Antuco
Salta, eastern Puna, Argentina
OtherB
- Type
- Active thermal-spring ulexite
Quaternary borate tied to a geyser or hot spring of the eastern Puna: ulexite interbedded with travertine, as a cone or platform around the vent, with tincalconite, pinnoite, inderite, halite and gypsum. Only spring still active, where ulexite precipitates today (fluid at -12.5 ‰, 570 mg/L B, pH 7.9, about 10 °C): basis of the empirical solution/ulexite factor of 1.0096 of Kasemann et al. (2004). Coordinates not published (map only).
δ11B in ‰ (per mil) Values of the same system
Standard : NIST SRM 951
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −22.1 ‰ | 1 | modern ulexite Single analysis (S1/92). | Kasemann et al. (2004), Boron isotope composition of geothermal fluids and borate mineral… |
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Cite this page
IsoFind Atlas (2026). Antuco, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/antuco/ (accessed 2026-10-19).
@misc{isofind2026antucoisotopesignatures,
title = {Antuco, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/antuco/},
note = {Accessed 2026-10-19}
}Updated : 2026-10-19