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Single zircon U–Pb ages and geochemistry of granitoid gneisses from SW Poland: evidence for an Avalonian affinity of the Brunian microcontinent


Seven granitoid gneisses from the contact zone between the eastern margin of the Variscan belt and the Brunian microcontinent in SW Poland have been dated by ion-microprobe and 207Pb/206Pb single zircon evaporation methods. The zircons define two age groups for the gneiss protoliths: (1) late Neoproterozoic c. 576–560 Ma and (2) early Palaeozoic c. 488–503 Ma granites. The granitoid gneisses belonging to the basement of the Brunian microcontinent contain abundant Mesoproterozoic to latest Palaeoproterozoic inherited material in the range of 1200–1750 Ma. The gneisses of the Variscan crustal domain lack Mesoproterozoic inherited zircon cores. Trace element geochemistry of Proterozoic gneisses reveals features resembling either volcanic arc or post-collisional granites. The studied rocks are geochemically similar to other Proterozoic orthogneisses derived from the basement of the Brunian microcontinent. Gneisses with early Palaeozoic protolith ages are geochemically comparable to granitoid gneisses widespread in the adjacent Sudetic part of the Bohemian Massif and are considered characteristic of peri-Gondwanan crust. Our data prove the dissimilarity between the Brunia plate and the westerly terranes of the Variscan belt. The occurrence of granitic gneisses with late Neoproterozoic protolith ages and widespread Mesoproterozoic inheritance in our dated samples support an East Avalonian affinity for the Brunian microcontinent. In contrast, the abundance of gneisses derived from an early Palaeozoic granitic protolith and devoid of Mesoproterozoic zircon cores supports the Armorican affinity of the Variscan domain bordering on the Brunia plate from the west. Structural evidence shows that the eastern segment of the Variscan belt is juxtaposed against the Brunian microcontinent along a N–S-trending tectonic contact, possibly equivalent to the Rheic suture.

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Aleksandrowski, P., Kryza, R., Mazur, S., Pin, C. & Zalasiewicz, J. A. 2000. The Polish Sudetes: Caledonian or Variscan? Transactions of the Royal Society of Edinburgh 90, 126–46.
Aleksandrowski, P. & Mazur, S. 2002. Collage tectonics in the northeasternmost part of the Variscan Belt: the Sudetes, Bohemian Massif. In Palaeozoic Amalgamation of Central Europe (eds Winchester, J., Pharaoh, T. & Verniers, J.), pp. 237–77. Geological Society of London, Special Publication no. 201.
Barbarin, B. 1999. A review of the relationships between granitoid types, their origins and their geodynamic environments. Lithos 46, 605–26.
Barker, F. 1979. Trondhjemites: definition, environment and hypothesis of origin. In Trondhjemites, Dacites and Related Rocks (ed. Barker, F.), pp. 112. Amsterdam: Elsevier.
Bederke, E. 1929. Die varistische Tektonik der mittleren Sudeten. Fortschritte der Geologie und Paläeontologie 23, 429524.
Bederke, E. 1935. Verbreitung und Gliederung des Devons in den Ostsudeten. Zentralblatt für Mineralogie, Geologie und Paläontologie Abteilung B, 33–40.
Belka, Z., Ahrendt, H., Franke, W. & Wemmer, K. 2000. The Baltica–Gondwana suture in central Europe: evidence from K–Ar ages of detrital muscovites and biogeographical data. In Orogenic Processes: Quantification and Modelling in the Variscan Belt (eds Franke, W., Haak, V., Oncken, O. & Tanner, D.), pp. 87102. Geological Society of London, Special Publication no. 179.
Black, L. P., Kamo, S. L., Allen, C. M., Aleinikoff, J. N., Davis, D. W., Korsch, R. J. & Foudoulis, C. 2003. TEMORA 1: a new zircon standard for U–Pb geochronology. Chemical Geology 200, 155–70.
Bröcker, M., Klemd, R., Cosca, M., Brock, W., Larionov, A. N. & Rodionov, N. 2009. The timing of eclogite-facies metamorphism and migmatization in the Orlica–Śnieżnik complex, Bohemian Massif: constraints from a geochronological multimethod study. Journal of Metamorphic Geology 27, 385403.
Cháb, J., Mixa, P., Vanecek, M. & Žáček, V. 1994. Geology of the NW part of the Hrubý Jesenik Mts. (the Bohemian massif, Central Europe). Věstník Českého geologického ústavu 69 (3), 1726.
