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  • 1 Department of Petrology and Geochemistry, Eötvös Loránd University H-1117 Budapest, Pázmány P. sétány 1/c, Hungary
  • 2 Department of Petrology and Geochemistry, Eötvös Loránd University H-1117 Budapest, Pázmány P. sétány 1/c, Hungary
  • 3 Department of Earth and Environmental Sciences, University of Veszprém H-8201 Veszprém, Egyetem u. 10, Hungary
  • 4 Mecsek Ore Environment Company H-7633 Pécs, Esztergár L. út 19, Hungary
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In this paper, results of a bulk-rock geochemical study of silty and albitic claystone samples selected from the Upper Permian Boda Siltstone Formation (BSF) in the western part of the Mecsek Mountains (Tisza Mega-unit, Hungary) are presented. The high Na2O and P2O5 contents, relative to the post-Archean Australian average shale (PAAS) and the average Russian Paleozoic shale compositions, are the most striking features of the geochemistry of the Boda sediments. The samples studied are depleted in SiO2, TiO2 and Al2O3, and they are enriched in Fe2O3, MgO, CaO and K2O relative to the PAAS. The major element relations clearly show that the geochemistry of the BSF is strongly affected by post-depositional modification, corresponding to large-scale dispersal or addition of components. On the other hand, relatively high La content, low concentrations of V, Cr, Cu and Ni, and the result of the TiO2 versus Ni plot reflect a relatively felsic provenance of the BSF. By comparison with detrital mineralogy of the heteropic Cserdi alluvial fan system deposits, the authors assume that the Boda playa lake deposits had a similar immature primary composition consisting of quartz, plagioclase, K-feldspar, muscovite, biotite, chlorite and clay minerals. During weathering and transport in a semi-arid to arid climate, detrital mafic minerals were altered to yield chlorite and clay minerals plus Fe and Mg, and trace metals in solution. Mg was built into the structure of chlorite and of secondary carbonates such as dolomite and Mg-rich calcite. Based on previous geochemical studies, the BSF contains particularly sodic sedimentary rocks (up to 8 wt%) which may represent an addition of sodium in authigenic silicates from alkaline brine and/or evaporites in the playa deposits. In claystone, after albite formed, Na-depleted, Ca, K-enriched waters reacted with the clay minerals such as smectite and kaolinite to yield K-rich illitic sediments, Ca precipitated in calcite cement. P2O5 is enriched in some samples due to phosphorus mobilization during diagenesis.

  • Balogh, K., A. Barabás 1972: The Carboniferous and Permian of Hungary. - Acta Miner.-Petr. Szeged, 20/2, pp. 191 - 207 .

    'The Carboniferous and Permian of Hungary ' () 20 Acta Miner.-Petr. Szeged : 191 -207.

  • Fedo, C., M., H. W. Nesbitt, G.M.Young 1995: Unraveling the effects of potassium metasomatism in sedimentary rocks and paleosols, with implications for paleoweathering conditions and provenance. - Geology, 23, pp. 921 - 924 .

    'Unraveling the effects of potassium metasomatism in sedimentary rocks and paleosols, with implications for paleoweathering conditions and provenance ' () 23 Geology : 921 -924.

    • Search Google Scholar
  • Fedo, C., M., K. A. Eriksson, E. J. Krogstad 1996: Geochemistry of shales from the Archean (~3.0 Ga) Buhwa Greenstone Belt, Zimbabwe: Implications for provenance and source-area weathering. - Geochim. Cosmochim. Acta, 60/10, pp. 1751 - 1763 .

    'Geochemistry of shales from the Archean (~3.0 Ga) Buhwa Greenstone Belt, Zimbabwe: Implications for provenance and source-area weathering ' () 60 Geochim. Cosmochim. Acta : 1751 -1763.

    • Search Google Scholar
  • Garver, J., I., T. J. Scott 1995: Trace elements in shale as indicators of crustal provenance and terrane accretion in the southern Canadian Cordillera. - GSA Bulletin, 107/4, pp. 440 - 453 .

    'Trace elements in shale as indicators of crustal provenance and terrane accretion in the southern Canadian Cordillera ' () 107 GSA Bulletin : 440 -453.

