Abstract：Marine geological survey is significant important for the exploration of marine minerals, along with the increasing of human demands for marine mineral resources. The marine geological and geophysics survey in our country started late and is in a lower level now. However, as a quick and effective geophysics measurement, the airborne gravity survey plays an important role in the marine geological survey. The advanced GT-1A airborne gravity measurement system was introduced in 2006 and the airborne gravity survey at 1:200 000 scale was carried out in sea-land transition region around Tianjin for the first time in 2011.This survey collected 30 thousands kilometers measure data with high quality, implemented the sea-land continuous measurement in the sea- land transition area and filled the blank in the high-precision airborne gravity measure in this area. This paper has given a detailed description of the achievements in airborne gravity survey, and studied the Shijiutuo Salient in the study area from the view of airborne gravity. The basement of Shijiutuo Salient was concluded to be possessed segmentation and the new basement salient was outlined to give a conclusion for further oil and gas exploration. The high magnetic anomaly in Bozhong Depression was also discussed. In addition, some important recognitions were achieved by studying gravity character of the main structural units, basement and fractures in the sea-land transition region, which are important for basic geology and environment research.
2016, Vol. 3 
