Record details

    Příspěvek k petrografii a mineralogii hlavních typů gabronoritických až kvarcdioritických plutonitů intruzívního shluku u Mladotic, západní Čechy
Statement of responsibility
    Ferry Fediuk, Eva Fediuková
Other titles
    Contribution to the petrography and mineralogy of main types of the gabbronoritic to quartz dioritic plutonites of the Mladotice intrusive cluster, W-Bohemia
    Fediuk, František, 1929-
    Fediuková, Eva
Source title - serial
    Č. 5
    s. 3-19
    3 obr., 7 tab., 11 bibl.
    Anglické resumé
    Zkr. název ser.: Erica
Subject group
    chemismus minerálů
    křemenný diorit
    minerály horninotvorné
    západočeský pluton
Geographical name
    Mladotice (Plzeň-sever)
Abstract (in english)
   The Mladotice intrusive cluster, consisting of several minor plugs, penetrates the Proterozoic volcanosedimentary complex of Western - Bohemia 65 km westward of Prague. Its general qualitative petrography has been known since more than 65 years but quantitative data on mineral as well as chemical composition were missing. The present paper brings up 8 modal and 8 chemical rock-analyses and a large set of microprobe data of olivine, orthopyroxene, clinopyroxene, several types of amphiboles, biotite, chlorite, ilmenite and plagioclase. The analyzed rock series comprises olivine gabbronorite, leucogabbronorite, uralitized gabbronorite, quartz bearing gabbrodiorite, quartz diorite and porphyric microgranodiorite. All rocks are subalcaline, mostly middle potassic, metaaluminous and calc-alkaline with partial overlaps to tholeiitic field. They form a continuous series.
   Olivine gabbronorite contains olivine Fo 58, orthopyroxene En 65 to 59, Ca, Mg rich augite, kaersutite, tschermakitic Mg-hornblende, actinolitic Mg-hornblende and actinolite, biotite, plagioclase An 66 to 52, ilmenite and pyrrhotine. The Mladotice intrusion had a high temperature character, its opx:cpx pairs equilibrated at approx. 1100°C
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
Entered date
    21. 3. 2008
Import date
    8. 8. 2012