A Stratigraphical-Sedimentological Study of the Last Interglacial Period in the Central Nordic Seas on the Basis of XRF Core Scanning (English)

In: Polarforschung   ;  87 ,  1  ;  15-22  ;  2017
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Abstract: The recognition of specific geological time intervals is one of the major issues when establishing the stratigraphies of marine sediment cores. The automatic XRF core scanning method provides a fast and non-destructive method to precisely identify a given time interval and its changeable sedi- mentation histories. To test the applicability of XRF core scanning to recog- nize such periods, we studied in detail sedimentation processes across the last interglacial climate cycle (MIS 5e) on unsampled sediment core section from the central Nordic Seas – an area of high interest for paleoceanographic reconstructions. To further ground truth the XRF scanning results the core was sampled and the contents of iceberg-rafted debris (IRD) and shards of tephra were quantified. On that basis we identified Ti/Ca ratios as a potential indicator for IRD depositional peaks, and Ca as indicator of high biogenic carbonate production. Two well-known tephras from MIS 5e, Midt-RHY and 5e-low/Bas-IV, could be identified based on specific elemental content, such as Si, Ti, Zr, and Rb. By cross-core correlations using Ca-content and IRD-counts, the iceberg-free interval with enhanced deposition of biogenic carbonate lasted for about 9 ky, with a return of significant iceberg presence around 115 ka, notifying the onset of the last glacial inception. According to the age model applied we could further define the age of the 5e-Midt-RHY tephra at ~121.5 ka and of the 5e-low/Bas-IV at ~125.5 ka.

  • Title:
    A Stratigraphical-Sedimentological Study of the Last Interglacial Period in the Central Nordic Seas on the Basis of XRF Core Scanning
  • Author / Creator:
  • Published in:
    Polarforschung ; 87 ; 1 ; 15-22
  • Publisher:
    Alfred-Wegener-Institut für Polar- und Meeresforschung und Deutsche Gesellschaft für Polarforschung 
  • Place of publication:
    Bremerhaven, Germany
  • Year of publication:
    2017
  • Size:
    8 pages
  • ISSN:
  • DOI:
  • Type of media:
    Article (Journal)
  • Type of material:
    Electronic Resource
  • Language:
    English
  • Classification:
    DDC:    550 Earth sciences and geology
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Table of contents – Volume 87, Issue 1

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The tables of contents are generated automatically and are based on the data records of the individual contributions available in the index of the TIB portal. The display of the Tables of Contents may therefore be incomplete.

1
The Climate of the Arctic: an Early Warning System for Global Warming
Wilhelm, Gernot | 2017
3
Pathways of Siberian Freshwater and Sea Ice in the Arctic Ocean Traced with Radiogenic Neodymium Isotopes and Rare Earth Elements
Laukert, Georgi / Frank, Martin / Hathorne, Ed C / Krumpen, Thomas / Rabe, Ben / Bauch, Dorothea / Werner, Kirstin / Peeken, Ilka / Kassens, Heidemarie | 2017
15
A Stratigraphical-Sedimentological Study of the Last Interglacial Period in the Central Nordic Seas on the Basis of XRF Core Scanning
Kolling, Henriette / Bauch, A Henning | 2017
23
Case Studies of the Role of Arctic Gateways in Plio-Pleistocene Arctic Changes
Spielhagen, Robert F | 2017
33
Interactions between the Arctic Ocean and the Siberian Hinterland during the Late Mesozoic and the Cenozoic and Their Impact on the Ice Covers
Tiede, Jörn | 2017
43
Arctic Glacial and Interglacial Variability throughout the Quaternary: Evidence from Lake El'gygytgyn, northeastern Russia
Melles, Martin / Wennrich, Volker | 2017
61
From Greenhouse to Icehouse: The late Mesozoic-Cenozoic Arctic Ocean Sea Ice and Climate History
Stein, Rüdiger | 2017