| 对峡东莲沱组与湖南板溪群对比问题的一点浅见 |
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| 摘 要： | 通过对峡东至湖南境内板溪群、震旦纪地层的剖面结构及横相变化的研究,结合同位素测年和古地磁资料,肯定了湖南板溪群是扬子地台南缘裂陷海盆内具类复理石建造特征的陆源碎屑沉积,其沉积时限从930±20Ma 至790±10Ma,属青白口纪;峡区莲沱组是扬子地台上一套具磨拉石建造特征的陆源碎屑岩系,其沉积从760～780Ma 起始,属震旦纪。它与板溪群不是同期异相沉积而是新老关系,分别代表地史发展过程中某一特定时期的岩石组合。峡东莲沱组仅相当湘西北地区的渫水河组,湘中湘西地区的观音田组。
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| 关 键 词： | 莲沱组 板溪群 地层对比 峡区 湖南 |
On the correlation between the Liantuo Formation of the Yangtze Gorge and the Banxi Group of Hunan |
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| Abstract: | This paper,based On stratigraphic sequences,isotopic dating and palaeomag- netism,proves that the Liantuo Formation lies over the Banxi Group and they are the contemporaneous rocks of defferent facies,respectively representing the rock record of a specific stage in geological history. |
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| Keywords: | Liantuo Formation Banxi Group stratigraphic correlation Yangtze Gorge Hunan |
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