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中国南方二叠纪 11个层序中的S1、S6、S7和S11四个Ⅰ型层序底界面具有特征沉积记录 ,反映在岩相、地球化学和生物演化方面 ,尤其是作为与海平面下降特征相对应的古风化壳、古喀斯特标志风化残积硅铝 /铁铝粘土层、铝质粘土层、残积角砾灰岩或淡水胶结等现象广为发育。二叠纪各相关Ⅰ型层序底界面的分布及其之上的火山沉积、沉积背景转变等具有重要的事件意义。研究结果表明 :S1底界面对应的是构造事件 ,即范围较广的黔桂运动 ;S7底界面反映的构造事件为东吴运动 ;S6和S11的底界面均代表海平面下降事件。中国南方二叠纪的层序地层划分及其性质不能用一种方案和一种模式套用。
The four types of sequence interfaces, S1, S6, S7 and S11, at the bottom of the Permian eleven sequences in South China have characteristic sedimentary records reflecting lithofacies, geochemistry and biological evolution, especially as a function of declination from sea level Characteristics of the ancient weathering crust, ancient karst mark weathered residual Si-Al / Fe-Al clay layer, aluminum clay layer, residual boulder limestone or freshwater cementing and other phenomena are widely developed. The distribution of the type I sequence boundary interfaces at the bottom of the Permian and the volcanic sediments and the change of sedimentary background above it have important event significance. The results show that the S1 bottom interface corresponds to the tectonic event, that is, the wide-ranging Guizhou-Guangxi movement. The tectonic event reflected by the S7 bottom interface is the soochow movement. The bottom interfaces of S6 and S11 represent the sea level descent events. The sequence stratigraphy and its nature of the Permian in southern China can not be covered by a scheme and a model.