Resource Expansion Potential at San Jorge Lithium Project Hinges on Upcoming Drilling

Maiden Resource Establishes Solid Foundation

Greenwing Resources Ltd (ASX:GW1) has delivered a significant milestone with the announcement of a maiden Mineral Resource Estimate for its San Jorge Lithium Brine Project in Argentina. The estimate totals 1.07 million tonnes of Lithium Carbonate Equivalent (LCE), comprising 0.67 Mt in the Indicated category and 0.4 Mt as Inferred Resources. This initial resource underscores the project's potential as a meaningful lithium brine asset within the globally strategic Lithium Triangle.

Geophysical Surveys Illuminate Resource Upside

Recent Magnetotelluric (MT) and Transient Electromagnetic (TEM) geophysical surveys have been pivotal in expanding the understanding of the brine body. These surveys confirm that lithium-bearing brine extends significantly beyond the salar boundaries, more than 4 kilometres to the west and over 5 kilometres to the north. Notably, the MT data reveals the brine body extends to depths of approximately 600 metres, well beyond the 402 metres reached by drilling to date.

The deepest drill holes, SJDD04 and SJDD05, recorded lithium concentrations increasing with depth, peaking at 248 mg/L. This trend suggests that lithium grades could improve further below current drilling depths, highlighting substantial potential for resource growth.

Strategic Land Position and Exploration Potential

Greenwing holds the exclusive right to acquire 100% ownership of the entire 2,800-hectare San Francisco Salar and an additional 36,000 hectares surrounding it. This extensive tenure provides the company with strategic flexibility to explore and develop the project without third-party interference, a rarity in the Lithium Triangle.

Importantly, much of the most prospective areas remain untested by drilling. The company’s initial six-hole drilling program focused on technically accessible zones, leaving open the possibility of expanding the resource both laterally and at depth. The exploration target defined beyond the maiden resource ranges between 0.37 and 1 Mt LCE, which will be the focus of the upcoming Phase 2 drilling campaign.

Next Steps: Phase 2 Drilling and Environmental Planning

Greenwing plans to undertake a second phase of drilling comprising seven additional diamond holes aimed at resource definition and testing the exploration target. The company is also advancing environmental data collection to support a future Environmental Impact Assessment (EIA), a critical step toward project feasibility.

Additionally, Greenwing is evaluating Direct Lithium Extraction (DLE) technologies, which could offer more efficient and environmentally friendly lithium recovery compared to traditional evaporation methods. Discussions are ongoing to secure funding to progress the project through feasibility, including expanded drilling and processing test work.

Context Within the Lithium Market

San Jorge sits within the Lithium Triangle, a globally significant lithium brine region hosting major projects by industry leaders such as Zijin Mining, Ganfeng, and Rio Tinto. Lithium extracted from brine offers a lower carbon footprint and cost advantage over hard rock sources, aligning with the global push toward electrification and renewable energy storage.

Greenwing’s maiden resource and promising geophysical data position the company well to capitalize on the recovering lithium market. However, the project remains at an early stage, and further drilling and technical studies will be essential to confirm the resource’s full potential and economic viability.