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U-Pb zircon and Sm-Nd model ages of high-grade Moldanubian metasediments, Bohemian Massif, Czechoslovakia

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Abstract

We report single grain U-Pb ion-microprobe as well as conventional bulk size fraction ages for zircons from 3 metasediment samples of the Moldanubian Complex, Bohemian Massif, one of the largest crystalline complexes of the Hercynian foldbelt in Europe. These are complemented by whole-rock Sm-Nd model ages. The metasediments are of upper amphibolite to granulite grade and come from the Bory Massif in Moravia, NW of Brno (sample AA-1) and from the Varied Group (AA-2) and Monotonous Group (AA-3) in the Ceske Budejovice region of SW Bohemia.

Ion-microprobe data for detrital zircons yielded 207Pb/ 206Pb ages between ca. 1750 Ma and 2680 Ma and reflect chronologically heterogeneous source terrains. One grain in sample AA-1 of the Bory granulite massif may be as old as 2684±14 Ma, and this constitutes the oldest reported zircon age for the Hercynian belt of central Europe. The single grain data are much less discordant than previously published conventional U-Pb analyses from bulk zircon samples and suggest a significant early Proterozoic crust-formation event between 2 and 2.2 Ga ago. The size fraction data are compatible with the single grain ages and give a fairly precise definition of the Hercynian event between 347 and 367 Ma ago while their upper Concordia intercept ages between ≈1700 and ≈2050 Ma represent the mean of the respective grain populations and are probably geohronologically meaningless. The Nd whole-rock model ages between 1.7 and 3.0 Ga confirm mid-Proterozoic to Archaean source terrains for the dated metasediments.

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References

  • Arnold A, Scharbert HG (1973) Rb-Sr-Altersbestimmungen an Granuliten der südlichen Böhmischen Masse in Österreich. Schweiz Mineral Petrog Mitt 53:61–78

    Google Scholar 

  • Cizek J, Kribek B, Buzek F, Hladikova J, Smejkal V (1984) Isotopic composition of carbonates in graphite deposits in the Krumlov group, Moldanubian, Bohemian Massif. In Correlation of Proterozoic and Palaeozoic stratiform deposits. Fac Nat Sci Charles Univ Prague 7:103–122

    Google Scholar 

  • Choubert G, Faure-Muret A (1980) The Precambrian in north Peri-Atlantic and south Mediterranean mobile zones: General results. Earth Sci Rev 16:85–219

    Google Scholar 

  • Compston W, Williams IS, Meyer C (1984) U-Pb geochronology of zircons from Lunar Breccia 73217 using a sensitive high mass resolution ion microprobe. J Geophys Res 89 Suppl:B525-B534

    Google Scholar 

  • Compston W, Kröner A (1988) Multiple zircon growth within early Archaean tonalitic gneiss from the Ancient Gneiss Complex, Swaziland. Earth Planet Sci Lett 87:13–28

    Google Scholar 

  • Cumming GL, Richards JR (1975) Ore lead isotopic ratios in a continuously changing earth. Earth Planet Sci Lett 28:155–171

    Google Scholar 

  • Dvorák J (1985) Horizontal movements on deep faults in the Proterozoic basement of Moravia (Czechoslovakia). Jb Geol Bundesanstalt 127:551–556

    Google Scholar 

  • Fiala J, Zeman J, Sobotková O (1982) Tektonischer Bau des Zentralteiles des Moldanubikums. Krystalinikum 16:7–20

    Google Scholar 

  • Fiala J, Matejovská O, Vanková V (1987) Moldanubian granulites and related rocks: Petrology, geochemistry and radioactivity. Rozpravy Cesk Akad Ved 97, 102 p

  • Gebauer D (1986) The development of the continental crust of the European Hercynides since the Archean based on radiometric data. In: R Freeman, St Mueller, P Giese (eds) Proceedings of the third workshop on the European Geotraverse (EGT) Project — The central segment. European Science Foundation, Strasbourg 15–23

  • Gebauer D, Grünenfelder M (1973) Vergleichende U/Pb und Rb/ Sr-Altersbestimmungen im bayerischen Teil des Moldanubikums (abstract). Fortschr Mineral 50, Beih 3, 4

