No sediment transport across the Tethys ocean during the latest Cretaceous: detrital zircon record from the Pontides and the Anatolide-Tauride Block


Okay A., Kylander-Clark A. R. C.

INTERNATIONAL JOURNAL OF EARTH SCIENCES, 2022 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Publication Date: 2022
  • Doi Number: 10.1007/s00531-022-02275-1
  • Journal Name: INTERNATIONAL JOURNAL OF EARTH SCIENCES
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aquatic Science & Fisheries Abstracts (ASFA), CAB Abstracts, Geobase, INSPEC, Pollution Abstracts
  • Keywords: Detrital zircons, Late Cretaceous, Pontides, Bornova Flysch Zone, Anatolide-Tauride Block, Carboniferous, SOUTHERN MENDERES MASSIF, BORNOVA FLYSCH ZONE, HIGH-TEMPERATURE METAMORPHISM, ECLOGITE-FACIES ROCKS, LU-HF GEOCHRONOLOGY, U-PB GEOCHRONOLOGY, WESTERN TURKEY, NW TURKEY, KARABURUN PENINSULA, NORTHWEST TURKEY
  • Istanbul Technical University Affiliated: Yes

Abstract

We report detrital zircon ages from the Upper Cretaceous (Campanian-Maastrichtian) turbiditic sandstones from the Pontides and the Anatolide-Tauride Block, which were located on opposite margins of the Tethys ocean during most of the Paleozoic and Mesozoic. The large data set includes both published and new detrital zircon ages from the Upper Cretaceous Pontide sandstones (2730 zircon ages from 26 samples) and new detrital zircon ages from the uppermost Cretaceous Bornova Flysch of the Anatolide-Tauride Block (378 ages from five samples). Phanerozoic detrital zircons from the Upper Cretaceous sandstones of the Pontides are predominantly Late Cretaceous (56%) followed by Carboniferous (7.9%), Devonian (5.3%), Jurassic (3.1%) and Triassic (2.9%). In contrast, there are no Cretaceous and Jurassic detrital zircons in the uppermost Cretaceous Bornova Flysch, and the Phanerozoic detrital zircon populations are mainly Carboniferous (41.3%), Triassic (7.1%), Permian (6.9%) and Devonian (5.3%). The absence of Cretaceous and Jurassic zircons in the Bornova Flysch shows that there was no sediment transport between the Pontides and the Anatolide-Tauride Block during the latest Cretaceous (75-70 Ma); it also shows that the latest Cretaceous - Paleocene deformation of the Bornova Flysch Zone predates the collision between the Pontides and the Anatolide-Tauride Block, and is associated with ophiolite obduction. The dominance of Carboniferous detrital zircons in the Bornova Flysch Zone underlines that Carboniferous magmatic activity in the Anatolide-Tauride Block, and hence on the northern margin of Gondwana, was more significant than hitherto recognized.