Diagenetic Evolution of Upper Jurassic-Lower Cretaceous Berdiga Formation, NE Turkey: Petrographic and Geochemical Evidence

  • Merve ÖzyurtEmail author
  • Ihsan S. Al-Aasm
  • M. Ziya Kirmaci
Conference paper
Part of the Advances in Science, Technology & Innovation book series (ASTI)


Upper Jurassic-lower Cretaceous Berdiga Formation crops out extensively in NE Turkey. The host carbonates at Eski Gümüşhane section are pervasively dolomitized by fabric-destructive and fabric-preserving replacive dolomites (RD). These dolomites are Ca-rich and non-stoichiometric (Ca56-58Mg42-44). They have highly variable but low δ18O (−11.38 to −4.05‰ V-PDB) and δ13C (0.69 to 3.13‰V-PDB) values, radiogenic 87Sr/86Sr ratios (0.70753 to 0.70884), extremely high Fe (2727–21053 ppm) and Mn (1548–27726 ppm) contents. Microcrystalline quartz cement, dolomite cement and the scattered euhedral pyrite minerals (average 5 μm) are also observed in the dissolution porosity of replacive dolomites. This study demonstrates that these carbonates have undergone a complex diagenetic history from shallow to deep burial associated with syn-sedimentary extensional tectonic activity during the Albian–Aptian and later with the hydrothermal emplacement of the polymetallic mineralization during the Eocene.


Diagenesis Carbonates Berdiga Formation NE turkey 



The authors thank Karadeniz Technical University (Project no: FBA-2015-5160) and TUBİTAK (Project no: 115Y005, ÇAYDAG and International PhD Research Scholarship Program-2214-A-BIDEP) for their financial support. ISA acknowledge the support from NSERC.


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© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Merve Özyurt
    • 1
    • 2
    Email author
  • Ihsan S. Al-Aasm
    • 2
  • M. Ziya Kirmaci
    • 1
  1. 1.Department of Geological EngineeringKaradeniz Technical UniversityTrabzonTurkey
  2. 2.Department of Earth and Environmental SciencesUniversity of WindsorWindsorCanada

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