Black Sea, deep euxinic sediments (KNR 134 39 BC 21 box core)
Black Sea, abyssal plain
Sediments
- Type
- Sediment
Sediments deposited below 2092 m of sulphidic water, from 1 to 49 cm depth, with 0.54 to 0.84 % pyrite sulphur. The authigenic fraction (pyrite, mean -2.3) reproduces Black Sea surface water (-2.2): water-column Tl is removed almost quantitatively by pyrite, so euxinic sediments record the ε205Tl of basin seawater. Silicate fraction about -2.0, like the continental crust (Owens et al., 2017). Coordinates from Table 1.
ε205Tl in ε units (parts per 10,000) Values of the same system
Standard : NIST SRM 997
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −2 ± 0.5 ε | 4 | authigenic fraction of the 1-2 cm level Published mean of 4 analyses (2 SD); 291 ng/g Tl; 0.62 % pyrite sulphur; measured bulk at -2.2 (375 ng/g, single analysis). | Owens et al. (2017), Thallium-isotopic compositions of euxinic sediments as a proxy for g… | |
| −1.9 ± 0.2 ε | 4 | silicate fraction of the 1-2 cm level Published mean of 4 analyses (2 SD); 168 ng/g Tl. | Owens et al. (2017), Thallium-isotopic compositions of euxinic sediments as a proxy for g… | |
| −2.2 ± 0.1 ε | 2 | authigenic fraction of the 2-3 cm level Published mean of 2 analyses (2 SD); 402 ng/g Tl; 0.84 % pyrite sulphur; measured bulk at -2.7 (463 ng/g, single analysis). | Owens et al. (2017), Thallium-isotopic compositions of euxinic sediments as a proxy for g… | |
| −2.3 ± 0.2 ε | 4 | silicate fraction of the 2-3 cm level Published mean of 4 analyses (2 SD); 183 ng/g Tl. | Owens et al. (2017), Thallium-isotopic compositions of euxinic sediments as a proxy for g… | |
| −2.2 ± 0.1 ε | 4 | authigenic fraction of the 3-4 cm level Published mean of 4 analyses (2 SD); 353 ng/g Tl; 0.56 % pyrite sulphur; measured bulk at -2.2 (375 ng/g, single analysis). | Owens et al. (2017), Thallium-isotopic compositions of euxinic sediments as a proxy for g… | |
| −1.8 ± 0.5 ε | 4 | silicate fraction of the 3-4 cm level Published mean of 4 analyses (2 SD); 164 ng/g Tl. | Owens et al. (2017), Thallium-isotopic compositions of euxinic sediments as a proxy for g… | |
| −2.4 ± 0.1 ε | 4 | authigenic fraction of the 30-31 cm level Published mean of 4 analyses (2 SD); 119 ng/g Tl; 0.54 % pyrite sulphur; measured bulk at -2.4 (379 ng/g, single analysis). | Owens et al. (2017), Thallium-isotopic compositions of euxinic sediments as a proxy for g… | |
| −1.9 ± 0.1 ε | 4 | silicate fraction of the 30-31 cm level Published mean of 4 analyses (2 SD); 416 ng/g Tl. | Owens et al. (2017), Thallium-isotopic compositions of euxinic sediments as a proxy for g… | |
| −2.8 ± 0.1 ε | 3 | authigenic fraction of the 48-49 cm level Published mean of 3 analyses (2 SD); 584 ng/g Tl; 0.7 % pyrite sulphur; measured bulk at -2.9 (402 ng/g, single analysis). | Owens et al. (2017), Thallium-isotopic compositions of euxinic sediments as a proxy for g… | |
| −2 ± 0.2 ε | 2 | silicate fraction of the 48-49 cm level Published mean of 2 analyses (2 SD); 67 ng/g Tl. | Owens et al. (2017), Thallium-isotopic compositions of euxinic sediments as a proxy for g… |
Deposits of the same type
- Ponturin and Arc stream sediments at Peisey-Nancroix France
- Peisey-Nancroix mine dewatering gallery sediments France
- Gardon sedimentary archive (flood terrace, GE core) France
- Digonnière peatland (Dig1Ter core) France
- Gardon mining tributary sediments (November 2011) France
- Present-day Gardon sediments (main stream, November 2011) France
- Scheldt estuary Netherlands
- Riou Mort and Riou Viou upstream of the Viviez plant France
Cite this page
IsoFind Atlas (2026). Black Sea, deep euxinic sediments (KNR 134 39 BC 21 box core), isotope signatures. https://www.isofind.tech/isotopes/en/sites/mer-noire-sediments-euxiniques-profonds-carottier-knr-134-39-bc-21/ (accessed 2026-10-16).
@misc{isofind2026blackseadeepeuxinicsedimentsk,
title = {Black Sea, deep euxinic sediments (KNR 134 39 BC 21 box core), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/sites/mer-noire-sediments-euxiniques-profonds-carottier-knr-134-39-bc-21/},
note = {Accessed 2026-10-16}
}Updated : 2026-10-16