Cymerman, Z. & Jerzmański, J. 1987. The metamorphic complex in the eastern part of the Fore-Sudetic block at Niedźwiedź, near to Ziębice. Kwartalnik Geologiczny 31, 239–62 (in Polish).
Don, J., Dumicz, M., Wojciechowska, I. & Żelaźniewicz, A. 1990. Lithology and tectonics of the Orlica–Śnieżnik Dome, Sudetes – recent state of knowledge. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen 179, 159–88.
Dudek, A. 1980. The crystalline basement block of the Outer Carpathians in Moravia: Bruno-Vistulicum. Rozpravy České Akademie Věd 90, 185.
Finger, F., Hanžl, P., Pin, C., Von Quadt, A. & Steyrer, H. P. 2000. The Brunovistulian: Avalonian Precambrian sequence at the eastern end of the Central European Variscides? In Orogenic Processes: Quantification and Modelling in the Variscan Belt (eds Franke, W., Haak, V., Oncken, O. & Tanner, D.), pp. 103–12. Geological Society of London, Special Publication no. 179.
Fischer, G. 1936. Der Bau des Glatzer Schneegebirges. Jahrbuch der Preussischen Geologischen Landesanstalt 56, 712–32.
Friedl, G., Finger, F., McNaughton, N. J. & Fletcher, I. R. 2000. Deducing the ancestry of terranes: SHRIMP evidence for South America-derived Gondwana fragments in central Europe. Geology 28, 1035–8.
Fritz, H. & Neubauer, F. 1993. Kinematics of crustal stacking and dispersion in the south-eastern Bohemian Massif. Geologische Rundschau 82, 556–65.
Hanžl, P. & Melichar, R. 1997. The Brno massif: a section through the active continental margin or a composed terrane? Krystalinikum 23, 3358.
Kalvoda, J., Melichar, R., Bábek, O. & Leichmann, J. 2002. Late Proterozoic-Paleozoic tectonostratigraphic development and paleogeography of Brunovistulian terrane and comparison with other terranes at the SE margin of Baltica–Laurussia. Journal of the Czech Geological Society 47 (3), 81102.
Keppie, J. D., Davis, D. W. & Krogh, T. E. 1998. U–Pb geochronological constraints on Precambrian stratified units in the Avalon Composite Terrane of Nova Scotia, Canada: tectonic implications. Canadian Journal of Earth Sciences 35, 222–36.
Klimas, K. 2008. Geochronology and petrogenetic study of zircons from selected crystalline rocks of the eastern Fore-Sudetic block. ARGI. Wrocław, 194 pp.
Kober, B. 1987. Single-zircon evaporation combined with Pb+ emitter-bedding for 207Pb/206Pb-age investigations using thermal ion mass spectrometry, and implications to zirconology. Contribution to Mineralogy and Petrology 96, 6371.
Kröner, A., Byerly, G. R. & Lowe, D. R. 1991. Chronology of early Archaean granite-greenstone evolution in the Barberton Mountain Land, South Africa, based on precise dating by single zircon evaporation. Earth and Planetary Science Letters 103, 4154.
Kröner, A. & Hegner, E. 1998. Geochemistry, single zircon ages and Sm–Nd systematics of granitoid rocks from the Góry Sowie (Owl Mts, Polish West Sudetes): evidence for early Palaeozoic arc-related plutonism. Journal of the Geological Society, London 155, 711–24.
Kröner, A., Jaeckel, P., Hegner, E. & Opletal, M. 2001. Single zircon ages and whole-rock Nd isotopic systematics of early Palaeozoic granitoid gneisses from the Czech and Polish Sudetes (Jizerské hory, Krkonoše and Orlice–Snéžník Complex). International Journal of Earth Sciences (Geologische Rundschau) 90, 304–24.
Kröner, A., Štípská, P., Schulmann, K. & Jaeckel, P. 2000. Chronological constraints on the pre-Variscan evolution of the northeastern margin of the Bohemian Massif, Czech Republic. In Orogenic Processes: Quantification and Modelling in the Variscan Belt (eds Franke, W., Haak, V., Oncken, O. & Tanner, D.), pp. 175–97. Geological Society of London, Special Publication no. 179.
Kröner, A., Wilde, S. A., O'Brien, P. J., Li, J. H., Passchier, C. W., Walte, N. P. & Liu, D. Y. 2005. Field relationships, geochemistry, zircon ages and evolution of a late Archaean to Palaeoproterozoic lower crustal section in the Hengshan Terrain of northern China. Acta Geologia Sinica 79, 605–29.
