A Method of Estimating the Block-Like Body Under the Ground from the Polarization Ellipse of the Magnetic Field


The feasibility of using the broad-band Magnetotelluric (MT) method for locating a two-dimensional (2-D) block-like body is studied by means of numerical models. An example of its applicability for locating a block-like anomalous body indicates that the sign reversal frequency of the tilt angle, or the ellipticity responses of magnetic polarization relates to the depth of the center of the anomalous body, and also to the resistivity contrast of the anomalous body to the host rock, based on the relationship of the few nomograms are developed, that provide a new approach to the interpretation of the magnetic polarization data.

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