In this paper a number of technical details related to a new method of gravimetric-seismic inversion, which is still under development, are explained. Although the present contribution aims on providing general statements on how to formulate and solve complex gravimetric-seismic modeling; problems, the inspiration comes from the practical modeling problems in the area of Jutland peninsula (Denmark). More specifically, the methodological aspects of the proposed inversion method are illustrated on a problem of 3D modeling of the intra crustal intrusion associated with the Silkeborg Gravity High. The existing refraction seismic profile locates the source of the anomaly in depths 10 km - 18 km. In an earlier publication, (Strykowski, 1998), and for the same test area, a method of complex geological stripping is described. The present contribution is a continuation of this paper in the direction of inversion. The main methodological innovation (of both papers) is a balanced mathematical formulation of the problem and the way the seismic and the gravimetric information is coupled. The specific technical details discussed here are: stripping of the effects of deeper sources, geophysically controlled extraction of the surface gravity signal generated by the target source, and, finally, the inversion by parts (i.e. inversion only on parts of the gravity signal). Concerning the inversion by parts, only the initial step is presented and discussed here.
|Journal||Physics and Chemistry of the Earth Part A-solid Earth and Geodesy|
|Publication status||Published - 1999|