Low-B geothermal springs of the Lhasa block (Xiqin, Qiaga, Xizha, Caizha, Xueru, Ruduo, Dezhong)
Tibet (Xizang), China
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Geothermal waters of the Tibetan Plateau sampled by Zhang et al. (2015): high-B waters (36.8 to 171.9 mg/L, Na-Cl, mostly 85-87 °C) along the Indus-Yarlung Zangbo suture and the N-S rifts, magmatic boron supplied by degassing of a cooling magma; low-B waters (0.4 to 34.6 mg/L, Na-Ca-HCO3-SO4) of the Lhasa block, boron leached from host rocks by water-rock interaction. Coordinates not published (map only). Waters at 35 to 82 °C, 0.4 to 34.6 mg/L B; springs in sedimentary rocks (Xiqin, Qiaga) heavier than those in volcanic rocks, close to the host rock (about -14 ‰).
δ11B in ‰ (per mil) Values of the same system
Standard : NIST SRM 951
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −10.99 ± 3.29 ‰ | −13.61 / −5.96 ‰ | 7 | geothermal water (dissolved boron) Mean and standard deviation recalculated from 7 analyses, -13.61 to -5.96 (Xiqin -5.96; Qiaga -6.73; Xizha -11.08; Caizha -12.82; Xueru -13.23; Ruduo -13.48; Dezhong -13.61). | Zhang et al. (2015), Boron geochemistry from some typical Tibetan hydrothermal systems: O… |
| −12.82 ‰ | 1 | Caizha geothermal water (dissolved boron) Single analysis (Caizha). 5.00 mg/L B, pH 7.93, > 70 °C; δ18O -18.26 ‰. Comparison measurement of Zhang et al. (2023), who see geothermal water as the main boron source of the salt lakes. | Zhang et al. (2023), Boron source and evolution of the Zabuye salt lake, Tibet: Indicatio… |
Deposits of the same type
Cite this page
IsoFind Atlas (2026). Low-B geothermal springs of the Lhasa block (Xiqin, Qiaga, Xizha, Caizha, Xueru, Ruduo, Dezhong), isotope signatures. https://www.isofind.tech/isotopes/en/sites/sources-geothermales-a-bore-faible-du-bloc-de-lhasa-xiqin-qiaga-xizha-caizha-xueru-ruduo-dezhong/ (accessed 2026-10-19).
@misc{isofind2026lowbgeothermalspringsofthelha,
title = {Low-B geothermal springs of the Lhasa block (Xiqin, Qiaga, Xizha, Caizha, Xueru, Ruduo, Dezhong), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/sites/sources-geothermales-a-bore-faible-du-bloc-de-lhasa-xiqin-qiaga-xizha-caizha-xueru-ruduo-dezhong/},
note = {Accessed 2026-10-19}
}Updated : 2026-10-19