Zoulias (bentonite)
Milos (Cyclades), Greece
Otherbentonite
- Type
- Bentonite (Ca, Mg)
Smectite bentonite deposit. Mainly marine deposition: proximal marine volcano-sedimentary setting, parent material andesitic to dacitic pyroclastics; hydrothermal or seawater, 30 to 90 °C alteration; Pliocene to Pleistocene (3.5 to 0.09 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 |
|---|---|---|---|---|
| 18.4 ± 1.25 ‰ | 16.8 / 20.9 ‰ | smectite (< 0.2 µm) treated with mannitol Single sample, published mean and 2SD (uncertainty halved to 1σ): ZO-M +18.4 (2SD 2.5, +16.8 to +20.9, 26.2 µg/g B). | Köster et al. (2019), The boron isotope geochemistry of smectites from sodium, magnesium … | |
| 11.7 ± 2.3 ‰ | 9.4 / 14 ‰ | smectite (< 0.2 µm) treated with mannitol and ammonium-exchanged, structural boron Single sample, published mean and 2SD (uncertainty halved to 1σ): ZO-A +11.7 (2SD 4.6, +9.4 to +14.0, 14.6 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). Zoulias (bentonite), isotope signatures. https://www.isofind.tech/isotopes/en/deposits/zoulias-bentonite/ (accessed 2026-10-20).
@misc{isofind2026zouliasbentoniteisotopesignat,
title = {Zoulias (bentonite), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/zoulias-bentonite/},
note = {Accessed 2026-10-20}
}Updated : 2026-10-20