Abstract:To understand the stress nature and activity characteristics of secondary faults in Shuikou reservoir area,with the focal mechanism data of 15 earthquakes which have clear and reliable Pwave first motions, we deduced the direction of principal axes of tectonic stress field in this area by using the algorithm of mechanical axis tensor, and then made stress analysis of the faults. The results show that the stress nature of only Wankou fault is compressive and the others are tensional. On the basis of crossfault shortleveling data of 6 sites in the reservoir area, we found out, by using the linear fitting method, that the Xiguazhou fault moves normally and the other move reversely. Finally, the results with the two methods were compared and discussed.
Zhong Jimao. STRESS ANALYSIS AND RESEARCH ON ACTIVITY CHARACTERISTICOF SECONDARY FAULTS IN SHUIKOU RESERVOIR AREA,FUJIAN[J]. jgg, 2010, 30(Supp.1): 12-16.