Pan American Silver has announced new drill results for its La Colorada underground mine in Zacatecas, Mexico, including multiple high-grade veins that indicate the potential for expansion of silver mineral resources, extension of mine life, and improved economics.
“Our exploration efforts have identified high-grade intercepts below and along the strike of the known La Colorada vein system, east of the defined mineral resource footprint demonstrating opportunities for further mineral resource expansion,” said Christopher Emerson, Pan American senior vice president of Exploration and Geology.
The drill results reflect an exploration program at La Colorada from November 2024 to June 2025, which saw approximately 65,000 meters drilled across 170 holes.
Infill and exploration drilling at the La Colorada mine continue to delineate multiple high-grade silver and base metal intercepts, significantly extending mineralization eastward along the NC2 and parallel Mariana vein systems, as well as into secondary structures located east of the current underground production area.
The Mariana vein now spans an approximate strike length of 1,000 m with a vertical extent exceeding 350 m, while the NC2 vein system exceeds 2,000 m on strike with a vertical extent of over 500 m. Exploration development on four levels of the mine, between 1,900 and 2,100 m above sea level, has advanced over 300 m east.
Notably, the results indicate higher gold grades, prompting further evaluation of the gold potential in future mine production. The mineralized structures remain open laterally and at depth, indicating significant opportunity for continued mineral resource expansion.
La Colorada is Pan American’s largest silver-producing mine; it also produces lead and zinc.