on the recent maiden resource defined at the Rio Grande Sur Project.1
DDH-1 is in close proximity to historical drilling carried out by ADY Resources in 2011 and later audited and re-explored by LSC Lithium Inc in 2018. The drill holes RG-17 and RG-18 yielded results of 395mg/Li and 391mg/Li with the holes drilled to a depth of 50.9m below the surface.
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Pursuit Minerals
Overview
Pursuit Minerals Ltd. (ASX:PUR) is a top-tier lithium exploration and development company. The company is focused on its flagship Rio Grande Sur lithium project in the Salta Province of Argentina. The project is strategically located in an area known as the Lithium Triangle which hosts 50 percent of the global lithium resources and 40 percent of the current global lithium production. Argentina is the world’s third largest producer of lithium, behind Australia and Chile.
The project spans an area of 9,260 hectares on the Rio Grande Salar and is adjacent to several operating lithium mines and development operations, including Acradium Lithium’s Fenix lithium mine and the Olaroz lithium mine. The Rio Grande Salar holds a historical Ni 43-101 resource declared by LSC Lithium, formerly listed on the TSX prior to being acquired by Plus Petrol of 2.1 million tons (Mt) of lithium carbonate equivalent (LCE) with an average grade of 370 milligrams per litre (mg/L). This resource was mostly obtained from shallow drilling to 100 metres.
Pursuit delivered a maiden JORC Inferred Mineral Resource Estimate (MRE) of 251.3 kt LCE at 351 mg/L at the Rio Grande Sur project. The inferred resource relies on recent geophysical surveys and historical drilling, encompassing only a small portion of the known mineralization. Notably, excluding the highly promising Mito tenement from the current MRE highlights the unexplored potential for further resource expansion.
Pursuit has commenced its Stage 1 maiden drill program focused on upgrading the inferred resource. The drilling is anticipated to reach depths of 500 to 600 metres below surface, significantly deeper than the existing defined JORC mineral resource depth. Other companies in the region have obtained impressive results and grades of 900 mg/Li+ at depths of 500 metres, some of the highest known grades in Argentina. Pursuit expects a material resource upgrade in the second half of 2024 which will build on the inferred maiden resource.
Drill cores and packer lithium brine samples from Pursuit’s Stage 1 drilling program at the Rio Grande Sur Project.
In addition to having an attractive lithium resource, Pursuit is focused on the production of lithium carbonate to meet the supply side response to growing lithium demand. Recently, the company announced the first phase of operations of its 250 tons per annum (tpa) pilot plant to produce lithium carbonate. The plant will generate both technical and battery grade lithium carbonate at a purity of 99.95 percent, employing a conventional evaporation process.
Pursuit has submitted advanced environmental permits for the construction of the 250 tpa evaporation ponds and Stage 2 drill program at the northern tenement of the Rio Grande Sur project.
The establishment of the ponds is expected to take place in the latter part of 2024, pending environmental approvals. The ponds and the plant are planned to be situated on the Sal Rio 02 tenement enabling the possibility of initiating the first production of lithium carbonate on-site in 2025.
Pursuit is targeting continuous production at Rio Grande Salar and expects the current setup to be scalable to produce 15,000 to 20,000tpa of technical and battery grade lithium carbonate.
250-ton lithium carbonate pilot plant
The company’s focus on Argentina has several advantages. The new government, led by its president Javier Milei has signaled a market-friendly and pro-business policy shift. This should be a positive development for lithium miners given that Argentina has one of the largest lithium reserves in the world. Argentina holds 21 percent of the world’s 105 million tons of lithium resources, second only to Bolivia, according to the United States Geological Survey’s Lithium Statistics and Information 2024 report.
Lithium is in great demand driven by the growth in electric vehicles (EVs). Bloomberg NEF estimates lithium demand to jump by 225 percent to 2.6 Mt of LCE by 2030, translating into a CAGR of 16 percent. In a net-zero scenario, Bloomberg pegs the demand at 3.6 Mt of LCE by 2030, a CAGR of 19 percent.
