- CEO
- Zeffron Charles Reeves
- Full Time Employees
- 10
- Sector
- Non-energy minerals
- Industry
- Precious metals
- Address
- 62 Ord Street Fremantle WA Australia 6160
- IPO Date
- Dec 19, 2003
- Business
- Tesoro Gold Ltd (ASX:TSO) is an Australia-based gold exploration and development company focused on advancing district-scale gold projects in the Coastal Cordillera region of Chile. The company holds an 85% interest in the El Zorro Gold Project, covering approximately 570 square kilometers in Chile's Atacama Region, 130 kilometers north of Copiapo City; this flagship asset hosts the Ternera Gold Deposit, an intrusive-related gold system with a mineral resource estimate exceeding 1.1 million ounces of gold, alongside ongoing exploration at prospects including Ternera East, Drone Hill NW, Falda, and Pena Blanca. Founded in 2017 and headquartered in Perth, Western Australia, Tesoro conducts acquisition, exploration, drilling, resource delineation, scoping and pre-feasibility studies, and development activities targeting high-grade gold deposits in a tier-1 mining jurisdiction with established infrastructure, power, water access, and skilled workforce.
Its primary operations center on the El Zorro project, where it pursues open-pit mining potential, underground evaluation, geomechanical modeling for new targets, magneto-telluric geophysical surveys, and regional expansion along a 30-kilometer intrusive-related gold corridor; the company employs diamond drilling for resource growth, infill confirmation, and extension testing, with plans for pre-feasibility studies through 2026, construction in 2028, and first gold production in mid-2029. Subsidiaries such as Tesoro Mining Chile SpA (95% owned), El Zorro S.C.M. (93.8% owned by the subsidiary), and Tesoro Australia Pty Ltd support Chilean concessions and Australian administration.
In recent developments, Tesoro changed its name from Tesoro Resources Ltd in April 2022 to reflect its gold focus, expanded the El Zorro concession area by 22 square kilometers in 2022 for approximately A$96,000, and completed a share consolidation on December 3, 2025. Gold Fields Ltd increased its strategic equity stake from 14% to 19% in January 2024, providing exploration acceleration support; the company secured A$34 million via a September 2025 placement to fund resource growth at Ternera, extensive drilling, pre-feasibility and definitive feasibility studies, and regional exploration. Additional funding included A$11.1 million in equity commitments post-quarter with Gold Fields' A$1.75 million participation, alongside updated scoping studies confirming robust economics for over 1.2 million ounces production over 15 years and issuance of over 9 million shares in December 2025 for secondary trading.