Статья

U-Pb constraints on pulsed eruption of the Deccan Traps across the end-Cretaceous mass extinction

Blair SchoeneDepartment of Geosciences, Princeton University, Princeton, NJ, USAMichael P. EddyDepartment of Geosciences, Princeton University, Princeton, NJ, USAKyle M. SampertonNuclear and Chemical Sciences Division, Lawrence Livermore National Laboratory, Livermore, CA, USAC. Brenhin KellerBerkeley Geochronology Center, Berkeley, CA, USAGerta KellerDepartment of Geosciences, Princeton University, Princeton, NJ, USAThierry AdatteISTE, Institut des Sciences de la Terre, Université de Lausanne, GEOPOLIS, Lausanne, SwitzerlandS. KhadriDepartment of Geology, Amravati University, Amravati, India

2019en

ABI

Аннотация

Temporal correlation between some continental flood basalt eruptions and mass extinctions has been proposed to indicate causality, with eruptive volatile release driving environmental degradation and extinction. We tested this model for the Deccan Traps flood basalt province, which, along with the Chicxulub bolide impact, is implicated in the Cretaceous-Paleogene (K-Pg) extinction approximately 66 million years ago. We estimated Deccan eruption rates with uranium-lead (U-Pb) zircon geochronology and resolved four high-volume eruptive periods. According to this model, maximum eruption rates occurred before and after the K-Pg extinction, with one such pulse initiating tens of thousands of years prior to both the bolide impact and extinction. These findings support extinction models that incorporate both catastrophic events as drivers of environmental deterioration associated with the K-Pg extinction and its aftermath.

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Идентификаторы

DOI: 10.1126/science.aau2422

Цитирования и источники

Цитирований: 2Использованных источников: 0

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