The company remains focused on project execution that will deliver long-term shareholder value, including the completion of stage 1 drilling, JORC resource upgrade, first production of lithium carbonate and increasing production capacity to 250 tpa, and receipt of environmental permits, all within the first half of 2024.
In addition, Pursuit has identified the following catalysts over the next 12 months:
- Q3/Q4 2024: start of evaporation pond construction at Rio Grande, off-take agreement, relocation of 250 tpa pilot plant to Rio Grande.
- Q4 2024/Q1 2025: Detailed mineral resource study for commercial scale lithium carbonate operation; stage 2 drilling and JORC resource upgrade; first production from 250 tpa plant could commence as early as Q4 of 2025.
Company Highlights
- Pursuit Minerals is an ASX-listed company focused on advancing a pre-production lithium brine operation in Argentina.
- The company’s flagship Rio Grande Sur project covers 9,233 hectares on the Rio Grande Salar, in the Salta Province of Argentina located in the Lithium Triangle. The region is home to 50 percent of global lithium resources and 40 percent of world production.
- The acreage owned by Pursuit is situated within an Ni 43-101 inferred resource of 2.1 million metric tons of lithium carbonate equivalent (LCE), with an average grade of 370 milligrams per litre (mg/L) extending to a depth of 100 metres.
- Pursuit delivered a maiden JORC Inferred Mineral Resource Estimate (MRE) of 251.3 kt LCE at 351 mg/L at the Rio Grande Sur Project. With its current Stage 1 drilling program currently underway, Pursuit is targeting a material resource upgrade in the second quarter of 2024, which will build on the recent inferred maiden resource.
- The company has commenced the first phase of operations to produce lithium carbonate at its recently commissioned pilot plant, which is expected to achieve an operational capacity of 250 tons per annum (tpa). This is a significant milestone in the journey to advance toward the first production at Rio Grande Sur.
- Despite temporary fluctuations in lithium carbonate prices, the market continues to demonstrate resilience, with long-term projections indicating a significant 225 percent surge to reach 2.6 million tons of LCE worldwide by 2030.
Key Project
Rio Grande Sur Lithium Project
The Rio Grande Sur is the company’s flagship lithium project. The project comprises five tenements that span 9,233 hectares and are located in Rio Grande Salar in Salta province, Argentina. The region has benefited from historical exploration that yielded an NI 43-101 resource of 2.19 Mt LCE @ 374 mg/L, at inferred category.
During Q4 2023, Pursuit announced a maiden JORC inferred mineral resource estimate of 251.3 kt LCE at 351 mg/L at the Rio Grande Sur project. Following this, Pursuit is currently undertaking a maiden drill program to upgrade the inferred resource. Stage 1 of the drill program will comprise four diamond drill holes on the southern tenements. The first two holes will be drilled at the Sal Rio II and Maria Magdelena tenements.
The drilling is anticipated to reach depths of 500 to 600 metres below surface, significantly deeper than the existing defined JORC mineral resource depth. The drilling commenced in Q1 2024, and Pursuit is targeting a material resource upgrade in the second quarter of 2024. Further drilling is expected following the completion of the Stage 1 program. The Stage 2 drilling program is anticipated to occur in the second half of 2024, after which Pursuit is targeting a feasibility study.
Management Team
Aaron Revelle – Chief Executive Officer
Aaron Revelle is a seasoned mining executive with experience in founding and developing natural resources companies. He has over 15 years of experience across a wide range of commodities and bringing them from deposits into production. He was the founder of Trilogy Minerals, which was acquired by Pursuit, and Centaur Resources, which focused on its flagship Pastos Grandes lithium project and was sold to Arena Minerals, and subsequently sold to Lithium Americas for over AU$300 million.
Peter Wall - Chairman
Peter Wall is a partner with Steinepreis Paganin, a leading law firm, and has rich experience in M&A, takeovers, recapitalizations, and reconstructions. He has significant expertise in various domains such as energy, resources, capital markets, and strategy. He is also the chairman of Minbos Resources.
