Jindalee Lithium

More Exceptional Metallurgical Results from McDermitt

In mid-November 2023, Jindalee Lithium Limited (Jindalee, the Company) announced results from beneficiation of composite samples from the Company’s 100% owned McDermitt Lithium Project located in Oregon, USA, and noted that acid leaching of beneficiated samples was underway1.


  • Excellent lithium (Li) extraction rates from acid leaching of beneficiated McDermitt ore
  • Li extraction from composite samples averaged 93% (250µm) and 94% (75µm)
  • Li extraction from all units exceeds 98% with higher acid additions
  • Leaching of a bulk sample is underway to enable downstream testwork
  • Samples have been shipped to POSCO for parallel leach testwork
Samples of ore were beneficiated with a cut-size of 250-micron (µm). Material passing was either leached directly (“250µm leach feed”) or ground further so that all passed 75µm (“75µm feed”).

Jindalee is pleased to advise that initial results from acid leaching of the beneficiated samples have been received, with extremely high lithium extraction rates recorded from both the 250µm and 75µm leach feeds using 500kg sulphuric acid per tonne of leach feed. The 250µm leach feed was also leached with a higher strength acid (850 kg/t leach feed) and returned exceptional extraction rates (>98.5%) for all units (Table 1).

Table 1 – Maximum Lithium Extraction at variable feed sizes and acid strengths - Units 4, 6, 8 and 10 (* calculated)

The leach testwork extended for up to four hours with most of the Li extraction occurring in the first hour. Optimised lithium extraction and acid addition rates will be incorporated into the Pre-Feasibility Study (PFS).

Leaching of a bulk composite has commenced to provide lithium in solution for downstream testwork. Beneficiated samples (250µm) have also recently been shipped to POSCO Holdings (NYSE: PKX) (POSCO) for testwork, pursuant to the Memorandum of Understanding signed with POSCO in February 20234.

Discussion

In July 2023 Jindalee shipped approximately 700kg of drill core to Hazen (Colorado, USA) for metallurgical testing, with this testwork being managed by global engineering, procurement, construction and maintenance (EPCM) company Fluor Corporation (Fluor). The core samples were selected from Units 4, 6, 8 and 10 within the Indicated portion of conceptual Pit Shell 6 (nominal 43 years); these units carry elevated lithium grades and selective mining of these units has the potential to deliver significantly higher-grade material (when compared to the Mineral Resource Estimate average grade) for processing (Figure 1) (Table 2)2.

Figure 1 – Schematic Section C-C’ with completed drilling, simplified geology and conceptual Pit Shell 6 (nominal 43 years). (Note: lateral projection onto section plane and 3x vertical exaggeration may cause distortion)

Head assays for these samples were announced in October 20233 with Units 4, 6, 8 and 10 averaging 1,790 ppm Li, 34% higher than the average McDermitt Mineral Resource grade (1,340 ppm Li)2. Results from attrition scrubbing (beneficiation) of a composite sample of McDermitt ore (250µm cut-size) were announced mid- November 2023, recording 92.0% Li recovery with 25.3% mass rejection and the lithium grade to leach increasing to 2,107 ppm Li1.

The acid leaching testwork now being reported was conducted on both 250µm and 75µm leach feed sizes using 500 kg/t (and 850 kg/t for 250µm leach feed). A composite sample (representing a nominal life-of-mine average feed) was also tested using the two leach feed sizes, recording very high lithium extraction rates using 500 kg/t. Lithium extraction from the coarser (250µm) leach feed was 92.9% and compares favourably with the extraction rate (94.0%) achieved from the finer (75µm) leach feed (Table 1).

Next Steps

Acid leaching of a bulk composite sample is currently underway to provide lithium in solution for downstream work. Results from this testwork will feed into the PFS which is expected to be completed mid-2024.

Samples from Units 4, 6, 8 and 10 have been beneficiated (250µm) and shipped to POSCO for parallel leach testwork, pursuant to the Memorandum of Understanding signed with POSCO.


Click here for the full ASX Release

This article includes content from Jindalee Lithium Limited, licensed for the purpose of publishing on Investing News Australia. This article does not constitute financial product advice. It is your responsibility to perform proper due diligence before acting upon any information provided here. Please refer to our full disclaimer here.

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Game-changing, economically significant lithium resource for North American battery supply chain

Resolution Minerals Ltd  To Develop U.S. Government Engagement Strategy with Clewett Global Services

Resolution Minerals Ltd To Develop U.S. Government Engagement Strategy with Clewett Global Services

Adelaide, Australia (ABN Newswire) - Resolution Minerals Ltd (ASX:RML) (FRA:NC3) (OTCMKTS:RLMLF) is pleased to announce the selection of Clewett Global Services as external affairs advisers to support the development of the Horse Heaven Antimony-Gold-Silver-Tungsten project in Idaho, USA.

