Tavush (bentonite)

Tavush, Arménie

Otherbentonite

Type: Bentonite (Na, Ca, Mg)

Smectite bentonite deposit. Mainly marine deposition: marine volcano-sedimentary, probably proximal setting, parent material rhyodacitic, dacitic and trachyandesitic tuffs; diagenesis or hydrothermal alteration; Late Santonian to Late Campanian. 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
−8.1 ± 0.4 ‰	−8.8 / −7.3 ‰		smectite (< 0.2 µm) treated with mannitol Single sample, published mean and 2SD (uncertainty halved to 1σ): B31-M -8.1 (2SD 0.8, -8.8 to -7.3, 55.3 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). Tavush (bentonite), isotope signatures. https://www.isofind.tech/isotopes/en/deposits/tavush-bentonite/ (accessed 2026-10-20).

@misc{isofind2026tavushbentoniteisotopesignatu,
  title = {Tavush (bentonite), isotope signatures},
  author = {{IsoFind Atlas}},
  year = {2026},
  url = {https://www.isofind.tech/isotopes/en/deposits/tavush-bentonite/},
  note = {Accessed 2026-10-20}
}

Updated : 2026-10-20