Open AccessLubavinskoe Au-bearing ore deposit: petrochemical features of rocks and ores, and the origin conditions (Eastern Transbakalia)
Author(s) -
Б. Н. Абрамов,
Б. Н. Абрамов,
V. Ph. Posohov,
В. Ф. Посохов,
Yu. A. Kalinin,
Ю А Калинин
Publication year - 2019
Publication title -
doklady akademii nauk. rossijskaâ akademiâ nauk
Language(s) - English
Resource type - Journals
ISSN - 0869-5652
DOI - 10.31857/s0869-56524856713-719
Subject(s) - geology , geochemistry , hydrothermal circulation , mantle (geology) , quartz , tectonics , δ34s , mesozoic , strontium , isotopes of oxygen , mineral resource classification , mineralogy , fluid inclusions , chemistry , geomorphology , structural basin , paleontology , organic chemistry
Lubavinskoe Au-bearing ore deposit is situated to submeridional deep layered tectonic zone. In these zones the ore veins are associated with small Mesozoic stocks of granodiorite and rocks of the dyke complexes of the sublatitudinal spread. According to geochemical features these intrusions are correspond to adacits. The proportion isotopic ratio of the oxygen and strontium at granodiorites indicates to their origin due to mantle-core interaction. Calculated oxygen isotope composition δ18 in the fluid in equilibrium with quartz in the productive phase 220-280 °С changes from 3,59 to 9.59‰, which corresponds to water of magmatic fluid nature. This is confirmed by the isotopic composition of sulfar for sulphides δ34S, ‰ from +0.7 to +6.7‰, corresponding to hydrothermal orogenic ore deposits.