caa a22 4500 606150153 CHVBK 20210128100537.0 cr unu---uuuuu 210128e20150301xx s 000 0 eng 10.1007/s00531-014-1088-4 doi (NATIONALLICENCE)springer-10.1007/s00531-014-1088-4 Upper crustal emplacement and deformation of granitoids inside the Uppermost Unit of the Cretan nappe stack: constraints from U-Pb zircon dating, microfabrics and paleostress analyses [Elektronische Daten] [Tilo Kneuker, Wolfgang Dörr, Rainer Petschick, Gernold Zulauf] The present study is dealing with the emplacement and deformation of diorite and quartz diorite exposed along new road cuts between Agios Nikolaos and Sitia (Uppermost Unit, eastern Crete). Mingling of both melt types is indicated by enclaves of diorite inside quartz diorite and vice versa. The diorite and quartz diorite intruded into coarse-grained white marble, which is in lateral contact to, but also forms the roof of, the intrusive body. Evidence for contact metamorphism is indicated by increasing grain size of calcite in the marble with decreasing distance from the diorite. U-Pb (TIMS) dating of zircons, separated from quartz diorite, yielded a concordant age at 74.0±0.25Ma, which is interpreted as emplacement age. As this age is close to published K-Ar cooling ages of hornblende and biotite, the melt should have intruded and cooled down rapidly at upper structural levels, which is not common for granitoids of the Uppermost Unit of Crete. Upper crustal melt emplacement is also documented by stoped blocks and by the lack of any ductile (viscous) deformation. The diorite and quartz diorite, however, are affected by strong post-Oligocene brittle faulting. Paleostress analysis, based on these faults, revealed a change in stress field from N-S and NNW-SSE shortening by thrusting (convergence between African and European plates) to NNE-SSW and NE-SW shortening accommodated by strike-slip (SW-ward extrusion of the Anatolian microplate). Calcite-twin density indicates high differential stress (260±20MPa) related to these phases of crustal shortening. Springer-Verlag Berlin Heidelberg, 2014 Granitoids nationallicence Uppermost Unit nationallicence Asteroussia complex nationallicence Cretan mélange nationallicence Greece nationallicence U-Pb geochronology nationallicence Kneuker Tilo Institut für Geowissenschaften, Goethe-Universität Frankfurt a.M., Altenhöferalle 1, 60438, Frankfurt am Main, Germany aut Dörr Wolfgang Institut für Geowissenschaften, Goethe-Universität Frankfurt a.M., Altenhöferalle 1, 60438, Frankfurt am Main, Germany aut Petschick Rainer Institut für Geowissenschaften, Goethe-Universität Frankfurt a.M., Altenhöferalle 1, 60438, Frankfurt am Main, Germany aut Zulauf Gernold Institut für Geowissenschaften, Goethe-Universität Frankfurt a.M., Altenhöferalle 1, 60438, Frankfurt am Main, Germany aut International Journal of Earth Sciences Springer Berlin Heidelberg 104/2(2015-03-01), 351-367 1437-3254 104:2<351 2015 104 531 https://doi.org/10.1007/s00531-014-1088-4 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/s00531-014-1088-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kneuker Tilo Institut für Geowissenschaften, Goethe-Universität Frankfurt a.M., Altenhöferalle 1, 60438, Frankfurt am Main, Germany aut NATIONALLICENCE 700 1- Dörr Wolfgang Institut für Geowissenschaften, Goethe-Universität Frankfurt a.M., Altenhöferalle 1, 60438, Frankfurt am Main, Germany aut NATIONALLICENCE 700 1- Petschick Rainer Institut für Geowissenschaften, Goethe-Universität Frankfurt a.M., Altenhöferalle 1, 60438, Frankfurt am Main, Germany aut NATIONALLICENCE 700 1- Zulauf Gernold Institut für Geowissenschaften, Goethe-Universität Frankfurt a.M., Altenhöferalle 1, 60438, Frankfurt am Main, Germany aut NATIONALLICENCE 773 0- International Journal of Earth Sciences Springer Berlin Heidelberg 104/2(2015-03-01), 351-367 1437-3254 104:2<351 2015 104 531