Multiple exhumation phases in the Central Pontides (N Turkey)

  • The Central Pontides of N Turkey represents a mobile orogenic belt of the southern Eurasian margin that experienced several phases of exhumation associated with the consumption of different branches of the Neo-Tethys Ocean and the amalgamation of continental domains. Our new low-temperature thermochronology data help to constrain the timing of these episodes, providing new insights into associated geodynamic processes. In particular, our data suggest that exhumation occurred at (1) similar to 110 to 90Ma, most likely during tectonic accretion and exhumation of metamorphic rocks from the subduction zone; (2) from similar to 60 to 40Ma, during the collision of the Kirehir and Anatolide-Tauride microcontinental domains with the Eurasian margin; (3) from similar to 0 to 25Ma, either during the early stages of the Arabia-Eurasia collision (soft collision) when the Arabian passive margin reached the trench, implying 70 to 530km of subduction of the Arabian passive margin, or during a phase of trench advance predating hard collision atThe Central Pontides of N Turkey represents a mobile orogenic belt of the southern Eurasian margin that experienced several phases of exhumation associated with the consumption of different branches of the Neo-Tethys Ocean and the amalgamation of continental domains. Our new low-temperature thermochronology data help to constrain the timing of these episodes, providing new insights into associated geodynamic processes. In particular, our data suggest that exhumation occurred at (1) similar to 110 to 90Ma, most likely during tectonic accretion and exhumation of metamorphic rocks from the subduction zone; (2) from similar to 60 to 40Ma, during the collision of the Kirehir and Anatolide-Tauride microcontinental domains with the Eurasian margin; (3) from similar to 0 to 25Ma, either during the early stages of the Arabia-Eurasia collision (soft collision) when the Arabian passive margin reached the trench, implying 70 to 530km of subduction of the Arabian passive margin, or during a phase of trench advance predating hard collision at similar to 20Ma; and (4) similar to 11Ma to the present, during transpression associated with the westward motion of Anatolia. Our findings document the punctuated nature of fault-related exhumation, with episodes of fast cooling followed by periods of slow cooling or subsidence, the role of inverted normal faults in controlling the Paleogene exhumation pattern, and of the North Anatolian Fault in dictating the most recent pattern of exhumation.show moreshow less

Export metadata

Additional Services

Share in Twitter Search Google Scholar Statistics
Metadaten
Author details:Paolo BallatoORCiD, Mauricio ParraORCiD, Taylor F. SchildgenORCiD, I. Dunkl, C. Yildirim, Erman ÖzsayinORCiD, Edward R. SobelORCiDGND, H. Echtler, Manfred R. StreckerORCiDGND
DOI:https://doi.org/10.1029/2017TC004808
ISSN:0278-7407
ISSN:1944-9194
Title of parent work (English):Tectonics
Subtitle (English):new temporal constraints on Major geodynamic changes associated with the closure of the Neo-Tethys Ocean
Publisher:American Geophysical Union
Place of publishing:Washington
Publication type:Article
Language:English
Date of first publication:2018/05/21
Completion year:2018
Release date:2021/11/25
Tag:Anatolia westward motion; Arabia-Eurasia collision; Central Pontides; inversion tectonics; thermal modeling; trench advance
Volume:37
Issue:6
Number of pages:27
First page:1831
Last Page:1857
Funding institution:TOPO-EUROPE, an initiative of the European Science Foundation; EU Marie Sklodowska-Curie Actions program Initial Training Networks (ITN); Emmy Noether Programm of the Deutsche Forschungsgemeinschaft (DFG) [SCHI 1241/1-1]
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Geowissenschaften
DDC classification:5 Naturwissenschaften und Mathematik / 55 Geowissenschaften, Geologie / 550 Geowissenschaften
Peer review:Referiert
Publishing method:Open Access / Green Open-Access