Bakyrchik
Eastern Kazakhstan, Bakyrchik district (Kyzyl shear zone), Kazakhstan
Orogenic goldAu (Sb)
- Type
- Disseminated gold-sulfide in black shales, with late antimony
West Kalba gold belt (Ob-Zaisan Hercynides), in Carboniferous carbonaceous terrigenous-carbonate rocks; invisible gold in disseminated pyrite and arsenopyrite, close to the Carlin type according to the authors, late antimony (stibnite in quartz-stibnite veins and breccias) emplaced during extension. Gold-sulfide ore controlled by the E-W Kyzyl shear zone (over 17 km) at its junction with the West Kalba and North-West thrusts; four stages: pre-ore alteration, auriferous quartz-sericite-arsenopyrite-pyrite, polymetallic stage with free gold, then quartz-stibnite with marcasite, jamesonite, enargite, native Sb and Au; Sb increasing towards the surface. Disseminated ore dated at about 285 Ma at the nearby Bol'shevik deposit. Coordinates not published.
δ34S in ‰ (per mil) Values of the same system
Standard : V-CDT
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −0.7 ‰ | 1 | stibnite (quartz-stibnite veinlet) Single analysis (Bk-6). Sulfur close to the meteoritic zero, from a deep source common to all deposits according to the authors. | Kovalev et al. (2014), Relationship of antimony with gold mineralization in the ore distr… |
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Cite this page
IsoFind Atlas (2026). Bakyrchik, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/bakyrchik/ (accessed 2026-10-19).
@misc{isofind2026bakyrchikisotopesignatures,
title = {Bakyrchik, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/bakyrchik/},
note = {Accessed 2026-10-19}
}Updated : 2026-10-19