Magnetotelluric Data Interpretation for Highly Resistive Shallow Environment

The paper considered an approach to the magnetotelluric (MT) data interpretation regarding to the near-surface heterogeneity influence attenuation. The analysis of spatial conductivity distribution within the central part of Nepa-Botuobinskaya anticlise studied with transient electromagnetic method (TEM) in the near field zone was carried out. The geoelectric model was built based on typical quasi-longitudinal MT curve inversion of the south of Siberian craton. The model was adjusted by placing heterogeneities into the upper part of the section. Polarization curves for electric and magnetic fields had been calculated for this model with respect to the galvanic shift. Acquired data had been spatially filtered. According to the conducted research results the approach to the near-surface heterogeneity influence attenuation for MT data interpretation was proposed.