Volcano-plutonic belts and porphyry copper systems of New Guinea: Formation environments and metallogeny

DOI:10.47765/0869-7175-2024-10028

Abstract

 Geotectonic position of the volcano-plutonic belts of New Guinea and the structure and metallogeny of their belonging porphyry copper ore-magmatic systems are described. Based on analysis of the existing paleotectonic concepts, petrological composition of ore-bearing multiphase intrusions, age of their constituent differentiates, and mineral and chemical composition of the ores, it has been established that the formation of the world largest porphyry type Au-(Mo)-Cu and Au-Cu deposits, as well as of their spatially associated skarn and epithermal type precious metal deposits confined to the same single systems, is related to the formation of plutonic magmatic associations of essentially potassium calc-alkaline and shoshonite magmatic series of the continental-marginal andesitic and more later riftogenic belts. Differences in the multicomponent metallogeny of the porphyry copper systems of these belts are shown. The factors that caused the genesis of the giant mineral deposits are considered.