caa a22 4500 606149759 CHVBK 20210128100535.0 cr unu---uuuuu 210128e20151101xx s 000 0 eng 10.1007/s00531-014-1105-7 doi (NATIONALLICENCE)springer-10.1007/s00531-014-1105-7 Origin and geodynamic relationships of the Late Miocene to Quaternary alkaline basalt volcanism in the Pannonian basin, eastern-central Europe [Elektronische Daten] [Szabolcs Harangi, M. Jankovics, Tamás Sági, Balázs Kiss, Réka Lukács, Ildikó Soós] Alkaline basaltic volcanism has been taking place in the Carpathian-Pannonian region since 11Ma and the last eruptions occurred only at 100-500ka. It resulted in scattered low-magma volume volcanic fields located mostly at the margins of the Pannonian basin. Many of the basalts have compositions close to those of the primitive magmas and therefore can be used to constrain the conditions of the magma generation. Low-degree (2-3%) melting could occur in the convective asthenosphere within the garnet-spinel transition zone. Melting started at about 100km depth and continued usually up to the base of the lithosphere. Thus, the final melting pressure could indicate the ambient lithosphere-asthenosphere boundary. The asthenospheric mantle source regions of the basalts were heterogeneous, presumably in small scale, and included either some water or pyroxenite/eclogite lithology in addition to the fertile to slightly depleted peridotite. Based on the prevailing estimated mantle potential temperature (1,300-1,400°C) along with the number of further observations, we exclude the existence of mantle plume or plume fingers beneath this region. Instead, we propose that plate tectonic processes controlled the magma generation. The Pannonian basin acted as a thin spot after the 20-12Ma syn-rift phase and provided suction in the sublithospheric mantle, generating asthenospheric flow from below the adjoining thick lithospheric domains. A near-vertical upwelling along the steep lithosphere-asthenosphere boundary beneath the western and northern margins of the Pannonian basin could result in decompressional melting producing low-volume melts. The youngest basalt volcanic field (Perşani) in the region is inferred to have been formed due to the dragging effect of the descending lithospheric slab beneath the Vrancea zone that could result in narrow rupture at the base of the lithosphere. Continuation of the basaltic volcanism cannot be excluded as inferred from the still fusible condition of the asthenospheric mantle. This is reinforced by the detected low-velocity seismic anomalies in the upper mantle beneath the volcanic fields. Springer-Verlag Berlin Heidelberg, 2014 Basalt nationallicence Spinel nationallicence Carpathian-Pannonian region nationallicence Magma genesis nationallicence Monogenetic volcanic field nationallicence Asthenosphere flow nationallicence Harangi Szabolcs MTA-ELTE Volcanology Research Group, Pázmány sétány 1/C, 1117, Budapest, Hungary aut Jankovics M. MTA-ELTE Volcanology Research Group, Pázmány sétány 1/C, 1117, Budapest, Hungary aut Sági Tamás MTA-ELTE Volcanology Research Group, Pázmány sétány 1/C, 1117, Budapest, Hungary aut Kiss Balázs MTA-ELTE Volcanology Research Group, Pázmány sétány 1/C, 1117, Budapest, Hungary aut Lukács Réka MTA-ELTE Volcanology Research Group, Pázmány sétány 1/C, 1117, Budapest, Hungary aut Soós Ildikó MTA-ELTE Volcanology Research Group, Pázmány sétány 1/C, 1117, Budapest, Hungary aut International Journal of Earth Sciences Springer Berlin Heidelberg 104/8(2015-11-01), 2007-2032 1437-3254 104:8<2007 2015 104 531 https://doi.org/10.1007/s00531-014-1105-7 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00531-014-1105-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Harangi Szabolcs MTA-ELTE Volcanology Research Group, Pázmány sétány 1/C, 1117, Budapest, Hungary aut NATIONALLICENCE 700 1- Jankovics M. MTA-ELTE Volcanology Research Group, Pázmány sétány 1/C, 1117, Budapest, Hungary aut NATIONALLICENCE 700 1- Sági Tamás MTA-ELTE Volcanology Research Group, Pázmány sétány 1/C, 1117, Budapest, Hungary aut NATIONALLICENCE 700 1- Kiss Balázs MTA-ELTE Volcanology Research Group, Pázmány sétány 1/C, 1117, Budapest, Hungary aut NATIONALLICENCE 700 1- Lukács Réka MTA-ELTE Volcanology Research Group, Pázmány sétány 1/C, 1117, Budapest, Hungary aut NATIONALLICENCE 700 1- Soós Ildikó MTA-ELTE Volcanology Research Group, Pázmány sétány 1/C, 1117, Budapest, Hungary aut NATIONALLICENCE 773 0- International Journal of Earth Sciences Springer Berlin Heidelberg 104/8(2015-11-01), 2007-2032 1437-3254 104:8<2007 2015 104 531