Abstract
Results of study of supposed boundary of impenetrability in the crystalline earth crust are discussed in the article. The Murman-2018 experiment on distance DC sounding in combination with frequency and audio magnetotelluric sounding was undertaken to solve the problem. Methods of field work and data processing are presented in the first part of the work. The second part of the work is devoted to the interpretation method description and to presentation of results obtained. Impenetrability boundary is detected in the shape of the sharp resistivity increase from 104 to 106 Ω · m at a depth of 10–15 km. That boundary is accepted as transition zone between the brittle and ductile states of the earth crust substance (Brittle-Ductile Transition zone, BDT). To obtain the more reliable information on parameters of the impenetrability boundary it is necessary to conduct additional DC studies using remote sensing at distances up to 1000 km between transmitter and receiver.
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Acknowledgments
This work was supported by the grant of the RFBR 18-05-00528 (expedition) and partly with the support of the State Mission, GI KSC RAS, the subject of research 0226-2019-0052 (interpretation). The authors are deeply grateful to the lead programmer T.G. Korotkova for her help in processing and interpreting the results and V.E. Kolesnikov for his help in topographic data binding and its design.
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Zhamaletdinov, A.A., Shevtsov, A.N., Skorokhodov, A.A., Kolobov, V.V., Ivonin, V.V. (2019). Experimental Study of Impermeability Boundary in the Earth Crust. In: Zhamaletdinov, A., Rebetsky, Y. (eds) The Study of Continental Lithosphere Electrical Conductivity, Temperature and Rheology. SPS 2018. Springer Proceedings in Earth and Environmental Sciences. Springer, Cham. https://doi.org/10.1007/978-3-030-35906-5_9
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DOI: https://doi.org/10.1007/978-3-030-35906-5_9
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