The Yauli unit region shows mineralization related to polymetallic epithermal systems, replacement bodies and polymetallic vein systems, as well as porphyry mineralization and skarns, thus indicating the great potential of the area.

The two mining districts still in activity of the Yauli Dome area are Morococha to the northwest and San Cristobal-Andaychagua in the southern part of the Yauli Dome.

The southern portion of the Yauli Dome is the host of several vein-type and replacement mantles and bodies; including polymetallic deposits such as where Andaychagua, Carahuacra, San Cristobal and Ticlio are.

San Cristobal
Considered broadly, the Yauli Dome is the foremost structural feature of the San Cristobal region. This dome measures thirty kilometers by twenty kilometers. The long dimension strikes about N 40° W. The center of the Yauli Dome is formed by the Chumpe Anticline, the main structural feature of the San Cristobal area.

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 V ........

(Translated from Spanish by Google Translate)
Currently, four underground mines operate: San Cristóbal, Carahuacra, Andaychagua and Ticlio, whose extracted ore is treated in two concentrator plants, Victoria and Andaychagua.

The main mining methods used are Sub-level Stoping and Over Cut and Fill, while the Under Cut and Fill and SARC methods are also applied in some areas.

San Cristobal Mine
There was an increase of 1% in the head grade of Zn and 4% in the head grade of Pb, however a reduction of 14% in the head grade of Cu and 6% in the head grade of Ag, due to the delays in the primary developments of 2021 due to the impact of the third and fourth waves of the covid-19 in addition to delays in the replacement of equipment, which caused the pits scheduled for 2022 to have a lag in their exploitation, mainly in RP 722 and vein K, very important contributors in volume and grade.

Sub-level stoping is utilized as a primary mining method.

The exploration program focused on increasing geological certainty of the mineral resources planned to be mined in the next four years and incorporating new economic mineral resources with immediate operational scope. The lateral extensions and deepening of the main veins were evaluated, as well as the areas with high geological-economic potential, such as the Ramal Piso 722, 658, Split 658 and K vein veins; registering high metallic contents of Zn, Pb and Ag.

Andaychagua Mine

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