扬子地台西缘构造格局

基金项目:

地质矿产部区域地质调查项目

详细信息

TECTONIC FRAMEWORK ON THE WESTERN MARGIN OF THE YANGTZE PLATFORM

摘要: 研究区位于扬子地台与松潘—甘孜地槽结合部，属龙门山—锦屏山造山带中段。经历了基底形成、被动陆缘发展、褶皱造山、陆内造山４个构造演化阶段。尤其是中、新生代的褶皱造山和陆内造山作用，形成了现今地质景观。按构造岩片观点，以韧性剪切带为界划分构造岩片，从而建立了“四带五片”的构造格局。
Abstract: The study area is located in the junction zone between the Yangtze platform and the SongpanGanzê geosyncline, belonging to the central sector of the Longmen MountainJinping Mountain orogenic belt. This area has undergone four stages of tectonic evolution, i.e.: the formation of the basement, development of the pasive continental margins, folding and mountainmaking and intracontinental mountainmaking. Especially the last two stages gave rise to the present tectonic features. From the viewpoint of the tectonic slabs, the tectonic slabs have been distinguished with the ductile shear zones as the boundaries; thus a tectonic framework of “four zones and five slabs” has been established.
- Western margin of the Yangtze platform /
- tectonic framework /
- ductile shear zone /
- tectonic slab /
- tectonic evolution