| 滇黔地区陆相二叠系—三叠系界线附近粘土岩中发现微球粒 |
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| 引用本文： | 王尚彦,殷鸿福.滇黔地区陆相二叠系—三叠系界线附近粘土岩中发现微球粒[J].地质论评,2001,47(4):411-414. |
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| 作者姓名： | 王尚彦 殷鸿福 |
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| 作者单位： | 1. 贵州省地质调查院,贵阳,550004
2. 中国地质大学,武汉,430074 |
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| 基金项目： | 国家自然科学基金重点项目(编号 49632070)，贵州省地质矿产局专项经费资助 |
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| 摘 要： | 在滇东黔西地区的几条陆相二叠系-三叠系界线地层剖面研究中，二叠系-三叠系界线附近普遍存在1-2层非正常事件成因的粘土岩，并在粘土岩中发现了大量微球粒，依据化学成分，这些微球粒可分为硅质和钡质两类，笔者认为这种含微球粒的粘土岩成因很可能是，陨石撞地球诱发大规模火山爆发，其产物又经历正常喾作用并有非火山和撞击的正常沉积物混入，这些奇异的球粒，可能就是撞击的产物之一。
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| 关 键 词： | 陆相二叠系－三叠系界线 粘土岩 微球粒 化学成分 成因 火山 陨石 沉积作用 硅质球 钡质球 |
Discovery of Microspherules in Claystone near the Terrestrial Permian-Triassic Boundary |
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| WANG Shangyan,YIN Hongfu Guizhou Institute of Geological and Mineral Survey,Guiyang,China University of Geosciences,Wuhan-.Discovery of Microspherules in Claystone near the Terrestrial Permian-Triassic Boundary[J].Geological Review,2001,47(4):411-414. |
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| Authors: | WANG Shangyan YIN Hongfu Guizhou Institute of Geological and Mineral Survey Guiyang China University of Geosciences Wuhan- |
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| Abstract: | 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. |
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| Keywords: | terrestrial Permian-Triassic boundary claystone microspherule |
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