Abstract: The model of the electrical resistivity distribution within the Bohemian Massif (BM) to crustal and uppermost-mantle depths was derived from a series of magnetotelluric (MT) stations in the Czech and Slovak Republics. Estimates of electric resistivity to crustal and mid-mantle depths were obtained especially from MT data for periods ranging from pulsations to long-period variations, and further from the magnetic continuum spectrum method using the data of the Budkov and Prhonice permanent observatories (Geophysical Institute, Acad. Sci, Czech Republic, Prague). Zones of prominent geoelectrical inhomogeneities were mapped from distribution of the geomagnetic induction vectors across the European area. The ranges of apparent resistivities in the Bohemian Massif were compared with those obtained from induction scale lengths (ISL) and W₁-responses at relevant central European observatories. The conductivity ranges were estimated from the resistivity/depth graph corresponding to the substitute perfect conductor inversion.

Key words: Crustal and mantle conductivity, Geoelectrical inhomogeneities, Central Europe

摘要： 根据捷克和斯洛伐克电磁台站的数据,得到波西米亚块体地壳和上地幔的电阻率分布模型。估计电阻率时特别使用了短周期和长周期的电磁数据以及用连续谱方法对固定台站数据的分析结果。根据欧洲地磁感应矢量分布绘出了显著的地电不均匀带的地图,将波西米亚块体的视电阻率与中欧有关台站的感应标量长度与W₁响应做了比较,并根据电阻率/深度图估计了电导率范围,该图与替代性理想导体反演相对应。

关键词: 地壳地幔电导率, 地电不均匀性, 中欧