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Sutorius, Mika; Struve, Torben; Gutjahr, Marcus; Lamy, Frank; Winckler, Gisela; Pahnke, Katharina (2024): Radiogenic isotopic signatures in the deep South Pacific during the Early and Middle Pliocene [dataset bundled publication]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.973001 (DOI registration in progress)

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Abstract:
The dataset contains Nd isotope signatures (expressed as εNd) and Pb isotopic ratios (206Pb/204Pb, 207Pb/204Pb, 208Pb/204Pb) for IODP Expedition 383 Sites U1540 and U1541 measured in fish debris, foraminifera and bulk leachates. The data covers the Early and Middle Pliocene from 3.2 to 5.2 Ma BP. Additionally, lithogenic εNd, Pb isotopic ratios (206Pb/204Pb, 207Pb/204Pb, 208Pb/204Pb), and Sr isotopic ratio (87Sr/86Sr) for the sortable silt fraction (<63 µm) for U1540 and U1541 are included. The obtained South Pacific εNd (authigenic) values for the Pliocene cover a range from εNd= -7.5 to -5.5 and with it are consistently more radiogenic than presently implying a changed deep water mass exchange. The authigenic Pb isotopic signatures lie in a range between 206Pb/204Pb=18.76 to 18.79 207Pb/204Pb=15.64 to 15.66 and 208Pb/204Pb= 38.70 to 38.78 and indicate changes in weathering input to the South Pacific.
Keyword(s):
Authigenic Pb and Nd; Nd isotope composition; Pb isotopes; Pliocene Paleoceanography; South Pacific
Project(s):
Integrated Ocean Drilling Program / International Ocean Discovery Program (IODP)
Coverage:
Median Latitude: -54.676939 * Median Longitude: -120.133887 * South-bound Latitude: -55.141287 * West-bound Longitude: -125.425718 * North-bound Latitude: -54.212588 * East-bound Longitude: -114.841993
Date/Time Start: 2019-06-10T14:30:00 * Date/Time End: 2019-06-20T05:00:00
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Size:
3 datasets

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Datasets listed in this bundled publication

  1. Sutorius, M; Struve, T; Gutjahr, M et al. (2024): Authigenic Nd and Pb isotopic composition of IODP Site sites 383-U1540. https://doi.pangaea.de/10.1594/PANGAEA.973003
  2. Sutorius, M; Struve, T; Gutjahr, M et al. (2024): Authigenic Nd and Pb isotopic composition of IODP Site sites 383-U1541. https://doi.pangaea.de/10.1594/PANGAEA.973004
  3. Sutorius, M; Struve, T; Gutjahr, M et al. (2024): Lithogenic isotopic signatures of IDOP sites 383-U1540 and 383-U1541. https://doi.pangaea.de/10.1594/PANGAEA.973002