FIRST RESULTS OF MAGNETOTELLURIC SOUNDINGS FOR MAPPING THE RIPHEAN SEDIMENTS OF THE BAIKAL FOREDEEP
https://doi.org/10.5800/GT-2021-12-3s-0553
Abstract
The article presents the first results of magnetotelluric sounding (MTS) surveys of the Baikal foredeep. This study is part of the project of the Institute of the Earth’s Crust SB RAS, which investigates the geological and geoelectrical structure of the southeastern marginal part of the Siberian platform and updates the model of the Baikal rift zone. An objective is to preliminary assess the mining potential of the Riphean strata in the Baikal foredeep. The relevance of the study centers on the possibility of discovering a new promising oil-gas field in proximity to energy-intensive industrial and agricultural enterprises. The MTS section of the sedimentary cover shows an increased conductivity of its lower part, which is most likely due to highly porous carbonate-terrigenous rocks in the middle – lower part of the ‘Baikal three-member’ structure. The intra-lithospheric conductive layer that hosts most of the earthquake hypocenters of the Baikal rift is investigated.
Keywords
Baikal foredeep,
Baikal rift,
magnetotelluric sounding,
hydrocarbon,
Riphean,
intra-lithospheric conductive layer
Supporting agencies: A part of this study was performed using the equipment of the Centre of Geodynamics and Geochronology, Institute of the Earth’s Crust SB RAS.
About the Authors
A. V. Pospeev
Institute of the Earth’s Crust, Siberian Branch of the Russian Academy of Sciences
Russian Federation
128 Lermontov St, Irkutsk 664033
Russian Federation
128 Lermontov St, Irkutsk 664033
I. K. Seminskiy
Institute of the Earth’s Crust, Siberian Branch of the Russian Academy of Sciences; SIGMA-GEO LLC
Russian Federation
Russian Federation
Igor K. Seminskiy
128 Lermontov St, Irkutsk 6640336 Zvezdinskaya St, Irkutsk 664039D. B. Nemtseva
Institute of the Earth’s Crust, Siberian Branch of the Russian Academy of Sciences; SIGMA-GEO LLC
Russian Federation
Russian Federation
128 Lermontov St, Irkutsk 664033
6 Zvezdinskaya St, Irkutsk 664039
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Review
For citations:
Pospeev A.V., Seminskiy I.K., Nemtseva D.B. FIRST RESULTS OF MAGNETOTELLURIC SOUNDINGS FOR MAPPING THE RIPHEAN SEDIMENTS OF THE BAIKAL FOREDEEP. Geodynamics & Tectonophysics. 2021;12(3S):769-775. (In Russ.) https://doi.org/10.5800/GT-2021-12-3s-0553
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