Theoretical or Mathematical/ Earth crust geomagnetism geophysical signal processing inverse problems terrestrial electricity/ controlled-source tensor magnetotelluric data layered Earth azimuthal anisotropy Inversion fractures crust crystalline areas upper brittle region deep fluid-filled fractures transfer functions ...
RadiomagnetotelluricsElectromagneticsSedimentsResistivityWe have combined tensor radio magnetotelluric- (RMT, 15–250kHz) and controlled source tensor magnetotelluric (CSTMT, 1–12kHz) data for the mapping of aquifers in gravel formations lying in between crystalline bedrock and clay rich sediments in the ...
Through simulating a 3D resistivity axial anisotropy geoelectric model, we compare and analyze the responses of equatorial configuration, axial configuration, two oblique sources and tensor source. The research shows that the tensor source is suitable for CSAMT to recognize the anisotropic effect of ...
In general, the HMD and HED sources are preferred for soundings in the far-field zone, due to the versatility of the transmitter's geometry, and to the possibility of tensor measurements and use of 2D-3D magnetotelluric codes for data interpretation. In the case of the homogeneous half-space...
controlled-sourcelayered earthtensor magnetotelluricsSUMMARYWe consider a model for fracture-generated anisotropy in the crust represented by a layered earth with azimuthal anisotropy. A theory has been developed to compute electromagnetic fields induced by grounded electric dipoles on such a model. A ...
frame of recently developed concepts of controlled source tensor magnetotellurics (Qian & Pedersen 1991; Li & Pedersen 1991), in which a pair of horizontal dipole (electric or magnetic) sources are used to determine impedance tensor and tipper functions, that are independent of source orientations....