  • Grauert B, Hänny R, Soptrajanova G (1973) Age and origin of detrital zircons from the pre-Permian basements of the Bohemian Massif and the Alps. Contrib Mineral Petrol 40:105–130

    Google Scholar 

  • Grauert B, Hänny R, Soptrajanova G (1974) Geochronology of a polymetamorphic and anatectic gneiss region: The Moldanubicum of the area Lam-Deggendorf, eastern Bavaria, Germany. Contrib Mineral Petrol 45:37–63

    Google Scholar 

  • Jencek V, Vajner V (1968) Stratigraphy and relations of the groups in the Bohemian part of the Moldanubikum. Krystalinikum 6:105–124

    Google Scholar 

  • Kinny PD, Williams IS, Froude DO, Ireland TR, Compston W (1987) Early Archaean zircon ages from orthogneisses and anorthosites at Mount Narryer, Western Australia. Precambrian Res (in press)

  • Kober B, Lippold JH (1985) Plumbotectonics of central and western Europe. Terra Cognita 5:278

    Google Scholar 

  • Kröner A, Greiling R, Reischmann T, Hussein IM, Stern RJ, Dürr S, Krüger J, Zimmer M (1987) Pan-African crustal evolution in the Nubian segment of northeast Africa. Am Geophys Union, Geodynamics Series 17:235–257

    Google Scholar 

  • Kröner A, Compston W (1988) Ion microprobe zircon ages for early Archaean granite pebbles and greywacke, Barberton greenstone belt, southern Africa. Precambrian Res 38:367–380

    Google Scholar 

  • Liew TC, Hofmann AW (1988) Precambrian crustal components, plutonic associations, plate environment of the Hercynian fold belt of central Europe: indications from a Nd and Sr isotopic study. Contrib Mineral Petrol 98:129–138

    Google Scholar 

  • Pacltovä B (1986) Palynology of metamorphic rocks (methodological study). Rev Palaeobot Palynol 48:347–356

    Google Scholar 

  • Rajlich P, Synek J (1984) Polyphase deformation of the Varied Group of the Moldanubicum between Susice and Horazdovice, SW Bohemia. Bull Geol Surv Prague 59:56–76

    Google Scholar 

  • Rajlich P, Synek J, Sarbach M, Schulmann K (1986) Hercynianthrust related shear zones and deformation of the Varied Group on the contact of granulites/southern Moldanubian, Bohemian Massif. Geol Rundschau 75:665–683

    Google Scholar 

  • Richard P, Shimizu N, Allègre CJ (1976) 143Nd/146Nd, a natural tracer: an application to oceanic basalts. Earth Planet Sci Lett 31:269–278

    Google Scholar 

  • Ripperdan RL, Kirschvink JL (1987) A Silurian-Devonian paleopole from the Bohemian Massif, Czechoslovakia. EOS Trans Am Geophys Union 67:926

    Google Scholar 

  • Salop AJ (1977) Precambrian of the northern hemisphere. Elsevier, Amsterdam, 378 p

    Google Scholar 

  • Schenk V, Todt W (1983) U-Pb Datierungen an Zirkon und Monazit der Granulite im Moldanubikum Niederösterreichs (Waldviertel) (abstract). Fortschr Mineral Beih 61:190–191

    Google Scholar 

  • Schulz-Schmalschläger M, Propach G, Baumann A (1984) U/PbUntersuchungen an Zirkonen und Monazziten von Gesteinen des Vorderen Bayerischen Waldes (abstract). Fortschr Mineral Beih 62:223–224

    Google Scholar 

  • Stankova J (1982) “Dist-sillimanite”: its importance for assessment of polyphase metamorphism in the leptynite body near Bory, Czechoslovakia. Krystalinikum 16:53–66

    Google Scholar 

  • Svoboda J (1966) Regional geology of Czechoslovakia, part I The Bohemian Massif. Geol Survey of Czechoslovakia, Publ House of Czechoslowak Acad Sci, Prague, 668 p

