Lago Pellegrini (bentonite)
Río Negro (Neuquén in Table 1), Argentina
Otherbentonite
- Type
- Bentonite (Na, Ca, Mg)
Smectite bentonite deposit. Mainly terrestrial deposition: distal littoral marine, supratidal and lacustrine setting, parent material rhyolitic to dacitic volcanics; lagoons, brines, brackish meteoric water, sea alteration; Campanian to Late Maastrichtian (80.3 to 76.2 Ma). Köster et al. (2019): δ11B of purified smectites and fluid δ11B calculated for trigonal or tetrahedral boron at 25 and 90 °C.
δ11B in ‰ (per mil) Values of the same system
Standard : NIST SRM 951
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −5.1 ± 6.9 ‰ | −11.1 / 0.2 ‰ | smectite (< 0.2 µm) treated with mannitol and ammonium-exchanged, structural boron Mean and standard deviation recalculated from the means of 2 samples: Arg1-A -9.9 (2SD 1.2, -11.1 to -9.2, 27.3 µg/g B); Arg11-A -0.2 (2SD 0.7, -0.6 to +0.2, 82.1 µg/g B). | Köster et al. (2019), The boron isotope geochemistry of smectites from sodium, magnesium … |
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). Lago Pellegrini (bentonite), isotope signatures. https://www.isofind.tech/isotopes/en/deposits/lago-pellegrini-bentonite/ (accessed 2026-10-20).
@misc{isofind2026lagopellegrinibentoniteisotop,
title = {Lago Pellegrini (bentonite), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/lago-pellegrini-bentonite/},
note = {Accessed 2026-10-20}
}Updated : 2026-10-20