GEOLOGY AND GEOCHEMISTRY OF OROYOK SEDIMENT-HOSTED COPPER OCCURRENCE (KOLYMA TERRANE, NORTHEASTERN RUSSIA)
Oroyok copper occurrence hosted by Riphean shists. Detail described geology and geochemical zonation of ore-bearing sequence, showed mineralogy of ore zones. Detected broad range of copper minerals. The Oroyok occurrence placed to group of sediment-hosted copper mineralization, specific features of that is transgressive type of hosted rock sequence, submarine conditions of sedimentation, localization of red beds near foot of ore zones, organic-rich horizons, favored for reducing of the metalliferous brines.