IGB

Connexion

(Article of periodic en Anglais - 2012)

Document title

Modern and Late Holocene retrogressive thaw slump activity on the Yukon Coastal Plain and Herschel Island, Yukon Territory, Canada

Authors(s) and Affiliation(s)

LANTUIT H. (1) ; POLLARD W.H. (2) ; COUTURE N. (2 3) ; FRITZ M. (1) ; SCHIRRMEISTER L. (1) ; MEYER H. (1) ; HUBBERTEN H.-W. (1) ;
(1) Alfred Wegener Inst. for Polar and Marine Research, Research Unit, Potsdam, ALLEMAGNE
(2) Dep. of Geography, McGill Univ., Montréal, CANADA
(3) Geological Survey of Canada, Natural resources, Ottawa, CANADA

Abstract

Four retrogressive thaw slumps (RTS) located on Herschel Island and the Yukon coast (King Point) were investigated to compare the environmental, sedimentological and geochemical setting and characteristics of zones in active and stabilised slumps and at undisturbed sites. In general, the slope, sedimentology and biogeochemistry of stabilised and undisturbed zones differ, independent of their age or location. Organic carbon contents were lower in slumps than in the surrounding tundra, and the density and compaction of slump sediments were much greater. Radiocarbon dating showed that RTS were likely to have been active around 300 a BP and are undergoing a similar period of increased activity now. This cycle is thought to be controlled more by local geometry, cryostratigraphy and the rate of coastal erosion than by variation in summer temperatures

Source

Article of periodic

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

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

Millesime : 2012, vol. 23, no1 [pp. 39-51]

Bibliographic references : 44 ref.

Collation : 10 fig., 5 tabl.

Language

Anglais

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/ppp.1731

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2012
Refdoc record number (ud4) : 25991727 : Permanent link - XML version
Powered by Pxxo