Zhaxikang
Longzi County, Shannan, southern Tibet (Tethyan Himalaya), China
Other hydrothermalPb-Zn-Sb-Ag
- Type
- Fault-controlled Pb-Zn-Sb-Ag veins and breccias
One of the largest Pb-Zn deposits in China (1.23 Mt Pb + Zn + Sb), as veins and breccias along north-south faults (F2, F7) in Jurassic shales and sandstones of the Ridang Formation; hydrothermal Fe-Mn carbonates, fluid inclusions at 190 to 288 °C. Debated origin (reworked SEDEX, epithermal or magmatic-hydrothermal at about 20 Ma); sulfide zinc, close to that of regional igneous rocks, points to a magmatic fluid, while sulfur and lead indicate a sedimentary contribution. Coordinates read on the map of the publication.
δ66Zn in ‰ (per mil) Values of the same system
Standard : JMC 3-0749L
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 0.18 ± 0.06 ‰ | 0.03 / 0.26 ‰ | 20 | sphalerite Mean and standard deviation recalculated from 20 samples, Table 2. Direct measurements without column; the two repeats after column chemistry (B1 at 1.20 ‰ and B14 at 1.12 ‰) differ by about 1 ‰ and are not used, as by the authors. | Duan et al. (2016), Zinc and lead isotope signatures of the Zhaxikang Pb-Zn deposit, Sout… |
| 0.23 ± 0.04 ‰ | 0.19 / 0.28 ‰ | 4 | galena Mean and standard deviation recalculated from 4 samples, Table 2. No notable fractionation between galena and sphalerite. | Duan et al. (2016), Zinc and lead isotope signatures of the Zhaxikang Pb-Zn deposit, Sout… |
| 0.27 ‰ | 0.27 / 0.27 ‰ | 2 | hydrothermal Fe-Mn carbonate (siderite) veins Mean and standard deviation recalculated from 2 samples, Table 2. Close to the ore fluid according to the authors. | Duan et al. (2016), Zinc and lead isotope signatures of the Zhaxikang Pb-Zn deposit, Sout… |
| 0.36 ± 0.02 ‰ | 0.33 / 0.37 ‰ | 4 | regional igneous rocks (pyroclastic rock, quartz diorite, dolerite, rhyolite porphyry) Mean and standard deviation recalculated from 4 samples, Table 2. The more evolved porphyritic monzogranite is heavier (0.49 ‰). | Duan et al. (2016), Zinc and lead isotope signatures of the Zhaxikang Pb-Zn deposit, Sout… |
206Pb/204Pb isotope ratio, no unit Values of the same system
Standard : Non précisé dans la publication
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 19.803 ± 0.103 | 19.686 / 19.896 | 11 | galena (in situ analyses) Mean and standard deviation recalculated from 11 spots, Table 3. Two drill-core samples; very radiogenic lead, mainly derived from shales. | Duan et al. (2016), Zinc and lead isotope signatures of the Zhaxikang Pb-Zn deposit, Sout… |
| 19.13 ± 0.224 | 18.727 / 19.458 | 10 | sphalerite (in situ analyses) Mean and standard deviation recalculated from 10 spots, Table 3. Less radiogenic and more scattered than galena: mixture of basement and sedimentary lead. | Duan et al. (2016), Zinc and lead isotope signatures of the Zhaxikang Pb-Zn deposit, Sout… |
207Pb/204Pb isotope ratio, no unit Values of the same system
Standard : Non précisé dans la publication
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 15.862 ± 0.015 | 15.848 / 15.9 | 11 | galena (in situ analyses) Mean and standard deviation recalculated from 11 spots, Table 3. Two drill-core samples; very radiogenic lead, mainly derived from shales. | Duan et al. (2016), Zinc and lead isotope signatures of the Zhaxikang Pb-Zn deposit, Sout… |
| 15.606 ± 0.112 | 15.355 / 15.735 | 10 | sphalerite (in situ analyses) Mean and standard deviation recalculated from 10 spots, Table 3. Less radiogenic and more scattered than galena: mixture of basement and sedimentary lead. | Duan et al. (2016), Zinc and lead isotope signatures of the Zhaxikang Pb-Zn deposit, Sout… |
208Pb/204Pb isotope ratio, no unit Values of the same system
Standard : Non précisé dans la publication
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 40.385 ± 0.054 | 40.339 / 40.537 | 11 | galena (in situ analyses) Mean and standard deviation recalculated from 11 spots, Table 3. Two drill-core samples; very radiogenic lead, mainly derived from shales. | Duan et al. (2016), Zinc and lead isotope signatures of the Zhaxikang Pb-Zn deposit, Sout… |
| 39.347 ± 0.35 | 38.685 / 39.826 | 10 | sphalerite (in situ analyses) Mean and standard deviation recalculated from 10 spots, Table 3. Less radiogenic and more scattered than galena: mixture of basement and sedimentary lead. | Duan et al. (2016), Zinc and lead isotope signatures of the Zhaxikang Pb-Zn deposit, Sout… |
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Cite this page
IsoFind Atlas (2026). Zhaxikang, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/zhaxikang/ (accessed 2026-10-13).
@misc{isofind2026zhaxikangisotopesignatures,
title = {Zhaxikang, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/zhaxikang/},
note = {Accessed 2026-10-13}
}Updated : 2026-10-13