INFLUENCE OF FAULT ASYMMETRIC DISLOCATION
ON THE GRAVITY CHANGES
Duan Hurong1，2 and Wang Tao21 College of Geomatics，Xi'an University of Science and Technology，Xi'an 710054，China
【摘 要】Abstract:A fault is a planar fracture or discontinuity in a volume of rock，across which there has been significant displacement along the fractures as a result of earth movement．Large faults within the Earth's crust result from the action of plate tectonic forces，with the largest forming the boundaries between the plates，energy release associated with rapid movement on active faults is the cause of most earthquakes．The relationship between unevenness dislocation and gravity changes was studied on the theoretical thought of differential fault．Simulated observation values were adopted to deduce the gravity changes with the model of asymmetric fault and the model of Okada，respectively．The characteristic of unevenness fault momentum distribution is from two end points to middle by 0 according to a certain continuous functional increase．However，the fault momentum distribution in the fault length range is a constant when the Okada model is adopted．Numerical simulation experiments for the activities of the strike-slip fault，dip-slip fault and extension fault were carried out，respectively，to find that both the gravity contours and the gravity variation values are consistent when either of the two models is
Influence of fault asymmetric dislocation on the gravity changes
