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(Article of periodic en Anglais - 2011)

Document title

Degradation of glacial deposits quantified with cosmogenic nuclides, Quartermain Mountains, Antarctica

Authors(s) and Affiliation(s)

MORGAN D.J. (1) ; PUTKONEN J. (2) ; BALCO G. (3) ; STONE J. (4) ;
(1) Department of Earth and Environmental Sciences, Vanderbilt University, Nashville, ETATS-UNIS
(2) Department of Geology and Geological Engineering, University of North Dakota,, Grand Forks, ETATS-UNIS
(3) Geochronology Center, Berkeley, ETATS-UNIS
(4) Department of Earth and Space Sciences, University of Washington, Seattle, ETATS-UNIS

Abstract

This paper presents results from using the concentration of cosmogenic nuclides beryllium-10 (10Be) and aluminum-26 (26Al) in bulk sediment samples from depth profiles of 3 glacial deposits in the Quartermain Mountains. The measured nuclide concentrations are lower than expected for the known ages of the deposits. Erosion alone does not always explain these concentrations, and deflation of the tills by the sublimation of ice coupled with erosion of the overlying till can explain some of the nuclide concentration profiles. Erosion of these tills without vertical mixing may partially explain how some glacial deposits in the Quartermain Mountains maintain their morphology and contain ground ice close to the surface for millions of years

Source

Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 2011, vol. 36, no2 [pp. 217-228]

Bibliographic references : 53 ref.

Collation : 7 fig., 2 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.2039

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2011
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