Record details

    Metabasic rocks of the Rudawy Janowickie and Lasocki Range - their significance in the study of metamorphic evolution of the East Karkonosze Complex (West Sudetes, NE Bohemian Massif)
Statement of responsibility
    Witold Smulikowski
Other titles
    Metabazyty Rudaw Janowickich i Grzbietu Lasockiego i ich znaczenia dla poznania metamorficznej ewolucji kompleksu wschodnich Karkonoszy (Sudety Zachodnie, NE czesc masywu czeskiego)
    Smulikowski, Witold
Source title - serial
    Archiwum Mineralogiczne
    Vol. 52, no. 2
    p. 211-273
    6 obr., 8 fot., 6 tab., 4 s.bibl.
    Polské resumé
    Zkr. název ser.: Arch. mineral. (Warszawa)
Subject group
    chemismus minerálů
    krkonošsko-jizerské krystalinikum
    minerály horninotvorné
    vrásnění variské
Geographical name
    Polsko - jihozápad
    Svoboda nad Úpou (Trutnov)
    Žacléř (Trutnov)
Abstract (in english)
   In the Rýchory-Lasocki Range-Rudawy Janowickie metamorphic complex in the West Sudetes, called East karkonosze Complex, the highly diversified metabasic rocks occur. In the Polish part of the complex they belong to two formations separated by the dislocation zone; the Leszczyniec Volcanic Formation (LVF) and the Czarnów Schist Formation (CSF). Minerals of metabasites, i.e. plagioclase, amphibole, epidote, chlorite, stilpnomelane, phengite and others show wide variation in composition, which is presented in graphs and tables of electron-probe analyses. Plagioclase of CSF metabasites varies from albite to andesine, exceptionally even anorthite was observed, but in LVF it is only albite. Ca-amphiboles in CSF vary from actinolite to Fe-pargasite and hastingsitic Fe-hornblende, all with relatively low Ti content. In LVF they fall within the range from actinolite to pargasitic Fe-hornblende. In particular two varieties of Mg-hornblende were distinguished with higher and lower Ti contents.
   In numerous zoned amphibole grains, olive higher-Ti hornblende or almost colourless actinolite constitute the central parts while blue-green lower-Ti hornblende forms the margins. On the basis of mineral, mainly amphibole compositions and microstructural relationships, referring to the former paper on glaucophane-schist facies rocks (Smulikowski 1995a), the following 3 events of regional metamorphism have been distinguished: I - amphibolite facies related to the Early Ordovician see-floor spreading, II - high P/T metamorphism (glaucophane-schist f., greenschist f., epidote-amphibolite f.) of the collisional subduction/obduction regime, followed by III - medium to low P/T greenschist facies metamorphism, both of the Early variscan. The last metamorphic event in the complex was IV - contact metamorphism (up to amphibolite facies) related to the Late Variscan Karkonosze granite intrusion
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
Entered date
    21. 3. 2008
Import date
    8. 8. 2012