Numerical inversion of two-dimensional geoelectric conductivity distributions from magnetotelluric data
نویسندگان
چکیده
منابع مشابه
Magnetotelluric inversion for 2D anisotropic conductivity structures
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...
متن کاملTwo - dimensional magnetotelluric inversion of blocky geoelectrical structures
of the traditional smooth inversion this information is provided as [2J The two-dimensional (2-D) magnetotelluric inverse problem an assumption that the solution, the geoelectrical model in the MT has been addressed by several authors. The most well-known case, should be represented by smooth functions. At the same time, approaches are the search for a smooth model [de Groot-Hedlin in some geol...
متن کاملThree-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...
متن کاملRegularization analysis of three-dimensional magnetotelluric inversion
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...
متن کاملThree-dimensional Magnetotelluric Modeling of data from Northeast of Gorgan Plain
Magnetotelluric measurements have been conducted in the period range of 0.005-128 s along five parallel east-west directed profiles including 85 sites totally in the north-eastern part of Gorgan Plain, Golestan Province, North of Iran; with the aim of exploring iodine. Distortion and dimensionality analysis of data imply the existence of a north-south elongated two-dimensional model with some l...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Revista Brasileira de Geofísica
سال: 1997
ISSN: 0102-261X
DOI: 10.1590/s0102-261x1997000200003