Rapid late Miocene surface uplift of the Central Anatolian Plateau margin

Maud J.M. Meijers, Gilles Y. Brocard, Michael A. Cosca, Tina Lüdecke, Christian Teyssier, Donna L. Whitney, Andreas Mulch

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

The Central Anatolian Plateau (CAP), Turkey, is bordered to its south by a steep mountain belt that emerged ∼8–7 Ma ago from the Mediterranean Sea. Knowledge of the onset, duration and rate of surface uplift and orographic barrier formation along the plateau margin is crucial for understanding the geodynamic drivers of plateau uplift. We present a new comprehensive data set that includes 12 40Ar/39Ar ages and lacustrine carbonate δ18O data (n=637) from 13 sections in upper Oligocene to Pliocene continental basins of the CAP interior. We aim at documenting the development of a rain shadow and therefore the surface uplift history of the CAP and its southern margin (Tauride Mts.). In the rain shadow of the Tauride Mts. we observe a gradual 3.9‰ decrease of δ18O values of lacustrine carbonate between ∼11 and 5 Ma that we interpret to originate from a similar change in δ18O values of precipitation owing to the late Miocene development of an orographic barrier. Our stable isotope paleoaltimetry data show that by 5 Ma the southern CAP margin had reached similar-to-present elevations of ∼2 km. Surface uplift was coeval with ignimbritic magmatism, forearc shortening and distributed compression. We suggest that the removal of lithospheric mantle below Anatolia led to surface uplift of the CAP interior, which was followed by surface uplift of the southern CAP margin due to crustal thickening as a result of northward subduction of the African plate below central Anatolia.

Original languageEnglish (US)
Pages (from-to)29-41
Number of pages13
JournalEarth and Planetary Science Letters
Volume497
DOIs
StatePublished - Sep 1 2018

Bibliographical note

Funding Information:
We acknowledge support through the NSF CD program (EAR-1109762) ‘Central Anatolian Tectonics (CD-CAT)’ to Whitney; the College of Science and Engineering, University of Minnesota (Meijers), and the LOEWE initiative of Hesse's Ministry of Higher Education, Research, and the Arts (Mulch). T. Mikes, C. Lefebvre, B. Rojay, M. Reid, G. Gençalioğlu Kuşcu, and J. Fiebig are thanked for field and laboratory assistance; M. Jones and F. Schemmel for providing original data files. The manuscript greatly benefited from the constructive reviews of three anonymous reviewers, as well as reviews by R. Govers, J. Saylor and an anonymous reviewer of an earlier version of the manuscript. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

Funding Information:
We acknowledge support through the NSF CD program ( EAR-1109762 ) ‘Central Anatolian Tectonics (CD-CAT)’ to Whitney; the College of Science and Engineering, University of Minnesota (Meijers), and the LOEWE initiative of Hesse's Ministry of Higher Education, Research, and the Arts (Mulch). T. Mikes, C. Lefebvre, B. Rojay, M. Reid, G. Gençalioğlu Kuşcu, and J. Fiebig are thanked for field and laboratory assistance; M. Jones and F. Schemmel for providing original data files. The manuscript greatly benefited from the constructive reviews of three anonymous reviewers, as well as reviews by R. Govers, J. Saylor and an anonymous reviewer of an earlier version of the manuscript. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

Publisher Copyright:
© 2018 Elsevier B.V.

Keywords

  • Anatolian plateau
  • Ar/Ar dating
  • continental basins
  • stable isotope geochemistry
  • surface uplift

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