Mineralogical and geochemical characteristics of the Nadezhda gold ore prospect, Eastern Sayan
https://doi.org/10.21285/2686-9993-2019-42-4-413-424
Abstract
The aim of the work has been to study the composition and formation conditions for the Nadezhda prospect, Eastern Sayan. The study has been conducted for the ore bodies represented by low-sulfide quartz veins. Mineralogical, isotopic, geochemical and fluid inclusion studies of the ore bodies have been carried out. It has been found that the prevailing mineral is pyrite, while chalcopyrite, galena, sphalerite, tellurides (altaite, petzite, calaverite, melonite, krennerite, telluriumbismuthite, pilzenite, stuetzite, and volynskite) are less frequent. Native gold is present as veinlets and irregular grains in quartz and pyrite, cloddy and hook-like gold forms occurring as well. Intergrowths of gold and telluride minerals are commonly occurring. The fluid inclusion study has defined the temperature range of mineral formation (285-255 °С). The values of the sulfur isotopic compositions in the pyrite and equilibrium fluid correspond to those of mantle sulfur. Based on the geological position and mineralogical-geochemical characteristics, it has been established that the Nadezhda prospect is an analog of the Pionersky gold field, i.e. its southeastern extension.
About the Authors
A. D. Izvekova
Geological Institute, SB RAS
Russian Federation
Russian Federation
Postgraduate, Laboratory of Geochemistry and Ore Formation Processes
6a Sakhyanovoi St., Ulan-Ude 670047, Russia
B. B. Damdinov
Geological Institute, SB RAS
Russian Federation
Russian Federation
Dr. Sci. (Geol. & Mineral.), Leading Researcher, Laboratory of Geochemistry and Ore Formation Processes
6a Sakhyanovoi St., Ulan-Ude 670047, Russia
L. B. Damdinova
Geological Institute, SB RAS
Russian Federation
Russian Federation
Cand. Sci. (Geol. & Mineral.), Senior Researcher, Petrology Laboratory
6a Sakhyanovoi Stю, Ulan-Ude 670047, Russia
M. L. Moskvitina
Buryat State University
Russian Federation
Russian Federation
Master of Science student
26 Smolina St., Ulan-Ude 670000, Russia
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Review
For citations:
Izvekova A.D., Damdinov B.B., Damdinova L.B., Moskvitina M.L. Mineralogical and geochemical characteristics of the Nadezhda gold ore prospect, Eastern Sayan. Earth sciences and subsoil use. 2019;42(4):413-424. (In Russ.) https://doi.org/10.21285/2686-9993-2019-42-4-413-424
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