El Porvenir

The El Porvenir mine is an underground, polymetallic mine (located in the Cerro Pasco Complex) in the central Andes mountains region of Peru, specifically in the district of San Francisco de Asís de Yarusyacán, in the province of Pasco, Peru. The approximate coordinates of the mine are 367600m E, 8826850m N, using the Universal Transverse Mercator WGS84 datum, Z18S and the mine site is located at an average elevation of 4,200 meters above sea level. The mine is situated at kilometer 340 of the Carretera Central Highway (Lima—Huánuco route), 13 km from the city of Cerro de Pasco. The mine is located in the Central Cordillera zone, which contains the communities of Parán, Lacsanga and Santo Domingo de Apache.

Operations began in 1949 and, in 2025, the El Porvenir mine produced approximately 53.1 thousand tonnes of zinc contained in concentrates, 0.4 thousand tonnes of copper contained in concentrates, 25.2 thousand tonnes of lead contained in concentrates, 4,404.5 thousand ounces of silver contained in concentrates and 7.7 thousand ounces of gold contained in concentrates. The ore is treated at a concentrate plant that has a processing capacity of 2.4 million tonnes of ore per year.

The El Porvenir mine is a typical skarn deposit. The mineralization occurs within the contact of the upper Triassic limestone (i.e., exoskarn) and the granodioritic‑dacitic intrusive rocks (i.e., endoskarn). There are also recognized veins and replacement manto type, minor disseminated mineralization may occur within the intrusive units. West of the Milpo‑Atacocha fault within the Goyllarisquizga Group, mineralization is characterized as veins and disseminations. Most of the exploration is generally conducted simultaneously with underground development, which involves diamond core drilling and channel sampling following underground drifting.

Four groups of vein/mineralized structures are reported. Structurally controlled veins are sub‑vertical up to 150 meters long, with a vertical extent of 350 meters. Economic mineralogy is mostly comprised of galena, sphalerite, and tetrahedrite, as well as variable and lesser pyrite, quartz and rhodochrosite.

Throughout 2025, the exploration program at El Porvenir was focused on drilling mineralized zones in the Integration Project, seeking to evaluate the mineralization continuity in strike and at depth, with the goal of increasing mineral resources to expand the life of the El Porvenir and Atacocha mines, supporting the long-term sustainability and operational efficiency of the mining complex. In 2025, we drilled 17 drill holes totaling 11.8 km of exploration drilling. In 2026, the exploration drilling strategy will continue to focus on expanding mineral resources and mineral reserves in Integration Project.