Geological Interpretation of the Geomagnetic Anomalies of the NE Moravia and the Czech Part of SilesiaArticle PDF
Geological Interpretation of the Geomagnetic Anomalies of the NE Moravia and the Czech Part of Silesia
A semi-detailed ground magnetic survey carried out by portable proton magnetometers during 1999-2002 supplied a new comprehensive pattern of the geomagnetic field in the NE part of the Czech Repub1ic. Three types of the anomalies were distinguished in this area. The short-wave anomalies situated predominantly in the central part of the area studied belong to volcanic bodies of the teschenite association (Cretaceous to Jurassic age). Not frequently distributed middle-wave anomalies are interpreted as a response of buried Late Paleozoic intermediate volcanites that have been found only in borehole cores, yet. The long-wave anomalies cover two partial areas, the first one is in the N (in the Opava-Bohumín area), the second one is situated in the Beskydy Mts. and in its W and S surroundings. Both of them are considered to be the response of the Brunovistulian crystalline basement. The extent of the buried southern part of the Upper Silesian coal-bearing Basin is interpreted and compared with the basement structure being interpreted from the geomagnetic field pattern.
Ivan Gnojek, co-worker of the Miligal Ltd. and external consultant of the Czech Geological Survey, M. Hübnerové 42, 621 00 Brno, Czech Republic, e-mail: email@example.com