IGB

Connexion

(Article of periodic en Anglais - 2013)

Document title

Groundwater hydrology and stable isotope analysis of an open-system pingo in northwestern Mongolia

Authors(s) and Affiliation(s)

YOSHIKAWA K. (1) ; SHARKHUU N. (2) ; SHARKHUU A. (3) ;
(1) Water and Environmental Research Center, Univ. of Alaska, Fairbanks, ETATS-UNIS
(2) Mongolian Academy of Science, Ullanbaator, MONGOLIE
(3) Dep. of Earth and Environmental Science, Univ. of Pennsylvania, Philadelphia, ETATS-UNIS

Abstract

The first record of stable isotopes through a complete sequence of ice within an open-system pingo in northwestern Mongolia indicates a complex history of ice formation and pingo growth. A continuous section of ice 32 m long was cored through the centre of Mongot Pingo, and ice cores were analysed for stable isotopes and chemical composition. Two different stable isotope patterns in separate ice sections are identified : 1) open-system freezing and 2) semi-closed system (or closed system) freezing. Discharge measurements were observed in 2009 after drilling through pingo ice to artesian sub-pingo water and compared with data collected from the same pingo in 1968. It is shown that the major mechanism for ice formation at this pingo is groundwater artesian pressure, though not continuously. Four major stages of pingo growth after 8790 yr BP are inferred

Source

Article of periodic

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

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

Millesime : 2013, vol. 24, no3 [pp. 175-183]

Bibliographic references : 12 ref.

Collation : 5 fig., 2 tabl.

Language

Anglais

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/ppp.1773

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2013
Refdoc record number (ud4) : 28016214 : Permanent link - XML version
Powered by Pxxo