40 Ar/ 39 Ar Dates from the West Siberian Basin: Siberian Flood Basalt Province Doubled-Reference-Cited by-同舟云学术

40 Ar/ 39 Ar Dates from the West Siberian Basin: Siberian Flood Basalt Province Doubled

Published:2002-06-07 Issue:5574 Volume:296 Page:1846-1849
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Reichow Marc K.¹,Saunders Andrew D.¹,White Rosalind V.¹,Pringle Malcolm S.²,Al'Mukhamedov Alexander I.³,Medvedev Alexander I.³,Kirda Nikolay P.⁴

Affiliation:

1. Department of Geology, University of Leicester, Leicester LE1 7RH, UK.

2. Scottish Universities Environmental Research Centre (SUERC), Scottish Enterprise Technology Park, Rankine Avenue, East Kilbride G75 0QF, UK.

3. Institute of Geochemistry, Favorsky Street, Post Office Box 4019, Irkutsk 664033, Russia.

4. Institute of Geology Oil and Gas, Koptyug Avenue 3, Novosibirsk 630090, Russia.

Abstract

Widespread basaltic volcanism occurred in the region of the West Siberian Basin in central Russia during Permo-Triassic times. New 40 Ar/ 39 Ar age determinations on plagioclase grains from deep boreholes in the basin reveal that the basalts were erupted 249.4 ± 0.5 million years ago. This is synchronous with the bulk of the Siberian Traps, erupted further east on the Siberian Platform. The age and geochemical data confirm that the West Siberian Basin basalts are part of the Siberian Traps and at least double the confirmed area of the volcanic province as a whole. The larger area of volcanism strengthens the link between the volcanism and the end-Permian mass extinction.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference40 articles.

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