Tincalayu
Salta, southern Puna, northwest of Salar del Hombre Muerto, Argentina
OtherB
- Type
- Neogene lacustrine borates (borax)
Puna Plateau (central Andes), internally drained basins filled since about 15 Ma; borates deposited since about 8 Ma by volcanism-related thermal springs. One of the largest borax deposits in the world: 30 m massive body between rock salt below and silts and sandstones above, deposited in a small closed lake fed by thermal springs, deformed and compacted; borax with minor kernite, rare ameghinite and rivadavite. Kasemann et al. (2004): mineralizing fluid near -11 ‰ (no solution-borax fractionation at pH 8.8), boron from the Paleozoic basement. 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 |
|---|---|---|---|---|
| −10 ± 0.4 ‰ | −10.5 / −9.7 ‰ | 3 | primary borax Mean and standard deviation recalculated from 3 analyses, -10.5 to -9.7 (-10.5; -9.9; -9.7). | Kasemann et al. (2004), Boron isotope composition of geothermal fluids and borate mineral… |
| −12.2 ‰ | 1 | tincalconite (borax dehydration) Single analysis. Secondary phase. | Kasemann et al. (2004), Boron isotope composition of geothermal fluids and borate mineral… | |
| −11.6 ‰ | 1 | kernite (borax diagenesis, base of the body) Single analysis. Secondary phase. | Kasemann et al. (2004), Boron isotope composition of geothermal fluids and borate mineral… | |
| −15.4 ‰ | 1 | inderite Single analysis. Probably secondary phase (alteration of the primary borates). | Kasemann et al. (2004), Boron isotope composition of geothermal fluids and borate mineral… |
Deposits of the same type
- Central African Copperbelt (whole province) DR Congo and Zambia
- Witwatersrand basin South Africa
- 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). Tincalayu, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/tincalayu/ (accessed 2026-10-19).
@misc{isofind2026tincalayuisotopesignatures,
title = {Tincalayu, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/tincalayu/},
note = {Accessed 2026-10-19}
}Updated : 2026-10-19