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The Lithosphere Structure in the Northern Part of the Southern Sikhote-Alin Region According to the Magnetotelluric Sounding Data

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Abstract

The magnetotelluric sounding results obtained in three profiles in the northern part of the Southern Sikhote-Alin region across its strike have been considered. Geoelectric sections have been constructed to a depth of 150 km and a three-dimensional model of electrical resistivity of the study area has been calculated. Sections have been constructed for depths of 5.5, 9, 15, 20, 30, and 40 km. Based on the obtained materials, the geoelectric heterogeneities of the study area have been analyzed and their geological interpretation has been proposed. Low electrical resistivity anomalies of less than 100 Ohm m located at depths from the surface of up to 40 km have been identified within the earth’s crust, and their morphological features have been shown. Some of them are related to deep faults, while others are spatially correlated with known ore districts and record the regions with an anomalously high destruction and fluid saturation of the earth’s crust, which are likely areas enriched in conductive ore minerals. The spatial distribution of the coast effect and its influence on the magnetovariation parameters within the study area have been considered.

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Funding

The studies were supported by the Russian Science Foundation (grant no. 22-27-00031).

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Authors and Affiliations

  1. Kosygin Institute of Tectonics and Geophysics, Far East Branch, Russian Academy of Sciences, 680000, Khabarovsk, Russia

    V. B. Kaplun & A. K. Bronnikov

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  1. V. B. Kaplun
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  2. A. K. Bronnikov
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Correspondence to V. B. Kaplun.

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Translated by E. Maslennikova

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Kaplun, V.B., Bronnikov, A.K. The Lithosphere Structure in the Northern Part of the Southern Sikhote-Alin Region According to the Magnetotelluric Sounding Data. Russ. J. of Pac. Geol. 17 (Suppl 1), S1–S10 (2023). https://doi.org/10.1134/S1819714023070035

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