International Journal of Earth Sciences

, Volume 89, Issue 3, pp 563–568

Changes in the deposition of terrestrial organic matter on the Laptev Sea shelf during the Holocene: evidence from stable carbon isotopes

  • T. Mueller-Lupp
  • H. A. Bauch
  • H. Erlenkeuser
  • J. Hefter
  • H. Kassens
  • J. Thiede
Original Paper

DOI: 10.1007/s005310000128

Cite this article as:
Mueller-Lupp, T., Bauch, H., Erlenkeuser, H. et al. Int J Earth Sci (2000) 89: 563. doi:10.1007/s005310000128

Abstract.

Stable carbon isotope ratios in the organic fraction of surface sediments from the Laptev Sea shelf were analyzed in order to study the modern distribution pattern of terrestrial organic matter. The δ13Corg signature of the surface sediments range from –26.6‰ near the coastal margin to –22.8‰ in the north towards the outer shelf. Characterizing the possible sources of organic matter by their δ13Corg signature reveals that the terrestrial influence reaches further north in the eastern than in the western Laptev Sea. Downcore records of the δ13Corg, measured on three AMS 14C-dated cores from water depths between 46 and 77 m, specify the spatial and temporal changes in the deposition of terrestrial organic matter on the Laptev Sea shelf during the past 12.7 ka. The major depositional changes of terrestrial organic matter occurred between 11 and 7 ka and comprised the main phase of the southward retreat of the coastline and of the river depocenters due to the postglacial sea level rise.

Stable carbon isotopes Organic carbon Land-shelf interaction Holocene sediments Laptev Sea Siberia 

Copyright information

© Springer-Verlag 2000

Authors and Affiliations

  • T. Mueller-Lupp
    • 1
  • H. A. Bauch
    • 1
  • H. Erlenkeuser
    • 2
  • J. Hefter
    • 3
  • H. Kassens
    • 1
  • J. Thiede
    • 3
  1. 1.GEOMAR, Research Center for Marine Geosciences, Wischhofstrasse 1–3, 24148 Kiel, Germany
  2. 2.Leibniz Laboratory for Radiometric Dating and Stable Isotope Research, Kiel University, 24118 Kiel, Germany
  3. 3.Alfred Wegener Institute for Polar and Marine Research, 27515 Bremerhaven, Germany

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