Characteristics of marine strata distribution in South Yellow Sea based on airborne gravity and magnetic data

Based on the high accuracy airborne gravity and magnetic data of South Yellow Sea, combined with the characteristics of gravitational and magnetic field and geophysical properties, the authors analyzed the matched filtering through radially averaged logarithmic power spectrum to separate and extract the gravity and magnetic anomaly caused by the interfacial fluctuation of marine strata. And the depth of the marine strata interface of South Yellow Sea was interpreted by the tangent and Vaquier methods. The authors also compiled the depth of the bottom and top interface of the marine strata after geological and geophysical interpretations. In addition, a preliminary division of South Yellow Sea marine strata tectonic units was carried out and the strata distribution was also discussed. The central depression and southern depression of Subei- South Yellow Sea depression area were developed on the strongly magnetic basement, with weak tectonic deformation. The marine strata remain intact with a shallow depth of 4 km to 8 km. South Yellow Sea is the oil and gas exploration area with great resource potential.