12. Inversion Strategy

Excerpt

The past decade witnessed the striking technological and methodological advances in exploration and academic magnetotellurics. Field equipments ensuring a stable determination of magnetotelluric and magnetovariational response functions have been worked out. Effective programs have been developed for 1D, 2D and even 3D inversions of impedances and tippers. Magnetovariational sounding, for many years considered as an assistant in localizing and identifying the geoelectric structures, has been put in the forefront of the modern magnetotellurics. It became a powerful tool for resolving and studying the horizontal and vertical conductivity distribution without static shift problem. New approaches to the analysis and interpretation widening the informativeness of geoelectrics have been proposed. Field investigations have been conducted in many tectonic provinces of the world providing basically new information on the Earth’s crust and upper mantle that essentially supplements the results obtained by seismics. …