caa a22 4500 445839589 CHVBK 20180317145339.0 cr unu---uuuuu 170323e20111001xx s 000 0 eng 10.1007/s00015-011-0068-y doi (NATIONALLICENCE)springer-10.1007/s00015-011-0068-y Polyphase movement on the Lavanttal Fault Zone (Eastern Alps): reconciling the evidence from different geochronological indicators [Elektronische Daten] [Walter Kurz, Andreas Wölfler, Robert Rabitsch, Johann Genser] The Lavanttal Fault Zone (LFZ) is generally considered to be related to Miocene orogen-parallel escape tectonics in the Eastern Alps. By applying thermochronological methods with retention temperatures ranging from ~450 to ~40°C we have investigated the thermochronological evolution of the LFZ and the adjacent Koralm Complex (Eastern Alps). 40Ar/39Ar dating on white mica and zircon fission track (ZFT) thermochronology were carried out on host rocks (HRs) and fault-related rocks (cataclasites and fault gouges) directly adjacent to the unfaulted protolith. These data are interpreted together with recently published apatite fission track (AFT) and apatite (U-Th)/He ages. Sample material was taken from three drill cores transecting the LFZ. Ar release spectra in cataclastic shear zones partly show strongly rejuvenated incremental ages, indicating lattice distortion during cataclastic shearing or hydrothermal alteration. Integrated plateau ages from fault rocks (~76Ma) are in parts slightly younger than plateau ages from HRs (>80Ma). Incremental ages from fault rock samples are in part highly reduced (~43Ma). ZFT ages within fault gouges (~65Ma) are slightly reduced compared to the ages from HRs, and fission tracks show reduced lengths. Combining these results with AFT and apatite (U-Th)/He ages from fault rocks of the same fault zone allows the recognition of distinct faulting events along the LFZ from Miocene to Pliocene times. Contemporaneous with this faulting, the Koralm Complex experienced accelerated cooling in Late Miocene times. Late-Cretaceous to Palaeogene movement on the LFZ cannot be clearly proven. 40Ar/39Ar muscovite and ZFT ages were probably partly thermally affected along the LFZ during Miocene times. Swiss Geological Society, 2011 Major fault zone nationallicence Koralm Complex nationallicence Austria nationallicence Fault rocks nationallicence Thermochronology nationallicence 40Ar/39Ar dating nationallicence Zircon fission track dating nationallicence Kurz Walter Institut für Erdwissenschaften, Universität Graz, Heinrichstr. 26, 8010, Graz, Austria aut Wölfler Andreas Institut für Erdwissenschaften, Universität Graz, Heinrichstr. 26, 8010, Graz, Austria aut Rabitsch Robert Institut für Angewandte Geowissenschaften, Technische Universität Graz, Rechbauerstr. 12, 8010, Graz, Austria aut Genser Johann Fachbereich Geographie und Geologie, Universität Salzburg, Hellbrunner Str. 34, 5020, Salzburg, Austria aut Swiss Journal of Geosciences SP Birkhäuser Verlag Basel 104/2(2011-10-01), 323-343 1661-8726 104:2<323 2011 104 15 https://doi.org/10.1007/s00015-011-0068-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00015-011-0068-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kurz Walter Institut für Erdwissenschaften, Universität Graz, Heinrichstr. 26, 8010, Graz, Austria aut NATIONALLICENCE 700 1- Wölfler Andreas Institut für Erdwissenschaften, Universität Graz, Heinrichstr. 26, 8010, Graz, Austria aut NATIONALLICENCE 700 1- Rabitsch Robert Institut für Angewandte Geowissenschaften, Technische Universität Graz, Rechbauerstr. 12, 8010, Graz, Austria aut NATIONALLICENCE 700 1- Genser Johann Fachbereich Geographie und Geologie, Universität Salzburg, Hellbrunner Str. 34, 5020, Salzburg, Austria aut NATIONALLICENCE 773 0- Swiss Journal of Geosciences SP Birkhäuser Verlag Basel 104/2(2011-10-01), 323-343 1661-8726 104:2<323 2011 104 15 Metadata rights reserved Springer special CC-BY-NC licence nationallicence SWISSBIB 248631519 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer