Loma Blanca
Jujuy, northern Puna, southwest of Coranzulí volcano, Argentina
OtherB
- Type
- Neogene hot-spring borates (borax, ulexite, inyoite)
Puna Plateau (central Andes), internally drained basins filled since about 15 Ma; borates deposited since about 8 Ma by volcanism-related thermal springs. 30 m borate body formed by hot-spring water in a shallow basin between volcanic events, little deformed, primary structures preserved; main borax, ulexite and inyoite in vertical sequence, interbedded with clastic and pyroclastic rocks; teruggite, colemanite and tincalconite less common. Kasemann et al. (2004): successive precipitation, main mineralizing fluid near 0 ‰, heavier boron source (Mesozoic limestones or arc volcanic rocks). 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 |
|---|---|---|---|---|
| −0.3 ‰ | 1 | borax Single analysis. | Kasemann et al. (2004), Boron isotope composition of geothermal fluids and borate mineral… | |
| −6.3 ‰ | 1 | ulexite Single analysis. | Kasemann et al. (2004), Boron isotope composition of geothermal fluids and borate mineral… | |
| −12.7 ‰ | 1 | inyoite Single analysis. | Kasemann et al. (2004), Boron isotope composition of geothermal fluids and borate mineral… | |
| −16.2 ‰ | 1 | teruggite Single analysis. Probably secondary phase (alteration of the primary borates). | Kasemann et al. (2004), Boron isotope composition of geothermal fluids and borate mineral… |
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Cite this page
IsoFind Atlas (2026). Loma Blanca, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/loma-blanca/ (accessed 2026-10-19).
@misc{isofind2026lomablancaisotopesignatures,
title = {Loma Blanca, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/loma-blanca/},
note = {Accessed 2026-10-19}
}Updated : 2026-10-19