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(Article of periodic en Anglais - 2013)

Document title

Basin modelling of temperature and heat flow distributions and permafrost evolution, Urengoy and Kuyumbinskaya areas, Siberia

published at : The 50th Anniversary of the First International Conference on Permafrost and Beyond

Authors(s) and Affiliation(s)

GALUSHKIN Y.I. (1) ; SITAR K.A. (2) ; FROLOV S.V. (2) ;
(1) Lomonosow Moscow State Univ., Earth Science Museum, Moscou, RUSSIE, FEDERATION DE
(2) Lomonosow Moscow State Univ., Dept. of Geology, Moscou, RUSSIE, FEDERATION DE

Abstract

The thermal history and permafrost evolution in the Urengoy area of the West Siberian basin and in the Kuyumbinskaya area of the Siberian platform during the Pliocene-Quaternary were reconstructed numerically in a forward model from 3.4 Ma using the software package FROST, part of the basin modelling system GALO. Calculations suggest that variations in rock composition with depth strongly influenced permafrost evolution. The effect of cooling is greater in the Kuyumbinskaya area, which has a thinner sedimentary cover, than in the more northern Urengoy area. The model estimates permafrost depth and the stability zone of methane gas hydrate. An increase in salt content in porewater lowers the melting temperature of ice. The modelling demonstrates that permafrost thickness and temperature and heat flow distributions with depth in the basins calculated with climate variations of the last 50 ka differ significantly from the more accurate values obtained with climate variations during the last 200 ka, 1 Ma or 3.4 Ma

Source

Thematical fascicle

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

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

Millesime : 2013, vol. 24, no 4 [pp. 268-285]

Bibliographic references : 1 p.

Collation : fig., tabl.

Language

Anglais

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/ppp.1785

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
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