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Be-10 in glacial marine sediment of the Ross Sea, Antarctica, a potential tracer of depositional environment and sediment chronology
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences. (Exogen geokemi)
Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, Tandem Laboratory.
2007 (English)In: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, ISSN 0168-583X, E-ISSN 1872-9584, Vol. 259, no 1, 576-583 p.Article in journal (Refereed) Published
Abstract [en]

Beryllium isotopes (9Be and 10Be) distribution in Holocene and late Pleistocene glacial ice and sediment facies from sub-ice stream and sub-ice shelf settings of the Ross sector of the West Antarctic Ice Sheet (WAIS) and from the open Ross Sea are presented, to assess the temporal and spatial variability of these tracers. Significant variation is detected (>one order of magnitude) among Holocene post-glacial deposits. Late Pleistocene diamictons from bathymetric lows in the Ross Sea show depleted concentrations that are less variable among sites and distinctly lower than bank deposits of similar age. In general, sub-ice shelf and ice stream sediments are the most depleted in 10Be. 10Be with its longer half-life and different pathways compared apparant to 14C is found to be a sensitive marker for evaluating the complex spatial and temporal relationships between texturally similar sediments formed by different depositional processes.

Place, publisher, year, edition, pages
2007. Vol. 259, no 1, 576-583 p.
Keyword [en]
10Be, Antarctica, Pleistocene, Holocene, Sediment, Accelerator mass spectrometry, Glacial, Ross Sea
National Category
Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:uu:diva-24804DOI: 10.1016/j.nimb.2007.01.203ISI: 000247535600104OAI: oai:DiVA.org:uu-24804DiVA: diva2:52578
Available from: 2008-05-15 Created: 2008-05-15 Last updated: 2017-12-07Bibliographically approved

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Aldahan, AlaPossnert, Göran

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Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
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