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3D gravity inversion with Euler deconvolution as a priori information  

Rim, Hyoung-Rae (Korea Institute of Geoscience and Mineral Resources)
Park, Yeong-Sue (Korea Institute of Geoscience and Mineral Resources)
Lim, Mu-Taek (Korea Institute of Geoscience and Mineral Resources)
Koo, Sung-Bon (Korea Institute of Geoscience and Mineral Resources)
Kwon, Byung-Doo (Department of Earth Sciences Education, Seoul National University)
Publication Information
Geophysics and Geophysical Exploration / v.10, no.1, 2007 , pp. 44-49 More about this Journal
Abstract
It is difficult to obtain high-resolution images by 3D gravity inversion, because the problem is extremely underdetermined - there are too many model parameters. In order to reduce the number of model parameters we propose a 3D gravity inversion scheme utilising Euler deconvolution as a priori information. The essential point of this scheme is the reduction of the nonuniqueness of solutions by restricting the inversion space with the help of Euler deconvolution. We carry out a systematic exploration of the growing body process, but only in the restricted space within a certain radius of the Euler solutions. We have tested our method with synthetic gravity data, and also applied it to a real dataset, to delineate underground cavities in a limestone area. We found that we obtained a more reasonable subsurface density image by means of this combination between the Euler solution and the inversion process.
Keywords
Euler deconvolution; gravity inversion; nonuniqueness;
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