Orogenic Processes in the Alpine Collision Zone Guest Editors: Nikolaus Froitzheim Stefan M. Schmid Vol. 101 Swiss Journal of Geosciences Supplement 1 formerly Eclogae Geologicae Helvetiae 2008 Pages S1–S 310 ISSN 1661-8726 Journal of the Swiss Geological Society Swiss Society of Mineralogy and Petrology Swiss Palaeontological Society and affiliated organisations and specialist groups: Platform Geosciences of the Swiss Academy of Sciences Swiss Geological Survey Swiss Tectonic Studies Group SwissSed Swiss Group of Geophysicists Contents FROITZHEIM, N., SCHMID, S. M.: HERWARTZ, D., MÜNKER, C., SCHERER, E. E., NAGEL, T. J., Orogenic processes in the Alpine collision zone, Preface ....... S1 PLEUGER, J., FROITZHEIM, N.: Lu-Hf garnet geochronology of eclogites from the Balma ROURE, F.: Unit (Pennine Alps): implications for Alpine paleotectonic Foreland and Hinterland basins: what controls their evolution? S5 reconstructions .......................................... S173 MIKES, T., CHRIST, D., PETRI, R., DUNKL, I., FREI, D., KURZ, W., HANDLER, R., BERTOLDI, C.: BÁLDI-BEKE, M., REITNER, J., WEMMER, K., HRVATOVIĆ, H., Tracing the exhumation of the Eclogite Zone (Tauern Window, VON EYNATTEN, H.: Eastern Alps) by 40Ar/39Ar dating of white mica in eclogites .... S191 Provenance of the Bosnian Flysch .......................... S31 LUTH, S. W., WILLINGSHOFER, E.: ORTNER, H., USTASZEWSKI, M., RITTNER, M.: Mapping of the post-collisional cooling history of the Eastern Late Jurassic tectonics and sedimentation: breccias in the Unken Alps ................................................... S207 syncline, central Northern Calcareous Alps .................. S55 DANIŠÍK, M., KOHÚT, M., DUNKL, I., HRAŠKO, L., FRISCH, W.: VESELÁ, P., LAMMERER, B.: Apatite fission track and (U-Th)/He thermochronology of the The Pfitsch-Mörchner Basin, an example of the post-Variscan Rochovce granite (Slovakia) – implications for the thermal sedimentary evolution in the Tauern Window (Eastern Alps) . S73 evolution of the Western Carpathian-Pannonian region........ S225 DUMONT, T., CHAMPAGNAC, J.-D., CROUZET, C., ROCHAT, P.: PISCHINGER, G., KURZ, W., ÜBLEIS, M., EGGER, M., FRITZ, H., Multistage shortening in the Dauphiné zone (French Alps): BROSCH, F. J., STINGL, K.: the record of Alpine collision and implications for pre-Alpine Fault slip analysis in the Koralm Massif (Eastern Alps) and con- restoration.............................................. S89 sequences for the final uplift of “cold spots” in Miocene times . S235 THÖNY, W. F., T ROPPER, P., SCHENNACH, F., KRENN, E., FODOR, L. I., GERDES, A., DUNKL, I., KOROKNAI, I., FINGER, F., KAINDL, R., BERNHARD, F., HOINKES, G.: The metamorphic evolution of migmatites from the Ötztal PÉCSKAY, Z., TRAJANOVA, M., HORVÁTH, P., VRABEC, M., Complex (Tyrol, Austria) and constraints on the timing of the JELEN, B., BALOGH, K., FRISCH, W.: pre-Variscan high-T event in the Eastern Alps ............... S111 Miocene emplacement and rapid cooling of the Pohorje pluton at the Alpine-Pannonian-Dinaridic junction, Slovenia ......... S255 WIEDERKEHR, M., BOUSQUET, R., SCHMID, S. M., BERGER, A.: From subduction to collision: thermal overprint of HP/LT meta- USTASZEWSKI, K., SCHMID, S. M., FÜGENSCHUH, B., sediments in the north-eastern Lepontine Dome (Swiss Alps) TISCHLER, M., KISSLING, E., SPAKMAN, W.: and consequences regarding the tectono-metamorphic evolution A map-view restoration of the Alpine-Carpathian-Dinaridic of the Alpine orogenic wedge.............................. S127 system for the Early Miocene.............................. S273 RÜTTI, R., MARQUER, D., THOMPSON, A. B.: TUECKMANTEL, C., SCHMIDT, S., NEISEN, M., GEORGIEV, N., Tertiary tectono-metamorphic evolution of the European NAGEL, T. J., FROITZHEIM, N.: margin during Alpine collison: example of the Leventina Nappe The Rila-Pastra Normal Fault and multi-stage extensional un- (Central Alps, Switzerland)................................ S157 roofing in the Rila Mountains (SW Bulgaria) ................ S295 1661-8726/08/01S001-3 Swiss J. Geosci. 101 (2008) Supplement 1, S1–S3 DOI 10.1007/s00015-008-1296-7 Birkhäuser Verlag, Basel, 2008 Orogenic processes in the Alpine collision zone Preface to the Special Issue of the Swiss Journal of Geosciences devoted to “Orogenic processes in the Alpine collision zone” NIKOLAUS FROITZHEIM1 & STEFAN M. SCHMID2 INVITED EDITORS The papers in this issue further elaborate themes that were pre- What controls their evolution?, (7) From Neogene to present- sented at the 8th Workshop on Alpine Geological Studies held day Alps: Neotectonics, brittle tectonics, big tunnels, and finally, in Davos on 10–12 October 2007. Ever since a first meeting in (8) Coupling of climate, uplift, erosion, and topography. Grenoble that took