Subordinate fault is the direct production of crust deformation

It has rich information of structure deformation . The forming and evolution of subordinate fault can lead to break up of the rocks and speed up the weathering of the rocks. Transformed subordinate faults have many types and are of complex patterns

they are important subject of structure study

and also they are the important study base of ground surface stability. In this paper

we use the airborne L-SAR image of Hong Kong

and select the weak-information of subordinate faults by processing the image

set up the model of transform deformation

in order to analyze the structure background of unstability ground surface of study area. The NE faults are the main faults in study area

their dextral movement formed a series of subordinate shear plane R

P

R’ and related transformed faults. They are represented as weak information of lineation in radar image and related to the development of micro-geography. By selecting and enhancing the weak information

we made the deformation frame of subordinate faults. Together with field investigation

we found that there are EW and NEE trans-tension faults in Ma-An-Shan area

and the EW faults are the transformed faults of NEE faults. Most of these faults are related to the landslide

and are the main geological factors of Ma-An-Shan landslide.