Not logged in
PANGAEA.
Data Publisher for Earth & Environmental Science

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)

ShareShow MapGoogle Earth

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).
Keyword(s):
Arctic Ocean; Eurasian Ice Sheet History; Late Pleistocene; Organic carbon (OC) burial
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:
German Research Foundation (DFG), grant/award no. STE 412/30: ArcOP-Pilot
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):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEventStein, Ruediger
2DEPTH, sediment/rockDepth sedmStein, RuedigerGeocode
3AGEAgeka BPStein, RuedigerGeocode
4Thorium-232232Thdpm/gGeibert, WalterIsotope dilution, SF-ICP-MS
5Thorium-232, standard deviation232Th std dev±Geibert, Walter
6Thorium-230230Thdpm/gGeibert, WalterIsotope dilution, SF-ICP-MS
7Thorium-230, standard deviation230Th std dev±Geibert, Walter
8Thorium-230 excess230Th xsdpm/gGeibert, WalterIsotope dilution, SF-ICP-MS
9Thorium-230 excess, standard deviation230Th xs std dev±Geibert, Walter
10Protactinium-231231Padpm/gGeibert, WalterIsotope dilution, SF-ICP-MS
11Protactinium-231, standard deviation231Pa std dev±Geibert, Walter
12Protactinium-231 excess231Pa xsdpm/gGeibert, WalterIsotope dilution, SF-ICP-MS
13Protactinium-231 excess, standard deviation231Pa xs std dev±Geibert, Walter
14Uranium-234234Udpm/gGeibert, WalterIsotope dilution, SF-ICP-MSthe 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.
15Uranium-234, standard deviation234U std dev±Geibert, Walterthe 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.
16Uranium-238238Udpm/gGeibert, WalterIsotope dilution, SF-ICP-MSthe 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.
17Uranium-238, standard deviation238U std dev±Geibert, Walterthe 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.
18Uranium-235235Udpm/gGeibert, WalterIsotope dilution, SF-ICP-MSthe 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.
19Uranium-235, standard deviation235U std dev±Geibert, Walterthe 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.
20Uranium-234/Uranium-238 activity ratio(234U/238U)Geibert, WalterIsotope dilution, SF-ICP-MSthe 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.
21Uranium-234/Uranium-238 activity ratio, standard deviation(234U/238U) std dev±Geibert, Walterthe 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

Download Data (login required; moratorium until 2027-02-17)

Download dataset as tab-delimited text — use the following character encoding:

View dataset as HTML (shows only first 2000 rows)