Volcanism at the Permian‐Triassic Boundary in South China and Its Effects on Mass Extinction
Volcanism at the Permian‐Triassic Boundary in South China and Its Effects on Mass Extinction
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DOI：
10.1111/j.1755-6724.1989.mp2004007.x
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发表时间：
2009-05
影响因子：
3.3
通讯作者：
Yin Hongfu;Huang Siji;Zhang Kexin;Yang Feng-qing;Ding Meihua;Bi Xianmei;Zhang Suxin
中科院分区：
文献类型：
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作者：
Yin Hongfu;Huang Siji;Zhang Kexin;Yang Feng-qing;Ding Meihua;Bi Xianmei;Zhang Suxin
本文讨论了广泛分布于二叠-三叠系界线的粘土岩，它们多为火山成因。在二叠纪-三叠纪界线的粘土岩中，许多地方发现了火山成因的结构、构造和高温石英等矿物。从边界粘土岩中采集到的微球粒数以千计，其中许多具有典型的熔融-冷却-凝固过程特征，表明它们是由火山喷发或外星撞击形成的。火山作用对二叠纪-三叠纪生物大绝灭的影响可能反映在牙形刺、藻类和菊石中.在沿着特提斯海岸的二叠系-三叠系剖面中发现了界线粘土岩.它们的起源还有待研究。
This paper discusses the clayrocks widespread at the Permian-Triassic boundary, which are mostly of volcanic origin. Volcanogenetic textures, structures and minerals such as high-temperature quartz are found in clayrocks at the Permian-Triassic boundary in many places. Thousands of microspherules have been collected from the Boundary clayrocks, many of which exhibit the typical features of the process from melting to cooling and solidification, indicating that they were formed by volcanic eruption or extraterrestrial impact. Volcanic effects on the Permian- Triassic mass extinction may be reflected in conodonts, algae and ammonoids. The Boundary clayrocks are found in many Permian- Triassic sections along the coast of Tethys. Their orighin remains to be studied.