Can in situ cosmogenic 14C be used to assess the influence of clast recycling on exposure dating of ice retreat in Antarctica?

White, D., Fulop, R., 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), pp. 289-294. (doi:10.1016/j.quageo.2011.03.004)

White, D., Fulop, R., 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), pp. 289-294. (doi:10.1016/j.quageo.2011.03.004)

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Abstract

Cosmogenic 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 <sup>14</sup>C, in combination with longer lived nuclides such as <sup>10</sup>Be, can be used to detect inheritance because the relatively short half-life of <sup>14</sup>C 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 <sup>14</sup>C in clasts from the last deglaciation of the Framnes Mountains in East Antarctica provide deglaciation ages that are concordant with existing <sup>26</sup>Al and <sup>10</sup>Be ages, suggesting that in this area, the younger population of erratics contain limited inheritance.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Cook, Professor Gordon and Bishop, Professor Paul
Authors: White, D., Fulop, R., Bishop, P., Mackintosh, A., and Cook, G.
Subjects:Q Science > QE Geology
College/School:College of Science and Engineering > School of Geographical and Earth Sciences > Earth Sciences
Research Group:Earth Systems
Journal Name:Quaternary Geochronology
Journal Abbr.:Quat Geochron
Publisher:Elsevier BV
ISSN:1871-1014
Published Online:29 March 2011

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