Stein, Ruediger; Frederichs, Thomas; Fahl, Kirsten; Geibert, Walter; Matthiessen, Jens; Niessen, Frank; Vogt, Christoph; Sassenroth, Cynthia; Bazhenova, Evgenia A: Radioactive isotope analysis of sediment core PS115/2_2 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.975840 (dataset in review), In: Stein, R et al.: A 430 kyrs multi-proxy record of Eurasian Ice Sheet history and organic carbon burial in the eastern Eurasian Basin, Arctic Ocean [dataset bundled publication]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.975790 (dataset in review)
Abstract:
Sediment Core PS115/2-2 was recovered from the Amundsen Basin in 3600 m water depth at the eastern flank of the Gakkel Ridge during Polarstern Expedition PS115/2 in 2018 (Stein, 2019). The well-dated core is used to reconstruct in detail the interrelationship between ice-sheet dynamics and organic carbon burial in the central Eurasian Basin during the last 430 kyr, and to correlate marine and terrestrial records of the Eurasian Ice Sheet (EIS) history. Our age model, a fundamental prerequisite for any kind of paleoclimatic reconstruction, is based on magnetostratigraphy, 230Th and 231Pa excess (230Thex and 231Paex) records, and AMS14C ages. The radioisotopes 230Th, 232Th, 231Pa, 234U and 235U (238U) were analysed by means of isotope dilution sector field ICP-mass spectrometry (SF-ICP-MS). As independent age control proxies, extinction ages of 230Thex and 231Paex have been determined (cf., Hillaire-Marcell et al., 2017; Geibert et al., 2021; Song et al., 2023). For details and methods, we refer to Stein et al. (this paper).
References:
Geibert, Walter; Matthiessen, Jens; Stimac, Ingrid; Wollenburg, Jutta Erika; Stein, Ruediger (2021): Glacial episodes of a freshwater Arctic Ocean covered by a thick ice shelf. Nature, https://doi.org/10.1038/s41586-021-03186-y
Hillaire-Marcel, Claude; Ghaleb, Bassam; de Vernal, Anne; Maccali, Jenny; Cuny, K; Jacobel, Allison W; Le Duc, Cynthia; McManus, Jerry F (2017): A new chronology of Late Quaternary sequences from the Central Arctic Ocean based on “Extinction Ages” of their excesses in 231Pa and 230Th. Geochemistry, Geophysics, Geosystems, 18(12), 4573-4585, https://doi.org/10.1002/2017GC007050
Song, Tengfei; Hillaire-Marcel, Claude; Liu, Yanguang; Ghaleb, Bassam; de Vernal, Anne (2023): Cycling and behavior of 230Th in the Arctic Ocean: Insights from sedimentary archives. Earth-Science Reviews, 244, 104514, https://doi.org/10.1016/j.earscirev.2023.104514
Stein, Ruediger (2019): The Expedition PS115/2 of the Research Vessel POLARSTERN to the Arctic Ocean in 2018. Berichte zur Polar- und Meeresforschung = Reports on Polar and Marine Research, 728, 249 pp, https://doi.org/10.2312/BzPM_0728_2019
Funding:
Coverage:
Median Latitude: 81.244115 * Median Longitude: 123.481940 * South-bound Latitude: 81.244100 * West-bound Longitude: 123.479940 * North-bound Latitude: 81.244130 * East-bound Longitude: 123.483940
Date/Time Start: 2018-09-14T14:49:00 * Date/Time End: 2018-09-14T17:41:00
Minimum DEPTH, sediment/rock: 0.01 m * Maximum DEPTH, sediment/rock: 7.54 m
Event(s):
PS115/2_2-1 * Latitude: 81.244130 * Longitude: 123.479940 * Date/Time: 2018-09-14T14:49:00 * Elevation: -3665.0 m * Location: Arctic Ocean * Campaign: PS115/2 * Basis: Polarstern * Method/Device: Giant box corer (GKG)
PS115/2_2-2 * Latitude: 81.244100 * Longitude: 123.483940 * Date/Time: 2018-09-14T17:41:00 * Elevation: -3669.0 m * Location: Arctic Ocean * Campaign: PS115/2 * Basis: Polarstern * Method/Device: Box corer (BC)
