APPLICATION OF INVERSION TECHNIQUES ON MARINE MAGNETIC DATA - ANDAMANSHELF

Analysis of the total intensity magnetic data over the western Andaman shelf has been carried out for determination of depth to magnetic bas ement using the Analytical signal and Werner Deconvolution methods. Th e basement depths are refined with optimisation procedure of iteration modelling. The depths Derived from these methods match well with the acoustic basement mapped by the seismic reflection survey across the A ndaman shelf. The interpretation by these methods demonstrates the rap id utility in virgin areas for deriving the first order basement confi guration quickly. The gradual slope of the basement from west to east on the western Andaman shelf may be attributed to the ongoing process of the subduction of the older crust in the Sunda Trough.