Magnetovariation methods, which are applicable to study the mantle conductivity, require long lasting registration of natural magnetic field variations. Such data usually can be recorded in stationary conditions on geomagnetic observatories. The magnetotelluric and magnetovariation measurements have been carried out at seven semi-permanent sites on Ukrainian territory for approximately 10–15 years by the Ukrainian State Geological Research Institute as well as the S.I. Subbotin Institute of Geophysics of the National Academy of Sciences of Ukraine for monitoring the effects and phenomena related to electromagnetic field. Since the quality of records was acceptable, we used these data to study the Earth’s mantle conductivity peculiarities to obtain the information on sites remote from geomagnetic observatories. The Z-H method was applied to collected data to estimate the magnetovariaton transfer functions, which were concatenated with magnetotelluric ones and further inverted by the 1D OCCAM algorithm to obtain the geoelectrical cross sections for the measuring sites. To extend the region under study and to obtain more reliable results, similar data from three Ukrainian geomagnetic observatories in Kyiv, Lviv and Odessa were included in this study. Obtained conductivity models were related to the known geological structure in the upper and middle mantle beneath the Ukrainian territory.

中文翻译：

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乌克兰领土下方的地幔电导率

适用于研究地幔电导率的磁变方法要求长期记录自然磁场变化。通常可以在静止条件下将这些数据记录在地磁观测站上。乌克兰国家地质研究所和乌克兰国家科学院SI Subbotin地球物理研究所在乌克兰领土上的七个半永久站点进行了大约9-15年的大地电磁和磁变测量与电磁场有关的影响和现象。由于记录的质量是可以接受的，因此我们使用这些数据来研究地球的地幔电导率特性，以获得远离地磁观测站的地点的信息。将ZH方法应用于收集的数据以估算磁压变传递函数，将其与大地电磁传递函数连接起来，并通过一维OCCAM算法进一步求反，以获得测量部位的地电横截面。为了扩大研究范围并获得更可靠的结果，本研究包括了来自基辅，利沃夫和敖德萨的三个乌克兰地磁观测站的相似数据。获得的电导率模型与乌克兰领土下方的上地幔和中地幔的已知地质结构有关。为了扩大研究范围并获得更可靠的结果，本研究包括了来自基辅，利沃夫和敖德萨的三个乌克兰地磁观测站的相似数据。获得的电导率模型与乌克兰领土下方的上地幔和中地幔的已知地质结构有关。为了扩大研究范围并获得更可靠的结果，该研究包括了来自基辅，利沃夫和敖德萨的三个乌克兰地磁观测站的相似数据。获得的电导率模型与乌克兰领土下方的上地幔和中地幔的已知地质结构有关。