Gravity data interpretation by a two-sided fault-like geologic structure using the global particle swarm technique.

We have developed a scheme for the interpretation of gravity data by a two-sided fault-like geological structure. The scheme is based on the particle swarm optimization and determines the model parameters of the upthrown and downthrown of the fault. It uses the second horizontal derivatives, which are calculated numerically from the measured gravity data by applying some filters of consecutive graticule spacings (the so-called here window lengths or s-values). The developed scheme has been verified on various noise-free synthetic models. Following that, the accuracy of the scheme has been assessed on a number of noisy synthetic examples. Finally, the developed technique has been successfully applied to two real data examples from India and the United States of America. It is found that the model parameters obtained from the scheme developed here are in good agreement with those reported in the published literature. Unlabelled Image • New method is utilized to model two-sided faults based upon particle swarm optimization and second horizontal gradient. • The proposed method is applied to four synthetic models and two field gravity data sets. • The method can be applied in mineral exploration and studying fault hazards. [ABSTRACT FROM AUTHOR]