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Application of the pseudorelief method for the territory of the Bishkek geodynamic polygon
Authors:V Yu Batalev
Institution:1336. Research Station of Russian Academy of Sciences in Bishkek, Bishkek, 720049, Kyrgyzstan
Abstract:Based on 143 magnetotelluric soundings, the Berdichevskii impedance, the Wiese—Parkinson matrix, and the phase tensor component are calculated for the Bishkek geodynamic polygon 50 × 150 km in size. The pseudoreliefs of the apparent resistance Ro brd , phase Fi brd , Wiese-Parkinson matrix norm, and apparent phase Fi k calculated from the phase tensor are constructed. An area of the crustal conductor with elevated conductivity located below the northern part of the Chui depression is distinguished during analysis of pseudoreliefs. Its characteristics will be used for solution of the 3D direct task and creation of the starting model of 2D inversion. The reliability of anomalous objects and estimation of their size during the use of real data is caused by the fact that the anomalies are displayed by different parts of the observation system for the various parameters of the MT-field: the phases vary directly over the anomalous object, and magnetovariational parameters form the rim around it. This allows us more completely and effectively to use the network of real data.
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