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On the interpretation of normal and inverse magnetic fabric in dikes
- 1.0312125 - GLÚ 2009 SK eng A - Abstract
Chadima, Martin - Hrouda, F. - Cajz, Vladimír
On the interpretation of normal and inverse magnetic fabric in dikes.
[Příspěvek k interpretaci normální a inverzní magnetické stavby v žilách.]
Contributions to Geophysics & Geodesy. Roč. 38, special issue (2008), s. 39-40. ISSN 1335-2806.
[Paleo, Rock and Environmental Magnetism. Castle Meeting /11./. 22.06.2008-28.06.2008, Bojnice]
R&D Projects: GA AV ČR IAA300130612
Institutional research plan: CEZ:AV0Z30130516
Keywords : anisotropy of magnetic susceptibility * anisotropy of magnetic remanence * lattice preferred orientation
Subject RIV: DE - Earth Magnetism, Geodesy, Geography
http://gauss.savba.sk/GPIweb/conferences/nt2008/abstr/Chadima-1.pdf
Recent studies of igneous rocks indicate that the predominant occurrence of normal/inverse fabric in dikes may either reflect the presence of multi-domain (MD)/single-domain (SD) grains or it may result from different orientation mechanisms of magnetic minerals in magmas of different viscosities. In order to address this problem, we studied magnetic fabric of selected dikes associated with the SW-NE trending Eger Graben (NW Bohemian Massif). Normal magnetic fabric with magnetic foliations and subhorizontal magnetic lineations both parallel to the dike margins was found in bostonite and trachybasalt dikes. Inverse magnetic fabric with magnetic lineations and magnetic foliations perpendicular to the dike margins was found in camptonite dikes.
Permanent Link: http://hdl.handle.net/11104/0163270
Number of the records: 1