Can in-situ cosmogenic 14C be used to assess the influence o

Details of Research

TitleCan in-situ cosmogenic 14C be used to assess the influence of clast recycling on exposure dating of ice retreat in Antarctica?AbstractCosmogenic nuclide exposure dating of glacial clasts is becoming a common and robust method for reconstructing the history of glaciers and ice sheets. In Antarctica, however, many samples exhibit cosmogenic nuclide 'inheritance' as a result of sediment recycling and exposure to cosmic radiation during previous ice free periods. In-situ cosmogenic 14C, in combination with longer lived nuclides such as 10Be, can be used to detect inheritance because the relatively short half-life of 14C means that in-situ 14C acquired in exposure during previous interglacials decays away while the sample locality is covered by ice during the subsequent glacial. Measurements of in-situ 14C in clasts from the last deglaciation of the Framnes Mountains in East Antarctica provide deglaciation ages that are concordant with existing 26Al and 10Be ages, suggesting that in this area, the younger population of erratics contain limited inheritance. Copyright 2011.AcknowledgementsR-HF is funded by a University of Glasgow Postgraduate Scholarship and a British Geological Survey e Universities Funding Initiative (BUFI) award. SUERC is supported by the Scottish Universities Consortium. In-situ 14C samples were analysed with the assistance of an Australian Academy of Science. Samples were collected with support from the Australian Antarctic Division (AAS1332 & AAS1071) and the Australian Research Council (DP0556728). Initial sample processing was funded by AINSE (AINGRA03048). We also thank B. Wagner and two anonymous reviewers for comments on a previous version of this manuscript.

Details

1st AuthorWhite, D.AuthorWhite, D.Fulop, R-H.Bishop, P.Mackintosh, A.Cook, G.Year2011JournalQuaternary GeochronologyVolume6Number3/04/2017Pages289-294DOI10.1016/j.quageo.2011.03.004URLhttps://www.scopus.com/inward/recor.....836d6df3521817cdfb12b888cKeywordsage determinationcarbon isotopeclastcosmogenic radionuclidedating methoddeglaciationgeochronologyglacier retreathalf life, AntarcticaEast Antarctica, rank1Author KeywordsAccelerator mass spectroscopyGlacierInheritanceMultiple isotope

Other

TypeArticleCitationWhite, D., Fülöp, R-H., Bishop, P., Mackintosh, A. and Cook, G. (2011) Can in-situ cosmogenic 14C be used to assess the influence of clast recycling on exposure dating of ice retreat in Antarctica?. Quaternary Geochronology, 6(3-4): 289-294 doi:10.1016/j.quageo.2011.03.004 IdentifierWhite2011Relevancerank1