On the interpretation of normal and inverse magnetic fabric in dikes

0312125 - GLÚ 2009 SK eng A - Abstrakt
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]
Grant CEP: GA AV ČR IAA300130612
Výzkumný záměr: CEZ:AV0Z30130516
Klíčová slova: anisotropy of magnetic susceptibility * anisotropy of magnetic remanence * lattice preferred orientation
Kód oboru RIV: DE - Zemský magnetismus, geodézie, geografie
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.
Trvalý link: http://hdl.handle.net/11104/0163270