    Google Scholar 

  • Suk M, Blizkovsky M, Buday T, Chlupac I, Cicha I, Dudek A, Dvorak J, Elias M, Holub V, Ibrmajer J, Kodym O, Kukal Z, Malkovsky M, Mencik E, Müller V, Tyracek J, Vejnar Z, Zeman A (1984) Geological history of the territory of the Czech Socialist Republic. Geol Survey, Praque, 396 p

    Google Scholar 

  • Teufel St, Ahrendt H, Hansen BT (1985) U-Pb und Rb-Sr-Altersbestimmungen im Übergangsbereich Moldanubikum/Saxothuringikum, NE-Bayern (abstract). Fortschr Mineral Beih 63:234

    Google Scholar 

  • Tilton GR (1960) Volume diffusion as a mechanism for discordant lead ages. J Geophys Res 65:2933–2945

    Google Scholar 

  • Van Breemen O, Aftalion M, Bowes DR, Dudek A, Misar Z, Povondra P, Vrana S (1982) Geochronological studies of the Bohemian Massif, Czechoslovakia, and their significance in the evolution of central Europe. Trans Roy Soc Edinburgh 75:89–108

    Google Scholar 

  • Vejnar Z (1971) Grundfragen des Moldanubikums und seine Stellung in der Böhmischen Masse. Geol Rundschau 60:1455–1465

    Google Scholar 

  • Vrána S (1979) Polyphase shear folding and thrusting in the Moldanubicum of South Bohemia. Bull Geol Surv Prague 54:75–86

    Google Scholar 

  • Williams IS, Compston W, Black LP, Ireland TR, Foster JJ (1984) Unsupported radiogenic lead in zircon: a cause of anomalously high Pb-Pb, U-Pb and Th-Pb ages. Contrib Mineral Petrol 88:322–327

    Google Scholar 

  • Williams IS, Claesson S (1987) Isotopic evidence for the Precambrian provenance and Caledonian metamorphism of high grade paragneisses from the Seve Nappes, Scandinavian Caledonides II. Ion microprobe zircon U-Th-Pb. Contrib Mineral Petrol 97:205–217

    Google Scholar 

  • York D (1969) Least-squares fitting of a straight line with correlated errors. Earth Planet Sci Lett 5:320–324

    Google Scholar 

  • Ziegler PA (1983) Caledonian and Hercynian crustal consolidation of the European alpine foreland. Terra Cognita 4:51–58

    Google Scholar 

  • Zoubek V (1969) Age relations in metamorphic terrains of the Bohemian Massif: Some methods and results. Geol Ass Canada Spec Paper 5:73–81

    Google Scholar 

  • Zoubek V (1974) Remarques sur le Précambrien des zones mobiles de l'Europe centrale et occidentale. In: Précambrian des zones mobiles le l'Europe. Conf Liblice, Academia Praha, 33–62

    Google Scholar 

Download references

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Authors and Affiliations

  1. Institut für Geowissenschaften, Universität Mainz, Postfach 3980, D-6500, Mainz, Federal Republic of Germany

    A. Kröner

  2. Max-Planck-Institut für Chemie, Postfach 3060, D-6500, Mainz, Federal Republic of Germany

    I. Wendt, T. C. Liew & W. Todt

  3. Research School of Earth Sciences, Australian National University, G.P.O. Box 4, 2601, Canberra, ACT, Australia

    W. Compston

  4. Institute of Geology and Geotechnics, Czechoslovak Academy of Sciences, V Holesovickách 41, 18209, Praha 8, CSSR

    J. Fiala

  5. Geophysical Institute, Czechoslovak Academy of Sciences, Bocni II, 14131, Praha 4, CSSR

    V. Vankova & J. Vanek

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  1. A. Kröner
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  2. I. Wendt
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  3. T. C. Liew
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  4. W. Compston
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  6. J. Fiala
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  7. V. Vankova
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Kröner, A., Wendt, I., Liew, T.C. et al. U-Pb zircon and Sm-Nd model ages of high-grade Moldanubian metasediments, Bohemian Massif, Czechoslovakia. Contr. Mineral. and Petrol. 99, 257–266 (1988). https://doi.org/10.1007/BF00371466

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