caa a22 4500 467889929 CHVBK 20180406152746.0 cr unu---uuuuu 170328e20060901xx s 000 0 eng 10.1007/s00710-006-0153-5 doi (NATIONALLICENCE)springer-10.1007/s00710-006-0153-5 Thöni M. Centre for Earth Sciences, University of Vienna, Vienna, Austria aut Dating eclogite-facies metamorphism in the Eastern Alps - approaches, results, interpretations: a review [Elektronische Daten] [M. Thöni] Summary: In the Eastern Alps, different tectonic units contain eclogites of Carboniferous, Cretaceous (eo-Alpine), and Cenozoic age: (i) In the structurally lower Penninic unit, which is exposed in the Tauern window, eclogites formed at peak P-T conditions of 2.4 GPa and ≤630 °C as a result of subduction of the former European continental margin at the base of an imbricate stack of Mesozoic oceanic rocks below the Austroalpine domain. Amphibole and phengite 40Ar-39Ar and Rb-Sr multimineral isochron ages suggest an Eocene-Early Oligocene (<45-31 Ma) age for the stage of deepest subduction and rapid exhumation/cooling. (ii) Variscan MORB-type eclogites are present in the central Ötztal basement (2.7 GPa/730 °C; mean Sm-Nd age: 347 Ö 9 Ma), the eastern Silvretta (ca. 350 Ma), and the Ulten high-grade crystalline (336 ± 4 Ma). These domains pertain to the N Apulian (Austroalpine) crust. (iii) In the southern Austroalpine units, eclogites and high-P metapelites are known from the Texel complex (1.3 GPa/520-600 °C), the Schober area (1.8 GPa/≤690 °C), and the Saualpe-Koralpe-Pohorje domain (2.2-≤2.7 GPa/≤750 °C). Their tectonic position and near-identical Cretaceous ages suggest a common subduction-exhumation history. This "eo-Alpine high-pressure belt” (EHB) resulted from burial of the strongly thinned, distal passive Neotethyan margin of the Meliata back-arc basin and, further west, pre-Alpine Austroalpine crust along an intracontinental subduction zone during the Late Mesozoic convergence of Apulia and Europe. Peak metamorphism and initial decompression/exhumation is dated by the Sm-Nd, Lu-Hf, U-Pb and Rb-Sr systems as close to 90 Ma, with mean exhumation rates in the range of 5-≤10 km/Ma for the time between 90 and 85 Ma B.P. Springer-Verlag, 2006 Mineralogy and Petrology Springer-Verlag 88/1-2(2006-09-01), 123-148 0930-0708 88:1-2<123 2006 88 710 https://doi.org/10.1007/s00710-006-0153-5 text/html Onlinezugriff via DOI 1 review-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00710-006-0153-5 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Thöni M. Centre for Earth Sciences, University of Vienna, Vienna, Austria aut NATIONALLICENCE 773 0- Mineralogy and Petrology Springer-Verlag 88/1-2(2006-09-01), 123-148 0930-0708 88:1-2<123 2006 88 710 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer