Abstract In order to investigate crustal shallow structures and fault shallow tectonic features crossing the Changyuan fault depression, we completed a 49 km multiple shallow seismic reflection profile and a 7 km shallow seismic reflection profile. According to the seismic reflection profiles and combined with the regional geological data, we analyze the crustal shallow structures and the fault shallow tectonic features in the study area. The results show that Changyuan fault depression is a deep east and shallow west dustpan-like subsidence, and the Cenozoic basement of the fault depression plunges from west to east; Huanghe fault is the west dipping spade shaped normal fault, and this fault disrupts 190 m Quaternary strata in the shallow part, disrupting multi-group Cenozoic lays and the crystalline basement.Therefore, it is a buried active fault in the Quaternary period; Changyuan fault disrupts the bottom of Neogene strata in shallow part, and it extends below the crystalline basement, therefore it is a Pre-Quaternary fault. The result provides seismological evidence for active tectonic research and seismic risk evaluation in Xinxiang and its neighboring districts.