    • Search Google Scholar
  • Haas, J., G. Hámor, L. Korpás 1999: Geological setting and tectonic evolution of Hungary. - Geol. Hung. Ser. Geol., 24, pp. 179 - 196 .

    'Geological setting and tectonic evolution of Hungary ' () 24 Geol. Hung. Ser. Geol. : 179 -196.

    • Search Google Scholar
  • Hassan, S., I. Hiroaki, B. P. Roser, K. Dozen, T. Naka 1999: Geochemistry of Permian-Triassic shales in the Salt Range, Pakistan: implications for provenance and tectonism at the Gondwana margin. - Chem. Geol., 158, pp. 293 - 314 .

    'Geochemistry of Permian-Triassic shales in the Salt Range, Pakistan: implications for provenance and tectonism at the Gondwana margin ' () 158 Chem. Geol. : 293 -314.

    • Search Google Scholar
  • Herron, M., M. 1988: Geochemical classification of terrigenous sands and shales from core or log data. - J. Sed. Petrol ., 58/5, pp. 820 - 829 .

    'Geochemical classification of terrigenous sands and shales from core or log data ' () 58 J. Sed. Petrol. : 820 -829.

    • Search Google Scholar
  • Hofmann, A., R. Bolhar, P.Dirks, H. Jelsma 2003: The geochemistry of Archaean shales derived from a mafic volcanic sequence, Belingwe greenstone belt, Zimbabwe: provenance, source area unroofing and submarine versus subaerial weathering. - Geochim. Cosmochim. Acta, 67/3, pp. 421 - 440 .

    'The geochemistry of Archaean shales derived from a mafic volcanic sequence, Belingwe greenstone belt, Zimbabwe: provenance, source area unroofing and submarine versus subaerial weathering ' () 67 Geochim. Cosmochim. Acta : 421 -440.

    • Search Google Scholar
  • Jámbor, Á. 1964: Lower Permian formations of the Mecsek Mountains. - Manuscript, Mecsek Ore Environment Company, Pécs (In Hungarian.)

  • Kovács, L., G. Hámos, J. Csicsák 2000: Actual state of the site characterization program of the Boda Siltstone Formation. - Bulletin of the Hungarian Geological Society, 130/2, pp. 197 - 206 .

    'Actual state of the site characterization program of the Boda Siltstone Formation ' () 130 Bulletin of the Hungarian Geological Society : 197 -206.

    • Search Google Scholar
  • Lee, Y., I. 2002: Provenance derived from the geochemistry of late Paleozoic-early Mesozoic mudrocks of the Pyeongan Supergroup, Korea. - Sed. Geol., 149, pp. 219 - 235 .

    'Provenance derived from the geochemistry of late Paleozoic-early Mesozoic mudrocks of the Pyeongan Supergroup, Korea ' () 149 Sed. Geol. : 219 -235.

    • Search Google Scholar
  • Máthé, Z. (Ed) 1998: Summary report of the site characterization program of the Boda Siltstone Formation, Vol. 4. - Manuscript, Mecsek Ore Environment Company, Pécs, 76 p.

  • Milliken, K., L. 1989: Petrography and composition of authigenic feldspars, Oligocene Frio Formation, South Texas. - J. Sed. Petrol., 59/3, pp. 361 - 374 .

    'Petrography and composition of authigenic feldspars, Oligocene Frio Formation, South Texas ' () 59 J. Sed. Petrol. : 361 -374.

    • Search Google Scholar
  • Nesbitt, H., W., G. M. Young 1982: Early Proterozoic climates and plate motions inferred from major element chemistry of lutites. - Nature, 299, pp. 715 - 717 .

    'Early Proterozoic climates and plate motions inferred from major element chemistry of lutites ' () 299 Nature : 715 -717.

    • Search Google Scholar
  • Nesbitt, H., W., G. M. Young 1984: Prediction of some weathering trends of plutonic and volcanic rocks based on thermodynamic and kinetic considerations. - Geochim. Cosmochim. Acta, 48, pp. 1523 - 1534 .

    'Prediction of some weathering trends of plutonic and volcanic rocks based on thermodynamic and kinetic considerations ' () 48 Geochim. Cosmochim. Acta : 1523 -1534.

