Record details

    U-Pb zircon isotopic evidence for mid-Devonian migmatite formation in the Góry Sowie domain of the Bohemian Massif, Sudeten Mountains, SW Poland
Statement of responsibility
    Margaret Aftalion, Donald R. Bowes
    Aftalion, Margaret
    Bowes, Donald R.
Source title - serial
    Neues Jahrbuch für Mineralogie. Monatshefte
    H. 4
    2 obr., 1 tab., 3 s. bibl.
    Zkr. název ser.: Neu. Jb. Mineral., Mh.
Subject group
    datování U/Pb
    facie amfibolitová
    krystalinikum Českého masivu
    vrásnění variské
    západosudetská oblast
Geographical name
    Česká republika
    Polsko - jihozápad
Abstract (in english)
   U-Pb isotopic data for 5 measured fractions of zircon from a homophonous granitoid-looking plagioclase-quartz-biotite diatexite in the Góry Sowie domain of SW Poland scatter about a projection of the chord (LI 369+-15Ma; UI 1750+-270 Ma) for a gneiss elsewhere in the domain and their distribution is consistent with an age of metamorphism-migmatization generally corresponding to c.380Ma concordant U-Pb monazite ages from the diatexite. A 0.65-1.2 Ga range of 207Pb/206Pb apparent ages is interpreted as the result of the presence of varying proportions and as supporting the derivation of the migmatite from a sedimentary protolith. The mid-Devonian episode of tectonothermal (and igneous) activity has coeval counterparts in some Czech and German domains of the Bohemian Massif and is significant in evolution of the Hercynian orogen. Arguments are presented againts previous interpretations of the metamorphism-migmatization having taken place in Ordovician times
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
Entered date
    11. 7. 2007
Import date
    8. 8. 2012