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Be-10 in glacial marine sediment of the Ross Sea, Antarctica, a potential tracer of depositional environment and sediment chronology
Ansvarlig organisasjon
2007 (engelsk)Inngår i: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, ISSN 0168-583X, E-ISSN 1872-9584, Vol. 259, nr 1, s. 576-583Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Beryllium isotopes ((9)Bc and Be-10) 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 Be-10. Be-10 with its longer half-life and different pathways compared apparant to C-14 is found to be a sensitive marker for evaluating the complex spatial and temporal relationships between texturally similar sediments formed by different depositional processes. (c) 2007 Elsevier B.V. All rights reserved.

sted, utgiver, år, opplag, sider
2007. Vol. 259, nr 1, s. 576-583
Emneord [en]
Be-10; antarctica; pleistocene; holocene; sediment; accelerator mass spectrometry; glacial; ross sea
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Identifikatorer
URN: urn:nbn:se:polar:diva-3179DOI: 10.1016/j.nimb.2007.01.203OAI: oai:DiVA.org:polar-3179DiVA, id: diva2:1049795
Merknad

10th International Conference on Accelerator Mass Spectrometry, Univ Calif Berkeley, Berkeley, CA, SEP 05-10, 2005

Tilgjengelig fra: 2016-11-25 Laget: 2016-11-21 Sist oppdatert: 2017-11-29

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