THE CHARACTERS OF GEOLOGY AND GEOPHYSICS OF SHELL BASINS OF EAST CHINA SEA AND ADJACENT SEA AREA
JIANG Wei wei SONG Hai bin HAO Tian yao LIU Shao hua (Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100101, China)
This paper analyzed the characters of gravity and magnetic fields of shell basins of East China sea and adjacent area. Wavelet transform and multiresolution analysis of gravity and magnetic data of the study area were calculated. According to results of calculation, the characters of gravity and magnetic fields of the study area are not distinctness compared with main land basins. But the main part of basin is also situated in relatively relaxed changed area of anomalies. In interior of basin there are a few local upheaval area of anomalies. But the main characters are relaxed. In border area of basin is mostly relatively upheaval area of anomalies. But there are local relaxed areas in border area. The characters of gravity and magnetic fields show that floor of basin relative border area are high density and magnetism rocks. In middle part of basin, magnetic anomaly is positive and high. Buger gravitational anomaly is high compared with border area. Main tend towards of gravity field is NNE. Local gravitational anomaly changed smoothly. Tend towards of magnetic anomaly is not distinctness compared with gravity anomaly. But it is also NNE. The characters of gravity and magnetic fields show that geological construct of East China sea and adjacent area is extension of continent structure frame.