Porphyry copper mineralization of the Mesozoic volcano-plutonic belts of Northeastern Asia: their similarities and differences, based on the petrochemical and isotope-geochemical evidence

Porphyry copper mineralization of various Mesozoic volcano-plutonic belts of Northeastern Asia exhibits both the similarities and differences. There are no significant differences in the composition of granitoids of porphyry copper systems of the different belts. Isotope-geochemical characteristics of the mineralization are contrasting. Objects of the Okhotsk-Chukotka and Oloi belts are characterized by a near-zero isotopic composition of the sulfide sulfur, which corresponds to a magmatic source. Isotopically heavier sulfur of mineralization of the Uyanda-Yasachnaya belt indicates borrowing the ore material from the hosting sedimentary-metamorphic sequences. Data on the ore lead isotopic composition indicate lower crustal sources of the Oloi belt and upper crustal ones of the Uyanda-Yasachnaya belt. The Okhotsk-Chukchi belt is characterized by heterogeneity of the sources of the mineral matter.