There are two types of deposits in the San Cristobal district, veins and mantoso Veins are roughly perpendicular to the axis of the Chumpe Anticline and mantos are emplaced along the Mitu volcanic rocks-Paria limestone contact.

The San Cristobal Vein system is made up of two main mineral-bearing structures, the San Cristobal Main Vein and the Siberia 1 Vein, The Oyama-Triunfo Vein, which is located on the northeast limb of the anticline, appears to be an extension of the San Cristobal Main Vein, Both veins are separated on the surface by Chumpe lake and no underground workings exist below the area that permit a clear correlation.

The San Cristobal Main Vein extends all the way along the San Cristobal fault, considering the Oyama-Triunfo Vein as its extension. The Siberia 1 Vein is located in the axial zone of the anticline# At present the San Cristobal mine is working in the San Cristobal Main Vein. This vein is well known underground and carries zinc, lead, copper, and silver minerals and locally tungsten minerals. The Siberia 1 Vein is little known in underground workings and carries mainly tungsten mineralization.

During 2019, the head grades increased by 0.45% and 8.31% in Zn and Ag respectively as a consequence of an operational management of dilution control in the Split 658, RP722 and Sheyla veins. The implementation of the sub level stoping mining method was consolidated in all veins.

Exploration was directed to the Split 658 and RP722 veins with favorable results in Zn and Ag, mainly in the upper and lateral part of the mine.

The infrastructure of the 1st stage of the electrical system in 10,000 volts for the deepening circuits was completed, guaranteeing an installed power of two MW.

The production of tons of mineral in 2019 was above 8.42%, the production results of fines in Zn and Ag were above 2018 by 7.61% and 19.69% respectively.