川西南多重褶皱构造及背景分析  

Multi-phased fold structures and tectonic background analysis in southwest Sichuan Province

作　　者：郭安林[1] 程顺有[1] 张朝锋[1] 李广[1] 谷华[1] 葛菲[1] 张琳[1] 

机构地区：[1]西北大学大陆动力学国家重点实验室,陕西西安710069

出　　处：《西北大学学报（自然科学版）》2009年第3期484-489,共6页Journal of Northwest University（Natural Science Edition）

基　　金：中石化基金资助项目(YPH08006)

摘　　要：目的探讨川西南多重构造(东西、北东和北西褶皱构造)特别是褶皱构造的相互关系、形成时序和不同尺度的构造背景。方法野外观察和室内分析相结合,局部构造和区域构造相结合。最后放在全球尺度构造体系的背景上加以分析,说明其形成原因。结果研究区内的东西构造形成在先,北东构造次之,北西褶皱构造属于最晚的一幕构造,它们之间表现为构造叠加关系。这些构造形成在中生代晚期和新生代较短的时间内,多半属于喜山期构造产物。结论较为理想地分析了川西南多重构造的相互关系、形成先后和成因背景。Aim To study the relationships, formation time and tectonic background on different scales of the multi-phased structures in particular those fold structures in southwest Sichuan Province. Methods Combination of field observation and indoor analysis, local structure and regional structure study. And final analysis on the globalscale tectonic systems is given. Results The E-W folds are the earliest structures, and then the NE folds. The NW folds are the latest structure formed. These folds are superposed on another and occurred in a short period after the lateretaceous. During the post-Jurassic, on the background of three global-scale dynamic tectonic systems （ Circum-Siberia arcformed tectonic system, Pacific tectonic system and Tethys Alpine-Himalayan tectonic system） and the previous regional structures and secondary dynamic origin, the multi-phased fold structures in the area were formed and became a window for intracontinental deformation. Conclusion The mutual relationships, formation order and background of the multi-phased fold structures in southwest Sichuan province were analyzed.

关 键 词：川西南 多重褶皱构造 构造关系 三大构造动力学体系 陆内构造 

分 类 号：P597.3[天文地球—地球化学]