Hingst, Johanna; Stein, Ruediger; Kasemann, Simone A: Late Quaternary Sr-Nd-Pb isotope composition of the siliciclastic sediment fraction of the marine sediment core PS72/287-3 from Barrow Strait, Canadian Arctic Archipelago [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.962323 (dataset in review)
Abstract:
The Sr-Nd-Pb isotope composition of siliciclastic sediments from the marine sediment core PS72/287-3 from Barrow Strait was analyzed to identify changing sediment provenances during the last deglaciation and the Holocene. Barrow Strait was blocked by the confluent Laurentide and Innuitian ice sheets during the last glacial period and is hence very interesting to study deglaciation processes in the Canadian Arctic. Varying Sr and Nd isotope ratios during the deglacial period suggest changing sediment sources probably related to ice sheet dynamics and sediment transport processes. After the deglacial period, radiogenic isotope ratios evolved less variable, indicating just slight changes in sediment provenance related to more stable environmental conditions during the Holocene.
Sample preparation and radiogenic isotope analysis were conducted in the laboratories of the Isotope Geochemistry Group at MARUM – Center for Marine Environmental Sciences, University of Bremen, Germany. Sediment samples were leached using a NaOH-buffered solution of hydroxylamine hydrochloride and 15% acetic acid in order to separate the siliciclastic sediment fraction (adapted from Gutjahr et al. 2007, https://doi.org/10.1016/j.chemgeo.2007.03.021). Using a Thermo-Fisher Scientific TRITON Plus thermal ionization mass spectrometer (TIMS), the isotope ratios were determined after the elements had been separated by column chemistry.
Keyword(s):
Related to:
Okuma, Emmanuel; Hingst, Johanna; Weiser, Jens; Madaj, Lina; Titschack, Jürgen; Vogt, Christoph; Kienast, Markus; Hillaire-Marcel, Claude; Hebbeln, Dierk; Kasemann, Simone A (2023): Deglacial and Holocene sediment dynamics and provenances off Lancaster Sound: Implications for paleoenvironmental conditions in northern Baffin Bay. Quaternary Science Reviews, 309, 108101, https://doi.org/10.1016/j.quascirev.2023.108101
Project(s):
Funding:
German Research Foundation (DFG), grant/award no. 221211316: GRK/IRTG 1904: ArcTrain - Processes and impacts of climate change in the North Atlantic Ocean and the Canadian Arctic
Coverage:
Latitude: 74.266000 * Longitude: -90.985200
Date/Time Start: 2008-08-21T14:16:00 * Date/Time End: 2008-08-21T14:16:00
Minimum DEPTH, sediment/rock: 0.10 m * Maximum DEPTH, sediment/rock: 4.50 m
Event(s):
PS72/287-3 * Latitude: 74.266000 * Longitude: -90.985200 * Date/Time: 2008-08-21T14:16:00 * Elevation: -337.0 m * Penetration: 5 m * Recovery: 4.63 m * Location: Northwestern Passages * Campaign: ARK-XXIII/3 (PS72) * Basis: Polarstern * Method/Device: Gravity corer (GC) * Comment: 5 core sections: 0-0.7, 0.7-1.71, 1.71-2.72, 2.72-3.73, 3.73-4.63 m
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Hingst, Johanna | Geocode | |
| 2 | Sample code/label | Sample label | Hingst, Johanna | |||
| 3 | Strontium-87/Strontium-86 ratio | 87Sr/86Sr | Hingst, Johanna | Thermal ionization mass spectrometer, Thermo-Fisher Scientific, TRITON Plus | siliciclastic sediment fraction, <63 µm size fraction; measured in static multicollection mode, alongside standard NIST SRM 987 | |
| 4 | Strontium-87/Strontium-86 ratio, standard deviation | 87Sr/86Sr std dev | ± | Hingst, Johanna | Thermal ionization mass spectrometer, Thermo-Fisher Scientific, TRITON Plus | 2 std dev mean, siliciclastic sediment fraction, <63 µm size fraction; measured in static multicollection mode, alongside standard NIST SRM 987 |
| 5 | Neodymium-143/Neodymium-144 ratio | 143Nd/144Nd | Hingst, Johanna | Thermal ionization mass spectrometer, Thermo-Fisher Scientific, TRITON Plus | siliciclastic sediment fraction, <63 µm size fraction; measured in static multicollection mode, alongside standard NIST SRM 987 | |
| 6 | Neodymium-143/Neodymium-144 ratio, standard deviation | 143Nd/144Nd std dev | ± | Hingst, Johanna | Thermal ionization mass spectrometer, Thermo-Fisher Scientific, TRITON Plus | 2 std dev mean, siliciclastic sediment fraction, <63 µm size fraction; measured in static multicollection mode, alongside standard NIST SRM 987 |
| 7 | ε-Neodymium | ε-Nd | Hingst, Johanna | Calculated relative to the Chondritic Uniform Reservoir (CHUR) value of 143Nd/144Nd=0.512638 according to Jacobsen and Wasserburg (1980) | ||
| 8 | Lead-206/Lead-204 ratio | 206Pb/204Pb | Hingst, Johanna | Thermal ionization mass spectrometer, Thermo-Fisher Scientific, TRITON Plus | siliciclastic sediment fraction, <63 µm size fraction; measured in static multicollection mode, alongside standard NIST SRM 987 | |
| 9 | Lead-206/Lead-204 ratio, standard deviation | 206Pb/204Pb std dev | ± | Hingst, Johanna | Thermal ionization mass spectrometer, Thermo-Fisher Scientific, TRITON Plus | 2 std dev mean, siliciclastic sediment fraction, <63 µm size fraction; measured in static multicollection mode, alongside standard NIST SRM 987 |
| 10 | Lead-206/Lead-204 ratio | 206Pb/204Pb | Hingst, Johanna | Corrected by a bulk uncertainty of 0.1 % per atomic mass unit | ||
| 11 | Lead-207/Lead-204 ratio | 207Pb/204Pb | Hingst, Johanna | Thermal ionization mass spectrometer, Thermo-Fisher Scientific, TRITON Plus | siliciclastic sediment fraction, <63 µm size fraction; measured in static multicollection mode, alongside standard NIST SRM 987 | |
| 12 | Lead-207/Lead-204 ratio, standard deviation | 207Pb/204Pb std dev | ± | Hingst, Johanna | Thermal ionization mass spectrometer, Thermo-Fisher Scientific, TRITON Plus | 2 std dev mean, siliciclastic sediment fraction, <63 µm size fraction; measured in static multicollection mode, alongside standard NIST SRM 987 |
| 13 | Lead-207/Lead-204 ratio | 207Pb/204Pb | Hingst, Johanna | Corrected by a bulk uncertainty of 0.1 % per atomic mass unit |
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:
192 data points