Images of the magnetotelluric apparent resistivity tensor

摘要: SUMMARY We present a method for converting the magnetotelluric (MT) impedance tensor into an apparent resistivity tensor. The inclusion of anisotropic permittivity and conductivity Maxwell's equations leads to expression propagation constant. To solve we assume exponentially decreasing electric fields in vertical direction, which implies that subsurface is regarded as homogeneous but anisotropic. This approach effectively makes use substitute model, contrasts strike directions anomalies are transformed equivalent amounts anisotropy. We call this number analysis (PNA). Rotationally invariant parameters calculated from physically meaningful quantities directly applicable imaging methods. Imaging results PNA compared with Egger's eigenstate LaTorraca's singular-value decomposition using synthetic data 3-D MT modelling. With PNA, obtain comprehensive image uniquely images structural details anomalies. Contrary other methods, stable significant under extreme conditions. Application Waterberg Fault Namibia unravels complicated reveals clear correlation between surface geology.