place in 1993, a series of successor Work- Keynote lectures opening the sessions were given by shops on Alpine Geological Studies has continued in a two-year Thorsten Nagel (Bonn), Edi Kissling (Zürich), Onno Oncken rhythm: 1995 Basel, 1997 Biella – Oropa, 1999 Tübingen, 2001 (Potsdam), Alfons Berger (Bern), Liviu Matenco (Amster- Obergurgl, 2003 Sopron, 2005 Opatija. Gradually, the study area dam), Francois Roure (Paris), and Sean Willett (Zürich). Ben encompassed by these meetings was enlarged beyond the Alps Reinhardt (Dornach) offered an introduction to the geologic in the strict sense. More and more contributions touched on results of and problems encountered along the construction of other parts of the Alpine Collision Zone such as the Carpath- the Lötschberg and Gotthard base tunnels in a public lecture ians, Dinarides or Apennines. Thereby an increasing multitude entitled “Lange Tunnels durch die Alpen: NEAT aus der Sicht of various processes leading to collisional mountain building in des Geologen”. general could be discussed. Consequently, this present volume The presentations and discussions during the workshop re- captures a part of that same diversity. The 8th workshop in 2007 flected the recent development of Alpine geology. An increas- took place with 117 participants from 14 countries. ing part of Alpine geological research deals with the Neogene Two excursions to the high Alpine area around Davos were to recent evolution of the earth’s surface and with the interplay carried out before and after the workshop, favoured by clear, of climate and tectonics. For this field of research, the Alps are warm autumn weather prevailing during the entire conference. ideally suited as a natural laboratory because of their limited The pre-workshop field trip on October 9, guided by Daniel size, well-constrained boundary conditions, and high density of Bernoulli (Basel) and Othmar Müntener (Lausanne), was de- data. Several presentations dealt with the tectonic continua- voted to the ophiolites at Totalp, where lithologies and struc- tions of the Alps into the Carpathians and Dinarides and as far tures testify for the exhumation of subcontinental mantle rocks as the Balkan Peninsula. The intense, border-crossing research during the opening of the Piemont-Ligurian Ocean in Jurassic in these areas is proceeding towards a stage where a synoptic times. The second field trip of October 13 was a hike from St. picture of the tectonic evolution emerges. Important new find- Antönien near Klosters to the Tilisuna area, across the Alpine ings were also presented by several groups working on bio- and nappe stack at the Penninic-Austroalpine boundary. It was lithostratigraphy in basin sediments around the Alpine orogen. guided by Thorsten Nagel and Niko Froitzheim (Bonn). It was remarkable that this particular Alpine Workshop finally During the three lecture days, 50 oral and 68 poster contri- managed to bring together geologists working on the tectono- butions were presented, organized into the following topical metamorphic history of the Alps with those working on the sessions: (1) Alpine oceans: Rifting, break-up, spreading, and stratigraphy of adjacent foreland basins. paleogeography, (2) Deep structure, lithospheric strength, and This volume captures some highlights of the 2007 Davos mantle dynamics, (3) From subduction to collision, (4) Tectonic Workshop. 16 articles cover a multitude of Alpine-type work- and metamorphic processes and the role of HP/UHP metamor- ing areas and processes active in collisional mountain build- phic rocks, (5) Orogenic curvature and kinematics of the Alps- ing. We wish to acknowledge the financial contributions of Carpathians-Dinarides, (6) Foreland and hinterland basins: the Schweizerische Nationalfonds and the Swiss Academy of 1 Steinmann-Institut für Geologie Mineralogie und Paläontologie, Universität Bonn, Meckenheimer Allee 171, 53115 Bonn, Germany. E-mail: niko.froitzheimuni-bonn.de 2 Geologisch-Paläontologisches Institut, Universität Basel, Bernoullistr. 32, 4056 Basel, Switzerland. E-mail: [email protected] Preface S1 Sciences towards the organization of the 8th Workshop on Al- orogeny in the French external Alps (Dauphiné Zone). The pine Geological Studies in Davos and the publication of this authors show that Eocene or older deformation was followed series of articles. We are also grateful to the editors of the Swiss by N to NW-oriented basement thrusting so far only reported Journal of Geosciences who agreed to host this Special Issue, for more internal parts of the Western Alps. The classical main particularly Stefan Bucher who assisted the technical aspects WNW-directed compression represents a third event, indicat- of editing, and the three supporting Swiss Earth Science Soci-