Orosur Mining, a South America-focused mineral exploration company, has announced major progress in its drilling work at the Anzá gold exploration project in Colombia and the El Pantano gold/silver exploration project in Argentina.
At Anzá, the Company is progressing towards an NI43-101 compliant Mineral Resource Estimate (MRE) for the Pepas prospect, scheduled for completion in January 2026.
Meanwhile, at El Pantano, the company has confirmed the presence of a low sulfidation epithermal mineral system, and drilling results indicate strong potential for continued exploration and development.
At the Anzá project, Orosur has full ownership of approximately 330 km² of exploration claims in the Mid-Cauca gold belt, following the acquisition of Minera Monte Aguila in November 2024 from previous joint venture (JV) partners Newmont Mining and Agnico Eagle Mines.
The company has focused its exploration on three main targets: Pepas, APTA and El Cedro.
Pepas is a shallow, high-grade gold zone that Orosur plans to advance to a maiden MRE, and infill drilling at Pepas began in July 2025.
In early November 2025, Orosur’s external geology and resources consultants visited the Anzá site to carry out a quality assurance and quality control audit and support the development of a new NI43-101 technical report.
Following consultant recommendations to better define the boundaries of the deposit, the final stages of the Pepas MRE drilling program have been extended to include several additional drillings, both within and beyond the current envelope of the deposit.
Drilling outside the deposit envelope revealed expected low-grade halo mineralization, providing valuable structural information.
Notably, hole PEP-067, drilled inside the envelope, returned 83.7 m at 4.29 grams per tonne (g/t) gold from surface.
At the El Pantano project in Santa Cruz province, Argentina, Orosur holds a 51% interest under a joint venture agreement with Deseado Dorado.
The project extends over approximately 550 km² within the Deseado massif, near Anglo Gold’s Cerro Vanguardia and Newmont Mining’s Cerro Negro mines.
Orosur is currently in the second phase of the joint venture and could achieve up to 100% ownership by investing $2 million (C$2.75 million) in exploration by February 2027.
So far, seven holes have been drilled at El Pantano, with samples from the first five undergoing gold fire assay, followed by multi-element analysis.
Drilling is progressing ahead of schedule and is expected to be completed by the end of January 2026.
Orosur CEO Brad George said: “Pepas is now in the final stage of its MRE process and the pieces are coming together for a January report. In the meantime, we are aligning targets for platform release later in December.
