The Alpamarca-Rio Pallanga project is a deposit of lead, zinc, silver and copper veins. It is located 4,700 meters above sea level in the Santa Bárbara district of Carhuacayan, Yauli Province, Junin Region. The project consists of 2,100 hectares of concessions in an area with significant geological potential.

The Alpamarca operating unit is located in the Santa Bárbara district of Carhuacayán, Yauli province and Junín department, 182 km east of Lima.

This unit began operations in April 2014 and is made up of the mine Río Pallanga underground (suspended), the Alpamarca open pit, a concentrator plant called Alpamarca and the Romina - Puagjanca project.

According to the update of reserves as of December 2020, the exploitation of pit 51 Alpamarca is projected until December 2022, and in 2023 the plant will be fed with ore from stockpiles.

The plant has an installed capacity of 2,500 tpd according to design. At the plant, which uses the traditional crushing-milling-flotation tandem.

In 2020, the Alpamarca concentrator plant processed 784 thousand tons of polymetallic mineral from the Alpamarca pit and stockpiles in a stable manner.