Central Seruyan
Central Kalimantan, Schwaner Mountains (Seruyan Regency), Indonesia
Epithermal depositsPb-Zn-Cu
- Type
- Epithermal base metal veins (Pb-Zn-Cu)
Deposit of the Central Borneo metallogenic belt, in volcanic and metavolcanic rocks of the Kuayan Formation (Manatan complex), near the Ruwai skarn. Four stages: barren quartz-sericite, quartz-chlorite-sericite ± epidote, galena-sphalerite-chalcopyrite veins (stage 2B, 170 to 320 °C, 0.1 to 0.4 km below the palaeosurface), late calcite-fluorite. Boiling and decompression quenching trigger metal deposition; As-Au zoning in pyrite and In-Ga zoning in sphalerite. Fluids from Late Cretaceous subduction magmas (Sepauk tonalite, Sukadana granite, Kerabai volcanics) according to lead (Choi et al., 2025). Coordinates not given.
206Pb/204Pb isotope ratio, no unit Values of the same system
Standard : NIST SRM 981
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 18.58774 ± 0.00414 | 18.58154 / 18.59323 | 13 | stage 2B pyrite, galena, sphalerite and chalcopyrite Mean and standard deviation recalculated from 13 analyses, six pyrites, two galenas, three sphalerites and two chalcopyrites (samples KM and 15-15m); lead homogeneous between minerals, slightly less radiogenic than the host dacite. | Choi et al. (2025), Fluid phase separation promotes mineralization of epithermal base met… |
| 18.68985 ± 0.05005 | 18.65402 / 18.74704 | 3 | altered host dacite (whole rock) Mean and standard deviation recalculated from 3 analyses, drill holes 11B (34.5 and 39.5 m) and 21A (59.5 m); aligned with the sulphides and the regional Late Cretaceous granitoids. | Choi et al. (2025), Fluid phase separation promotes mineralization of epithermal base met… |
207Pb/204Pb isotope ratio, no unit Values of the same system
Standard : NIST SRM 981
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 15.65636 ± 0.00179 | 15.65225 / 15.65858 | 13 | stage 2B pyrite, galena, sphalerite and chalcopyrite Mean and standard deviation recalculated from 13 analyses, six pyrites, two galenas, three sphalerites and two chalcopyrites (samples KM and 15-15m); lead homogeneous between minerals, slightly less radiogenic than the host dacite. | Choi et al. (2025), Fluid phase separation promotes mineralization of epithermal base met… |
| 15.66386 ± 0.00425 | 15.66124 / 15.66876 | 3 | altered host dacite (whole rock) Mean and standard deviation recalculated from 3 analyses, drill holes 11B (34.5 and 39.5 m) and 21A (59.5 m); aligned with the sulphides and the regional Late Cretaceous granitoids. | Choi et al. (2025), Fluid phase separation promotes mineralization of epithermal base met… |
208Pb/204Pb isotope ratio, no unit Values of the same system
Standard : NIST SRM 981
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 38.70144 ± 0.00615 | 38.68628 / 38.70801 | 13 | stage 2B pyrite, galena, sphalerite and chalcopyrite Mean and standard deviation recalculated from 13 analyses, six pyrites, two galenas, three sphalerites and two chalcopyrites (samples KM and 15-15m); lead homogeneous between minerals, slightly less radiogenic than the host dacite. | Choi et al. (2025), Fluid phase separation promotes mineralization of epithermal base met… |
| 38.87414 ± 0.07639 | 38.81853 / 38.96124 | 3 | altered host dacite (whole rock) Mean and standard deviation recalculated from 3 analyses, drill holes 11B (34.5 and 39.5 m) and 21A (59.5 m); aligned with the sulphides and the regional Late Cretaceous granitoids. | Choi et al. (2025), Fluid phase separation promotes mineralization of epithermal base met… |
Deposits of the same type
- Kremnica Slovakia
- Zlatá Baňa Slovakia
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- Sentachan Russia
- Aysén, northern group (El Toqui, Katerfeld) Chile
- Aysén, southern group (Fachinal, Mina Silva) Chile
- Aysén, southernmost group (El Faldeo, Lago Chacabuco, Lago Cochrane) Chile
- Cerro Negro (Marianas-San Marcos vein system) Argentina
Cite this page
IsoFind Atlas (2026). Central Seruyan, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/central-seruyan/ (accessed 2026-10-15).
@misc{isofind2026centralseruyanisotopesignatur,
title = {Central Seruyan, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/central-seruyan/},
note = {Accessed 2026-10-15}
}Updated : 2026-10-15