Abstract
A competent interpretation technique to estimate the model parameters such as amplitude coefficient (k), exact origin of causative source (x0) depth (z0) and the shape factor (q) from the total gradient computed from the horizontal and vertical derivatives of gravity and magnetic data has been presented. Global optimization of the analytic signal or the total gradient of potential field data from single and multiple sources with different idealized structures was carried out using Very Fast Simulated Annealing (VFSA) technique. The inversion of the data shows that the present method can accurately determine all model parameter. The parameters estimated specifically the depth of the buried ore bodies were in respectable agreement with the actual model parameters. Delineated histogram, cross-plots and convergence suggest that the interpretations are within the uncertainty limits. The method adopted in this study is as consistent as the others such as PSO, ACO and DE. The method has been effectively applied in noise free and noise corrupted data along with two field data from Quebec, Canada (Gravity data—Mobrun Massive Sulphide Body, Noranda, and Magnetic data—Barraute, North-West) with the presence of sulfide bodies buried at different depths and two from Turkey (Kesikkopru and Marmara anomaly) related to iron ore deposit and deep seated magnetic deposit.
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