Some technical details concerning a new method of gravimetric-seismic inversion

In this paper a number of technical details related to a new method of grav imetric-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 J utland peninsula (Denmark). More specifically, the methodological aspects o f 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 contribu tion is a continuation of this paper in the direction of inversion. The mai n methodological innovation (of both papers) is a balanced mathematical for mulation of the problem and the way the seismic and the gravimetric informa tion is coupled. The specific technical details discussed here are: stripping of the effects of deeper sources, geophysically controlled extraction of the surface grav ity signal generated by the target source, and, finally, the inversion by p arts (i.e. inversion only on parts of the gravity signal). Concerning the i nversion by parts, only the initial step is presented and discussed here. ( C) 1999 Elsevier Science Ltd. All rights reserved.