In order to determine the gravity anomaly of the sediment tank, at each observation point we made the most of all the vertical prismatic sized according to the x axis and y axis right by the distance between two points (2 x 2 km), the depth by the depth of the model at that point according to the formula (2.14). Gravity anomaly in the domain space is determined by the modified inverse Fourier sea results analysis. To improve the accuracy of identifying unusual sliding technique, gravity model with sliding step shiff = 0.26 was we applied (Chai, y. and Hinze, 1988 [837]).
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