Late Cenozoic Tectonic Stress Field of Xigeda Fault
Abstract In this article, we measure the tensional fracture, shear joints, and the faults developed in the Xigeda formation during the late Cenozoic. Then, we project the measurements into Wulff net with lower hemisphere, and make a rose diagram of joint and tensional fracture. The results show that horizontal principal stress is in the NNE-SSW direction during the early period and horizontal principal stress is in the NWW-SEE direction during the late period. The late stage faults are mainly strike and normal, gradually determining the structural features and landform.
Key words :
Xigeda fault zone
joint
structural geomorphology
tectonic stress field
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