Quzhen (Abunabu district)
Tibet, Ngari Prefecture, Gar County, China
Other hydrothermalSb
- Type
- Quartz-stibnite veins in slates at the contact of Cretaceous gabbros
Abunabu antimony district, in the west of the Tethys Himalayan metallogenic belt, about 164 km south-east of Shiquanhe (Gar County, Ngari); over 100,000 t Sb at 4.93 %. Deposit in the north of the district, orebodies No. II and III in sericite slates, at the contact of faults and Upper Cretaceous gabbros and Lower Cretaceous ultramafic rocks. Li et al. (2023): stibnite fluid inclusion noble gases of crustal type (3He/4He of 0.02 to 0.35 Ra, less than 6 % mantle helium) with argon from air-saturated meteoric water (40Ar/36Ar of 296 to 321); slightly negative sulfur (-4.9 to -3.5 ‰), of deep origin, shared by both deposits. Coordinates not published.
3He/4He (R/Ra) isotope ratio, no unit Values of the same system
Standard : Air (Ra = 1,4 × 10⁻⁶) : valeurs en R/Ra
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 0.172 ± 0.141 | 0.025 / 0.351 | 6 | stibnite fluid inclusions Mean and standard deviation recalculated from 6 analyses, 0.025 to 0.351 (QZ-Y-7 0.025; QZ-Y-23 0.026; QZ-Y-13 0.102; QZ-Y-15 0.227; QZ-Y-16 0.299; QZ-Y-17 0.351); QZ-Y-7 labelled QZ-Y-5-7 in Table 2; the four highest values (QZ-Y-13 to 17) have weak helium signals (4He of 0.016 to 0.053 × 10⁻⁷ cm3 STP/g), hence unreliable. | Li et al. (2023), Genesis of the Abunabu antimony deposits in the Tethys Himalayan metall… |
40Ar/36Ar isotope ratio, no unit Values of the same system
Standard : Air (40Ar/36Ar = 295,5)
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 298.8 ± 2.6 | 295.6 / 302.2 | 6 | stibnite fluid inclusions Mean and standard deviation recalculated from 6 analyses, 295.6 to 302.2 (QZ-Y-7 302.2; QZ-Y-23 301.7; QZ-Y-13 297.8; QZ-Y-15 295.6; QZ-Y-16 297.8; QZ-Y-17 297.7); close to air (295.5). | Li et al. (2023), Genesis of the Abunabu antimony deposits in the Tethys Himalayan metall… |
δ34S in ‰ (per mil) Values of the same system
Standard : V-CDT
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −4.1 ± 0.6 ‰ | −4.9 / −3.5 ‰ | 6 | stibnite Mean and standard deviation recalculated from 6 analyses, -4.9 to -3.5 (QZ-Y-5-7 -4.0; QZ-Y-23 -4.6; QZ-Y-13 -4.3; QZ-Y-15 -3.5; QZ-Y-16 -4.9; QZ-Y-17 -3.5); published mean of -4.1 ‰. | Li et al. (2023), Genesis of the Abunabu antimony deposits in the Tethys Himalayan metall… |
Deposits of the same type
Cite this page
IsoFind Atlas (2026). Quzhen (Abunabu district), isotope signatures. https://www.isofind.tech/isotopes/en/deposits/quzhen-district-d-abunabu/ (accessed 2026-10-16).
@misc{isofind2026quzhenabunabudistrictisotopes,
title = {Quzhen (Abunabu district), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/quzhen-district-d-abunabu/},
note = {Accessed 2026-10-16}
}Updated : 2026-10-16