Self-constrained inversion of potential fields

We present a potential-field-constrained inversion procedure based on a priori information derived exclusively from the analysis of the gravity and magnetic data (self-constrained inversion). The procedure is designed to be applied to underdetermined problems and involves scenarios where the source...

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Bibliographic Details
Published in:	Geophysical journal international Vol. 195; no. 2; pp. 854 - 869
Main Authors:	Paoletti, V., Ialongo, S., Florio, G., Fedi, M., Cella, F.
Format:	Journal Article
Language:	English
Published:	Oxford University Press 01.11.2013
Subjects:	Geopotential theory Gravity anomalies and Earth structure Magnetic anomalies: modelling and interpretation Magnetic field Inverse theory
ISSN:	0956-540X, 1365-246X
Online Access:	Get full text
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Summary:	We present a potential-field-constrained inversion procedure based on a priori information derived exclusively from the analysis of the gravity and magnetic data (self-constrained inversion). The procedure is designed to be applied to underdetermined problems and involves scenarios where the source distribution can be assumed to be of simple character. To set up effective constraints, we first estimate through the analysis of the gravity or magnetic field some or all of the following source parameters: the source depth-to-the-top, the structural index, the horizontal position of the source body edges and their dip. The second step is incorporating the information related to these constraints in the objective function as depth and spatial weighting functions. We show, through 2-D and 3-D synthetic and real data examples, that potential field-based constraints, for example, structural index, source boundaries and others, are usually enough to obtain substantial improvement in the density and magnetization models.
ISSN:	0956-540X 1365-246X
DOI:	10.1093/gji/ggt313