Record details

Title
    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
Author
    Aftalion, Margaret
    Bowes, Donald R.
Language
    anglicky
Source title - serial
    Neues Jahrbuch für Mineralogie. Monatshefte
Vol./nr.
    H. 4
Year
    2002
Notes
    2 obr., 1 tab., 3 s. bibl.
    il.
    Zkr. název ser.: Neu. Jb. Mineral., Mh.
Subject group
    datování U/Pb
    devon-střední
    facie amfibolitová
    krystalinikum Českého masivu
    migmatitizace
    rula
    uplift
    vrásnění variské
    západosudetská oblast
    zirkon
Geographical name
    Česká republika
    Polsko - jihozápad
Keyword
    Bohemian
    Domain
    Evidence
    Formation
    Góry
    Isotopic
    Massif
    Mid-Devonian
    Migmatite
    Mountains
    Poland
    Sowie
    Sudeten
    SW
    U-Pb
    Zircon
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
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    11. 7. 2007
Import date
    8. 8. 2012