Tectonic Characteristics and Geological Significance of Joints on the Southwest Bank of Yangzonghai Lake

Abstract

Affected by the movement of the Xiaojiang Fault Zone, frequent tectonic activities have occurred in the Yangzonghai Lake area, and a large number of joints have developed in the rock formations. The analysis of joints in the study area shows that there are 6 sets dominant joints, of which 4 sets are two conjugate joint systems; the analysis of stereographic projection for conjugate joints shows that the direction of the maximum principal stress indicated by the tectonic stress field in the area has a tendency to turn from NWW to NNW, which is consistent with the tectonic stress field reflected by faults and folds in the study area and and conforms to the characteristics of the tectonic stress field in the middle of the Xiaojiang Fault Zone.