A GEOLOGICAL-GEOPHYSICAL MODEL OF THE LENS IN THE JUNCTION ZONE OF THE CHU BASIN AND THE KYRGYZ RANGE (Northern Tien Shan) BY THE RESULTS OF SEISMIC TOMOGRAPHY AND MAGNETOTELLURIC SOUNDING
V.V. Spichak, A.G. Goidina
Geoelectromagnetic Research Centre, Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, Troitsk, Moskovskaya obl., 108840, Russia
Keywords: junction zone, lens, magnetotelluric sounding, seismic tomography, Northern Tien Shan
Abstract
Along the submeridional seismic and magnetotelluric profiles, crossing the junction zone of the Kyrgyz Range and the Chu basin of the Northern Tien Shan, the models of density, Poisson’s ratio, elastic modulus, silica content, temperature, and porosity have been constructed. Based on the complex analysis of the constructed profiles of physicomechanical rock properties, a geological-geophysical lens model has been constructed. This model addresses the sources of geophysical anomalies (found at the northern border of the lens) and possible mechanisms of the lens formation.
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