Nonlinear 3-D inversion of gravity data over a sulfide ore body

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Published: Apr 1, 2000
DOI: https://doi.org/10.22201/igeof.00167169p.2000.39.2.275
Keywords:
México, Zacatecas, mineral deposits, gravimetry, horizontal gradient, 3-D non-linear inversion

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J. García-Abdeslem
CICESE, División de Ciencias de la Tierra, Departamento de Geofísica Aplicada, Ensenada, B. C., México
https://orcid.org/0000-0003-2789-975X

Abstract

The horizontal gravity gradient and the principle of superposition of potential fields are used in the interpretation of gravity data from a sulfide ore body in terms of a 3-D structure of densities. The ore body is constituted of massive and disseminated sulfides, mainly of sphalerite, hosted in limestone. The horizontal gradient of the gravity anomaly lead to a rough estimate of the lateral extent of the ore body. The interpretation of the gravity data is posed as an inverse problem, and carried out iteratively, following a damped least-squares criteria. The inverse modeling was constrained with information on densities and thickness of the ore body, obtained from a borehole drilled over the ore body.

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García-Abdeslem, J. (2000). Nonlinear 3-D inversion of gravity data over a sulfide ore body. Geofisica Internacional, 39(2), 179–188. https://doi.org/10.22201/igeof.00167169p.2000.39.2.275
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Vol. 39 No. 2 (2000): April 1, 2000
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This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

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