Tom Eadie – Non-Executive Director
Tom Eadie is a director on the company board. He has over four decades of rich experience in the resource industry. Currently, he is the chairman of Alderan Resources and Southern Cross Gold. He was also the founding chairman of Syrah Resources.
Vito Interlandi – Company Secretary
Vito Interlandi is the managing partner at Nexia Melbourne and is responsible for corporate advisory. He has two decades of experience in finance, accounting, and capital markets and has served on the boards of several public and private companies.
This profile was written in collaboration with Couloir Capital.
DLE Pilot Plant First Stage Production Completed, Downstream Process Optimised with Sample of Battery-Grade Lithium Produced
Highlights:
- An initial volume of 88m3 of concentrated eluate, which is the lithium carbonate equivalent (LCE) of approx. one tonne, has been produced from the Company´s DLE pilot plant in Copiapó, Chile over an operating period of 384 hours with 14 cycles completed
- This completes the first stage of production from the DLE pilot plant
- Results show the DLE adsorbent achieved a lithium recovery rate of approximately 95% from the brine, with total recovery (adsorption plus desorption) achieving approximately 88%
- Impurity rejection rates were very high producing a low impurity eluate conducive to the downstream conversion process.
- The concentrated eluate is being shipped in four batches to the facilities of Conductive Energy in Chicago, USA, for conversion into battery grade lithium carbonate
Shipment | Eluate Volume | Eluate Li Grade | LCE (kg) | Shipment Status |
1 | 24m3 | 2008 mg/L | 257 | Arrived process facility |
2 | 24m3 | 2360 mg/L | 301 | In Shipment |
3 | 24m3 | 2325 mg/L | 297 | In shipment |
4 | 17.5m3 | 2464 mg/L | 230 | At departure port |
Targeted | 90m3 | 2000 mg/L | 1022 | |
Total Achieved | 88m3 | 2289 mg/L | 1085 |
Table 1: Status of concentrated eluate from pilot plant first stage production
- Conductive Energy completed test-work on a 200L sample of concentrated eluate shipped in May 2024 to optimise the downstream process before receiving the larger volume shipments
- The conversion test-work produced multiple samples of lithium carbonate with 99.75% lithium carbonate purity demonstrating that the process achieves targets and is repeatable
- The result is a first confirmation that a process has been developed that will efficiently produce battery-grade lithium for the Laguna Verde project from pilot scale DLE eluate
- CleanTech Lithium continues to be a leader in exploration and development of DLE based projects in Chile and this pilot scale production will provide large test samples of lithium carbonate to potential offtake partners seeking product qualification.
- Subject to the completion of the re-injection well in September, the reserve report for Laguna Verde is scheduled to be completed by Montgomery and Associates in October 2024.
Steve Kesler, Executive Chairman and Interim CEO, of CleanTech Lithium PLC, said:
"We are very pleased by these results as it shows we can produce battery-grade lithium with low impurities from our Laguna Verde brine project. Working with our partners on the downstream process, Forward Water and Conductive Energy, we can now demonstrate the entire DLE process from brine to final lithium product.
"The optimised downstream process will now be applied to the initial volume of 88m3 of concentrated eluate, or approximately 1 tonne of LCE, produced from the first stage of production from our DLE pilot plant. This will produce significant test sample volumes of battery-grade lithium carbonate for commencement of testing with potential strategic partners. This is important whilst the Chilean government is reviewing the feasibility of lithium projects to identify the most advanced companies in Chile and if they are to reach their target of having three to four new lithium projects in development by 2026."
Further Information
Pilot Plant in Copiapó First Stage Production Completed
The Company´s DLE pilot plant is in Copiapó, Chile, approximately 275km from Laguna Verde. The plant finished commissioning in late March 2024 and up until mid-June a total volume of 1196m3 of brine from the Laguna Verde project was processed in the plant with a total of 14 cycles completed. Each cycle represents a volume of brine being fed first through filtration to remove suspended solids, then into DLE columns which are filled with adsorbent designed to be selective for lithium molecules. Lithium, as lithium chloride, is adsorbed from the brine, before desorption with water to create a purified lithium chloride eluate. A reverse osmosis (RO) unit at the DLE pilot plant then concentrates the eluate by extracting approximately 75% of the water to form a concentrated eluate.
