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Maier, Edith; Chapligin, Bernhard; Abelmann, Andrea; Gersonde, Rainer; Esper, Oliver; Ren, Jian; Friedrichsen, Hans; Meyer, Hanno; Tiedemann, Ralf (2013): Palaeoceanographic data of sediment core MD01-2416 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.834257, Supplement to: Maier, E et al. (2013): Combined oxygen and silicon isotope analysis of diatom silica from a deglacial subarctic Pacific record. Journal of Quaternary Science, 28(6), 571-581, https://doi.org/10.1002/jqs.2649

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Abstract:
We present an SiF4 separation line, coupled to a laser fluorination system, which allows for an efficient combined silica d18O and d30Si analysis (50 min per sample). The required sample weight of 1.5-2.0 mg allows for high-resolution isotope studies on biogenic opal. Besides analytical tests, the new instrumentation set-up was used to analyse two marine diatom fractions (>63 µm, 10-20 µm) with different diatom species compositions extracted from a Bølling/Allerød-Holocene core section [MD01-2416, North-West (NW) Pacific] to evaluate the palaeoceanographic significance of the diatom isotopic signals and to address isotopic effects related to contamination and species-related isotope effects (vital and environmental effects). While d30Si offsets between the two fractions were not discernible, supporting the absence of species-related silicon isotope effects, systematic offsets occur between the d18O records. Although small, these offsets point to species-related isotope effects, as bias by contamination can be discarded. The new records strengthen the palaeoceanographic history during the last deglaciation in the NW Pacific characterized by a sequence of events with varying surface water structure and biological productivity. With such palaeoceanographic evolution it becomes unlikely that the observed systematic d18O offsets signal seasonal temperature variability. This calls for reconsideration of vital effects, generally excluded to affect d18O measurements.
Project(s):
Paleoenvironmental Reconstructions from Marine Sediments @ AWI (AWI_Paleo)
Coverage:
Latitude: 51.268000 * Longitude: 167.725000
Date/Time Start: 2001-06-09T20:05:00 * Date/Time End: 2001-06-09T20:05:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
5 datasets

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Datasets listed in this publication series

  1. Maier, E; Chapligin, B; Abelmann, A et al. (2013): (Table S2 A) Composition of purified diatom samples of the >63 µm fraction determined by light microscopy of sediment core MD01-2416. https://doi.org/10.1594/PANGAEA.834255
  2. Maier, E; Chapligin, B; Abelmann, A et al. (2013): (Table S2 B) Composition of purified diatom samples of the 10-20 µm fraction determined by light microscopy of sediment core MD01-2416. https://doi.org/10.1594/PANGAEA.834256
  3. Maier, E; Chapligin, B; Abelmann, A et al. (2013): (Table S1) Elemental compositions determined by EDS and ICP-OES analysis of the 10-20 µm and >63 µm fraction of sediment core MD01-2416. https://doi.org/10.1594/PANGAEA.834254
  4. Maier, E; Chapligin, B; Abelmann, A et al. (2013): (Table 3) Offsets of isotopic values, in non-biogenic silica contamination and differences in the relative abundance of spring/summer species in sediment core MD01-2416. https://doi.org/10.1594/PANGAEA.834253
  5. Maier, E; Chapligin, B; Abelmann, A et al. (2013): (Table 2) Oxygen and silicon stable isotopes of diatom silica of sediment core MD01-2416. https://doi.org/10.1594/PANGAEA.834252