PROSPECTING FOR LODE-TYPE BLIND GOLD OREBODIES

DOI: 10.24411/0869-5997-2018-10007

Abstract

It is shown that for gold deposits of four primary economic types, forecasting and research of blind orebodies is accomplished by analyzing the regularities of ore distribution on the upper explored horizons of deposits. Deep-seated deposits are characterized by a major vertical extent of mineralization totaling 3,5 km. Near-surface Au-Ag and telluride deposits are distinguished by a minor vertical extent divided by ore-free space. On the upper level, the ore is localized in
hundreds of meters from ancient paleosurface and, in case of weak erosion, from the con-temporary surface. On the lower level, the ore is localized in 600– 1000 m from the contemporary surface. Blind ore bodies of deep-seated and near-surface deposits are localized within structural traps. Six types of such traps have been found.