S-type granitoids in the Tisza Mega-unit: Geochronological constraints and implications for the Paleozoic magmatic evolution of the Central European Variscides

Szemerédi, Máté and Dunkl, István and Miklós, Dóra Georgina and Lukács, Réka and Horvat, Marija and Sebe, Krisztina and Máthé, Árpád and Kovács, Zoltán and Máthé, Zoltán and Benkó, Zsolt and Szepesi, János and Harangi, Szabolcs and Pál-Molnár, Elemér (2026) S-type granitoids in the Tisza Mega-unit: Geochronological constraints and implications for the Paleozoic magmatic evolution of the Central European Variscides. LITHOS, 544-45. No. 108770. ISSN 0024-4937 (print); 1872-6143 (online)

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Abstract

Integrated mineralogical, petrological, geochemical, and geochronological investigations of S-type granitoids and their variably deformed or metamorphosed equivalents reveal three distinct Paleozoic magmatic episodes in the Tisza Mega-unit of the Carpathian–Pannonian region. (1) Early Ordovician (∼480–470 Ma) ages were obtained from orthogneisses of Papuk Mt. (Slavonian Mts), which are interpreted as products of syn-collisional to post-orogenic processes along the northern Gondwanan margin. (2) Late Devonian–Early Carboniferous (∼370–340 Ma) magmatism is represented by the Codru granodiorites from the SW Apuseni Mts and granitoids from the Battonya–Pusztaföldvár Basement Ridge (eastern Pannonian Basin). These rocks exhibit mixed arc-related and syn-collisional signatures, consistent with the Variscan subduction-to-collision transition and possible slab break-off. Mineralogical, geochemical, and geochronological data support correlations between these igneous bodies. (3) Middle Permian (∼270 Ma) magmatism is recorded by monzogranitic pebbles from Lower Miocene siliciclastic deposits in the western Mecsek Mts and is interpreted as post-collisional crustal magmatism coeval with rift-related A-type magmatism and associated volcanic activity in the region. On a regional scale, Paleozoic igneous rocks of the Tisza Mega-unit correlate with those of the Western Carpathians, where comparable Early Ordovician, Early Carboniferous, and Middle Permian magmatic events have been documented. These similarities indicate a broadly shared Paleozoic tectono-magmatic evolution along the northern margin of Gondwana and later within the Central European Variscides.

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