四川锦屏山地区推覆构造带特征及其研究意义

基金项目:

1∶5万《里庄、腊窝乡幅》区域地质调查。

详细信息

Nappe structures in the Jinpingshan area, Sichuan and their geological implications

Chengdu Institute of Geology and Mineral Resources, Chengdu 610082, Sichuan, China

摘要: 锦屏山地区推覆构造带滑移面均为韧性剪切带,而且整个推覆构造带由多个岩片推覆堆叠在一起,在其前缘则出现飞来峰群。通过对韧性剪切带和飞来峰群的精细研究,厘定其缩短距离约30km。同时厘定了扬子西缘的边界断裂——茶铺子-巴折区划性("槽-台"边界)复活断裂带(韧性剪切带),修正了锦屏山断裂为扬子西缘的边界断裂的认识。
- 锦屏山 /
- 推覆构造带 /
- 飞来峰群 /
- 韧性剪切带 /
- 边界断裂 /
- 四川
Abstract: The gliding plane within the nappe structures of the Jinpingshan area, Sichuan is interpreted as a (ductile) shear zone. The nappe structures in this area are generally overthrusted and stacked by a number of slices and sheets, with thrust outliers in the front of the nappe structures. It is inferred that the shortening distance is estimated to be about 30 km in terms of detailed study of the ductile shear zones and thrust outlies in the study area. The boundary fault zone on the western Yangtze has been redelineated as the Chapuzi-Bazhe(("geosyncline)-platform") regional renewed fault zone (ductile shear zone) rather than the Jinpingshan fault (defined) before.
- Jinpingshan /
- nappe structure /
- thrust outlier /
- ductile shear zone /
- boundary fault /
- Sichuan