Tambomayo is an epithermal/mesothermal polymetallic deposit in veins of gold and silver, with base metals in veins of quartz, emplaced in andesitic volcanic rocks from the Tertiary. Gold is found in native state and electrum, while silver is found in sulfides and sulfosalts accompanied by galena and sphalerite. It has two main systems of veins: Mirtha, running NW-SE, and Paola, running N-NE. There are also nearby exploration areas.

The underground works on the main Mirtha and Paola veins and diamond drilling carried out to date show an economic mineralization that deepens up to approximately 900 meters and it expands over 900 horizontal meters (1,500 horizontal meters as a quartz system), increasing the size of the economic mineralization area to explore.

The mining method in Tambomayo’s underground mine is sub level stopping and mechanized bench and fill, this method is used to mine massive ore body (30m between sublevels and 10m stope span). Owner conduct the ore mining is made while horizontal labor is provided by a service provider. The equipment used for development and exploration includes single-arm jumbos, bolters, scaler and scoop loaders (4-6yd3). The equipment used ins stopes are Simbas (Bolting Cable and Production) and scoops with remote control (6-7yd3). Ore haulage to surface is done with 35 m3 tipper trucks. Ore is taken to the process plant with 35 m3 tipper trucks.

The metallurgical process at Tambomayo consists of primary crushing, fine milling, and cyanidation in tanks to obtain rich solutions in gold and silver to be processed using the Merrill-Crowe plant. The precipitate is dried and smelted, obtaining doré bars (gold and silver). The cyanidation tailings enter the flotation process, from where lead-silver and zinc-silver concentrates are obtained.

Treatment Capacity: 2,000 MTD.