Chronology of subduction and collision along the İzmir-Ankara suture in Western Anatolia: records from the Central Sakarya Basin - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue International Geology Review Année : 2018

Chronology of subduction and collision along the İzmir-Ankara suture in Western Anatolia: records from the Central Sakarya Basin

Faruk Ocakoğlu
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Aynur Hakyemez
  • Fonction : Auteur
Sanem Açikalin
  • Fonction : Auteur
Sevinç Özkan Altiner
  • Fonction : Auteur
Yeşim Büyükmeriç
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Huriye Demircan
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Ümit Şafak
  • Fonction : Auteur
Ayşegül Yildiz
  • Fonction : Auteur
İsmail Ömer Yilmaz
  • Fonction : Auteur
Michael Wagreich
Clay Campbell

Résumé

Western Anatolia is a complex assemblage of terranes, including the Sakarya Terrane and the Tauride-Anatolide Platform that collided during the late Cretaceous and Palaeogene (80-25 Ma) after the closure of the Izmir-Ankara Ocean. Determining the precise timing at which this ocean closed is particularly important to test kinematic reconstructions and geodynamic models of the Mediterranean region, and the chronology of suturing and its mechanisms remain controversial. Here, we document the Cretaceous-Eocene sedimentary history of the Central Sakarya Basin, along the northern margin of the Neotethys Ocean, via various approaches including biostratigraphy, geochronology, and sedimentology. Two high-resolution sections from the Central Sakarya Basin show that pelagic carbonate sedimentation shifted to rapid siliciclastic deposition in the early Campanian (~79.6 Ma), interpreted to be a result of the build-up of the accretionary prism at the southern margin of the Sakarya Terrane. Rapid onset of deltaic progradation and an increase in accumulation rates in the late Danian (~61 Ma), as well as a local angular unconformity are attributed to the onset of collision between the Sakarya Terrane and the Tauride-Anatolide Platform. Thus, our results indicate that though deformation of the subduction margin in Western Anatolia started as early as the Campanian, the closure of the İzmir-Ankara Ocean was only achieved by the early Palaeocene.

Dates et versions

hal-03469373 , version 1 (28-01-2022)

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Faruk Ocakoğlu, Aynur Hakyemez, Sanem Açikalin, Sevinç Özkan Altiner, Yeşim Büyükmeriç, et al.. Chronology of subduction and collision along the İzmir-Ankara suture in Western Anatolia: records from the Central Sakarya Basin. International Geology Review, 2018, 61, pp.1244 - 1269. ⟨10.1080/00206814.2018.1507009⟩. ⟨hal-03469373⟩
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