Magnetostratigraphy across the end-Permian mass extinction event from the Meishan sections, southeastern China

The end-Permian mass extinction (EPME) has been recorded as the most severe biodiversity crisis in Earth's history, although the timing of the marine and terrestrial extinctions remains debatable. We present a new high-resolution magnetostratigraphic succession across the EPME and the Permian-T...

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Bibliographic Details
Published in:Geology (Boulder) 2021-11, Vol.49 (11), p.1289-1294
Main Authors: Zhang Min, Zhang Min, Qin Huafeng, Qin Huafeng, He Kuang, He Kuang, Hou Yifei, Hou Yifei, Zheng Quanfeng, Zheng Quanfeng, Deng Chenglong, Deng Chenglong, He Yan, He Yan, Shen Shuzhong, Shen Shuzhong, Zhu Rixiang, Zhu Rixiang, Pan Yongxin, Pan Yongxin
Format: Article
Language:English
Subjects:
Asia
Biodiversity
biota
Changhsingian
Changxing China
Changxing Formation
China
Extinction
Far East
Fossils
Geology
Geomagnetism
global
Induan
Lopingian
Lower Triassic
Magnetostratigraphy
Mass extinctions
Meishan China
Mesozoic
paleomagnetism
Paleozoic
Permian
Permian-Triassic boundary
Polarity
southeastern China
Species extinction
stratigraphic boundary
Stratigraphy
stratotypes
Terrestrial environments
time scales
Triassic
Upper Permian
Wuchiapingian
Yinkeng Formation
Zhejiang China
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Summary:The end-Permian mass extinction (EPME) has been recorded as the most severe biodiversity crisis in Earth's history, although the timing of the marine and terrestrial extinctions remains debatable. We present a new high-resolution magnetostratigraphic succession across the EPME and the Permian-Triassic boundary (PTB) from the Meishan sections in southeastern China, which contain the global boundary stratotype section and point (GSSP) for the base of the Triassic (also the Induan Stage) and the base of the Changhsingian Stage. We identified five normal and five reverse magnetozones, including MS1n to MS5n and MS1r to MS5r, from oldest to youngest, in the Changhsingian and Induan Stages. The Induan Stage was determined to consist of two polarity intervals, where the upper one is reverse (MS5r), and the lower one is normal (MS5n). The Changhsingian Stage is dominated by normal polarity, intercalated with four short-term reverse magnetozones (MS1r to MS4r). Consequently, the PTB and the Wuchiapingian-Changhsingian boundary are clearly located in MS5n and MS1n, respectively. These new magnetostratigraphic results provide a potential reference geomagnetic polarity pattern with which to refine the geomagnetic polarity time scale for the EPME and the Permian-Triassic transition.
ISSN:0091-7613
1943-2682
DOI:10.1130/G49072.1