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(Article of periodic en Anglais - 1999)

Document title

Long-term rates of denudation in the Dry Valleys, Transantarctic Mountains, southern Victoria Land, Antarctica based on in-situ-produced cosmogenic 21Ne

published at : Cosmogenic isotopes in geomorphology

Abstract

Concentrations of cosmogenic 21Ne measured in quartz have been used to estimate long-term rates of denudation for contrasting landscape components in the Dry Valleys area. Samples of Beacon Supergroup sandstones and granitic basement were collected from 2 contrasting landscape elements to assess variations in rates of denudation with topographic position. The sample sites for rectilinear slopes were selected because of proximity to 40Ar/39Ar-dated lavas and ash-avalanche deposits. Combined with the preservation of volcanic deposits dating back to the mid-Miocene, these 21Ne data demonstrate that only minimal modification of the landscape has occurred in the Dry Valleys over at least the past 15 Ma

Source

Thematical fascicle

published at : Geomorphology / ISSN 0169-555X

Editor : Elsevier, Amsterdam - PAYS-BAS (1987)

Millesime : 1999, vol. 27, no 1-2 [pp. 113-129]

Bibliographic references : 52 ref.

Language

Anglais

INIST-CNRS, Cote INIST : 21151

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 1999.
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