Magnetotelluric impedances and parametric sensitivities for 1-D anisotropic layered media

摘要: Anisotropy of the electrical conductivity within Earth has recently provided a significant link between geoelectrical models and underlying tectonic setting. Interpretation magnetotelluric data for anisotropic conductivities suffers from inherent ambiguity, even theoretically distinguishable parameters resolution pattern may be rather complex as compared to isotropic models. As tool sensitivity studies, we present an algorithm jointly evaluating impedances their partial derivatives with respect 1-D generally layered medium. The is based on impedance propagation formulas through stack layers direct differentiation model parameters. By virtue equivalency principle, situation medium can always reduced in magnetotellurics simpler horizontally layers. rotating into local anisotropy strike, two wave modes layer quasi-separated, elimination positive exponential factors possible, which stabilizes both calculations. performance demonstrated simple qualitative study four-layer depth-variable