Comment on the Structural Index Used in Euler Deconvolution for the Step Structure in Gravimetry

P211 COMMENT ON THE STRUCTURAL INDEX USED IN EULER DECONVOLUTION FOR THE STEP STRUCTURE IN GRAVIMETRY R. PASTEKA Abstract 1 The commonly adopted structural index value used when applying Euler deconvolution to the step/contact in gravimetry is N = 1. An argument based upon analytical considerations and empirical data suggests that the value N = −1 is more appropriate. The precise interpretation of the derivation shows that the anomalous field from this structure is not homogeneous in Euler’s sense. However it is shown that after introducing a modification of the method using the interference polynomial concept (adopted from the known