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(Article of periodic en Anglais - 2011)

Document title

Origin and characteristics of massive ground ice on Herschel Island (western Canadian Arctic) as revealed by stable water isotope and Hydrochemical signatures

published at : Special Issue : Stable isotopes and geochemistry of ground ice

Authors(s) and Affiliation(s)

FRITZ M. (1) ; WETTERICH S. (1) ; MEYER H. (1) ; SCHIRRMEISTER L. (1) ; LANTUIT H. (1) ; POLLARD W.H. (2) ;
(1) Alfred Wegener Inst. for Polar and Marine Research, Research Unit, Potsdam, ALLEMAGNE
(2) Dep. of Geography and Global Environmental and Climate Change Centre, McGill Univ., Montreal, CANADA

Abstract

Herschel Island in the southern Beaufort Sea is a push moraine at the northwestern-most limit of the Laurentide Ice Sheet. Stable water isotope (δ18 O, δD) and hydrochemical studies were applied to two tabular massive ground ice bodies to unravel their genetic origin. Buried glacier ice or basal regelation ice was encountered beneath an ice-rich diamicton with strong glaciotectonic deformation structures. Both massive ground ice bodies exhibited a mixed ion composition suggestive of terrestrial waters with a marine influence. Hydrochemical signatures resemble the Herschel Island sediments that are derived from near-shore marine deposits upthrust by the Laurentide ice. A prolonged contact between water feeding the ice bodies and the surrounding sediment is therefore inferred

Source

Thematical fascicle

published at : Permafrost and periglacial processes / ISSN 1045-6740 / CODEN PEPPED

Editor : Wiley, Chichester - ROYAUME-UNI (1990)

Millesime : 2011, vol. 22, no 1 [pp. 26-38]

Bibliographic references : 51 ref.

Collation : fig., tabl.

Language

Anglais

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/ppp.714

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