Blondin (Sentachan)
Sakha (Yakutia), Adychanskii ore region (Adycha-Taryn zone), Russia
Orogenic goldAu
- Type
- Vein gold-quartz (milky quartz with ankerite)
Adychanskii gold region, in the northern Verkhoyansk-Kolyma gold province: Upper Triassic argillites and siltstones sliced by thrusts, Early Cretaceous S-type granitoids; Delyuvial'noe, Lazovskoe and Sentachan ore fields. Aristov et al. (2017): two fluids of similar temperature and salinity, generated by metagenesis and mobilised during collision (quartz-A at 290-340 °C and 1550 bar, near 6 km; quartz-B, -AB and -C at 250-380 °C and 350-1250 bar, from 3.5 to 1.5 km). Occurrence of the Sentachan field (milky quartz-A with ankerite, together with Sentachan and Igor'); pyrite K-507-5 with 27 ppm Au: δ34S +0.1 ‰, 206Pb/204Pb 18.311, model age 85 Ma. Coordinates not published (schematic map only, frame 136°40'-137°20' E, 66°20'-66°40' N).
δ34S in ‰ (per mil) Values of the same system
Standard : V-CDT
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 0.1 ‰ | 1 | pyrite Single analysis (K-507-5). Fluid H2S estimated at -1.5 ‰ at 250 °C (isotope thermometry and inclusions). | Aristov et al. (2017), Sources of fluids and material for gold and antimony mineralizatio… |
206Pb/204Pb isotope ratio, no unit Values of the same system
Standard : Non précisé dans la publication
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 18.311 | 1 | pyrite Single analysis (K-507-5). Model age of 85 Ma (model U/Pb and Th/U in Table 1). The points plot on a secondary isochron of slope 0.158 (lead source near 2380-2350 Ma). | Aristov et al. (2017), Sources of fluids and material for gold and antimony mineralizatio… |
207Pb/204Pb isotope ratio, no unit Values of the same system
Standard : Non précisé dans la publication
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 15.529 | 1 | pyrite Single analysis (K-507-5). Model age of 85 Ma (model U/Pb and Th/U in Table 1). The points plot on a secondary isochron of slope 0.158 (lead source near 2380-2350 Ma). | Aristov et al. (2017), Sources of fluids and material for gold and antimony mineralizatio… |
208Pb/204Pb isotope ratio, no unit Values of the same system
Standard : Non précisé dans la publication
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 38.173 | 1 | pyrite Single analysis (K-507-5). Model age of 85 Ma (model U/Pb and Th/U in Table 1). The points plot on a secondary isochron of slope 0.158 (lead source near 2380-2350 Ma). | Aristov et al. (2017), Sources of fluids and material for gold and antimony mineralizatio… |
Deposits of the same type
- Muruntau Uzbekistan
- Kalgoorlie (Golden Mile) Australia
- Victorian Goldfields Australia
- Ashanti (Obuasi) Ghana
- Loulo (district de Gara-Yalea) Mali
- Gounkoto Mali
- Massawa Senegal
- Kirkland Lake (Macassa mine) Canada
Cite this page
IsoFind Atlas (2026). Blondin (Sentachan), isotope signatures. https://www.isofind.tech/isotopes/en/deposits/blondin-sentachan/ (accessed 2026-10-19).
@misc{isofind2026blondinsentachanisotopesignat,
title = {Blondin (Sentachan), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/blondin-sentachan/},
note = {Accessed 2026-10-19}
}Updated : 2026-10-19