Highlights

- Engagement in Washington D.C. is a critical step in positioning RML as a trusted partner in the U.S. critical minerals supply chain

- Resolution to consider applying for U.S. Department of Defense (DOD) funding to expedite Horse Heaven Project in Idaho

- Neighbouring Perpetua Resources (PPTA.NAS) was fast-tracked for development in April 2025, and received up to US$74 million in DOD funding, highlighting strong U.S. Government commitment and support for antimony and other critical metal projects

- By aligning with U.S. Government strategic priorities, RML is actively enhancing its ability to progress Horse Heaven on a faster schedule

- Antimony, Silver, Gold and Tungsten trading at record-high prices

CLEWETT GLOBAL SERVICES APPOINTED TO WORK WITH RESOLUTION TO DEVELOP U.S. GOVERNMENT ENGAGEMENT STRATEGY

The Horse Heaven Project is located directly adjacent to NASDAQ-listed Perpetua Resources' $2 billion Stibnite Gold and Antimony Project, which recently gained final record of decision approval from the U.S. Forest Service.

Horse Heaven has strong gold, antimony and silver mineralisation in two highly prospective structurally controlled mineralised corridors, and includes past-producing antimony, tungsten and gold mines.

Historical exploration results from Horse Heaven are highly encouraging and indicate similar geological characteristics to the neighbouring Stibnite project.

Given the importance of antimony to the U.S. Government's critical minerals strategy, Resolution Minerals is excited to develop the Horse Heaven Project and will be actively seeking the support of the U.S. Government to expedite its progress.

Founding Partner of Clewett Global Services, Todd Clewett, is a seasoned external affairs executive with a track record of success in engaging decision makers in Washington D.C. regarding mining and critical minerals projects. Clewett formerly headed up the external affairs function for both Newmont Corporation and Fortescue.

Background

The U.S. government has prioritised domestic and allied sources of key minerals such as antimony, tungsten and gallium recognising their importance to defense applications and renewable technologies.

Until now, the U.S. has relied mainly on China for the supply of many critical metals. Following China's total ban on exports of these metals to the U.S. in late 2024, a priority of the new Administration is to shore up its own domestic supply chains of these materials.

Fast-41 Program

The FAST-41 program, established by Title 41 of the Fixing America's Surface Transportation Act (FAST Act), is a program designed to improve the timeliness, predictability, and transparency of the federal environmental review and permitting process.

FAST-41 is designed to streamline and expedite the permitting process for infrastructure and mining projects deemed nationally significant. FAST-41 can offer benefits to project developers, including increased predictability, transparency and faster decision-making.

Some projects currently covered under FAST-41 include:

- Perpetua Resources' (PPTA.NAS) Stibnite Gold Project in Idaho

- Stillwater Palladium & Platinum Project in Montana

- Jindalee Resources' (ASX:JLL) McDermitt Lithium Project in Oregon

- BPH and RIO's Resolution Copper Project in Arizona

- South32's (ASX:S32) Hermosa Critical Minerals Project in Arizona

Resolution Minerals' efforts to participate in the FAST-41 program follow the precedent set in April this year by next-door neighbour, NASDAQ-listed Perpetua Resources (PPTA.NAS), whose Stibnite Gold Project in Idaho became the first mining project accepted under FAST-41, and by ASX-listed Jindalee Lithium Limited (ASX:JLL), whose McDermitt Lithium Project in Oregon was also successfully fasttracked under FAST-41 in April.

2025 Budget Reconciliation Bill ('Big Beautiful Bill')

The proposed 2025 Budget Reconciliation Bill includes US$2.5 billion to support U.S. production of critical minerals via the National Defense Stockpile. In addition, there is US$500 million allocated to the Department of Defense Credit Program for loans, loan guarantees, and technical assistance aimed at developing reliable sources of critical minerals - both within the U.S. and among key international allies.

Congress is expected to pass this bill (in some form) by the end of July 2025. Resolution has commenced plans to pursue all its available options to apply for funding that may become available upon passing of this proposed bill.

Resolution is considering opportunities under the U.S. Department of Defense's Title III and Industrial Base Analysis and Sustainment (IBAS) programs, which support the development of reliable and resilient supply chains for critical minerals.

RML's Executive Director, Aharon Zaetz commented:

"We are extremely honoured for Todd Clewett to want to work with us. We feel very excited that he shares the enthusiasm for the Horse Heaven project and sees the massive potential here. Todd's experience in working with governments to develop mining projects will be an invaluable asset to RML.

Todd's experience, knowledge and network in the White House provides him with an extremely rare and unique skillset that RML shareholders are extremely privileged to benefit from.



About Resolution Minerals Ltd:

Resolution Minerals Ltd (ASX:RML) is a mineral exploration company engaged in the acquisition, exploration and development of precious and battery metals - such as antimony, gold, copper, and uranium.

Resolution Minerals Ltd Listed on the ASX in 2017 and has a broad portfolio of assets, such as the Drake East Antimony-Gold Project in north-eastern NSW and George Project prospective for silica sand and uranium.



Source:
Resolution Minerals Ltd

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