Lange, U., Bröcker, M., Armstrong, R., Żelaźniewicz, A., Trapp, E. & Mezger, K. 2005. The orthogneisses of the Orlica–Śnieźnik complex (West Sudetes, Poland): geochemical characteristics, the importance of pre-Variscan migmatization and constraints on the cooling history. Journal of the Geological Society, London 162, 973–84.
Lange, U., Bröcker, M., Mezger, K. & Don, J. 2002. Geochemistry and Rb–Sr geochronology of a ductile shear zone in the Orlica–Śnieźnik dome (West Sudetes, Poland). International Journal of Earth Sciences 91, 1005–16.
Ludwig, K. R. 1999. User's manual for Isoplot/Ex, Version 2.10. A geochronological toolkit for Microsoft Excel. Berkeley Geochronology Center Special Publication No. 1a. Berkeley, CA.
Ludwig, K. R. 2000. SQUID 1.00, A User's Manual. Berkeley Geochronology Center Special Publication No. 2. Berkeley, CA.
Maniar, P. D. & Piccoli, P. M. 1989. Tectonic discrimination of granitoids. Geological Society of America Bulletin 101, 635–43.
Matte, Ph., Maluski, H., Rajlich, P. & Franke, W. 1990. Terrane boundaries in the Bohemian Massif: results of large-scale Variscan shearing. Tectonophysics 177, 151–70.
Mazur, S. & Józefiak, D. 1999. Structural record of Variscan thrusting and subsequent extensional collapse in the mica schists from vicinities of Kamieniec Ząbkowicki, Sudetic foreland, SW Poland. Annales Societatis Geologorum Poloniae 69, 126.
Mazur, S., Puziewicz, J. & Józefiak, D. 1995. The Niemcza Zone – a regional-scale shear zone between two areas of contrasting tectono-metamorphic evolution. In Guidebook of LXVI Meeting of the Polish Geological Society, pp. 221–40. Wrocław: Polish Geological Society (in Polish, English summary).
Moczydłowska, M. 1997. Proterozoic and Cambrian successions in Upper Silesia: an Avalonian terrane in southern Poland. Geological Magazine 134, 679–89.
Murphy, J. B., Pisarevsky, S. A., Nance, R. D. & Keppie, J. D. 2004. Neoproterozoic–Early Palaeozoic evolution of peri-Gondwanan terranes: implications for Laurentia–Gondwana connections. International Journal of Earth Sciences 93, 659–82.
Nakamura, N. 1974. Determination of REE, Ba, Fe, Mg, Na and K in carbonaceous and ordinary chondrites. Geochimica et Cosmochimica Acta 38, 757–75.
Nance, R. D. & Murphy, J. B. 1996. Basement isotopic signatures and Neoproterozoic paleogeography of Avalonian–Cadomian and related terranes in the circum-North Atlantic. In Avalonian and Related Peri-Gondwanan Terranes of the Circum-North Atlantic (eds Nance, R. D. & Thompson, M. D.), pp. 333–46. Geological Society of America, Special Paper no. 304.
Nance, R. D., Murphy, J. B., Strachan, R. A., Keppie, J. D., Gutierrez-Alonso, G., Fernandez-Suarez, J., Quesada, C., Linnemann, U., D'Lemos, R. & Pisarevsky, S. A. 2008. Neoproterozoic–early Palaeozoic tectonostratigraphy and palaeo-geography of the peri-Gondwanan terranes: Amazonian v. West African connections. In The Boundaries of the West African Craton (eds Nasser, E. & Liégeois, J. P.), pp. 345–83. Geological Society of London, Special Publication no. 297.
Nawrocki, J., Żylińska, A., Buła, Z., Grabowski, J., Krzywiec, P. & Poprawa, P. 2004. Early Cambrian location and affinities of the Brunovistulian terrane (Central Europe) in the light of palaeomagnetic data. Journal of the Geological Society, London 161, 513–22.
Oberc, J. 1966. Geology of crystalline rocks of the Wzgórza Strzelińskie Hills, Lower Silesia. Studia Geologica Polonica 20, 9187 (in Polish, English summary).
Oberc, J. 1968. The boundary between the western and eastern Sudetic tectonic structure. Annales Societatis Geologorum Poloniae 38 (2/3), 203–17 (in Polish, English summary).
