Dagejia (caesium geyserites)
Southern Tibet (Xizang), Shiquanhe-Yarlung Zangbo geothermal field, China
OtherCs (Rb, Li, B)
- Type
- Hot-spring caesium geyserites
Caesium deposit in geyserites (siliceous sinters) of rare-alkali-rich geothermal springs along the Indus-Yarlung Zangbo suture; about 15,000 t Cs for the region (Zhang, 2014). Li et al. (2023): rare alkali enrichment by metapelite melting then water-rock interaction at 210-250 °C in the reservoir, and Cs adsorption during silica precipitation; loss of Cs and B during the opal-A, opal-CT, chalcedony, quartz transformation. Coordinates not published. Fresh geyserites mostly opal, mean Cs 2333 µg/g; Na-HCO3 springs at 82 to 85 °C at the vent.
δ11B in ‰ (per mil) Values of the same system
Standard : NIST SRM 951
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −17.2 ± 6.7 ‰ | −26.9 / −8.4 ‰ | 5 | fresh geyserite (opal-A and opal-CT) Mean and standard deviation recalculated from 5 analyses, -26.9 to -8.4 (DGJ-6 opale CT -14.7; DGJ-8 opale CT -17.8; DGJ-9 opale A -26.9; DGJ-10 opale A et calcédoine -8.4; DGJ-11 opale CT -18.0). 191 to 1250 µg/g B and 2034 to 9030 µg/g Cs; boron mostly tetrahedral (11B NMR). δ11B anticorrelated with boron. The text gives -16.9 ‰ as the minimum, the table -26.9 ‰ for DGJ-9. | Li et al. (2023), Boron isotope constraints on the migration and accumulation of rare alk… |
| −3.4 ± 2.5 ‰ | −6.2 / −1.9 ‰ | 3 | older recrystallized geyserite (quartz, calcite, kaolinite) Mean and standard deviation recalculated from 3 analyses, -6.2 to -1.9 (DGJ-13 quartz et calcite -6.2; DGJ-16 géysérite ancienne à quartz -1.9; DGJ-18 quartz et kaolinite -2.0). 36 to 459 µg/g B, 63 to 668 µg/g Cs: loss of light boron and Cs on dehydration. | Li et al. (2023), Boron isotope constraints on the migration and accumulation of rare alk… |
Deposits of the same type
- Central African Copperbelt (whole province) DR Congo and Zambia
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- Stelvio Italy
- Oris Italy
- Kupferschiefer, Lubin-Sieroszowice district Poland
- Timna Israël
- Datangpo-type manganese (Gaolou, Minle, Zhenxing) China
- Eyller Bruch bog iron ore Germany
Cite this page
IsoFind Atlas (2026). Dagejia (caesium geyserites), isotope signatures. https://www.isofind.tech/isotopes/en/deposits/dagejia-geyserites-a-cesium/ (accessed 2026-10-19).
@misc{isofind2026dagejiacaesiumgeyseritesisoto,
title = {Dagejia (caesium geyserites), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/dagejia-geyserites-a-cesium/},
note = {Accessed 2026-10-19}
}Updated : 2026-10-19