Record details

Title
    Granulite facies metabasites in the Náměšť granulite complex, western Moravia
Statement of responsibility
    Dušan Němec
Author
    Němec, Dušan, 1927-2001
Language
    anglicky
Source title - serial
    Věstník Českého geologického ústavu (Bulletin of the Czech Geological Survey)
Vol./nr.
    Vol. 71, no. 3
Pages
    p. 277-284
Year
    1996
Notes
    1 obr., 5 tab., 7 diagr., 32 bibl.
    České resumé
    Zkr. název ser.: Věst. Čes. geol. Úst. (Bull. Czech geol. Surv.)
Subject group
    analýza hornin
    chemické vlastnosti
    facie granulitová
    metabazit
    metamorfismus
    minerály
    moravské moldanubikum
Subject category
    náměšťský granulit
Geographical name
    ČR-Morava
    Náměšť nad Oslavou (Třebíč)
Keyword
    Complex
    Facies
    Granulite
    Metabasites
    Moravia
    Náměšť
    Western
Abstract (in english)
   The belt of the Náměšť felsic granulites, the West Moravian Moldanubicum, is rimmed along both sides by two stripes of amphibolites. Their contacts with granulites are bordered by contact zones in which the transition from the granulite facies rocks (felsic granulites) into rocks of the almandine-amphibolite facies (amphibolites) is realized. In them the following rock types can be found: Amphibole-pyroxene plagiogranulites, garnet pyribolites, pyroxene-garnet, and exceptionally clinohypersthene amphibolites. The zones originated in great part due to the equilibration of Pw at the granulite/amphibolite contacts during regional metamorphism. However, other limited metasomatic exchanges also took place at the contacts. Unusual feature of some contact basic rocks, specific for the Náměšť area, is the occurrence of clinohypersthene instead of hypersthene. Calcic pyroxene in the contact basic rocks is rich in Al2O3.
   A calcic pyroxene particularly rich in Al (of fassaitic type) is typical in those pyroxene plagiogranulites which contain abundant basic bytownite. This significantly enhanced the bulk Al content of the rock
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    21. 3. 2008
Import date
    8. 8. 2012