The Bakyrchik deposit comprises disseminated gold-bearing sulfide ore minerals formed in a black shale formation, located in the Qalba gold province in Eastern Kazakhstan. The deposit has 280 t (since 2014 of ore estimation) of gold reserve with average 7.7 g/t in a gold containing carbonaceous-sulfide ore formation. The highest amount of gold-bearing sulfide minerals are localized in siltstones with 0.2 0.4% carbon and presence of the carbonates and the total sulfide content of the ore varies from 0.5% to 10%. The studied rock sample was taken from siltstone with high arsenic-bearing sulfide minerals and gold occurs in ultra-fine microscopic forms such as ionic and colloidal, included in arseniccontaining sulfide minerals. The gold-bearing sulfide minerals in the deposit are arsenic pyrite (1.81-4.86 wt% of As) and arsenopyrite.

The sulfide ores of gold deposits in eastern Kazakhstan contain high and low-gold arsenopyrites, formed at different stages of ore deposition. The arsenopyrite has two morphologic varieties such as acicular-prismatic (associating with invisible gold), which forms at the early productive stage of ore deposition, and late tabular arsenopyrite associated with free gold. The gold-bearing arsenic pyrite and arsenopyrite minerals of the Bakyrchik deposit occur in various paragenesis and show different morphology. Morphogenetic forms of arsenic pyrite and arsenopyrite crystals have differences in shape, size and chemical concentrations. There ar ........

Given the flat-dip and high-grade nature of the deposit, Kyzyl is mined via conventional drill-and-blast, truck-shovel open-pit mining methods for the first 10 years of operation.

Bakyrchik will be developed via open-pit mining for more than 15 years and substituted by underground mining that can potentially last more than 20 years.

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