1) GFZ Potsdam 2) University Basel

Tracing the closure of Neotethys from the Alps to Western Turkey I:TheSava-Izmir-Ankara suture zone General Assembly, Vienna EGU2011-4015 6 April 2011 Kamil Ustaszewski1, Daniel Bernoulli2, Bernhard Fügenschuh3, Liviu Matenco4, Roland Oberhänsli5, Senecio Schefer2, Stefan M. Schmid6 1) GFZ Potsdam 2) University Basel 3) University Innsbruck 4) VU Amsterdam 5) University Potsdam 6) ETH Zürich See also: Poster XL 310, EGU2011-4000 Stefan M. Schmid et al.: Tracing the closure of Neotethys from the Alps to Western Turkey II: Similarities and differences between Dinarides, Hellenides and Anatolides-Taurides.

Plate tectonic setting 2. collision 3. extension 4. Neotectonics 5. Cross section Schmid et al., in prep.

Plate tectonic setting 2. collision 3. extension 4. Neotectonics 5. Cross section Sava Izmir Schmid et al., in prep.

Plate tectonic setting 2. collision 3. extension 4. Neotectonics 5. Cross section Sava Izmir Schmid et al. 2008 Neotethys: closure at the Cretaceous – Paleogene boundary Schmid et al., in prep.

Plate tectonic setting 2. collision 3. extension 4. Neotectonics 5. Cross section 1 2 3 Schmid et al. 2008 Neotethys: closure at the Cretaceous – Paleogene boundary Schmid et al., in prep.

1. Sava Zone 2. Dinarides cross section 3. W Turkey Thrust ages Eocene Latest Cretaceous Late Jurassic E E J C C E C C E J C C E J Sava Zone ‘type locality’ Ustaszewski et al. 2010

1. Sava Zone 2. Dinarides cross section 3. W Turkey Ustaszewski et al. 2010

1. Sava Zone 2. Dinarides cross section 3. W Turkey Late Cretaceous magmatism & flysch Ustaszewski et al. 2010

1. Sava Zone 2. Dinarides cross section 3. W Turkey LateCretaceous ophiolites 81-82 Ma LateJurassic Western Vardar ophiolites 158 Ma Ustaszewski et al. 2009

1. Sava Zone 2. Dinarides cross section 3. W Turkey Maastrichtian turbiditic sandstones & shales = “Sava Flysch” Ustaszewski et al. 2010

1. Sava Zone 2. Dinarides cross section 3. W Turkey 100 km 2 Schmid et al., 2008

1. Sava Zone 2. Dinarides cross section 3. W Turkey Internal Adriatic platform: pelagic limest. (Tr.), radiolarites (Early-Mid Jur.) & ophiolites obducted in Late Jurassic 100 km 2 Adriatic Plate Schmid et al., 2008 External Adriatic platform: mostly neritic limestones Polarity of coherent Adriatic shelf from proximal to distal See also: Schefer et al., Geologica Carpathica, 2010

1. Sava Zone 2. Dinarides cross section 3. W Turkey Lower Plate = Adriatic margin suture Upper Plate = Europe Drina-Ivanjica composite nappe: includes obducted W-Vardar ophiolites Jadar-Kopaonik compositenappe: includes obductedW-Vardar Sava Zone ophiolites & flysch Carpatho-Balkan orogen incl. obducted E-Vardar & Transylvanian ophiolites 100 km Top SW Top E Adriatic Plate East Bosnian- Durmitor composite nappe: includes obducted W-Vardar ophiolites Ophiolites of the Dinarides form part of composite nappes but not sutures!

1. Sava Zone 2. Dinarides cross section 3. W Turkey Obduction ≠ Suturing Meliata Meliata Vardar Ustaszewski et al. 2009, modified Vardar Sava Schmid et al.. 2008 Coleman 1981

1. Sava Zone 2. Dinarides cross section 3. W Turkey Okay & Altiner 2007 (modified)

Conclusions 1. Sava Zone 2. Dinarides cross section 3. W Turkey • Sava-Izmir-Ankara Suture Zone is the only End-Cretaceous Neotethys suture between Europe & Adria Data from the Dinarides – Hellenides support a single-ocean concept Further reading: Schefer et al., 2010, Geologica Carpathica Schefer et al., 2010 in press, Int J Earth Sciences Schmid et al.. 2008, Swiss J Geosciences Ustaszewski et al., 2008, Swiss J Geosciences Ustaszewski et al., 2009, Lithos Ustaszewski et al., 2010, Tectonics

Bonus material

1. Sava Zone 2. Dinarides cross section 3. W Turkey Biostratigraphy U-Pb dating Nd-Sr isotopy Early Campanian (81-82 Ma) intra-oceanic magmatism Contusotruncana patelliformis GANDOLFI Pillow basalts intercalated with scaglia rossa Ustaszewski et al. 2009

1. Sava Zone 2. Dinarides cross section 3. Conclusions Late Cretaceous intra-oceanic magmatism & subsequent metamorphism

1. Sava Zone 2. Dinarides cross section 3. Conclusions Ustaszewski et al. 2010

1. Sava Zone 2. Dinarides cross section 3. Conclusions Late Cretaceous metapelites P ≈ 5 - 7 kbar T ≈ 550 - 630 °C

1. Sava Zone 2. Dinarides cross section 3. Conclusions Geochronology 58 Peak-T: between 70.6 & 65 Ma

1. Sava Zone 2. Dinarides cross section 3. Conclusions

1. Sava Zone 2. Dinarides cross section 3. Conclusions Regional cross section

1. Sava Zone 2. Dinarides cross section 3. Conclusions Sava Zone suture Dinarides MOHO from Horvath et al. 2006 Adria in lower-plate position

1. Sava Zone 2. Dinarides cross section 3. Conclusions Time intervals of fault activity 1. 70-65 Ma End Cretaceous thrusts …

1. Sava Zone 2. Dinarides cross section 3. Conclusions Time intervals of fault activity 2. ≥40-26 Ma … propagate into the foreland during the Paleogene

1. Sava Zone 2. Dinarides cross section 3. Conclusions Time intervals of fault activity 3. 25-14 Ma Supradetachment basin … extensional reactivation of suturing thrust as low angle detachment …

1. Sava Zone 2. Dinarides cross section 3. Conclusions Time intervals of fault activity 4. 14-5 Ma … in conjunction with Pannonian Basin subsidence

1. Sava Zone 2. Dinarides cross section 3. Conclusions present Sava Zone Ustaszewski et al. 2008

1. Sava Zone 2. Dinarides cross section 3. Conclusions Subduction polarity between Alps and Dinarides switches across Mid-Hungarian Fault Zone 20 Ma BP Sava Zone Ustaszewski et al. 2008

1) GFZ Potsdam 2) University Basel