Correction of seafloor magnetotelluric data for topographic effects during inversion
نویسندگان
چکیده
منابع مشابه
Three-dimensional inversion of magnetotelluric data in complex geological structures
Int erp retation of magneto telluri c data over inhomogeneous geolog ical st ructures is st ill a challenging problem in geophysical exploration. We have developed a new 3-D MT inversion method and a computer code based on full nonlinear conjugate gradient inversion and quasi analyt ical approximation for forward modeling solut ion. Appli cat ion of the QA approximation to forward model ing a...
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We report on progress in developing a magnetotelluric inversion method for two-dimensional anisotropic conductivity distribution. A standard two-dimensional model is discretized into a number of rectangular cells, each with a constant conductivity tensor, and the solution of the inverse problem is obtained by minimizing a global objective functional consisting of data misfit, a structural const...
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Inversion of MT data is an inherently nonunique and unstable problem due to the ill-posedness of the electromagnetic inverse problem. A variety of models may fit the data very well. To overcome this illposed nature of the inverse problem, we use Tikhonov’s regularization in which the ill-posed problem is replaced by a family of well-posed problems. We also analyze the behavior of the Tikhonov r...
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15 صفحه اولA Seafloor Magnetotelluric Sounding in the Tasman Sea
This paper reports an analysis of electromagnetic data from a site occupied on the floor of the Tasman Sea during an Australia-U.S. research program, the Tasman Project of Seafloor Magnetotelluric Exploration. This site (37ø33'S, 155ø58'E, depth 4450 m) is in the central portion of the Tasman Sea, and near both a fossil spreading ridge and the Tasmantid Seamount Chain. The extensive electric an...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research
سال: 2005
ISSN: 0148-0227
DOI: 10.1029/2004jb003463