Dzhengutay section (Dagestan)
North-eastern Caucasus, Dagestan (Peri-Tethys), Russia
Sediments
- Type
- Sediment
Section of organic-rich mudrocks (up to 18 % organic carbon) from the Paleocene-Eocene Thermal Maximum (55.9 Ma) studied by Dickson et al. (2015) for seawater 187Os/188Os.
187Os/188Os isotope ratio, no unit Values of the same system
Standard : Rapport absolu, sans standard de référence
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 0.255 ± 0.035 | 0.23 / 0.279 | 2 | mudrock below the base of the carbon isotope excursion, initial ratio Mean and standard deviation recalculated from 2 analyses, 0.230 to 0.279 (DZ 9 0.230; DZ 12 0.279). Negative depths of the table, below the base of the carbon isotope excursion. The text says the lower levels were not sampled, but Table S1 lists three below 0 m; DZ 9 and DZ 12 are low (0.230 and 0.279). DZ 13 (initial ratio -0.084, 187Re/188Os 482) is left out: a negative ratio has no physical meaning. | Dickson et al. (2015), Evidence for weathering and volcanism during the PETM from Arctic … |
| 0.355 ± 0.018 | 0.327 / 0.389 | 9 | mudrock from the base of the carbon isotope excursion upwards, initial ratio Mean and standard deviation recalculated from 9 analyses, 0.327 to 0.389 (DZ 53 0.327; DZ 54 0.344; DZ 57 0.358; DZ 59 0.349; DZ 61 0.389; DZ 63 0.369; DZ 64 0.363; DZ 65 0.356; DZ 66 0.339). Rise up to 0.389 (DZ 61), consistent with the text. PETM isochron at 0.361 ± 0.020 (50 ± 14 Ma, MSWD 26), all data at 0.394 ± 0.049 (4 ± 18 Ma, MSWD 234). | Dickson et al. (2015), Evidence for weathering and volcanism during the PETM from Arctic … |
Deposits of the same type
- Pebble iron oxide precipitates United States
- Laohugou No. 12 Glacier cryoconite China
- Yuzhufeng Glacier cryoconite China
- Bayi Glacier cryoconite China
- Qiyi Glacier cryoconite China
- Yulong Snow Mountains glacier cryoconite China
- Hailuogou Glacier (Mount Gongga) cryoconite China
- Dangxiong Glacier cryoconite China
Cite this page
IsoFind Atlas (2026). Dzhengutay section (Dagestan), isotope signatures. https://www.isofind.tech/isotopes/en/sites/coupe-de-dzhengutay-daghestan/ (accessed 2026-10-20).
@misc{isofind2026dzhengutaysectiondagestanisot,
title = {Dzhengutay section (Dagestan), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/sites/coupe-de-dzhengutay-daghestan/},
note = {Accessed 2026-10-20}
}Updated : 2026-10-20