Middle-Late Jurassic sedimentary mélange formation related to ophiolite obduction in the Alpine-Carpathian-Dinaridic Mountain Range

Hans-Jürgen Gawlick, Sigrid Missoni

Publikation: Beitrag in FachzeitschriftArtikelForschungBegutachtung

23 Zitate (Scopus)

Abstract

The Middle-Late Jurassic mountain building process in the Western Tethyan realm was triggered by west- to northwestward-directed ophiolite obduction onto the wider Adriatic shelf. This southeastern to eastern Adriatic shelf was the former passive continental margin of the Neo-Tethys, which started to open in the Middle Triassic. Its western parts closed from around the Early/Middle Jurassic boundary with the onset of east-dipping intra-oceanic subduction. Ongoing contraction led to ophiolite obduction onto the former continental margin since the Bajocian. Trench-like basins formed concomitantly within the evolving thin-skinned orogen in a lower plate situation. Deep-water basins formed in sequence with the northwest-/westward propagating nappe fronts, which served as source areas of the basin fills. Basin deposition was characterized by coarsening-upward cycles, i.e. sedimentary mélanges as synorogenic sediments. The basin fills became sheared successively by ongoing contractional tectonics with features of typical mélanges. Analyses of ancient Neo-Tethys mélanges along the Eastern Mediterranean mountain ranges allow both, a facies reconstruction of the outer western passive margin of the Neo-Tethys and conclusions on the processes and timing of Jurassic orogenesis. Comparison of mélanges identical in age and component spectrum in different mountain belts figured out one Neo-Tethys Ocean in the Western Tethyan realm, instead of multi-ocean and multi-continent scenarios.

OriginalspracheEnglisch
Seiten (von - bis)144-172
Seitenumfang29
FachzeitschriftGondwana research
Jahrgang74.2019
AusgabenummerOctober
Frühes Online-Datum11 März 2019
DOIs
PublikationsstatusVeröffentlicht - Okt. 2019

Bibliographische Notiz

Funding Information:
This study was supported by grants from the Austrian Science Foundation (FWF): FWF Hertha-Firnberg project T533-N21 (SM), FWF stand-alone projects P15060, P16812-B06 (HJG), OEAD-WTZ cooperation projects HU 14/2005, SI 05/2007, HR 05/2008, HU 05/2008, SK 05/2009, SK 04/2011, RO 02/2012, SK 08/2013, RO 09/2014, ME 05/2017 and the CEEPUS Network CIII-RO-0038 Earth-Science Studies in Central and South-Eastern Europe (HJG). Numerous discussions and contributions of the co-workers and co-operation partners, e.g. R. Aubrecht (Bratislava/Slovakia), M. Auer (Heidenheim/Germany), I. Bucur (Cluj-Napoca/Romania), W. Frisch (Tübingen/Germany), S. Gorican (Ljubljana/Slovenia), J. Haas (Budapest/Hungary), L. Hoxha (Tirana/Albania), A. Kilias (Thessaloniki/Greece), S. Kovács (Budapest/Hungary), L. Krystyn (Vienna/Austria), R. Lein (Vienna/Austria), C. Pero (Budapest/Hungary), D. Plasienka (Bratislava/Slovakia), E. Sasaran (Cluj-Napoca/Romania), F. Schlagintweit (Munich/Germany), S. Schmid (Basel/Switzerland), M. Sudar (Belgrade/Serbia), H. Suzuki (Kyoto/Japan), J. Tisljar (Zagreb/Croatia), I. Velic (Zagreb/Croatia), I. Vlahovic (Zagreb/Croatia), and many others are gratefully acknowledged. Careful reviews of G. Nirta (Firenze/Italy) and A. Kilias (Thessaloniki/Greece) are gratefully acknowledged.

Publisher Copyright:
© 2019 International Association for Gondwana Research

Schlagwörter

  • palaeogeography, tethys, mélange

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