Characteristics of fault structures according to electric soundings. Fault modeling
Category: 15-3
UDC 550.344
N.N. Nevedrova(1), A.M. Sanchaa(1), I.V. Surodina(2)
(1) Trofimuk Institute of Petroleum Geology and Geophysics SB RAS, Novosibirsk, Russia
(2) Institute of Computational Mathematics and Mathematical Geophysics SB RAS, Novosibirsk, Russia
Abstract. We discuss characteristics of interpretation of geoelectrical data with a controlled source, obtained in two seismoactive areas – the Baikal rift zone and the Altai-Sayanskaya mountain belt. The technique and processing strategy are formulated, geoelectric models of the most complex areas with presence of fault disturbances are presented, and geoelectric parameters of fault zones obtained as a result of interpretation of field data and mathematical modeling are evaluated.
Keywords: vertical electric sounding, 2D inversion, mathematical modeling.
References
De Mers M.N., Geograficheskie informatsionnye sistemy. Osnovy (Geographic information systems. Basics), Moscow: Dafa +, 1999.
Dobretsov N.L., Osnovy tektoniki i geodinamiki (Fundamentals of tectonics and geodynamics), Novosibirsk: NGU, 2011.
Epov M.I., Dashevskii Yu.A., and El'tsov I.N., Avtomatizirovannaya interpretatsiya elektromagnitnykh zondirovanii (Automated interpretation of electromagnetic soundings), Prepr. No. 3, Novosibirsk: IGG SO AN SSSR, 1990.
Lunina O. V. and Gladkov A. S., Active Faults and Stress Fields at the Northeastern Flanks of the Baikal Rift Zone, Geol. Geofiz., 2008, vol. 49, no. 2, pp. 146–160.
Nevedrova N. N., Surodina I. V., and Sanchaa A. M., 3D Modeling of Complex Geoelectric Structures, Geophysics, 2007, no. 1, pp. 36–41.
Nevedrova N.N., Epov M.I., and Dashevskii Yu.A., Determining the structure of the rock mass and the analysis of electromagnetic monitoring at the Baikal prognostic site, Fiziko-tekhnicheskie problemy razrabotki poleznykh iskopaemych (Physical and technical problems of mining), 2004, no. 3, pp. 29-45.
Seismogeology and Detailed Seismic Demarcation of the Baikal Region, Ed. by V. P. Solonenko, Novosibirsk: Nauka, 1981.
Seminskii K.Zh., Vnutrennyaya struktura kontinental’nykh razlomnykh zon. Tektonofizicheskii aspekt (The internal structure of the continental fault zones. Tectonophysical aspect), Novosibirsk: GEO, 2003.
Sherman S.I., Bornyakov S.A., and Buddha V.Yu., Oblasti dinamicheskogo vliyaniya razlomov (Areas of dynamic influence of faults), Novosibirsk: Nauka.
Spitzer K. A., 3-D finite-difference algorithm for DC resistivity modeling using conjugate gradient methods, Geophys. J. Int., 1995, vol. 123, pp. 903–914.
Zhdanov M.S., Geofizicheskaya elektromagninaya teoriya i metody (Geophysical electromagnetic theory and methods), Moscow: Nauchnyi mir, 2012.