The eruptive tempo of Deccan volcanism in relation to the Cretaceous-Paleogene boundary
The eruptive tempo of Deccan volcanism in relation to the Cretaceous-Paleogene boundary
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DOI：
10.1126/science.aav1446
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发表时间：
2019-02-22
期刊：
影响因子：
56.9
通讯作者：
Mittal, Tushar
中科院分区：
文献类型：
--
作者：
Sprain, Courtney J.;Renne, Paul R.;Mittal, Tushar
晚白垩世的环境变化记录表明，德干圈闭（DT）火山活动导致了白垩纪-古近纪界线（KPB）生态系统危机。然而，检验这一假设需要在DT中识别KPB。我们用高精度的氩-40/氩-39数据来限制KPB的位置，使其与岩浆管道系统的变化相一致。我们还发现，DT并没有爆发在三个离散的大脉冲和DT体积的90%以上爆发在
Late Cretaceous records of environmental change suggest that Deccan Traps (DT) volcanism contributed to the Cretaceous-Paleogene boundary (KPB) ecosystem crisis. However, testing this hypothesis requires identification of the KPB in the DT. We constrain the location of the KPB with high-precision argon-40/argon-39 data to be coincident with changes in the magmatic plumbing system. We also found that the DT did not erupt in three discrete large pulses and that >90% of DT volume erupted in