P215 3D GRAVITY DATA INVERSION FOR ESTIMATING SHAPE OF AN ORE BODY 1 3D inversion of gravity data was carried out to find the extension of a koromite ore body. After applying all corrections the regional trend is eleminated by fitting orthonormal polynomials to the data. The data region is parameterized by rectangular blocks. Since the ore body had outcropt the residual data is inverted for the depth to the top of the models with fixed density contrast between the ore body and the surounding medium. The inversion is executed in the subspace of the model space to control the


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