ENGINEERING EVALUATION OF ACTIVITY OF JIANSHI FAULT IN WESTERN HUBEI PROVINCE

A detailed study of the fractal geometry deformation structure, as well as the latest and present tectonic activity of Jianshi fault has been made to bring to light the kinematic and dynamic characteristics of the fault and its evolution.It was a thrust fault in the main episode of the Yanshanian epoch, an extension fault in the late Yanshanian and a sinistral strike slip fault in the Himalayan.In the Neogene, the northern segment of the fault underwent a stronger dextral strike slip than its central and southern segments.In Q₁-Q₂ it was once active, and age of the latest activity is determined to be about 197.6±160 thousand years and is presently weak in seismicity.It is therefore concluded that the Jianshi fault is an in active fault, in the engineering sense, causing no essential harm to the nearby hydropower works.