Late Pleistocene to early Holocene environmental changes on Store Koldewey, coastal north-east Greenland

Polar research

Ole Bennike¹  Martin Klug²  Bernd Wagner³ 

[1] Geological Survey of Denmark and Greenland, Øster Voldgade 10, DK-1350 Copenhagen, Denmark;Geological Survey of Norway, Leiv Eirikssons vei 39, NO-7040 Trondheim, NorwayCorrespondence;Institute of Geology and Mineralogy University of Cologne, Zülpicher Str. 49a, DE-50674 Köln, Germany

关键词: North-east Greenland;    Greenland Ice Sheet;    Last Glacial Maximum;    deglaciation;    lake sediment.;   

DOI  :  10.3402/polar.v35.21912

学科分类：自然科学（综合）

来源: Co-Action Publishing

【 摘 要 】

A lake sediment sequence from southern Store Koldewey, north-east Greenland, has been investigated using a multidisciplinary approach, including geophysical, geochemical, biogeochemical, biological and sedimentological methods. Chronological constraints are provided by accelerator mass spectrometry (AMS) 14C dating of bulk sediment and complemented with published water moss ages. The record consists of three major sediment units. Their individual structural, textural, geophysical and geochemical characteristics indicate variable input of sediment and meltwater due to variable proximity of the ice margin and therefore reflect the growth and decay of a local glacier during the late Weichselian. Radiocarbon dating of bulk sediment samples from the lowermost unit gave ages of 42 to 34 calibrated thousand years (cal Ky B.P.) and indicates that this material is redeposited in the lake basin during or after the ice advance at the end of the Pleistocene. Increased meltwater and sediment input from a retreating ic...

【 授权许可】

CC BY-NC