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| | Abstract | | In the gravity survey, subsurface density structural models are estimated by the inversion of gravity anomaly data. The inversion method of three-dimensional density structure based on a layered structure has been conventionally used a structural model consisting of two homogeneous layers, such as a sedimentary layer and a basement. However, one drawback of this conventional method is that the sedimentary layer is normally consisting of not a homogeneous layer, but plural layers varying in density. Considering plural layers varying in density as a homogeneous layer, the conventional method can result in errors in the estimated structural model. Therefore this paper proposes an expanded inversion method that can deal with multi-layered structural models consisting of arbitrary number of layers. One feature of this method, like Hagiwara's method in the seismic refraction method, is that layer boundaries are determined in order from the top. |
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