Discovery of Microspherules in Claystone near the Terrestrial Permian——Triassic Boundary
Discovery of Microspherules in Claystone near the Terrestrial Permian——Triassic Boundary
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发表时间：
2001
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通讯作者：
Yin Hongfu
中科院分区：
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作者：
Yin Hongfu
对云东—黔西地区多处陆相二叠纪—三叠纪界线剖面的研究表明，在二叠纪—三叠纪界线附近，普遍发育1~2层异常事件成因粘土岩。许多微球粒是在粘土中首次发现的。根据其化学成分，微球可分为硅质微球和重质微球两类。作者认为这种带有微球的粘土岩一定是正常沉积物与火山碎屑共同沉积形成的。火山活动是由陨石和地球的碰撞引起的。微球是碰撞形成的产物之一。
Study of several terrestral Permian-Triassic bounday sections in the eastern Yunnan-western Guizhou area shows that ther commonly occur 1~2 horizons of claystones of non-normal event origin near the Permian-Triassic boundary. Many microspherules have been first found in the claystones. According to their chemical compositions, the microspherules can be divided into two types: siliceous and baritic. Writers considered that this claystone with the microspherules must be formed by co-sedimentation of normal sediments and the volcanic clast. The volcaism was coused by collision of meterorite and the earth. The microspherules is one of the products formed in collision.