Pan American’s La Colorada silver mine expansion: grade, phasing and risk notes for engineers
Reviewed by Joe Ashwell
First reported on MINING.com
30 Second Briefing
Pan American Silver has identified at least four new high-grade veins — Filomena, Nicolasa, Bernardina and Josefina — at its La Colorada mine in Zacatecas, with about 40% of recent drill holes assaying above 1,000 g/t silver in the Candelaria zones. The company plans to fold the results into a June mineral reserve and resource update and is shifting to a phased development plan targeting higher-grade vein and skarn zones. The expansion comes as Mexico’s silver sector operates under elevated security risk following cartel-related violence and worker abductions.
Technical Brief
- Elevated security risk implies stricter access control, convoy protocols and journey management for La Colorada operations.
- Contractor and exploration crews will require enhanced vetting, tracking and communication systems during drilling and development.
- Emergency response planning must now factor in armed violence, roadblocks and potential mass-casualty scenarios, not only industrial accidents.
- Insurance, ESG and lender requirements are likely to push formalised security risk assessments alongside geotechnical and operational risk studies.
Our Take
Pan American Silver’s 22.8 Moz full-year 2025 silver output guidance places it at the upper end of primary silver producers in our database, meaning incremental tonnes from La Colorada can materially influence global silver supply-demand narratives in future price coverage.
The abduction of 10 Vizsla Silver workers in Sinaloa and the prior trapping of eight workers in a Coahuila coal mine underline that Mexico’s silver and coal belts are featuring more often in our safety-tagged items, which is likely to push operators and lenders to price in higher security and ESG risk premia for projects in Zacatecas and neighbouring states.
Pan American’s 44% interest in the Juanicipio mine JV, combined with expansion at La Colorada, suggests the company is consolidating a multi-asset silver platform in Mexico that can offset jurisdictional risk at assets such as Escobal in Guatemala and operations in Peru, Bolivia, and Argentina noted elsewhere in our coverage.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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