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Joint inversion of long‐period magnetotelluric data and surface‐wave dispersion curves for anisotropic structure: Application to data from Central Germany
Author(s) -
Roux E.,
Moorkamp M.,
Jones A. G.,
Bischoff M.,
Endrun B.,
Lebedev S.,
Meier T.
Publication year - 2011
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2010gl046358
Subject(s) - magnetotellurics , geology , anisotropy , asthenosphere , inversion (geology) , geophysics , isotropy , lithosphere , joint (building) , surface wave , seismology , geodesy , electrical resistivity and conductivity , tectonics , optics , physics , architectural engineering , engineering , quantum mechanics
Geophysical datasets sensitive to different physical parameters can be used to improve resolution of Earth's internal structure. Herein, we jointly invert long‐period magnetotelluric (MT) data and surface‐wave dispersion curves. Our approach is based on a joint inversion using a genetic algorithm for a one‐dimensional (1‐D) isotropic structure, which we extend to 1‐D anisotropic media. We apply our new anisotropic joint inversion to datasets from Central Germany demonstrating the capacity of our joint inversion algorithm to establish a 1‐D anisotropic model that fits MT and seismic datasets simultaneously and providing new information regarding the deep structure in Central Germany. The lithosphere/asthenosphere boundary is found at approx. 84 km depth and two main anisotropic layers with coincident most conductive/seismic fast‐axis direction are resolved at lower crustal and asthenospheric depths. We also quantify the amount of seismic and electrical anisotropy in the asthenosphere showing an emerging agreement between the two anisotropic coefficients.