湖南省地层结构与盆地格架

本文以湖南省岩石地层展布特点为前提,以北西-南东向横切地层剖面为基础。探讨了我省地层结构与盆地格架。笔者通过地层结构分析。对地层分区界线、物源区、主导构造作用特点等进行了讨论,从而建立了沉积盆地格架。指出我省盆地是在陆壳基底上,受扬子陆块与华夏陆块的双重控制。沉积范围不断缩小的沉积盆地。这种认识的确立,对各盆地期沉积层的变形、岩浆岩的分带与侵位方式、隐伏矿床的探索等都将产生新的联系。

Stratigraphic Structure and Basin Framework

Taking the property of litho-strata distribution as a prerequisit and on the basis of transversal section, which cuts through the strata and strike. NW-SE direction. the paper discusses the stratigraphic structure and the basin framework in Hunan province. Through the analysis of the stratigraphic structure au-rhour discusses also the stratigraphic boundaries. the source region of sedimems and the role played by major structures so that the basin framework is constructed. This paper poits out that. on the basement of continental crust. the basins in Hunan were those whose sedimental areas had been progressively shrinking and were con-trolled by both Yangtze and Huaxia masses. Extablishment of this theory would result in an zppearence of a new relation about the deformation of strata with different ages, zoning of igneous rocks and the way of their em-placement. and the serching of hidden deopsits.