International Geological Journal - Official Journal of the Carpathian-Balkan Geological Association

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Devonian–Carboniferous pre-flysch and flysch environments in the Circum Pannonian Region

Published: Apr 2008

Pages: 159 - 195

Authors: FRITZ EBNER, ANNA VOZAROVA, SANDOR KOVACS, HANS-GEORG KRAUTNER, BRANISLAV KRSTIC, TIBOR SZEDERKENYI, DOMAGOJ JAMICIC, DRAZEN BALEN, MIRKO BELAK, MIRKA TRAJANOVA

Abstract: The following Devonian–Carboniferous paleogeographic and Variscan orogenic domains were recognized in the Circum Pannonian Region: Oceanic and arc related environments — Noric Bosnian/Carnic-Dinaric Zone (carbonate dominated passive continental margins) — Inovo Zone (Devonian siliciclastic dominated stable continental margins) — Quartzphyllite Complexes — Carpatho-Balkanic intracontinental rift systems — Variscan Flysch Zone — Carboniferous anorogenic turbiditic siliciclastic sediments at stable margins (Bükk-Jadar Zone) — Carboniferous foredeeps and remnant basins (Veitsch/Nötsch-Szabadbattyan-Ochtina Zone) related to metamorphic zones (Mediterranean Crystalline Zone) formed already during an Early Carboniferous (Late Devonian) orogenic event. The syn-orogenic Variscan Flysch Zone formed in the suture at the leading edge of the colliding terranes (Noric Composite Terrane and Variscan Carpatho-Balkanic terranes) along the Laurussian margin (Eastern and Southern Alps, Western and Eastern Carpathians, Carpatho-Balkanides) N to W of the bay of the Carboniferous Paleotethys. This collision was connected with deformation and partly low grade metamorphism and occurred during a Serpukhovian-Bashkirian orogenic event which is also indicated by an unconformable Moscovian/Kasimovian continental molasse. The Variscan deformation of the East Bosnian Durmitor and Central Bosnian Terranes, situated in the Carboniferous SW of the Paleotethys, is only weak and not documented in a sufficient way. Bükk, Sana Una, Jadar Block and Drina-Ivanjica Terranes remained during the Carboniferous subsiding passive margins in shallowing upward systems. Therefore they lack any Variscan deformation, their turbiditic siliciclastic environments cannot be assigned as syn-orogenic flysch deposits and they are covered within Bashkirian-Moskovian times conformably by marine shallow water sediments.

Keywords: Circum-Pannonian Region, Devonian-Carboniferous, paleogeography, stratigraphy, tectonostratigraphic terranes, Variscan orogeny

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