    • Search Google Scholar
  • Pimentel, N., L. V. 2002: Pedogenic and early diagenetic processes in Palaeogene alluvial fan and lacustrine deposits from the Sado Basin (S Portugal). - Sed. Geol., 148, pp. 123 - 138 .

    'Pedogenic and early diagenetic processes in Palaeogene alluvial fan and lacustrine deposits from the Sado Basin (S Portugal) ' () 148 Sed. Geol. : 123 -138.

    • Search Google Scholar
  • Barabás, A., 1955: Permian formations of the Mecsek Mountains. - C.Sc. thesis, Budapest. (In Hungarian.)

  • Barabás, A., Á. Barabás-Stuhl 1998: Stratigraphy of the Permian formations in the Mecsek Mountains and its surroundings. - In: Stratigraphy of geological formations of Hungary. Mol Plc. And Hung. Geol. Institute, Budapest, pp. 187 - 215. (In Hungarian.)

    Stratigraphy of the Permian formations in the Mecsek Mountains and its surroundings , () 187 -215.

    • Search Google Scholar
  • Barabás-Stuhl, Á. (1986-88): Permian clastic sedimentary successions form southern Baranya Hills and Villány Mountains - Summarized results, IV. Manuscript, Mecsek Ore Environment Company, Pécs. (In Hungarian.)

  • Bauluz, B., M. J. Mayayo, C. Fernandez-Nieto, J. M. Gonzalez Lopez 2000: Geochemistry of Precambrian and Paleozoic siliciclastic rocks from the Iberian Range (NE Spain): implications for source-area weathering, sorting, provenance, and tectonic setting. - Chemical Geology, 168, pp. 135 - 150 .

    'Geochemistry of Precambrian and Paleozoic siliciclastic rocks from the Iberian Range (NE Spain): implications for source-area weathering, sorting, provenance, and tectonic setting ' () 168 Chemical Geology : 135 -150.

    • Search Google Scholar
  • Feng, R., R. Kerrich 1990: Geochemistry of fine-grained clastic sediments in the Archean Abitibi greenstone belt, Canada: Implications for provenance and tectonic setting. - Geochim. Cosmochim. Acta, 54, pp. 1061 - 1081 .

    'Geochemistry of fine-grained clastic sediments in the Archean Abitibi greenstone belt, Canada: Implications for provenance and tectonic setting ' () 54 Geochim. Cosmochim. Acta : 1061 -1081.

    • Search Google Scholar
  • Floyd, P., A., J. A. Winchester, R. G. Park 1989: Geochemistry and tectonic setting of Lewisian clastic metasediments from the early Proterozoic Loch Maree Group of Gairloch, N. W. Scotland. - Precambrian Research, 45, pp. 203 - 214 .

    'Geochemistry and tectonic setting of Lewisian clastic metasediments from the early Proterozoic Loch Maree Group of Gairloch, N ' () 45 W. Scotland. - Precambrian Research : 203 -214.

    • Search Google Scholar
  • Fülöp, J. 1994: Geology of Hungary. Paleozoic, II. - Akadémiai Kiadó, Budapest (In Hungarian.)

  • Árkai, P., K. Balogh, A. Demény, I. Fórizs, G. Nagy, Z. Máthé 2000: Composition, diagenetic and post-diagenetic alterations of a possible radioactive waste repository site: the Boda Albitic Claystone Formation, southern Hungary. - Acta Geol. Hungarica, 43/4, pp. 351 - 378 .

    'Composition, diagenetic and post-diagenetic alterations of a possible radioactive waste repository site: the Boda Albitic Claystone Formation, southern Hungary ' () 43 Acta Geol. Hungarica : 351 -378.

    • Search Google Scholar
  • Porada, H., H. J. Behr 1988: Setting and sedimentary facies of late Proterozoic alkali lake (playa) deposits in the southern Damara Belt of Namibia. - Sed. Geol., 58, pp. 171 - 194 .

    'Setting and sedimentary facies of late Proterozoic alkali lake (playa) deposits in the southern Damara Belt of Namibia ' () 58 Sed. Geol. : 171 -194.

