Podrobnosti záznamu

Název
    Mn3+-rich andalusite to kanonaite and their breakdown products from metamanganolite at Kojetice near Třebíč, the Moldanubian Zone, Czech Republic
Další názvy
    Mn3+-rich andalusite to kanonaite and their breakdown products from metamanganolite at Kojetice near Třebíč, the Moldanubian Zone, Czech Republic
Autor
    Novák, Milan
    Škoda, Radek
Jazyk
    česky
Typ dokumentu
    článek v periodiku
Zdrojový dokument - seriál
    Journal of Geosciences
Svazek/č.
    Roč. 52, č. 1
Strany
    7
Rok
    2007
Výraz tezauru
    kanonaite
    Kojetice
    Mn3+-rich andalusite
    muscovite
    paragonite
    spessartine
Klíčové slovo
    Andalusite
    Breakdown
    Czech
    Kanonaite
    Kojetice
    Metamanganolite
    Mn3+-rich
    Moldanubian
    Near
    Products
    Republic
    Třebíč
    Zone
Abstrakt (česky)
   A zoned Mn3+-rich andalusite to kanonaite occurs as shortly prismatic, black-green crystals, up to 2 mm in size, randomly distributed in quartz matrix of quartzitic rock with metamanganolite portions from Kojetice near Třebíč. Minor spessartine, braunite, K-feldspar, albite, hyalophane, rare paragonite and accessory magnetite-rutile intergrowths, tephroite, chernovite-(Y), monazite-(Ce), pyrophanite, Sb-rich rutile, cobaltite, pseudobrookite(?) and pale pink flakes of late muscovite were identified in this rock. Zoned subhedral grains of Mn3+-rich andalusite to kanonaite have strong pleochroism: X = yellow, Y = green, Z = deep green, when narrow Mn3+-enriched rims feature slightly more intensive colors. Electron microprobe study shows that the core has always lower contents of Mn2O3 relative to commonly narrow rim of kanonaite. Chemical composition varies from Mn3+-rich andalusite with 0.21 apfu Mn3+ (9.72 wt. % Mn2O3) to kanonaite with up to 0.60 apfu Mn3+ (26.09 wt. % Mn2O3).
Abstrakt (anglicky)
   A zoned Mn3+-rich andalusite to kanonaite occurs as shortly prismatic, black-green crystals, up to 2 mm in size, randomly distributed in quartz matrix of quartzitic rock with metamanganolite portions from Kojetice near Třebíč. Minor spessartine, braunite, K-feldspar, albite, hyalophane, rare paragonite and accessory magnetite-rutile intergrowths, tephroite, chernovite-(Y), monazite-(Ce), pyrophanite, Sb-rich rutile, cobaltite, pseudobrookite(?) and pale pink flakes of late muscovite were identified in this rock. Zoned subhedral grains of Mn3+-rich andalusite to kanonaite have strong pleochroism: X = yellow, Y = green, Z = deep green, when narrow Mn3+-enriched rims feature slightly more intensive colors. Electron microprobe study shows that the core has always lower contents of Mn2O3 relative to commonly narrow rim of kanonaite. Chemical composition varies from Mn3+-rich andalusite with 0.21 apfu Mn3+ (9.72 wt. % Mn2O3) to kanonaite with up to 0.60 apfu Mn3+ (26.09 wt. % Mn2O3).
Přispěvatel
    MU Brno, Přírodovědecká fakulta
Kód přispěvatele
    MU, PřF
Zdrojový formát
    R
Datum importu
    8. 8. 2012