Structural features of the front part of the fanless Xilaiqiao fault

The shallow structural characteristics of Wufengshan-Xilaiqiao fault are studied by shallow seismic and drilled joint profile method. The results show that: (1) the Wufengshan-Xilaiqiao fault is a concealed normal fault with an overall strike of NW, a dip of NE, an apparent dip of 60°, a buried depth of about 96 m at the upper breakpoint, and a maximum apparent fault distance of about 10 m in the survey line control area. m; (2) The Wufengshan-Xilaiqiao fault has a variable trend in the shallow area, extending from the west of Yaoqiao Town to Weijiagou Village along the NWW, and then extending NW to the intersection of Beigang Road and Puzhao Road (3) According to the comprehensive exploration and drilling results, it is preliminarily considered that the latest active age of the Wufengshan-Xilaqiao fault is the early Early Pleistocene to the early Middle Pleistocene.