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oai:figshare.com:article/33962839 2026-09-22T06:47:33Z category_915 category_272 category_873 category_39 category_45 category_734 category_69 portal_87 item_type_3 month_year_09_2026

The Meliaticum of the eastern Alps – sourced from the east, displaced to the west Harald Fritz (12977954) Josef Nievoll (25088341) Daniela Gallhofer (25088344) Christoph Hauzenberger (765186) Kevin Karner-Rühl (25088347) Kurt Krenn (7549607) Walter Kurz (3641812) Gerhard W. Mandl (25088350) Franz Neubauer (6414959) Etienne Skrzypek (2842931) Physical Sciences not elsewhere classified Environmental Sciences not elsewhere classified Chemical Sciences not elsewhere classified Ecology Sociology Biological Sciences not elsewhere classified Inorganic Chemistry Meliaticum Neotethys sedimentary facies detrital zircon <p>Ocean floor sediments of the Austroalpine Meliata Basin, as part of the Neo-Tethys, contain a variety of rocks interpreted as tectonic mélange. Laminated siltstone, mudstone, radiolarite, and intercalated sandstone represent the Middle Triassic to Middle Jurassic deep-water deposits that contain shallow marine components derived from a carbonatic–clastic shelf. The U/Pb detrital zircon age data from those sandstones suggest the presence of different sources: (1) An Avalonian source delivered abundant Mesoproterozoic zircons from domains bordering Moesia and East European Platform. (2) A Galatian / Ligerian source, as part of the Armorican / Galatian / Ligerian continent, devoid of Mesoproterozoic zircons but with abundant Mississippian zircons (c. 350 Ma), supplied the Meliata Basin with detritus from the ALCAPA super-terrane. (3) Serbo-Macedonia and/or Dacia delivered detritus devoid of Mesoproterozoic zircons, but prevalent Pennsylvanian zircons (c. 310 Ma). Screening datasets from the Alpine–Carpathian–Balkan orogenic belt for granitoid crystallization ages and detrital zircon spectra enables the identification of the ‘home’ of the Austroalpine Meliaticum. The original site of deposition was a seaway extending at a high angle to the Neo-Tethys margin northwards between ALCAPA/Tisza and Dacia, connecting the Neo-Tethys Ocean with the evolving Piemont-Ligurian Ocean. During the Late Jurassic, when the Piemont-Ligurian Ocean (Alpine Tethys) widened and the Neo-Tethys closed, the Austroalpine Meliata units were displaced approximately 400 km westward along a transform fault system connecting both oceans and penetrating the thinned ALCAPA crust.</p> <p></p><p>Austroalpine Meliaticum is a mélange of deep-water sediments deposited adjacent to the Adriatic shelf.</p><p>The detrital U/Pb zircon data indicate provenance from multiple sources. The sediments supplying the Meliata Basin were routed from Avalonia, Galatian / Ligerian ALCAPA, and South Carpathian Dacia/Serbo-Macedonia.</p><p>The Austrian Meliaticum was displaced from its original home 400 km westward during Jurassic strike-slip tectonics.</p><p></p> <p>Austroalpine Meliaticum is a mélange of deep-water sediments deposited adjacent to the Adriatic shelf.</p> <p>The detrital U/Pb zircon data indicate provenance from multiple sources. The sediments supplying the Meliata Basin were routed from Avalonia, Galatian / Ligerian ALCAPA, and South Carpathian Dacia/Serbo-Macedonia.</p> <p>The Austrian Meliaticum was displaced from its original home 400 km westward during Jurassic strike-slip tectonics.</p> 2026-09-22T06:47:33Z Dataset Dataset 10.6084/m9.figshare.33962839.v1 https://figshare.com/articles/dataset/The_Meliaticum_of_the_eastern_Alps_sourced_from_the_east_displaced_to_the_west/33962839 CC BY 4.0