Changkeng
Guangdong, south-western rim of the Shanshui Basin (South China Fold Belt), China
Other hydrothermalAu
- Type
- Disseminated gold in brecciated cherts and jasperoidal quartz (Carlin-like or unconformity-related)
Adjacent but separate deposits on the south-western rim of the Shanshui Basin, about 75 km south-west of Guangzhou (112°48′01″ to 112°50′13″ E, 23°00′00″ to 23°00′02″ N). Largest gold deposit hosted in brecciated siliceous rocks in China (about 32 t Au at 6-8 g/t), in the upper part of the sequence and south of the ore field, poor in Ag (below 11 ppm). Fluid inclusions at 210 ± 80 °C and 1.6 to 7.3 wt% NaCl equiv.; meteoric fluid (δD from -80 to -30 ‰, water δ18O from -7.8 to -3.0 ‰, CO2 δ13C from -17.0 to -16.6 ‰ and 3He/4He from 0.0054 to 0.0100 Ra, after Guo and Du, 1996, and Sun et al., 1999). Sulfide lead close to that of the host rocks (Liang et al., 2007); gold earlier than the Fuwang silver.
206Pb/204Pb isotope ratio, no unit Values of the same system
Standard : NIST SRM 981
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 18.939 ± 0.295 | 18.58 / 19.251 | 4 | pyrite (three) and stibnite (one) of the gold ore Mean and standard deviation recalculated from 4 analyses, 18.580 to 19.251 (Cks15 (pyrite) 19.251; CK32 (pyrite) 19.092; CK38 (pyrite) 18.832; CK35 (stibine) 18.580). | Liang et al. (2007), Geology and geochemistry of the adjacent Changkeng gold and Fuwang s… |
207Pb/204Pb isotope ratio, no unit Values of the same system
Standard : NIST SRM 981
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 15.75 ± 0.062 | 15.672 / 15.801 | 4 | pyrite (three) and stibnite (one) of the gold ore Mean and standard deviation recalculated from 4 analyses, 15.672 to 15.801 (Cks15 (pyrite) 15.801; CK32 (pyrite) 15.797; CK38 (pyrite) 15.728; CK35 (stibine) 15.672). | Liang et al. (2007), Geology and geochemistry of the adjacent Changkeng gold and Fuwang s… |
208Pb/204Pb isotope ratio, no unit Values of the same system
Standard : NIST SRM 981
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 38.97 ± 0.185 | 38.7 / 39.104 | 4 | pyrite (three) and stibnite (one) of the gold ore Mean and standard deviation recalculated from 4 analyses, 38.700 to 39.104 (Cks15 (pyrite) 39.104; CK32 (pyrite) 39.075; CK38 (pyrite) 39.002; CK35 (stibine) 38.700). | Liang et al. (2007), Geology and geochemistry of the adjacent Changkeng gold and Fuwang s… |
Deposits of the same type
Cite this page
IsoFind Atlas (2026). Changkeng, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/changkeng/ (accessed 2026-10-21).
@misc{isofind2026changkengisotopesignatures,
title = {Changkeng, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/changkeng/},
note = {Accessed 2026-10-21}
}Updated : 2026-10-21