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Gravity inversion by means of growing bodies

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Camacho, AG, A.G. and Montesinos, F. G. and Vieira, Ricardo (2000) Gravity inversion by means of growing bodies. Geophysics, 65 (1). pp. 95-101. ISSN 0016-8033

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Official URL: http://geophysics.geoscienceworld.org/content/65/1/95.full.pdf+html




Abstract

This paper presents a gravity inversion method for determining the volumes of bodies with pre-established density contrasts. The method works step-by-step on a prismatic partition of the subsurface volume, expanding the anomalous bodies to fit the observed gravity values in a systematic exploration of model possibilities. The process is treated in a 3-D context; at the same time, it can determine a simple regional trend. Moreover, positive and negative density contrasts are simultaneously accepted. The solution is obtained by a double condition: (1) the e(2)-fitness to the observed gravity data (model fitness) and (2) the minimization of the total (weighted) anomalous mass (model smoothness). A positive parameter is used to balance the two minimization terms. The method is applied to a simulated example and also to a real example: the volcanic island of Gran Canaria (Canary Islands, Spain). In both cases, the results obtained show the possibilities of the method.


Item Type:Article
Uncontrolled Keywords:Canary-Islands; Gran-Canaria; Geochemistry & Geophysics
Subjects:Sciences > Physics > Geophysics
ID Code:15992
Deposited On:18 Jul 2012 10:59
Last Modified:07 Aug 2018 08:26

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