Averaged across the 14 cycles, the recovery rate achieved by adsorption of lithium by the adsorbent was 95% and the recovery rate of desorption from the adsorbent was 93%. The total recovery rate averaged 88% and was highly consistent as shown in Figure 1. The temperature of the brine and desorption water, using the average ambient temperature in Copiapó during the March to June period of operation, was in the range of 20oC to 25oC, which did not significantly affect the recovery achieved.
Figure 1: Pilot Plant Total Recovery Rate
The eluate production rate was relatively stable after the initial ramp up period achieving an average of 2.8 kg LCE per hour. The design of the plant is 1 tonne per month of LCE based on designed monthly operating schedule of 360 hours. Due to budget and volume considerations, the plant was run for 384 hours for the first stage of planned operation producing a total of 1.085 tonnes of LCE as eluate. Based on the hourly production rate this met and exceeded the design capacity of the plant.
Figure 2: Pilot Plant Production Rate (Kg LCE/hr in Eluate)
Selectivity of the adsorbent is another key performance parameter for a DLE operation. DLE primarily acts as a purification stage, recovering lithium chloride from the brine whilst rejecting other impurities. For all the major ions in the brine, apart from boron, the rejection rate was very high as shown in Fig. 3 below. More cycles will further validate this performance. The quality of the eluate was consistent over the first stage of production with the low level of impurities facilitating downstream conversion.
Figure 3: DLE Performance - Rejection of Major Impurities
After completion of the DLE stage, the eluate is concentrated using a reverse osmosis (RO) unit at the pilot plant. On completion of both stages the lithium grade in the purified lithium chloride eluate is over ten times higher than the feed brine. The concentrated eluate was then loaded into a flexitank in a standard shipping container and transported to the port of Caldera for shipment to North America.
Downstream Processing into Battery Grade LithiumCarbonate: Test-work Completed
For the conversion of the concentrated lithium chloride eluate into battery grade lithium carbonate, CleanTech Lithium has engaged a leading lithium processing company, Conductive Energy, based in Alberta, Canada, which has facilities in Chicago, USA, with key downstream processing units shown in Figure 4 below. The status of the concentrated eluate shipment is shown in Table 1 with processing to commence in August 2024.
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Figure 4: Conductive Energy Carbonation Reactor Tank and Equipment for Washing, Filtering & Drying
In May 2024 CTL air-freighted a 200L sample of concentrated eluate from the pilot plant to Conductive Energy to undertake test-work to optimise the conversion process. The process steps are shown in Figure 5, involving a further stage of RO, before using Forward Osmosis (FO) to achieve a very high level of concentration. Ion exchange (IX) is used to remove calcium, magnesium, and boron. The final steps are carbonation and then washing, filtration and drying to produce a battery grade product. Conductive Energy´s approach is to simplify the process that achieves maximum yield by minimizing process steps and, where losses occur, produce fluids that are easily recycled to further maximize yield.
Figure 5: Conductive Energy Conversion Process
Reverse Osmosis and Forward Osmosis
The increase in eluate and lithium concentration in the R/O and F/O stages are shown in Table 2 below. R/O is effective for concentration until Total Dissolved Solids (TDS) reach the level of approximately 60,000 - 70,000 TDS, after which it is increasingly energy intensive and costly. F/O is highly effective in further concentration to the required lithium grade for carbonation, in this case 18,000mg Li/L (or 1.8% Lithium). The F/O unit is provided by Forward Water Technology, another Canadian company based in Ontario. F/O achieves a high concentration factor with much lower energy use than the alternative of using a mechanical evaporator, while being highly suitable for utilising solar thermal as the energy source to power the F/O process.