    • Search Google Scholar
  • Ronov, A., B., A. A. Migdisov 1971: Geochemical history of the crystalline basement and the sedimentary cover of the Russian and North American Platforms. - Sedimentology, 16, pp. 137 - 185 .

    'Geochemical history of the crystalline basement and the sedimentary cover of the Russian and North American Platforms ' () 16 Sedimentology : 137 -185.

    • Search Google Scholar
  • Varga, R., A., Gy. Szakmány, T. Árgyelán, S. Józsa, B. Raucsik, Z. Máthé (in review): Complex examination of the Late Paleozoic siliciclastic rocks from southern Transdanubia, SW Hungary - mineralogical, petrographic and geochemical study. - GSA Bulletin, Spec. Publ.

  • Saigal, G., C., S. Morad, K. Bjørlykke, P. K. Egeberg, P. Aagaard 1988: Diagenetic albitization of detrital K-feldspar in Jurassic, Lower Cretaceous, and Tertiary clastic reservoir rocks from offshore Norway, I. Textures and origin. - J. Sed. Petrol., 58/6, pp. 1003 - 1013 .

    'Diagenetic albitization of detrital K-feldspar in Jurassic, Lower Cretaceous, and Tertiary clastic reservoir rocks from offshore Norway, I. Textures and origin ' () 58 J. Sed. Petrol. : 1003 -1013.

    • Search Google Scholar
  • F., Z., Sebestyén 2002: Application of the Bootstrap Method for chemical data from the Boda Claystone Formation. - Acta Geol. Hung., 45/2, pp. 207 - 217 .

    'Application of the Bootstrap Method for chemical data from the Boda Claystone Formation ' () 45 Acta Geol. Hung. : 207 -217.

    • Search Google Scholar
  • Taylor, S., R., S. M. McLennan 1985: The Continental Crust: its Composition and Evolution. - Blackwell, Oxford, 312 p.

    The Continental Crust: its Composition and Evolution , () 312.

  • Turner, B., R., D. B. Smith 1997: A playa deposit of pre-Yellow Sands age (upper Rotliegend/Weissliegend) in the Permian of northeast England. - Sed. Geol., 114, pp. 305 - 319 .

    'A playa deposit of pre-Yellow Sands age (upper Rotliegend/Weissliegend) in the Permian of northeast England ' () 114 Sed. Geol. : 305 -319.

    • Search Google Scholar
  • van de Kamp, P. C., B. E. Leake 1996: Petrology, geochemistry, and Na metasomatism of Triassic-Jurassic non-marine clastic sediments in the Newark, Hartford, and Deerfield rift basins, northeastern USA. - Chem. Geol., 133, pp. 89 - 124 .

    'Petrology, geochemistry, and Na metasomatism of Triassic-Jurassic non-marine clastic sediments in the Newark, Hartford, and Deerfield rift basins, northeastern USA ' () 133 Chem. Geol. : 89 -124.

    • Search Google Scholar
  • Weaver, C., E. 1989: Clays, Muds, and Shales. - Elsevier, Amsterdam, 819 p.

    Clays, Muds, and Shales , () 819.

  • Cox, R., D. R. Lowe, R. L. Cullers 1995: The influence of sediment recycling and basement composition on evolution of mudrock chemistry in the southwestern United States. - Geochim. Cosmochim. Acta, 59/14, pp. 2919 - 2940 .

    'The influence of sediment recycling and basement composition on evolution of mudrock chemistry in the southwestern United States ' () 59 Geochim. Cosmochim. Acta : 2919 -2940.

    • Search Google Scholar
  • Eugster, H., P., L. A. Hardie 1978: Saline lakes. - In: A. Lermann (Ed): Physics and Chemistry of Lakes. Springer-Verlag, Berlin, pp. 237 - 293 .

    Saline lakes , () 237 -293.

  • Fazekas, V., 1987: Mineralogical composition of Permian and Lower Triassic clastics from the Mecsek Mts. - Bulletin of the Hungarian Geological Society, 117/1, pp. 11 - 30. (In Hungarian with English abstract.)

    'Mineralogical composition of Permian and Lower Triassic clastics from the Mecsek Mts ' () 117 Bulletin of the Hungarian Geological Society : 11 -30.

    • Search Google Scholar