Formation stages of the Kholodninskoye pyrite-polymetallic deposit ore zone

The Kholodninskoe pyrite-polymetallic deposit (Baikal-Patom plateau, Russia) was discovered in 1968, but the questions of its genesis still remain controversial. It is assumed that explosive activity volcanic apparatuses southern part Baikal-Muya zone as well underwater exhalations scattered spreading back-arc basin could have most likely influenced geochemical features amagmatic deposits Bodaibo and Patom zones. To investigate influence hydrothermal on Neoproterozoic carbonbearing sediments Baikal Mountain region, Olokit zone, which a fragment backarc basin, chosen. According to parameters, Itykit Ondokskaya formations hosting Kholodninskoye fall into sedimentation area DalnyaTaiga period paleobasins. Having compared development sulfide mineralization ore objects structural-formation zones, authors suggest unity formation processes within area. presence framboidal pyrite indicates early stages hydrothermal-stratiform polymetallic were synchronous with sedimentation. source enrichment zinc lead, silver other elements typical for low- medium-temperature associations solution basins. exhalation activities studied region also spread further northward, thus influencing siderochalcophilic specialization black shale strata