Podrobnosti záznamu

Název
    Tantalum mineralization in the apical part of the Cínovec (Zinnwald) granite stock
Údaj o odpovědnosti
    A.K. Rub, Miroslav Štemprok, M.G. Rub
Další názvy
    Tantalvererzung im oberen Teil des Cínovec (Zinnwalder) Granitstocks
Autor
    Rub, A. K.
    Rub, M. G.
    Štemprok, Miroslav
Jazyk
    anglicky
Zdrojový dokument - seriál
    Mineralogy and petrology
Svazek/č.
    Vol. 63, no. 3-4
Strany
    p. 199-222
Rok
    1998
Poznámky
    2 obr., 3 fot., 6 diagr., 5 tab., 2 s.bibl.
    Německé resumé
    Zkr. název ser.: Mineral. and Petrology
Předmětová skupina
    granit
    greizen
    kasiterit
    krušnohorský pluton
    niob
    peň
    profil vrtný
    rutil
    skupina columbitu
    suroviny Ta
    tantal
    uran
    vrt hluboký
Geografické jméno
    Cínovec (Teplice)
    ČR-Čechy
    Rusko-Sibiř
Klíčové slovo
    Apical
    Cínovec
    Granite
    Mineralization
    Stock
    Tantalum
    Zinnwald
Abstrakt (anglicky)
   Granite-hosted tantalum mineralization was studied in the apical part of the Cínovec (Zinnwald) granite stock (eastern Krušné hory, Czech Republic). Samples of granite and greizen from drill hole CS-1 (1596m deep), situated in the centre of the granite body were analysed chemically and examined by electron microprobe. The apical, mainly lepidolite granite with 24 to 212ppm Ta contain Ta-rich Mn columbite, uranmicrolite and strueverite (tantalian rutile). During gresenization the contents of Ta decreased or remained the same, but the newly formed cassiderite has elevated contents of Ta, probably due to remobilization from albitized granites. Niobium and tantalum mineralization can be linked with both magmatic and postmagmatic stages of granite evolution. Ta-rich columbite formed as a result of albitization dominant at the top of the granite cupola, whereas magmatic Nb-rich columbite is present throughout the entire profile of the granite stock.
   The Cínovec granite stock is similar to some palaeozoic Ta-bearing granite stocks in the Far East of Russia (Vosnesenka, Pogranichnyi) which are characterized by a vertical sequence of lepidolite, zinnwaldite and protolithionite granites. It shows minor similarities with Mesozoic amazonite-bearing granites in Transbaikalia (Etyka, Orlovka) and differs petrologically and mineralogically from the Palaeozoic lepidolite granite of Beauvoir (Échassieres) in France
Přispěvatel
    Česká geologická služba
Kód přispěvatele
    ČGS (UNM)
Zdrojový formát
    U
Datum vložení
    18. 2. 2008
Datum importu
    8. 8. 2012