Record details

Title
    Scandian columbite and niobian rutile from pegmatites penetrating the Třebíč durbachite massif, western Moravia, Czech Republic
Statement of responsibility
    Milan Novák, František Čech
Other titles
    Skandiový columbit a niobový rutil z pegmatitů pronikajících třebíčským durbachitovým masívem, západní Morava
Author
    Čech, František
    Novák, Milan, 1952-
Language
    anglicky
Source title - serial
    Acta Musei Moraviae, Scientiae naturales (Časopis Moravského muzea, Vědy přírodní)
Vol./nr.
    Vol. 80, no. 1/2(1995)
Pages
    p. 3-8
Notes
    2 obr., 1 tab., 17 bibl.
    České resumé
Subject group
    kolumbit
    mineralogie topografická
    moldanubikum západní Moravy
    niob
    pegmatit
    rutil
    skandium
Geographical name
    Chlumek (Žďár nad Sázavou)
    ČR-Morava
    Kožichovice (Třebíč)
Keyword
    Columbite
    Czech
    Durbachite
    Massif
    Moravia
    Niobian
    Pegmatites
    Penetrating
    Republic
    Rutile
    Scandian
    Třebíč
    Western
Abstract (in english)
   Scandian columbite from Chlumek and niobian rutile from Kožichovice were studied using an electron microprobe. Columbite is characterized by low Ta/(Ta+Nb)=0.08-0.19 and moderate Mn/(Mn+Fe)=0.35-0.64 as well as increased TiO2, WO3 and particularly SC2O3 contents (up to 1.96 wt.). The substitution mechanism R3+R4+R2-1R5+-1 and R4+R6+R5+-2 are suggested for entry Sc, Ti and W into the columbite structure. The composition of niobian rutile indicates, that the substitution Fe3+R5+Ti4+-2 predominates over Fe2+R5+2Ti4+-3. Based on overall mineral paragenesis and chemical composition of Nb, Ta-oxide minerals, the Kožichovice pegmatite belongs to NYF-family pegmatites related to the Třebíč durbachite massif, whereas the Chlumek pegmatite corresponds to the barren LCT-family pegmatites in the Moldanubicum and it may be related to the Dolní Bory pegmatite district
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    16. 4. 2008
Import date
    8. 8. 2012