In light with Bouguer gravity data, various information on faults were obtained by means of analytical continuation, target field extraction, arbitrary horizontal direction derivative processing and discrete wavelet transform processing. According to synthetic analyses with geologic data, the 123°E longitude was chosen as a typical profile, then initial models were established based on seismic data to perform gravitational inverse iterative fitting, and finally density parameters of various modules and their distribution were given. Based upon which the geologic and geophysical properties of the principal faults of the study area were analyzed, resulting in fault zone and block binding distribution maps. The paper focuses on the discussion of west marginal fault zone of the Korean Peninsula and Wulian– Qingdao–Rongcheng fault zone in the study area and points out that Wulian–Qingdao– Rongcheng fault zone did not intrude Korean Peninsula to connect with Imjinhang fault zone. It also holds that northward translational movement of the portion belonging to the Yangtze Plate at the west side of west marginal fault zone of the Korean Peninsula once occurred under the action of northward stress. Only the fault zones consisting of Wulian– Qingdao–Rongcheng fault zone along with northern fault zone of South Yellow Sea, west marginal fault zone of the Korean Peninsula, and south marginal fault zone of Cheju Island should be the binding site of Sino‐Korean and Yangtze Plates.
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