| 湘西南震旦纪长安期沉积相变与构造环境分析 |
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| 引用本文： | 柏道远.湘西南震旦纪长安期沉积相变与构造环境分析[J].湖南地质,2001,20(1):5-8. |
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| 作者姓名： | 柏道远 |
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| 作者单位： | 湖南省地调院基础所!湖南湘潭41ll00 |
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| 摘 要： | 湘西南长安期沉积存在差别显著的3个相区，自西而东各相区厚度依次变大，其形成机制为同沉积正断裂，同沉积断裂及同期于青白口群岩门寨组和牛牯坪组中发育的顺层剪切褶皱主砂岩墙，区域裂陷海盆及拉张成历的坡基玄武岩的发育等表明，长安期扬子陆块东南缘为区域拉张环境。
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| 关 键 词： | 长安组 同沉积断裂 震旦纪 伸展构造 沉积相变 相变机制 |
ANALYZING THE FACIES CHANGE OF SEDIMENTARY FACIES AND THE STRUCTURAL ENVIRONMENT IN THE CHANG-AN STAGE OF SINIAN PERIOD IN SOUTH-WESTERN HUNAN |
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| BUO Dao-yuan.ANALYZING THE FACIES CHANGE OF SEDIMENTARY FACIES AND THE STRUCTURAL ENVIRONMENT IN THE CHANG-AN STAGE OF SINIAN PERIOD IN SOUTH-WESTERN HUNAN[J].Hunan Geology,2001,20(1):5-8. |
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| Authors: | BUO Dao-yuan |
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| Abstract: | There are obviously 3 different facies areas in the sediment of Chang-an stage. The thickness of rock beds enlarges gradually from the east to the west, and it is formed by Syn-sediment fractures. It shows that the environment of the east edgy of the Yangtze plate in Chang-an stage is tensional by developing the syn-sediment fractures, the sandstone dike hosted in the Yanmengzhai formation and Niuguping formation in Qingbaikou group, regional grabon basin and the basalt with vitreous groundmass formed by tension. |
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| Keywords: | South-western Hunan Chang-an formation Syn-sediment fracture |
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