现代地质2018，Vol.32Issue(2)：279-288,10.DOI:10.19657/j.geoscience.1000-8527.2018.02.07
酒店垭-桑木场构造须家河组节理发育特征与应力场解析
Characteristics and Tectonic Stress Field of Joints in Xujiahe Formation of Jiudianya-sangmuchang Structure
摘要
Abstract
The study of paleotectonic stress field and division of tectonic stages in the Southeastern Sichuan,is one of the key research object for the analysis of the evolution of the Sichuan basin in recent years.It is of great significance to clarifying the relationship between tectonic evolution and paleo-stress field,and to further stud-ying the stress evolution of the margin of Sichuan basin and guiding oil and gas exploration in the later period.Based on the analysis of the 452 group joints observed in the Xujiahe Formation of the Jiudianya-sangmuchang structure,using the structural geometrical analysis method and the apatite fission track and the acoustic emission experiment combined with the relevant regional tectonic evolution history,the phases and the tectonic stress field in the study area were analyzed.The results show that there are two sets of structure joints in this area,which are the joints formed by the two main tectonic stresses of nearly NW-SE direction and near NE-SW direction.This region has at least two or more tectonic movements which have a great influence on the area since the Triassic:the first phase is the middle and late period of the Yanshan Movement.The direction of the maximum principal axes of stresses is 133°,mainly forming tectonic system with a large scale in NE and NNE directions.The fracture is relatively developed.The second stage is the late stage of the Yanshan Movement-early Himalayan Movement.The direction of the principal axes of stresses is 51 °,mainly forming structural system in NW direction with a small scale,but the fracture is still relatively developed.关键词
酒店垭-桑木场构造/须家河组/节理/发育特征/构造应力场/构造解析Key words
Jiudianya-sangmuchang structure/Xujiahe Formation/joint/development characteristics/structural stress field/fracture structural analysis分类
能源科技引用本文复制引用
钟城,秦启荣,魏志红,李虎,邓毅,何威..酒店垭-桑木场构造须家河组节理发育特征与应力场解析[J].现代地质,2018,32(2):279-288,10.基金项目
国家科技重大专项“四川盆地重点地区应力与裂缝发育规律及评价方法研究”(2017ZX05036003-003) （2017ZX05036003-003）
四川省应用基础研究项目“冲断带前缘地腹高陡逆断裂形成机理及裂缝发育量预测”(2017JX0176). （2017JX0176）
