Mineralization at the Morococha mine includes epi-mesothermal silver-zinc-lead-copper veins, bedded silver-base metal replacements or mantos (which together account for the majority of the previously mined and presently known mineralization at the Property), intrusive-sediment contact skarns, and the quartz porphyry-hosted Toromocho disseminated copper system. The size and geometry of individual ore shoots are lithology and structure dependent. Shoots range up to 400 metres in length with some traced for over 800 metres down plunge. Economic widths in the veins range from 0.5 metres to more than 6.0 metres. Vein width averages in the district are on the order of 1.2 metres.

Replacement manto mineralization is generally restricted to receptive stratigraphic horizons where favourable lithologies, especially carbonates, are intersected by mineralized veins or are proximal to pre-mineral intrusive rocks. Mantos can have a significant strike extent where the veins are closely spaced, and can range from less than one metre to up to 12 metres in width.

Ore and gangue mineralogy is similar in veins and mantos but varies considerably across the Property. Sphalerite, galena, and chalcopyrite are the most important primary minerals for zinc, lead, and copper while silver is generally present as freibergite (silver-tetrahedrite) or argentiferous galena. Gangue generally consists of quartz, calcite, barite, and rhodochrosite.

Similar to most large Peruvian polymetallic deposits, Morococha exhibits a distinct lateral and vertical metal zonation. The central Toromocho copper deposit grades outward through a lead-zinc minor silver zone and then into an outermost zone that is richer in silver with significant lead-zinc grades. There is also a distinct trend of higher silver grades at higher elevations on the west side of the Morococha mine. Silver assays of greater than 2,200 grams per tonne are not uncommon above 4,800 metres above sea level, and greater than 300 grams per tonne silver grades are also common in the outer silver-lead-zinc zone above the 4,400 metre elevation. In veins with significant vertical extents, silver grades tend to decrease as zinc grades increase with depth.

The hydrothermal alteration present at Morococha is typical of central Peruvian zoned polymetallic deposits.

Underground mining operations at Morococha consist primarily of long hole open stoping, and some conventional and mechanized overhand cut and fill. Classified tailings pumped hydraulically to stopes and waste rock are used for backfill where needed. Drilling is undertaken with hand held drills or electric hydraulic jumbo drills and the broken ore is removed using scoop trams. Mining of the wider veins and ore bodies has been mechanized with the aim of improving efficiency and operating costs. This mechanization is continuing on the narrower veins.

In the Manuelita and Sulfurosa areas of the mine, locomotives transport the ore in rail cars from the chutes to the shafts for hoisting. Other locomotives then transport the ore in rail cars to an adit where trucks then haul the ore to the stockpiles at the mill. In the Codiciada and Alapampa areas of the mine, ore is transported to underground stockpiles using scoop trams and then loaded onto haul trucks for transportation to surface via a haulage ramp.

The Manuelita (also known as Yauli) shaft has been deepened, and a new loading system is now available for production hoisting from a new mine level 70 metres below the Kingsmill tunnel. The Manuelita shaft is equipped with two 2.6 tonne skips which feed into chutes at an underground adit level from where material is transported in rail cars by a small locomotive to an adjacent surface truck loading facility. Ore is then trucked to the processing plant. The deepening project includes the development of a pumping station and other infrastructure to permit mechanized narrow vein stoping operations.

Morococha operates an 803,000 tonne per year capacity mill, known as the Amistad mill, using froth induced selective flotation technology to produce silver in zinc, lead, and copper concentrates. The mill flowsheet consists of two- stage crushing, ball mill grinding, selective flotation of the ore to concentrates, followed by thickening and filtering of the concentrates.

Ore is delivered from the mine to separate stockpiles for blending purposes. The ore is fed into a 600 tonne capacity coarse ore bin after passing through an 8 inch screen. Ore from the bin is fed to the crushing circuit by two 24 inch by 18 inch reciprocating feeders that discharge onto separate 36 inches wide by 50.6 feet long conveyors, which both discharge onto one conveyor of 36 inches wide by 85.3 feet long.

The grinding circuit consists of two stages of grinding and one stage of regrind to produce a final product of 65% passing 200 mesh (or 80% passing 153 microns) that feeds the bulk flotation circuit. Additionally there is a regrind stage for the zinc rougher concentrate at the zinc flotation circuit.

The flotation circuit includes an initial stage of depression of zinc and flotation of a bulk concentrate. The bulk concentrate consists of copper and lead which are treated in a separation circuit with activated carbon to eliminate residues of the collectors used in the previous stage, followed by the flotation of lead and the depression of copper. The tails of the bulk flotation are activated and conditioned with copper sulfate and lime to modify the pH and to produce a zinc concentrate.

The bulk flotation circuit includes two stages of roughing, five stages of cleaning, and three stages of scavenging. The bulk concentrates are sent to the copper-lead separation circuit and the scavenger tails are sent to the zinc flotation circuit. The copper-lead separation circuit has two conditioning tanks, one stage of roughing, five stages of cleaning, and one stage of scavenging. The lead concentrate is produced in the cleaning stage and the copper concentrates are the scavenging tails.

The zinc flotation circuit consists of four conditioning tanks, three stages of roughing, zinc regrind, three stages of cleaning, and five stages of scavenging of the cleaning tails. The cleaner concentrate and scavenging concentrate are combined to produce the zinc concentrate and the rougher tails are pumped to the Huascacocha tailings facility as final tails.

The zinc, lead, and copper concentrates are pumped to 30 foot diameter by 10 foot high thickeners for the copper concentrates, 40 foot diameter by 10 foot high thickeners for the lead concentrates, and 50 foot diameter by 10 foot high thickeners for the zinc concentrates to obtain pulps of approximately 58% solids by weight. After the thickeners, the copper and lead concentrates are sent to separate 8 foot by 12 foot drum filters for further dewatering, reducing the overall concentrate moisture content to 10% and 11% respectively. Zinc concentrates are fed into a horizontal 1500 mm x 1500 mm press filter which reduces the concentrate moisture to 12%. Water recovered from the thickener overflow is mixed with the water from the filter and collected in the decantation pond to recover fines. The concentrates are transported to a warehouse at the port of Callao near Lima for commercialization.