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(Article of periodic en Anglais - 2011)

Document title

On the δO 18, δD and D-excess relations in meteoric precipitation and during equilibrium freezing: theoretical approach and field examples

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

Authors(s) and Affiliation(s)

LACELLE D. (1) ;
(1) Dep. of Earth Sciences, Univ., Ottawa, CANADA

Abstract

This study reviews the principles of fractionations affecting δD, δO 18 and deuterium excess (d) in meteoric precipitation and during equilibrium freezing of water under changing freezing rates. Many studies are starting to use the calculation of d to infer the origin of subsurface ice. However, d values do not provide much information on the origin of subsurface ice, as d is dependent on freezing conditions. To make proper use of d, its relation with D needs to be investigated, with no relation reflecting meteoric precipitation and a negative relation indicative of freezing. In all cases, it is recommended that stable O-H isotope measurements be supported by additional distinguishing tools (i.e. entrapped gases) when attempting to infer subsurface ice types

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. 13-25]

Bibliographic references : 37 ref.

Collation : fig., tabl.

Language

Anglais

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/ppp.712

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