Mittersberg (bentonite)
Bavaria, Landshut area, Germany
Otherbentonite
- Type
- Bentonite (Ca, Mg)
Smectite bentonite deposit. Mainly terrestrial deposition: distal fresh to brackish fluvial-lacustrine setting, parent material rhyolitic ash; soil, wetland and groundwater, 15 to 40 °C alteration; Middle Miocene (14.77 ± 0.03 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 |
|---|---|---|---|---|
| −11.6 ± 1.25 ‰ | −19 / −4.1 ‰ | smectite (< 0.2 µm) treated with mannitol Single sample, published mean and 2SD (uncertainty halved to 1σ): MB34-M -11.6 (2SD 2.5, -19.0 to -4.1, 23.1 µg/g B). | Köster et al. (2019), The boron isotope geochemistry of smectites from sodium, magnesium … | |
| −5.9 ± 0.95 ‰ | −6.9 / −5 ‰ | smectite (< 0.2 µm) treated with mannitol and ammonium-exchanged, structural boron Single sample, published mean and 2SD (uncertainty halved to 1σ): MB34-A -5.9 (2SD 1.9, -6.9 to -5.0, 16.7 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). Mittersberg (bentonite), isotope signatures. https://www.isofind.tech/isotopes/en/deposits/mittersberg-bentonite/ (accessed 2026-10-20).
@misc{isofind2026mittersbergbentoniteisotopesi,
title = {Mittersberg (bentonite), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/mittersberg-bentonite/},
note = {Accessed 2026-10-20}
}Updated : 2026-10-20