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Geophysical research on deep structure feature in study region of red river fault zone

HAO Tian-yao~1,JIANG Wei-wei~1,XU Yi~1,QIU Xue-li~2,LIU Jian-hua~1 DAI Ming-gang~1,XU Ya~1,HUANG Zhong-xian~1,SONG Hai-bin~1  
As a window to know the plate mutual movement,deep process and geological evolution,Red River Fault Zone has being devoted much attention.Where the fault extends after going into sea area is a hotspot question to discuss and study.On the basis of gravity and magnetic research and refers to the seismic tomography result in Ailao Shan/ Red River area,the extending of this fault zone in sea area was discussed in this paper.The density structure at two profiles was rebuilt according to gravity data.The inversion result shows that the shallow and deep structure are not in line.There is a low-density layer at middle crust in Yinggehai region.Perhaps the strike-slip of Red River Fault Zone in Yinggehai region was taken place along the layer.
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