Aulochan
Sakha (Yakutia), Adycha-Taryn metallogenic zone, Russia
Orogenic goldAu
- Type
- Low-sulfide orogenic gold-quartz
Gold-quartz (gold-sulfide-quartz) occurrence of the Adycha-Taryn metallogenic zone, Yana-Kolyma gold belt: veins, vein zones and disseminations in Permian to Lower Jurassic sandstones and siltstones of the Kular-Nera slate belt, controlled by thrusts related to accretion of the Kolyma-Omolon microcontinent (mineralisation mostly at about 140-130 Ma). Gamyanin et al. (2018): milky quartz from +14.2 to +19.5 ‰ (calculated fluid +7.3 to +12.3 ‰ at 300 °C), ankerite from -9.1 to -6.1 ‰ in δ13C, sulfides from -6.6 to +5.4 ‰ in δ34S: increasing share of metamorphic fluids. Occurrence values: milky quartz +17.8 and +18.3 ‰; δ34S: arsenopyrite -0.4, pyrite +0.7; -0.6; -1.2, stibnite -1.3 ‰. Coordinates not published (schematic map only).
δ18O in ‰ (per mil) Values of the same system
Standard : V-SMOW
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 18.1 ± 0.4 ‰ | 17.8 / 18.3 ‰ | 2 | milky quartz (galena and tetrahedrite assemblage, gold-quartz mineralisation) Mean and standard deviation recalculated from 2 analyses, +17.8 to +18.3 (+17.8; +18.3). | Gamyanin et al. (2018), Noble-metal mineralization of the Adycha-Taryn metallogenic zone:… |
δ34S in ‰ (per mil) Values of the same system
Standard : V-CDT
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −0.4 ‰ | 1 | productive-vein arsenopyrite (gold-quartz mineralisation) Single analysis. | Gamyanin et al. (2018), Noble-metal mineralization of the Adycha-Taryn metallogenic zone:… | |
| −0.4 ± 1 ‰ | −1.2 / 0.7 ‰ | 3 | productive-vein pyrite (gold-quartz mineralisation) Mean and standard deviation recalculated from 3 analyses, -1.2 to +0.7 (+0.7; -0.6; -1.2). | Gamyanin et al. (2018), Noble-metal mineralization of the Adycha-Taryn metallogenic zone:… |
| −1.3 ‰ | 1 | productive-vein stibnite (gold-quartz mineralisation) Single analysis. | Gamyanin et al. (2018), Noble-metal mineralization of the Adycha-Taryn metallogenic zone:… |
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Cite this page
IsoFind Atlas (2026). Aulochan, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/aulochan/ (accessed 2026-10-19).
@misc{isofind2026aulochanisotopesignatures,
title = {Aulochan, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/aulochan/},
note = {Accessed 2026-10-19}
}Updated : 2026-10-19