Dyke Swarm Pattern and Tectonics in the České Středohoří Mts. Volcanic Centre, Ohře (Eger) Rift, Central Europe (Starting Points for Further Research)

0145797 - GLU-S 20033169 RIV CZ eng J - Journal Article
Cajz, Vladimír
Dyke Swarm Pattern and Tectonics in the České Středohoří Mts. Volcanic Centre, Ohře (Eger) Rift, Central Europe (Starting Points for Further Research).
Geolines. Roč. 15, - (2003), s. 15-22. ISSN 1210-9606.
[Hibsch 2002 Symposium. Teplá near Třebenice, Ústí nad Labem, Mariánské Lázně, 03.06.2002-08.06.2002]
R&D Projects: GA AV ČR IAA3013102
Institutional research plan: CEZ:AV0Z3013912
Keywords : Tectonics and radiating dyke swarm * volcanic centre * the České středohoří Mts.
Subject RIV: DB - Geology ; Mineralogy
http://geolines.gli.cas.cz/fileadmin/volumes/volume15/G15-015.pdf

Orientation data on the radiating dyke swarm of lamprophyres, semilamprophyres, felsic derivates and common basaltic rocks in the area of the volcanic centre of the České středohoří Mts. were compared with the newly recognized tectonics inside the superficial volcanic products of the complex. Strike E-W is the most common in all rock groups of the dyke swarm and strike N-S is frequent for dykes of the lamprophyre and semilamprophyre groups. Strikes NNW-SSE and NW-SE to WNW-ESE are present in all groups, too. Faults show the same strike. Orientations of steeply inclined dykes, compared with the strikes of faults, support the idea that the dyke emplacement was controlled by syngenetic regional stress regime using pre-existing rupture systems. The inclination data of moderately inclined dykes indicate their emplacement into a paired fracture system striking NW-SE and NE-SW to NNE-SSW. A change in regional stress regime is presumed during the development of the dyke swarm.
Permanent Link: http://hdl.handle.net/11104/0043346