An Analytical Study of the Activity of Main Faults in the Southwest of Jianghan Basin

TLDR: By analyzing structure background and the development characteristics of the southwest of Jianghan basin and by choosing five section planes, which are vertical with these faults, for 3D seismic interpretation, it can be found that such main faults as Fuxingchang fault and Xiefengqiao fault control the regional structure and they are synsedimentary faults.

Abstract: Jangling depression,whose formation and development are very complicated,underwent multistage tectonization.By analyzing structure background and the development characteristics of the southwest of Jianghan basin and by choosing five section planes,which are vertical with these faults,for 3D seismic interpretation,it can be found that such main faults as Fuxingchang fault and Xiefengqiao fault control the regional structure and they are synsedimentary faults.The dimensional and temporal development characteristics of the main faults are studied both through growth index and fault activity ratio.It is indicated that the fault growth index cannot precisely reflect the actual fault activity.It has been proved that the fault activity ratio is fit for better analysis and study of the formation and development of the faults.