The La Colorada mine is located in the Sierra Madre Occidental volcanic belt, at the contact between the
Lowe Volcanic Supergroup and the Upper Volcanic Supergroup. The oldest rocks exposed on the property are
Cretaceous limestones of the Cuesta del Cura Formation and calcareous clastic rocks of the Indidura Formation. They are overlain by conglomerates of the early Tertiary Ahuichilla Formation. East-to-northeast striking faults form the dominant structures at the property and play a strong role in local mineralization.

La Colorada is located in a region with significant silver and base metal production from vein and skarn deposits, and is considered a typical hydrothermal polymetallic deposit, with a transition of silver rich mineralization to more base metal rich mineralization at depth. This is the geological model considered for exploration and mineral resource and reserve estimation.

Economic mineralization at La Colorada is found in veins, replacement mantos within limestone, and skarn. The majority of the mineral resources and reserves are sourced from the NC vein series, the HW vein series, and Veta 3, all at the Candelaria mine; the Amolillo vein system at the Estrella mine; vein and manto mineralization at the Recompensa system at the Recompensa mine; and the new undeveloped skarn deposit, which is parallel to and below the NC vein series, east of the Candelaria mine.

Most mineralized veins on the Property strike east ........

Underground mining currently takes place at the Candelaria and Estrella mines utilizing cut and fill and long hole open stoping methods. Ore is hoisted to the surface in a shaft, and when required, may also be hauled to the surface using the mine access ramps present in both mines.

The main access ramps and haulage drifts are designed at 3.5 metres wide by 3.5 metres high, with a maximum gradient of 15%. Main levels have a vertical interval of 30 metres. Minimum mining widths are either 1.8 metres with planned dilution of 0.3 metres either side, or 1.5 metres with planned dilution of 0.2 metres either side, depending on vein width, and cuts are 2.4 metres high.

Hand held drills or electric hydraulic jumbo drills are used for development mining to access the ore, depending on the size of excavation required. Scoops are used for tramming ore and backfill to and from stopes, and haul trucks are used for underground ore haulage. Ground support is provided by rock bolts, with screen and shotcrete as required, as well as by backfilling mining voids with development waste rock or mill tailings. Ore is hoisted to the surface in a shaft with a capacity in excess of 2,300 tpd, and hauled to the mill crusher stockpile. When required, ore can be hauled to the surface using the two mine access ramps present in both mines.

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