Podrobnosti záznamu

Název
    Cyrkon jako wskaznik genezy lupków z Czarnowa we wschodniej okrywie granitu Karkonoszy
Údaj o odpovědnosti
    Mentor Murtezi, Ryszard Kryza
Další názvy
    Zircon as petrogenetic indicator in the Czarnów schists, East Karkonosze Complex, SW Poland
Autor
    Kryza, Ryszard
    Murtezi, Mentor
Jazyk
    polsky
Zdrojový dokument - seriál
    Przeglad geologiczny
Svazek/č.
    Roč. 49, č. 9
Strany
    s. 815-819
Rok
    2001
Poznámky
    4 obr., 3 tab., 7 bibl.
    Anglické resumé
    il.
    Zkr. název ser.: Przegl. geol.
Předmětová skupina
    chemismus minerálů
    hafnium
    krkonošsko-jizerské krystalinikum
    leptynit
    morfologie krystalu
    petrogeneze
    svor
    zirkon
Geografické jméno
    Czarnów (Polsko-jihozápad)
    Polsko - jihozápad
Klíčové slovo
    Cyrkon
    Czarnowa
    Genezy
    Granitu
    Jako
    Karkonoszy
    Lupków
    Okrywie
    Wschodniej
    Wskaznik
Abstrakt (anglicky)
   The quartzo-feldspathic rocks (so-called "leptynites") and mica schists of the Czarnów unit in the eastern Karkonosze Complex (West Sudetes) exhibit problematic origin and age. They may represent felsic metavolcanic and metasediments of Neoproterozoic (?) age and form apparent the country rocks of the Kowary orthogneiss that intruded at ca. 500 Ma age. To highlight the problematic origin of the Czarnów schists, zircons from a set of representive samples of these rocks were studied. this study included description of morphological features, Pupin's typological classification and electron-microprobe analyses. Zircon concentrates from 5 different rocks samples were first studied using a typology method. Three samples come from fine-grained quartzo-feldspatic schists from the northern part of the Czarnów unit, whereas two samples from coarser-grained and darker mica schists in the southern part of the area.
   All the studied samples reveal zircon populations with many similarities in morphology. However, considerable different are ascetained in typological analysis: samples from the quartzo-feldspatic schists have types with dominating {100} prism and {101} pyramide (types S24, S23, S19 and S18), whereas in those from the mica shcists forms {110} and {211} prevail. this typological variation corresponds to differences observed in chemical characteristics of the zircons: the studied grains from the mica schists display higher Hf contents, usually with rims richer in Hf
Přispěvatel
    Česká geologická služba
Kód přispěvatele
    ČGS (UNM)
Zdrojový formát
    U
Datum vložení
    14. 8. 2007
Datum importu
    8. 8. 2012