Cu–Ag sulfides as indicators of pre-porphyritic epithermal Au–Ag deposits in Northeastern Russia
- Authors: Savva N.E.1, Sidorov A.A.2, Volkov A.V.2
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Affiliations:
- Northeastern Interdisciplinary Research Institute, Far East Branch
- Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry
- Issue: Vol 469, No 2 (2016)
- Pages: 782-786
- Section: Geology
- URL: https://ogarev-online.ru/1028-334X/article/view/188697
- DOI: https://doi.org/10.1134/S1028334X16080080
- ID: 188697
Cite item
Abstract
Au–Ag mineralization of the Olcha and Teploe epithermal deposits underwent thermal metamorphism due to porphyritic intrusions. The presence of Bi-bearing galena and matildite in the ores (Teploe), Cu–Te-bearing naumannite (Olcha), the occurrence of middle- and high-temperature facies of metasomatic rocks (epidote and actinolite), and temperature formation conditions are related, firstly, to the influence of granitoids on the ore process, which supplied not only Cu and Mo, but also Bi, Te, and, secondly, to the heating of host rocks containing pre-porphyritic epithermal Au–Ag mineralization. The abundance of Cu–Ag sulfides and Cu-acanthite resulted from the enrichment of later mineral phases in Cu and Ag under the substance redistribution with the formation of Ag-acanthite ores. The data considered in the paper are of practical importance for regional forecasting of metallogenic constructions, exploration, and evaluation of the epithermal Au–Ag deposits.
About the authors
N. E. Savva
Northeastern Interdisciplinary Research Institute, Far East Branch
Email: tma2015@yandex.ru
Russian Federation, Portovaya ul. 16, Magadan, 685000
A. A. Sidorov
Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry
Email: tma2015@yandex.ru
Russian Federation, Staromonetny per. 35, Moscow, 119017
A. V. Volkov
Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry
Author for correspondence.
Email: tma2015@yandex.ru
Russian Federation, Staromonetny per. 35, Moscow, 119017
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