Parameter | Unit | Concentrated Eluate | R/O Concentrate | F/O Concentrate |
Lithium (Li) | mg/L | 2,194 | 5,700 | 18,000 |
Chloride (Cl) | mg/L | 11,039 | 37,000 | 110,000 |
Boron (B) | mg/L | 411 | 850 | 1,700 |
Calcium (Ca) | mg/L | 7 | 29 | 85 |
Magnesium (Mg) | mg/L | 14 | 50 | 150 |
Sodium (Na) | mg/L | 134 | 400 | 1,400 |
Sulphate (SO4) | mg/L | 103 | 120 | 330 |
Total Dissolve Solids (TDS) | mg/L | 19,260 | 62,000 | 190,000 |
Volume | L | 215.5 | 66.3 | 13.9 |
Reduction in Volume | % | 69.3% | 93.5% | |
Laboratory | ALS Chile | Lambton.Scientific | Lambton.Scientific |
Table 2: Results from concentration of Laguna Verde eluate through R/O followed by F/O
Ion Exchange to Remove Impurities
Ion exchange (IX) was used for removal of calcium and magnesium, which achieved 85% and 87% reductions respectively. While feed concentrations were low, 100% of barium and manganese were also removed in the same process. Additional optimization is possible with potential for further calcium removal. Lithium loss was low at 3%.
Conductive then applied its optimised IX for removal of boron. This was highly effective achieving >99.5% removal of boron. However, there was a 22% loss of lithium to the regeneration fluid. This would be recaptured by recycling the regeneration fluid to the F/O feed which was not implemented for this small-scale test-work. The lithium loss from the boron IX is expected to be reduced (recovered) to a steady state loss rate of about 3%.
Carbonation and Battery Grade Lithium Sample
The carbonation test-work achieved an exceptional yield of 96% of the theoretical maximum. The final product, after the wash procedure, was 99.75% lithium carbonate purity as shown in Table 3. Further optimisation of the washing stage is planned in order to reduce impurities to the greatest extent possible and therefore maximise the value of the battery grade product.
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Table 3: Process test-work lithium carbonate sample purity Fig. 6: Test-work sample
Additional Operations
Laguna Verde Reserve Report Update
The next stage of resource evaluation at the Laguna Verde project is to produce an updated JORC compliant resource and a reserve report based on converting a portion of resources into reserves. The management of the resource evaluation programme and reserve report is led by Montgomery and Associates, a leading hydrogeology consultant with extensive experience in resource evaluation of lithium brine projects in Chile and Argentina. Reserve estimation will feed directly into the Pre-Feasibility Study which is targeted for later this year.
The reserve calculation requires the completion of pumping tests and a re-injection well at the project which is scheduled for September 2024, when drilling equipment can be re-mobilised after the current winter break in operations. Subject to the completion of the re-injection well in September, the reserve report is scheduled to be completed by Montgomery and Associates in October 2024.
Competent Persons
The following professional acts as qualified person, as defined in the AIM Note for Mining, Oil and Gas Companies (June 2009) and JORC Code (2012):
Marcelo Bravo: Chemical Engineer (Universidad Católica del Norte), has a Master's Degree in Engineering Sciences major in Mineral Processing, Universidad de Antofagasta. He currently works as a Senior Process Consulting Engineer at the Ad-Infinitum company. Mr Bravo has relevant experience in researching and developing potassium, lithium carbonate, and solar evapo-concentration design processes in Chile, Argentina, and Bolivia. Mr Bravo, who has reviewed and approved the information contained in the chapters relevant to his expertise contained in this announcement, is registered with No. 412 in the public registry of Competent Persons in Mining Resources and Reserves per the Law of Persons Competent and its Regulations in force in Chile. Mr Bravo has sufficient experience relevant to the metallurgical tests and the type of subsequent processing of the extracted brines under consideration and to the activity being carried out to qualify as a competent person, as defined in the JORC Code. Mr Bravo consents to the inclusion in the press release of the matters based on his information in the form and context in which it appears.
The information communicated within this announcement is deemed to constitute inside information as stipulated under the Market Abuse Regulations (EU) No 596/2014 which is part of UK law by virtue of the European Union (Withdrawal) Act 2018. Upon publication of this announcement, this inside information is now considered to be in the public domain. The person who arranged for the release of this announcement on behalf of the Company was Gordon Stein, Director and CFO.
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