Hamuqu (Abunabu district)
Tibet, Ngari Prefecture, Gar County, China
Other hydrothermalSb
- Type
- Quartz-stibnite veins and lenses in Triassic slates
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 %. Two orebodies as veins, beads and lenses in sericite slates of the Qiongguo Group (Lower to Middle Triassic), along fault F3; stibnite with minor pyrite and arsenopyrite, quartz and sericite gangue. 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 |
|---|---|---|---|---|
| 0.025 ± 0.006 | 0.021 / 0.031 | 3 | stibnite fluid inclusions Mean and standard deviation recalculated from 3 analyses, 0.021 to 0.031 (HMQ-I-24 0.022; HMQ-I-25 0.031; HMQ-I-28 0.021); 4He of 1.06 to 1.58 × 10⁻⁷ cm3 STP/g; crustal values (less than 0.2 % mantle helium). | 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 |
|---|---|---|---|---|
| 309.5 ± 9.7 | 303.8 / 320.7 | 3 | stibnite fluid inclusions Mean and standard deviation recalculated from 3 analyses, 303.8 to 320.7 (HMQ-I-24 304.1; HMQ-I-25 303.8; HMQ-I-28 320.7); barely above air (295.5): argon from air-saturated meteoric water, 3 to 8 % radiogenic 40Ar. | 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 |
|---|---|---|---|---|
| −4.7 ± 0.3 ‰ | −4.9 / −4.4 ‰ | 3 | stibnite Mean and standard deviation recalculated from 3 analyses, -4.9 to -4.4 (HMQ-1-24 -4.4; HMQ-1-25 -4.9; HMQ-1-28 -4.7); samples labelled HMQ-I-24 to 28 in the text; six further Hamuqu stibnites (-4.7 to -3.2 ‰, Li et al., 2022) are compiled in the supplement and not included. | 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). Hamuqu (Abunabu district), isotope signatures. https://www.isofind.tech/isotopes/en/deposits/hamuqu-district-d-abunabu/ (accessed 2026-10-16).
@misc{isofind2026hamuquabunabudistrictisotopes,
title = {Hamuqu (Abunabu district), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/hamuqu-district-d-abunabu/},
note = {Accessed 2026-10-16}
}Updated : 2026-10-16