Record details

    On the interpretation of normal and inverse magnetic fabric in dikes: Examples from the Eger Graben, NW Bohemian Massif
Other titles
    K interpretaci narmální a inverzní magnetické stavby v žilách: příklady z oháreckého riftu, Český masiv
    Cajz, Vladimír
    Chadima, Martin
    Týcová, Patricie
Publication type
    článek v periodiku
Source title - serial
    Roč. 466, č. 1-2
Thesaurus term
    Anisotropy of magnetic susceptibility Anisotropy of magnetic remanence Lattice preferred orientation Sanidine EBSD Multi-function Kappabridge
Abstract (in czech)
   Na studiu vybraných žil oháreckého riftu byly studovány magnetické stavby a orientace a vlastnosti magnetických minerálů v různých typech žilných hornin v závislosti na jejich normálním/inversním charakteru. Byly diskutovány odlišné mechanismy tvorby magnetických staveb z hlediska AMS a AMR.
Abstract (in english)
   We studied magnetic fabric of selected dikes associated with the SW-NE trending Eger Graben (NW Bohemian Massif). Magnetic susceptibility varies according to rock type and reflects the relative contents of magnetic minerals. Several different types of magnetic fabric were observed in studied dikes: so-called normal and inverse magnetic fabrics and anomalous magnetic fabric. Anisotropy of anhysteretic remanent magnetization (AMR) indicate that the observed inverse magnetic fabric may be caused by the presence of SD magnetic grains; AMR fabric being normal with respect to dike margins. In contrast to that no single-domain particles were revealed using frequency dependence and anhysteretic susceptibility measurements. For further flow direction and tectonic interpretations of magnetic fabric in dikes it is suggested to use preferably the AMR fabric (at least for dikes which demonstrate significant field dependence of AMS) as it reflects the true rock fabric more accurately than AMS fabric
    Česká geologická služba
Contributor code
    ČGS (RIV)
Source format
Import date
    15. 10. 2014