Enhanced flux of extraterrestrial 3He across the Permian–Triassic boundary

被引：0

作者：

Tetsuji Onoue

Naoto Takahata

Mitsutaka Miura

Honami Sato

Akira Ishikawa

Katsuhito Soda

Yuji Sano

Yukio Isozaki

机构：

[1] Kumamoto University,Department of Earth and Environmental Sciences

[2] The University of Tokyo,Atmosphere and Ocean Research Institute

[3] Chiba Institute of Technology,Ocean Resources Research Center for Next Generation

[4] Tokyo Institute of Technology,Department of Earth and Planetary Sciences

[5] The University of Tokyo,Department of Earth Science and Astronomy

来源：

Progress in Earth and Planetary Science | / 6卷

关键词：

Permian; Triassic; Bedded chert; Mino Belt; Helium; Platinum group element; Interplanetary dust particle; Radiolaria;

D O I：

暂无

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学科分类号：

摘要：

The ca 252 Ma Permian–Triassic boundary (PTB) represents the most severe mass extinction event of the Phanerozoic, with the disappearance of ~ 80% of marine invertebrate species. Large-scale eruption of the Siberian Traps is the commonly favored cause, although the link between volcanism and extinction remains debated. Here, we report evidence for an extraterrestrial 3He influx in the PTB section of deep-sea bedded cherts from Japan. This unusual signal indicates a significant increase in the influx of interplanetary dust particles, likely related to an asteroid shower in the inner solar system. High-resolution stratigraphy indicates that the peak flux of dust particles occurred during the final 500 kyr of the Permian, concurrent with a pre-extinction decline in radiolarian diversity.

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