Abstract —We present the results of magnetovariational soundings at two sites (Tiksi Observatory and Kotelny Island in the Laptev Sea region of the Arctic) and their three-dimensional (3D) inversion using the ModEM program. In the models obtained by the inversion, the conductive heterogeneities are present in the regions of the both sites down to a depth of 200 km in the region of the observatory and 100 km beneath the Kotelny Island. The geoelectric heterogeneities in the model in the region of the observatory are most contrasting and voluminous, whereas beneath the island they are more localized. The correlation between the locations of these heterogeneities at both sites and the features of the geological and geophysical structure of the region is noted. It is shown that the applied algorithm of data processing eliminates the effect of the polar electrojet which provides the possibility to study the geoelectric structure of the region by magnetovariational method.

中文翻译：

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北极磁变测深经验：拉普捷夫海域

摘要——我们展示了两个站点（北极拉普捷夫海地区的 Tiksi 天文台和 Kotelny 岛）的磁变测深结果及其使用 ModEM 程序进行三维 (3D) 反演的结果。在通过反演获得的模型中，两个站点的区域都存在导电异质性，天文台区域深达 200 公里，科特尔尼岛下方 100 公里。天文台区域模型中的地电异质性差异最大，数量最多，而在岛屿下方，它们更局部化。注意到两个地点的这些异质性的位置与该地区地质和地球物理结构的特征之间的相关性。