Abstract
A grid of high-resolution multi-channel seismic reflection profiles allows the detailed mapping of the Kozan Fault zone in the Cilicia and Adana basins. The zone is delineated by an arcuate zone consisting of several ENE-WSW and NNE-SSW striking, closely-spaced high-angle extensional faults which define an ~. 300. km long and 15-20. km-wide "lazy-S" shaped structure along the southeastern fringes of the Taurus Mountain and along the northwestern margins of the Cilicia and Adana basins. In the Cilicia Basin the zone consists of several high-angle faults which exhibit small dip separations on the M-reflector and have tip points situated mainly in the lower and middle portion of the Pliocene-Quaternary succession. In the Adana Basin a family of northeast-striking and southeast dipping extensional faults occurs along the western and northwestern margin of the basin. The faults cut down with relatively steep dip into the ~. 700. ms thick Tortonian and older Miocene successions. Multi-channel seismic reflection profiles show that three prominent seismic markers divide the uppermost Messinian-Recent successions in the Cilicia and Adana basins into three subunits: the uppermost Messinian-Lower Pliocene subunit 1C between the M- and A-reflectors, the Upper Pliocene subunit 1B between the A- and P-reflectors and the Quaternary subunit 1A between the P-reflector and the seafloor. Prominent delta lobes are identified in the seismic profiles that are correlated with the ancestral Göksu River. Isopach maps constructed using depth-converted seismic reflection profiles show clear temporal and spatial variations of the delta lobes of the Göksu River during the latest Messinian-Recent. The uppermost Messinian-Lower Pliocene delta lobe is situated furthest to the northeast whereas the youngest Quaternary lobe is situated furthest to the southwest, with 20-35. km displacement along a northeast-southwest line, which suggests a conservative estimate of 0.43-0.75. cm/yr sinistral slip for the Kozan Fault zone.
| Original language | English |
|---|---|
| Pages (from-to) | 22-43 |
| Number of pages | 22 |
| Journal | Tectonophysics |
| Volume | 622 |
| DOIs | |
| Publication status | Published - 21 May 2014 |
Funding
We thank the officers, crew and scientific personnel ( http://web.deu.edu.tr/seislab/ ) of the RV Koca Piri Reis for their assistance in data acquisition. We also would like to thank Hydroscience Technologies Inc. for their valuable technical support during the data acquisition. Special thanks are extended to the Turkish Petroleum Corporation for kindly providing paper copies of their multi-channel seismic profiles and well information. We acknowledge research funds from the Natural Sciences and Engineering Research Council of Canada (NSERC) to Aksu, Hall and Hiscott, and contributions from the Office of the Vice-President Research at Memorial University of Newfoundland. We thank S. Gürçay of the Institute of Marine Sciences and Technology, Dokuz Eylül University for his assistance in data acquisition. Seismic data were processed at Memorial University of Newfoundland, using the ProMAX© software donated by Landmark Graphics.
| Funders | Funder number |
|---|---|
| Natural Sciences and Engineering Research Council of Canada | |
| Memorial University of Newfoundland |
Keywords
- Adana basin
- Basin evolution
- Cilicia basin
- Kozan Fault zone
- Tectonics