华南地震2009，Vol.29Issue(2)：72-79,8.
龙门山北段构造变形及演化历史
Tectonic Deformation and Evolution History of the Northern Segment of Longmen Mountains
宋春彦 1刘顺 1何利 1郝晓琳1
作者信息
- 1. 成都理工大学地球科学学院,四川,成都,610059
- 折叠
摘要
Abstract
The Ms8.0 huge earthquake of May 12th, 2008 occurred at Wenchuan shows that Longmen Mountains situate in an active tectonic zone. In order to achieve the aim of defending earthquakes and reducing disasters, further research on Longmen Mountains is very important. Through analyses of tectonic kinematics and dynamics observed in the northern segment section of Longmen Mountains, 4 tectonic deformation bands are divided between Maoba and Zhuyuanba. After summing up the deformation characteristics of the 4 tectonic bands, their evolution histories are discussed on the basis of previous literature. Based on the results, Zhuyuanba Fault is first discussed, and it is one of the main faults in Longmen Mountains and a direct result of Himalayan movement. Finally, combined with previous studies, the evolution of Longmen Mountains is discussed. The main deformations studied in this paper occurred between Indo-Chinese movement and Himalayan movement. It experienced the drape orogenic movement in indosinian movement, and the rudiment was formed. The Middle Faults moved again during Yanshan movement. Then some concealed faults were formed. Himalayan movement is a representative of the thrust nappe orogenic movement in Longmen Mountains. The strong extrusion happened and the Middle Faults moved again at that time. Many faults which cut off the anticlines and synclines and small closed folds came into being then.关键词
龙门山/变形历史/中央断裂/印支运动Key words
Longmen Mountains/Deformation history/Middle Faults/Indo-Chinese movement分类
天文与地球科学引用本文复制引用
宋春彦,刘顺,何利,郝晓琳..龙门山北段构造变形及演化历史[J].华南地震,2009,29(2):72-79,8.
