Ergelyakh
Sakha (Yakutia), Adycha-Taryn metallogenic zone, Russia
Other hydrothermalAu (Bi)
- Type
- Intrusion-related gold-bismuth
Intrusion-related gold-bismuth occurrence of the Adycha-Taryn zone, above the dome of a granitoid pluton (about 50 km²): E-W lenticular quartz veins up to 1 m thick and 250 m long in granitoids and biotite hornfels; löllingite, danaite, arsenopyrite then bismuthinite and sulfotelluride (joseite, tetradymite) assemblages; gold fineness 750 to 960 ‰. Gamyanin et al. (2018): quartz at +12.6 and +12.9 ‰ (fluid +6.1 ± 0.4 ‰ at 330 °C), ankerite at -6.9 ‰ in δ13C, sulfides from -6.8 to -2.2 ‰: magmatic fluid. Late zoned cryptocrystalline quartz veins with silver-antimony mineralisation (Ag- and Se-bearing galena, freibergite) cut the gold-bismuth veins. Occurrence values: semitransparent quartz +12.6 and +12.9 ‰; zoned quartz +3.1 ‰; ankerite -6.9 ‰ in δ13C and +5.7 ‰ in δ18O; δ34S: arsenopyrite -2.2; -2.8; -3.7, pyrite -6.7; -6.8 ‰. 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 |
|---|---|---|---|---|
| 12.8 ± 0.2 ‰ | 12.6 / 12.9 ‰ | 2 | semitransparent quartz (sulfotellurides assemblage, gold-bismuth mineralisation) Mean and standard deviation recalculated from 2 analyses, +12.6 to +12.9 (+12.6; +12.9). | Gamyanin et al. (2018), Noble-metal mineralization of the Adycha-Taryn metallogenic zone:… |
| 3.1 ‰ | 1 | zoned quartz (galena assemblage, silver-antimony mineralisation) Single analysis. | Gamyanin et al. (2018), Noble-metal mineralization of the Adycha-Taryn metallogenic zone:… | |
| 5.7 ‰ | 1 | vein ankerite (gold-bismuth mineralisation) Single analysis. Carbonate not named in Table 4, mineral inferred from the text (ankerite for gold, calcite for silver-antimony). | Gamyanin et al. (2018), Noble-metal mineralization of the Adycha-Taryn metallogenic zone:… |
δ13C in ‰ (per mil) Values of the same system
Standard : V-PDB
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −6.9 ‰ | 1 | vein ankerite (gold-bismuth mineralisation) Single analysis. Carbonate not named in Table 4, mineral inferred from the text (ankerite for gold, calcite for silver-antimony). | 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 |
|---|---|---|---|---|
| −2.9 ± 0.8 ‰ | −3.7 / −2.2 ‰ | 3 | productive-vein arsenopyrite (gold-bismuth mineralisation) Mean and standard deviation recalculated from 3 analyses, -3.7 to -2.2 (-2.2; -2.8; -3.7). | Gamyanin et al. (2018), Noble-metal mineralization of the Adycha-Taryn metallogenic zone:… |
| −6.8 ± 0.1 ‰ | −6.8 / −6.7 ‰ | 2 | productive-vein pyrite (gold-bismuth mineralisation) Mean and standard deviation recalculated from 2 analyses, -6.8 to -6.7 (-6.7; -6.8). | Gamyanin et al. (2018), Noble-metal mineralization of the Adycha-Taryn metallogenic zone:… |
Deposits of the same type
Cite this page
IsoFind Atlas (2026). Ergelyakh, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/ergelyakh/ (accessed 2026-10-19).
@misc{isofind2026ergelyakhisotopesignatures,
title = {Ergelyakh, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/ergelyakh/},
note = {Accessed 2026-10-19}
}Updated : 2026-10-19