Odek Antony, Githiri John, K'Orowe Maurice, Ambusso Willis, Kenya
Depth imaging in gravity survey is very important in mineral prospecting. A number of techniques ranging from manual measurements of anomaly characteristic and the application of empirically derived formulae to modern automated analysis of gravity data have been developed. The automatic techniques range from standard Euler deconvolution, extended Euler deconvolution, Werner deconvolution and Analytic signal among others. The quality of interpretation depends on how well the data is constrained using other geological and geophysical information. The results can further be improved by integrating different interpretation techniques. In this study attempt has been made to interpret the depth of the gravity anomaly causative bodies in Migori Greenstone belt using 3D Werner deconvolution. Werner deconvolution technique has been widely used for rapid interpretation of magnetic data and in this study it has been extended to gravity by performing a vertical derivative to yield a pseudo magnetic field. Oasis montaj application software was then used to generate Werner solutions. Shallow gravity structures are mapped from the surface to a limiting depth of approximately 1,000 m. These structures agree well with the other interpretation techniques and known geology of the area.