Normal and inverse magnetic fabric in dikes and sills (Eger Graben, NW Czech Republic)

0087971 - GLÚ 2008 IT eng A - Abstrakt
Chadima, Martin - Cajz, Vladimír - Hrouda, F.
Normal and inverse magnetic fabric in dikes and sills (Eger Graben, NW Czech Republic).
[Normální a inverzní magnetická stavba v žilných horninách spojených s oherským riftem.]
IUGG XXIV General Assembly. Perugia: International Union of Geodesy and Geophysics, 2007. s. 7740-7740.
[IUGG General Assembly /24./. 02.07.2007-13.07.2007, Perugia]
Grant CEP: GA AV ČR IAA300130612
Výzkumný záměr: CEZ:AV0Z30130516
Klíčová slova: AMS * dikes * normal fabric
Kód oboru RIV: DE - Zemský magnetismus, geodézie, geografie

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. 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. Measurements of AMS in variable weak magnetic fields and anhysteretic remanent magnetization (AARM) are suggested to decipher this ambiguity.
Trvalý link: http://hdl.handle.net/11104/0149671