The Permian double extinction: stratigraphy at Chaotian, Sichuan, South China

Masafumi Saitoh

lundi 11 juin 2018, à 10 heures, amphithéâtre Guyton de Morveau

Abstract

The Permian mass extinction is characterized by its double-phased nature: the first extinction at the end-Guadalupian (Middle Permian) and the second at the end-Permian. The Guadalupian to lowermost Triassic shelf carbonates of characteristic deep-water facies are continuously exposed in the Chaotian section in northern Sichuan, South China. Litho-, bio-, and chemo-stratigraphy of the two extinction intervals at Chaotian are described. At Chaotian, anoxic deep-water masses emerged prior to the extinction at the end-Guadalupian and at the end-Permian. The intermittently expanded OMZ in the oceans may have contributed to the double extinction.

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The Permian double extinction: stratigraphy at Chaotian, Sichuan, South China

Masafumi Saitoh

lundi 11 juin 2018, à 10 heures, amphithéâtre Guyton de Morveau

 

Abstract

The Permian mass extinction is characterized by its double-phased nature: the first extinction at the end-Guadalupian (Middle Permian) and the second at the end-Permian. The Guadalupian to lowermost Triassic shelf carbonates of characteristic deep-water facies are continuously exposed in the Chaotian section in northern Sichuan, South China. Litho-, bio-, and chemo-stratigraphy of the two extinction intervals at Chaotian are described. At Chaotian, anoxic deep-water masses emerged prior to the extinction at the end-Guadalupian and at the end-Permian. The intermittently expanded OMZ in the oceans may have contributed to the double extinction.

titre:

The Permian double extinction: stratigraphy at Chaotian, Sichuan, South China

intervenant:

Masafumi Saitoh

date:

lundi 11 juin 2018