Abstract This paper uses various methods such as seismicity, surface seismic geological survey, shallow seismic exploration, high-density electrical method exploration and trench excavation to investigate the Zhazi’ao fault. Through investigation, the Zhazi’ao fault is developed in the Paleozoic Permian sandstone and Mesozoic Triassic limestone and sandstone formations. It is a reverse fault. The fault is generally NNE-oriented and the length is about 15 km. The width of the fracture zone is generally less than 20 m, and the fault scale is small. Combined with shallow geophysical exploration and trenching profiles, it is preliminarily presumed that the Zhazi’ao fault does present late Pliocene fault activity, and is the seismogenic structure of the Junlian M4.9 earthquake on January 28, 2017.
HE Qiang,WANG Shiyuan,ZHOU Yadong et al. Detecting Fault and Activity Studies of Zhazi’ao Fault in Junlian-Changning Earthquake Zone in the Southern Margin of Sichuan Basin[J]. jgg, 2021, 41(2): 206-211.
HE Qiang,WANG Shiyuan,ZHOU Yadong et al. Detecting Fault and Activity Studies of Zhazi’ao Fault in Junlian-Changning Earthquake Zone in the Southern Margin of Sichuan Basin[J]. jgg, 2021, 41(2): 206-211.
