Science. 1991 Jul 12;253(5016):176-9. doi: 10.1126/science.253.5016.176.
The Siberian Traps represent one of the most voluminous flood basalt provinces on Earth. Laser-heating (40)Ar/(39)Ar data indicate that the bulk of these basalts was erupted over an extremely short time interval (900,000 +/- 800,000 years) beginning at about 248 million years ago at mean eruption rates of greater than 1.3 cubic kilometers per year. Such rates are consistent with a mantle plume origin. Magmatism was not associated with significant lithospheric rifting; thus, mantle decompression resulting from rifting was probably not the primary cause of widespread melting. Inception of Siberian Traps volcanism coincided (within uncertainty) with a profound faunal mass extinction at the Permo-Triassic boundary 249 +/- 4 million years ago; these data thus leave open the question of a genetic relation between the two events.
西伯利亚地盾是地球上最大的火山玄武岩省之一。激光加热 (40)Ar/(39)Ar 数据表明，这些玄武岩的大部分是在大约 2.48 亿年前开始在一个非常短的时间间隔内（900 万年 +/- 800 万年）喷发的，平均喷发率大于每年 1.3 立方公里。这种速度与地幔柱起源一致。岩浆活动与显著的岩石圈裂谷无关；因此，裂谷引起的地幔减压可能不是广泛熔融的主要原因。西伯利亚地盾火山作用的开始（在不确定性范围内）与 2.49 +/- 4 百万年前的二叠纪-三叠纪边界大动物群灭绝事件同时发生；因此，这些数据使得两个事件之间是否存在遗传关系的问题仍然存在。
