HR: 14:10h
AN: NS43A-03    [Abstracts]
TI: Cross-Gradient Joint 3D Inversion of Geophysical data
AU: * Fregoso, E
EM: fregosob@cicese.mx
AF: CICESE, Km.107 Carretera Tijuana-Ensenada, Ensenada, 22860,
AU: Gallardo, L A
EM: lgallard@cicese.mx
AF: CICESE, Km.107 Carretera Tijuana-Ensenada, Ensenada, 22860,
AB: In order to understand the complex processes that occur in the deep Earth's interior and dynamic near-surface environments, we require detailed and realistic models of multiple subsurface properties. This has leaded us to develop integrative methodologies for inversion of geophysical data. An emerging philosophy for the integrative analysis of diverse geophysical data sets is the joint inversion technique with cross-gradient constraint, which seeks to enhance the common structure that may control the spatial distribution of two physical properties. In this work, we extend the cross-gradients philosophy for joint inversion to three-dimensional environments and developed a generalized solution procedure based on a statistical formulation. This procedure is applied to potential field data as well as to seismic refraction data. The results on potential field data show that the cross- gradient joint inversion technique succeeds on finding geophysically supported models with major structural concordance between them. The three-dimensional models obtained, also showed an improved definition of the structural features partially overcoming the inherent lack of depth resolution.
DE: 0900 EXPLORATION GEOPHYSICS
SC: Near-Surface Geophysics [NS]
MN: 2007 Fall Meeting