Sulphide-Magnetite Ores of Folded Areas as Possible Analogues of Current Oceanic Sulphide Formatios

Abstract

Based on analysis of tectonic position and mineralization environments, features of magmatism, ore composition and resources, the author discusses the similarities and differences between sulphide-magnetite and pyrites-polymetallic deposits in the continents and current sulphide ores in the oceans. Both derived from deep magmatic source of ore matter during the Earth's crust extension period. Notable is the striking similarity and even composition of the main typomorphic sulphide minerals and chemical elements-Fe, Zn, and Cu-throughout deposit formation. Sulphide-magnetite ores in igneous-sedimentary rocks in folded areas are considered to be part of the evolutional row of pyrites deposits toward ferrum and manganese oxide ones. The data provided widen the formation and location pattern of both iron-ore and pyrites-polymetallic deposits.