Outer Cilicia Basin – A piggy back basin developed in an intramontane setting following the partitioning of a large ancestral Miocene basin across the northeastern Mediterranean

A. E. Aksu*, C. Yaltırak, J. Hall

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Multichannel seismic reflection profiles show that the Outer Cilicia Basin evolved mainly during the uppermost Messinian–Quaternary as an asymmetric piggyback basin on the hanging wall of the large south-verging Kyrenia thrust culmination, following the partitioning of the much larger Miocene basin. A major north-verging backthrust and several similarly-verging smaller splays developed during the deposition of the uppermost Messinian–Quaternary succession, elevating the southern sector of the Outer Cilicia Basin ~250–500 ms above the central portion of the basin. An E–W trending zone characterized by 6–9 positive flower structures which are cored by the Messinian evaporite successions developed immediately north of the backthrust. Two prominent broadly E–W striking extensional fault zones define the tectonic framework of the north and south margins of the basin: (a) the Zafer–Kormakiti zone in the south with 5–6 internally parallel and invariably north-dipping large listric extensional faults developed immediately north of the Kyrenia Range and (b) the Anamur–Silifke zone in the north with 4–8 internally parallel and steeply north- and south-dipping planar faults defining a series of shore-parallel horst and graben structures developed immediately south of the Central Taurus Mountains. The Zafer–Kormakiti and the Anamur–Silifke fault zones are shown to be the westward extensions of the uppermost Messinian–Quaternary Misis–Kyrenia and Kozan fault zones, respectively. The tectonic framework of the Miocene successions across the Mut Basin delineated using >310 strike and dip measurements extracted from 1:25,000–1:100,000 maps supplemented by >1200 strike and dip determinations using the rule of Vs and construction of structure contours. These data revealed two distinct regional folds, where the anticlinal and synclinal axes are oriented WNW–ESE and NE–SW directions. Geological cross sections constructed suggest that the folds are likely cored by broadly southerly verging deep-seated blind thrusts.

Original languageEnglish
Article number228952
JournalTectonophysics
Volume814
DOIs
Publication statusPublished - 5 Sept 2021

Bibliographical note

Publisher Copyright:
© 2021 Elsevier B.V.

Funding

We thank the officers and crew of the RV Koca Piri Reis, particularly the former Captains M. Özsaygılı and K. Dursun and the former Chief Engineers B. Nuriler and Ö. Çubuk for their invaluable assistance during the 1991, 1992, 2001 and 2008 geophysical operations. We further thank Drs. D. Yaşar and G. Çifçi of the Institute of Marine Sciences and Technology, Dokuz Eylül University for their roles in facilitating these cruises. Special thanks are extended to the Turkish Petroleum Corporation for kindly providing their multichannel seismic profiles and well data. We acknowledge research and shiptime funds from the Natural Sciences and Engineering Research Council of Canada (NSERC) to Aksu and Hall, shiptime funds from the Scientific and Technological Research Council of Turkey (TÜBİTAK Projet No ÇAYDAG 107Y005), and contributions from the Office of the Vice-President Research and Dr. Richard Haedrich, the former Director of the Ocean Sciences Centre at Memorial University of Newfoundland. Numerous discussions with Dr. T. Calon greatly improved the manuscript. We further acknowledge the assistance in data processing by S. Deemer and during thesis studies at Memorial University of Newfoundland by İ. İşler, S. Mansfield, S. Walsh-Kennedy and B. Kurtboğan. Finally, we extend special thanks to P. Bruce ( CREAIT , Memorial University of Newfoundland) and M. Şahin (Istanbul Technical University) for their assistance in data management. We thank the officers and crew of the RV Koca Piri Reis, particularly the former Captains M. ?zsayg?l? and K. Dursun and the former Chief Engineers B. Nuriler and ?. ?ubuk for their invaluable assistance during the 1991, 1992, 2001 and 2008 geophysical operations. We further thank Drs. D. Ya?ar and G. ?if?i of the Institute of Marine Sciences and Technology, Dokuz Eyl?l University for their roles in facilitating these cruises. Special thanks are extended to the Turkish Petroleum Corporation for kindly providing their multichannel seismic profiles and well data. We acknowledge research and shiptime funds from the Natural Sciences and Engineering Research Council of Canada (NSERC) to Aksu and Hall, shiptime funds from the Scientific and Technological Research Council of Turkey (T?B?TAK Projet No ?AYDAG 107Y005), and contributions from the Office of the Vice-President Research and Dr. Richard Haedrich, the former Director of the Ocean Sciences Centre at Memorial University of Newfoundland. Numerous discussions with Dr. T. Calon greatly improved the manuscript. We further acknowledge the assistance in data processing by S. Deemer and during thesis studies at Memorial University of Newfoundland by ?. ??ler, S. Mansfield, S. Walsh-Kennedy and B. Kurtbo?an. Finally, we extend special thanks to P. Bruce (CREAIT, Memorial University of Newfoundland) and M. ?ahin (Istanbul Technical University) for their assistance in data management.

FundersFunder number
Institute of Marine Sciences and Technology
Turkish Petroleum Corporation
TÜBİTAK
Natural Sciences and Engineering Research Council of Canada
Türkiye Bilimsel ve Teknolojik Araştirma KurumuÇAYDAG 107Y005
Memorial University of Newfoundland
Istanbul Teknik Üniversitesi

    Keywords

    • Central Taurus Mountains
    • Eastern Mediterranean
    • Mut Basin
    • Outer Cilicia Basin
    • Regional tectonics
    • Seismic stratigraphy
    • Strike-slip faults

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