INTEGRATED INTERPRETATION OF GRAVITY, MAGNETIC AND SEISMIC DATA FOR DETECTING IGNEOUS ROCKS IN THE EAST CHINA SEA

Using the latest gravity, magnetic and seismic data acquired by the marine geological survey project of Shanghai sheet on the scale of 1:1000,000, this paper analyzed the characteristics of gravity and magnetic fields in addition to the structural and lithological interpretation of seismic profiles. Helped by the geophysical features of the known igneous rocks, we inferred the distribution pattern of the igneous rocks in the East China Sea. Our results show that in the East China Sea, igneous rocks largely intrude in the Mesozoic along deep faults and extend in zones along the NNE direction. The small scale NWW trending igneous rocks erupted in later stage follow the later formed NW faults, and are distributed as stripes in E-W. And the early and middle Himalayan magmatic rocks occur in the central uplift of the East China Sea Shelf Basin.