Radiocarbon ages, dose rates, water isotopic composition and hydrochemistry of samples from Komakuk Beach and Herschel Island ...

Terrestrial permafrost archives along the Yukon Coastal Plain (northwest Canada) have recorded landscape development and environmental change since the Late Wisconsinan at the interface of unglaciated Beringia (i.e. Komakuk Beach) and the northwestern limit of the Laurentide Ice Sheet (i.e. Herschel...

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Bibliographic Details
Main Authors: Fritz, Michael, Wetterich, Sebastian, Schirrmeister, Lutz, Meyer, Hanno, Lantuit, Hugues, Preusser, Frank, Pollard, Wayne H
Format: Article in Journal/Newspaper
Language:English
Published: PANGAEA 2012
Subjects:
International Polar Year 2007-2008 IPY
Permafrost Research Periglacial Dynamics @ AWI AWI_PerDyn
Herschel
Herschel Island
Ice
Ice Sheet
International Polar Year
IPY
permafrost
Beringia
Yukon
Online Access:https://dx.doi.org/10.1594/pangaea.809992
https://doi.pangaea.de/10.1594/PANGAEA.809992
Description
Summary:Terrestrial permafrost archives along the Yukon Coastal Plain (northwest Canada) have recorded landscape development and environmental change since the Late Wisconsinan at the interface of unglaciated Beringia (i.e. Komakuk Beach) and the northwestern limit of the Laurentide Ice Sheet (i.e. Herschel Island). The objective of this paper is to compare the late glacial and Holocene landscape development on both sides of the former ice margin based on permafrost sequences and ground ice. Analyses at these sites involved a multi-proxy approach including: sedimentology, cryostratigraphy, palaeoecology of ostracods, stable water isotopes in ground ice, hydrochemistry, and AMS radiocarbon and infrared stimulated luminescence (IRSL) dating. AMS and IRSL age determinations yielded full glacial ages at Komakuk Beach that is the northeastern limit of ice-free Beringia. Herschel Island to the east marks the Late Wisconsinan limit of the northwest Laurentide Ice Sheet and is composed of ice-thrust sediments containing ... : Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150 ...

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