Oberc-Dziedzic, T., Klimas, K., Kryza, R. & Fanning, C. M. 2003. SHRIMP zircon geochronology of the Strzelin gneiss, SW Poland: evidence for a Neoproterozoic thermal event in the Fore-Sudetic Block, Central European Variscides. International Journal of Earth Sciences 92, 701–11.
Oberc-Dziedzic, T., Kryza, R., Klimas, K., Fanning, M. C. & Madej, S. 2005. Gneiss protolith ages and tectonic boundaries in the NE part of the Bohemian Massif (Fore-Sudetic Block, SW Poland). Geological Quarterly 49 (4), 363–78.
Oberc-Dziedzic, T. & Madej, S. 2002. The Variscan overthrust of the Lower Palaeozoic gneiss unit on the Cadomian basement in the Strzelin and Lipowe Hills massifs, Fore-Sudetic Block, SW Poland; is this part of the East-West Sudetes boundary? Geologia Sudetica 34, 3958.
Oberc-Dziedzic, T., Pin, C. & Kryza, R. 2005. Early Palaeozoic crustal melting in an extensional setting: petrological and Sm–Nd evidence from the Izera granite-gneisses, Polish Sudetes. International Journal of Earth Sciences 94 (3), 354–68.
Oliver, G. J. H., Corfu, F. & Krogh, T. E. 1993. U–Pb ages from SW Poland: evidence for a Caledonian suture zone between Baltica and Gondwana. Journal of the Geological Society, London 150, 355–69.
Parry, M., Štípská, P., Schulmann, K., Hrouda, F., Ježek, J. & Kröner, A. 1997. Tonalite sill emplacement at an oblique plate boundary: northeastern margin of the Bohemian Massif. Tectonophysics 280, 6181.
Pearce, J. A. 1996. Sources and settings of granitic rocks. Episodes 19, 120–5.
Pearce, J. A., Harris, N. B. W. & Tindle, A. G. 1984. Trace element discrimination diagrams for the tectonic interpretation of granitic rocks. Journal of Petrology 25, 956–83.
Pharaoh, T. C. 1999. Palaeozoic terranes and their lithospheric boundaries within the Trans-European Suture Zone (TESZ): a review. Tectonophysics 314, 1741.
Pollock, J. C., Hibbard, J. P. & Sylvester, P. J. 2009. Early Ordovician rifting of Avalonia and birth of the Rheic Ocean: U–Pb detrital zircon constraints from Newfoundland. Journal of the Geological Society, London 166, 501–15.
Priem, H. N. A., Kroonenberg, S. B., Beolrijk, N. A. I. M. & Hebeda, E. H. 1989. Rb–Sr and K–Ar evidence of a 1.6 Ga basement underlying the 1.2 Ga Garzón-Santa Marta granulite belt in the Colombian Andes. Precambrian Research 42, 315–24.
Prigmore, J. K., Butler, A. J. & Woodcock, N. H. 1997. Rifting during separation of Eastern Avalonia from Gondwana: Evidence from subsidence analysis. Geology 25, 203–6.
Puziewicz, J. & Rudolf, N. 1998. Petrology and origin of the leucocratic two-mica gneisses from the Doboszowice metamorphic unit. Archiwum Mineralogiczne 51 (1–2), 181212 (in Polish, English summary).
Restrepo-Pace, P. A., Ruiz, J., Gehrels, G. E. & Cosca, M. 1997. Geochronology and Nd isotopic data of Grenville-age rocks in the Colombian Andes: new constraints for Late Proterozoic–Early Paleozoic paleocontinental reconstructions of the Americas. Earth and Planetary Science Letters 150, 427–41.
Ruiz, J., Tosdal, R. M., Restrepo, P. A. & Murrillo-Muneton, G. 1999. Pb isotope evidence for Colombia-southern Mexico connections in the Proterozoic. In Laurentia-Gondwana connections before Pangea (eds Ramos, V. A. & Keppie, J. D.), pp. 183–98. Geological Society of America, Special Paper no. 336.
Schulmann, K. & Gayer, R. 2000. A model for a continental accretionary wedge developed by oblique collision: the NE Bohemian Massif. Journal of the Geological Society, London 157, 401–16.
Schulmann, K., Ledru, P., Autran, A., Melka, R., Lardeaux, J. M., Urban, M. & Lobkowicz, M. 1991. Evolution of nappes in the eastern margin of the Bohemian Massif: A kinematic interpretation. Geologische Rundschau 80, 7392.
Skácel, J. 1989. Intersection of the Lugian boundary fault and the Nyznerov dislocation zone between Vapienna and Javornik in Silesia (Czech Republic). Acta Universitatis Palackianae, Olomoucensis 95, Geographica-Geologica 27, 3145 (in Czech, English summary).
