Denudation Recovery of Himalayan Periods in Middle Section of Western Sichuan Depression
详细信息
- 责任者：Shen Zhongmin (State Key Lab. of Oil-Gas Reservoirs Geology and Exploitation ; Chengdu University of Technology ; Chengdu 610059 ; China) ; Liu Yang
- 刊名：Computing Techniques for Geophysical and Geochemical Exploration
- 出版年：2011
- 卷期：33(2)
- 关键词：剥蚀厚度 ; denuded thickness ; 四川 ; Sichuan Province
- 页码：p.189-194
- 图表：4 illus., 3 tables, 14 refs.
- 分类号：0803
- issnNo：ISSN1001-1749
- isbnNo：CN51-1242/P
摘要
Tectonic movements have occurred frequently in the middle section of western Sichuan Depression since the Late Triassic, including the Indosinian movement, the Anxian movement, the Yanshan movement and the Himalaya movement. They are mainly caused by compressive stresses leading to many unconformity surfaces. Vitrinite reflectance distribution characteristics and the sonic velocity analysis method are used to recover the denuded amount caused by three movements respectively. The results of the denuded amounts show that the thickness of erosion has decreased from north to south. The thickness has increased from west to east, in Yazihe region, the erosion is strong, smaller thickness of erosion decreased from east to the Majin regione. Then Zhongjiang erosion has become a large thickness.