Parameter(s):
# | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
---|---|---|---|---|---|---|
1 | Event label | Event | Stein, Ruediger | |||
2 | DEPTH, sediment/rock | Depth sed | m | Stein, Ruediger | Geocode | |
3 | AGE | Age | ka BP | Stein, Ruediger | Geocode | |
4 | Thorium-232 | 232Th | dpm/g | Geibert, Walter | Isotope dilution, SF-ICP-MS | |
5 | Thorium-232, standard deviation | 232Th std dev | ± | Geibert, Walter | ||
6 | Thorium-230 | 230Th | dpm/g | Geibert, Walter | Isotope dilution, SF-ICP-MS | |
7 | Thorium-230, standard deviation | 230Th std dev | ± | Geibert, Walter | ||
8 | Thorium-230 excess | 230Th xs | dpm/g | Geibert, Walter | Isotope dilution, SF-ICP-MS | |
9 | Thorium-230 excess, standard deviation | 230Th xs std dev | ± | Geibert, Walter | ||
10 | Protactinium-231 | 231Pa | dpm/g | Geibert, Walter | Isotope dilution, SF-ICP-MS | |
11 | Protactinium-231, standard deviation | 231Pa std dev | ± | Geibert, Walter | ||
12 | Protactinium-231 excess | 231Pa xs | dpm/g | Geibert, Walter | Isotope dilution, SF-ICP-MS | |
13 | Protactinium-231 excess, standard deviation | 231Pa xs std dev | ± | Geibert, Walter | ||
14 | Uranium-234 | 234U | dpm/g | Geibert, Walter | Isotope dilution, SF-ICP-MS | the uranium fractions for the depths 232, 262, 288, 292, 298, 302, 322 and 332 cm were lost during analysis and were calculated by linear interpolation from neighboring depth intervals. |
15 | Uranium-234, standard deviation | 234U std dev | ± | Geibert, Walter | the uranium fractions for the depths 232, 262, 288, 292, 298, 302, 322 and 332 cm were lost during analysis and were calculated by linear interpolation from neighboring depth intervals. | |
16 | Uranium-238 | 238U | dpm/g | Geibert, Walter | Isotope dilution, SF-ICP-MS | the uranium fractions for the depths 232, 262, 288, 292, 298, 302, 322 and 332 cm were lost during analysis and were calculated by linear interpolation from neighboring depth intervals. |
17 | Uranium-238, standard deviation | 238U std dev | ± | Geibert, Walter | the uranium fractions for the depths 232, 262, 288, 292, 298, 302, 322 and 332 cm were lost during analysis and were calculated by linear interpolation from neighboring depth intervals. | |
18 | Uranium-235 | 235U | dpm/g | Geibert, Walter | Isotope dilution, SF-ICP-MS | the uranium fractions for the depths 232, 262, 288, 292, 298, 302, 322 and 332 cm were lost during analysis and were calculated by linear interpolation from neighboring depth intervals. |
19 | Uranium-235, standard deviation | 235U std dev | ± | Geibert, Walter | the uranium fractions for the depths 232, 262, 288, 292, 298, 302, 322 and 332 cm were lost during analysis and were calculated by linear interpolation from neighboring depth intervals. | |
20 | Uranium-234/Uranium-238 activity ratio | (234U/238U) | Geibert, Walter | Isotope dilution, SF-ICP-MS | the uranium fractions for the depths 232, 262, 288, 292, 298, 302, 322 and 332 cm were lost during analysis and were calculated by linear interpolation from neighboring depth intervals. | |
21 | Uranium-234/Uranium-238 activity ratio, standard deviation | (234U/238U) std dev | ± | Geibert, Walter | the uranium fractions for the depths 232, 262, 288, 292, 298, 302, 322 and 332 cm were lost during analysis and were calculated by linear interpolation from neighboring depth intervals. |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
2193 data points
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