Počet záznamů: 1

Microstructure of selected metamorphic rock types - application of petrographic image analysis

  1. 1.
    0357076 - USMH-B 2011 RIV CZ eng J - Článek v odborném periodiku
    Šachlová, Š. - Schenk, Vladimír - Schenková, Zdeňka
    Microstructure of selected metamorphic rock types - application of petrographic image analysis.
    Acta geodynamica et geomaterialia. Roč. 7, č. 4 (2010), s. 431-443 ISSN 1214-9705
    Grant CEP: GA MŠk(CZ) LC506
    Výzkumný záměr: CEZ:AV0Z30460519
    Klíčová slova: metamorphic rock * texture * structure
    Kód oboru RIV: DB - Geologie a mineralogie
    Impakt faktor: 0.452, rok: 2010
    www.irsm.cas.cz/abstracts/AGG/04_10/4_Sachlova.pdf www.irsm.cas.cz/abstracts/AGG/04_10/4_Sachlova.pdf

    Microscopic techniques, such as polarising microscopy and scanning electron microscopy with energy dispersive spectrometer (SEM/EDS), were used in combination with petrographic image analysis with the aim of a quantitative determination of the mineral composition, rock microstructure, and degree of metamorphism of selected quartz-rich metamorphic rock types. Sampled orthogneiss rock types are mainly composed of feldspar, quartz, biotite, and amphibole. The grains are less isometric, elongated, having smooth boundaries, and showing a weak preferential orientation. The deformation and recrystallization characteristics of quartz indicate high-temperature recrystallization (the grain boundary migration recrystallization mechanism). Schist and phyllite rock types are preferentially very-fine to fine-grained, showing a strong shape preferred orientation. Their sedimentary origin was indicated by the presence of graphite.
    Trvalý link: http://hdl.handle.net/11104/0195439