2006•Earth and EnvironmentRequires access

ADVANCES IN GEOCHEMICAL STUDIES OF PERMIAN/TRIASSIC MASS EXTINCTION

Mei Ya-qing

Abstract

The Permian/Triassic mass extinction plays a great role in the evolutionary history of the Earth.After that,the revolution of species was accelerated greatly.The paper summarizes simply the research results of geochemists,geologists and paleontologists in recent years,including dating of the event and several hypotheses.Especially,we described in detail the exterrestrial impact(asteroid or comet),volcanic eruption,anoxia and marine acidification,and then made a simple analysis and discussion in the significance of mass extinction.

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Key concepts: Extinction event, Permian–Triassic extinction event, Permian, Geology, Early Triassic, Paleontology, Volcano, Extinction (optical mineralogy)