| 滇东黔西地区陆相二叠—三叠系界线粘土岩特征 |
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| 引用本文： | 王尚彦,殷鸿福.滇东黔西地区陆相二叠—三叠系界线粘土岩特征[J].中国地质,2002,29(2):155-160. |
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| 作者姓名： | 王尚彦 殷鸿福 |
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| 作者单位： | 1. 中国科学院地球化学研究所环境地球化学国家重点实验室,贵州贵阳,550003贵州省地质调查院,贵州贵阳550004
2. 中国地质大学,湖北武汉,430074 |
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| 基金项目： | 国家自然科学基金重点项目(49632070)和贵州省地矿厅专项经费资助. |
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| 摘 要： | 在滇东黔西地区，海相和陆相二叠－三叠系界线附近均有界线粘土岩存在。本文介绍了该区陆相界线粘土岩的特征，并探讨了其成因。这些粘土岩主要矿物成分为伊／蒙混层矿物（20％－80％）和高岭石（35％－80％），碎屑物中有锆石、磷灰石、六方双锥石英、其他类型石英和微球粒等。提出界线粘土岩中的物质主要是火山成因，也有正常沉积物的加入，可能还拌有撞击作用的影响。
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| 关 键 词： | 二叠－三叠系界线 粘土岩 云南 贵州 火山成因 沉积物 撞击作用 |
| 文章编号： | 1000-3657(2002)02-0155-06 |
Characteristics of claystone at the continental Permian-Triassic boundary in the eastern Yunnan-western Guizhou region |
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| WANG Shang-yan,YIN Hong-fu.Characteristics of claystone at the continental Permian-Triassic boundary in the eastern Yunnan-western Guizhou region[J].Chinese Geology,2002,29(2):155-160. |
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| Authors: | WANG Shang-yan YIN Hong-fu |
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| Institution: | WANG Shang-yan 1,2,YIN Hong-fu 3 |
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| Abstract: | There exists boundary claystone near the boundary between both the marine and terrestrial Per-mian and Triassic in the eastern Yunnan-western Guizhou area.This paper in troduces the characteristics of the boundary terrestrial claystone in the area and discusses its origin.The principal minerals of the clay-stone are illite-montmorillonite mixed-layer minerals(20%-80%)and kaolinite(35%-80%),and the frag-ments include zircon,apatite,hexagonal dipyramidal high-temperature quartz and other types of quartz and micro spherules.It is suggested that the terrestrial boundary claystone in the area mainly formed by volcan-ism,accompanied by normal deposition and influence of impact. |
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| Keywords: | Permian-Triassic boundary claystone eastern Yunnan-western Guizhou |
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