40Ar/39Ar Dates from the West Siberian Basin: Siberian Flood Basalt Province Doubled
40Ar/39Ar Dates from the West Siberian Basin: Siberian Flood Basalt Province Doubled
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DOI：
10.1126/science.1071671
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发表时间：
2002-06
期刊：
影响因子：
56.9
通讯作者：
M. Reichow;A. Saunders;R. White;M. Pringle;A. Al’mukhamedov;A. Medvedev;N. P. Kirda
中科院分区：
文献类型：
--
作者：
M. Reichow;A. Saunders;R. White;M. Pringle;A. Al’mukhamedov;A. Medvedev;N. P. Kirda
在二叠纪-三叠纪时期，俄罗斯中部的西西伯利亚盆地地区发生了广泛的玄武质火山活动。新的40 Ar/39 Ar年龄测定表明，盆地中的斜长石颗粒深钻孔玄武岩喷发249.4 ± 0.5百万年前。这与西伯利亚地台东部更远的西伯利亚圈闭的大部分喷发是同步的。年龄和地球化学数据证实，西西伯利亚盆地玄武岩是西伯利亚圈闭的一部分，至少是整个火山区面积的两倍。更大的火山活动区域加强了火山活动与二叠纪末大规模灭绝之间的联系。
Widespread basaltic volcanism occurred in the region of the West Siberian Basin in central Russia during Permo-Triassic times. New 40Ar/39Ar 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.