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On the interpretation of normal and inverse magnetic fabric in dikes: Examples from the Eger Graben, NW Bohemian Massif
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SYSNO ASEP 0321769 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title On the interpretation of normal and inverse magnetic fabric in dikes: Examples from the Eger Graben, NW Bohemian Massif Title Příspěvek k interpretaci normální a inverzní magnetické stavby na příkladu oháreckého riftu, sz. Českého masivu Author(s) Chadima, Martin (GLU-S) RID, SAI
Cajz, Vladimír (GLU-S) RID, SAI, ORCID
Týcová, P. (CZ)Source Title Tectonophysics. - : Elsevier - ISSN 0040-1951
Roč. 466, 1-2 (2009), s. 47-63Number of pages 17 s. Publication form WWW - WWW Language eng - English Country NL - Netherlands Keywords anisotropy of magnetic remanence ; anisotropy of magnetic susceptibility ; EBSD ; Lattice prefered orientation ; multifunkction Kappabridge Subject RIV DE - Earth Magnetism, Geodesy, Geography R&D Projects IAA300130612 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z30130516 - GLU-S (2005-2011) UT WOS 000264470600005 EID SCOPUS 59949087726 DOI 10.1016/j.tecto.2008.09.005 Annotation Normal or 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. The ambiguity in physical vs. geological cause of normal/inverse magnetic fabric must be answered before any successful geological interpretation of magnetic fabric can be made. In order to address this problem, we studied magnetic fabric of selected dikes associated with the SW–NE trending Eger Graben (NW Bohemian Massif). The type of magnetic fabric is lithology-dependent: normal magnetic fabric was found in bostonite and trachybasalt dikes, inverse magnetic fabric was found in camptonite dikes. It is suggested to use preferably anisotropy of magnetic remanence as it reflects the ‘true’ rock fabric more accurately than AMS fabric. Workplace Institute of Geology Contact Jana Popelková, popelkova@gli.cas.cz, Sabina Janíčková, Tel.: 233 087 272 Year of Publishing 2009
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