Mots-clés
Analyse isotopique ; Arctique ; Canada ; Coin de glace ; Datation C 14 ; Glace du sol ; Géochimie ; Oxygène 18 ; Pergélisol ; Pingo ; Région polaire ; Zone froideArctic Region ; C 14 dating ; Canada ; Cold area ; Geochemistry ; Ground ice ; Ice wedge ; Isotope analysis ; Oxygen 18 ; Permafrost ; Pingo ; Polar regionAnálisis isotópico ; Canada ; Cuña de hielo ; DataciónCarbono 14 ; Geoquímica ; Hielo del suelo ; Oxígeno 18 ; Pergelisol ; Pingo ; Región polar ; Zona fría ; ÁrticaIsotope characterisation of ground ice in northern Canada
Special Issue : Stable isotopes and geochemistry of ground ice
Auteur(s) et Affiliation(s)
MICHEL, F.A.
Dep. of Earth Sciences, Carleton Univ., Ottawa, Canada
MEYER, H.
Alfred Wegener Inst. for Polar and Marine Research, Research Unit, Potsdam, Allemagne
SLETTEN, R.S.
Univ. of Washington, Seattle, Etats-Unis
Description :
This paper reviews isotopic research on the characterisation and identification of various types of ground ice throughout the Canadian Arctic, including buried glacier ice, massive segregated ice, segregated ice lenses and offshore ice-rich permafrost, as well as ice related to other cold-region phenomena such as ice wedges, icings (aufeis), frost blisters and pingos. The formational age of ground ice bodies ranges from recent (seasonal ice in the active layer) to tens of thousands of years, when the region experienced widespread continental-scale glaciation. The ratios O 18/O 16 are analysed. Placing the ice bodies into a time frame can be accomplished either through age dating of the enclosing sediments and encased organics, or by direct dating of the ice utilising tritium (3H) for relatively young ice and radiocarbon (14C) analysis of contained gas bubbles for older ice.
Type de document :
Article de monographie
Source :
Permafrost and periglacial processes, issn : 1045-6740, 2011, vol. 22, n°. 1, p. 3-12, nombre de pages : 10, Références bibliographiques : 9 ref.
Date :
2011
Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley
Langue :
Anglais
Anglais
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)