Moscow University Geology Bulletin ( IF 0.3 ) Pub Date : 2022-04-14 , DOI: 10.3103/s0145875222010082 V. A. Kulikov 1 , A. P. Ionicheva 1 , A. V. Korol’kova 1 , P. Yu. Pushkarev 1 , A. G. Yakovlev 1 , E. Yu. Sokolova 2
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Abstract
The results of the interpretation of the magnetotelluric sounding data obtained in the Southern Ladoga region are presented. When performing 3D inversion, both new data obtained by the LADOGA working group in 2018–2021 and data from the 1-EV profile (the “Loop” segment) carried out in the early 2000s were used. Based on the results of automatic inversion carried out with a help of ModEM program (Egbert and Kelbert), a 3D geoelectric model of the Earth’s crust to a depth of 60 km has been constructed, which demonstrates the complex inhomogeneous structure of the studied territory. Two anomalous zones of crustal electrical conductivity oriented SE and NE are distinguished in the geoelectric model; the first one is a continuation of the well-known Ladoga anomaly. The presence of the second conductive structure confirms the results of the single-site magnetovariational soundings performed by I.I. Rokityansky in the several segments of the East European Platform in the early 1980s.
中文翻译：
拉多加南部地区大地电磁探测数据的 3D 反演
摘要
介绍了在南拉多加地区获得的大地电磁探测数据的解释结果。在进行 3D 反演时，既使用了 LADOGA 工作组在 2018-2021 年获得的新数据，也使用了 2000 年代初进行的 1-EV 剖面（“循环”部分）的数据。基于ModeEM程序（Egbert和Kelbert）的自动反演结果，构建了60公里深度的地壳3D地电模型，展示了研究区域复杂的非均匀结构。在地电模型中区分了两个向东南和东北方向的地壳电导率异常带；第一个是著名的拉多加异常的延续。
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