Ar/[sup.39]Ar dates from the West Siberian Basin: Siberian flood basalt province doubled
Widespread basaltic volcanism occurred in the region of the West Siberian Basin in central Russia during Permo-Triassic times. New [sup.40]Ar/[sup.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...
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Published in | Science (American Association for the Advancement of Science) Vol. 296; no. 5574; pp. 1846 - 1849 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
American Association for the Advancement of Science
07.06.2002
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Subjects | |
Online Access | Get full text |
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Summary: | Widespread basaltic volcanism occurred in the region of the West Siberian Basin in central Russia during Permo-Triassic times. New [sup.40]Ar/[sup.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 [east 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. |
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ISSN: | 0036-8075 1095-9203 |
DOI: | 10.1126/science.1071671 |