摘要
美姑地区位于扬子陆块西南缘四川断块西南部,西邻康滇地轴断块,南东接上扬子断块。因此该区域内地质构造复杂。深入研究该地区的叠加构造特征、演化过程,为美姑河流域梯级水电开发提供可靠的地质资料非常有意义。研究表明,该区域主要发育了SN、NE、NW三个方向的叠加构造体系,这三个方向的构造分别形成于喜马拉雅造山期的三个阶段,明确了各个构造体系之间的演化序列。
Meigu region is located in the southwest of Sichuan fault block in the southeast of Yangzi landmass, which is also located between west part of Kangdian axis fault block and southeast part of Shangyangzi fault block. Therefore, the structure characteristics are complex. We study the superposition structure characteristics in this local region throughly and analyze the evolutionary process to provide the geological information for the hydroelectric developing of Meigu valley. Our study indicates that this region has mainly grown superposition structure system towards three directions, SN, NE, and NW. These three directions structure separately had formed in three stages of Himalayas Mountain building eras and had been clear about the evolved sequence among each structural system.
出处
《四川地震》
2008年第1期43-47,共5页
Earthquake Research in Sichuan
关键词
叠加构造
叠加褶皱
断裂构造
美姑地区
superposition structure
superposition drape
rapture structure
Meigu Region