Souček, J., Jelínek, E. & Bowes, D. R. 1992. Geochemistry of gneisses of the Eastern margin of the Bohemian massif. In Proceedings of the 1st International Conference on the Bohemian Massif (ed. Kukal, Z.), pp. 269–85. Prague.
Stacey, J. S. & Kramers, J. D. 1975. Approximation of terrestrial lead isotope evolution by a two-stage model. Earth and Planetary Science Letters 26, 207–21.
Štípská, P., Schulmann, K. & Kröner, A. 2004. Vertical extrusion and middle crustal spreading of omphacite granulite: a model of syn-convergent exhumation (Bohemian Massif, Czech Republic). Journal of Metamorphic Geology 22, 179–98.
Štípská, P., Schulmann, K., Thompson, A. B., Ježek, J. & Kröner, A. 2001. Thermo-mechanical role of a Cambro-Ordovician paleorift during the Variscan collision: the NE margin of the Bohemian Massif. Tectonophysics 332, 239–53.
Suess, F. E. 1912. Die moravischen Fenster und ihre Beziehung zum Grundgebirge des Hohes Gesenkes. Denkschrifte der österreichischen Akademie der Wissenschaften, Math.-nat. Kl. 78, 541631.
Sun, S. S. & McDonough, W. F. 1989. Chemical and isotopic systematic of oceanic of oceanic basalts: implications for mantle composition and processes. In Magmatism in oceanic basins (eds Saunders, A. D. & Norry, M. J.), pp. 313–45. Geological Society of London, Special Publication no. 42.
Szczepański, J. & Oberc-Dziedzic, T. 1998. Geochemistry of amphibolites from the Strzelin crystalline massif, Fore-Sudetic Block, SW Poland. Neues Jahrbuch für Mineralogie, Abhandlungen 173, 2340.
Turniak, K., Mazur, S. & Wysoczanski, R. 2000. SHRIMP zircon geochronology and geochemistry of the Orlica–Śnieżnik gneisses (Variscan belt of Central Europe) and their tectonic implications. Geodinamica Acta 13, 293312.
van Breemen, O., Aftalion, M., Bowes, D. R., Dudek, A., Misař, Z., Povondra, P. & Vrana, S. 1982. Geochronological studies of the Bohemian massif, Czechoslovakia, and their significance in the evolution of Central Europe. Transaction of the Royal Society of Edinburgh, Earth Sciences 73, 89108.
Wetherill, G. W. 1956. Discordant uranium-lead ages. Transactions of American Geophysical Union 37, 320–6.
Wiedenbeck, M., Allé, P., Corfu, F., Griffin, W. L., Meier, M., Oberli, F., von Quadt, A., Roddick, J. C. & Spiegel, W. 1995. Three natural zircon standards for U–Th–Pb, Lu–Hf, trace element and REE analyses. Geostandards Newsletter 19, 123.
Williams, I. S. 1998. U–Th–Pb Geochronology by Ion Microprobe. In Applications of microanalytical techniques to understanding mineralizing processes (eds McKibben, M. A., Shanks III, W. C. & Ridley, W. I.), pp. 135. Reviews in Economic Geology 7.
Winchester, J. A. & Floyd, P. A. 1977. Geochemical discrimination of different magma series and their differentiation products using immobile elements. Chemical Geology 20, 325–43.
Winchester, J. A. & PACE TMR Network Team. 2002. Palaeozoic amalgamation of Central Europe: new results from recent geological and geophysical investigations. Tectonophysics 360, 521.
Zapletal, K. 1932. Location of the Moravo-Silesian region in Variscides and Alpides. In Sborník Přírodovědecké spolecnosti v Moravské Ostrave 1930–1931, pp. 257–92. Moravskoslezská knihtiskárna v Moravské Ostrave (in Czech).
Żelaźniewicz, A., Buła, Z., Fanning, M., Seghedi, A. & Żaba, J. 2009. More evidence on Neoproterozoic terranes in Southern Poland and southeastern Romania. Geological Quarterly 53, 93124.
Żelaźniewicz, A., Nowak, I., Larionov, A. N. & Presnyakov, S. 2006. Syntectonic lower Ordovician migmatite and post-tectonic Upper Viséan syenite in the western limb of the Orlica–Śnieżnik Dome, West Sudetes: U–Pb SHRIMP data from zircons. Geologia Sudetica 38, 6380.
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