Sr Isotopic Evaluation of the Adana Basin (Southern anatolia) and its Geological/Stratigraphical Implications


Akıncı A. C.

7th International Science and Engineering Congress, Antalya, Turkey, 25 - 28 October 2022, vol.1, no.32, pp.97

  • Publication Type: Conference Paper / Summary Text
  • Volume: 1
  • City: Antalya
  • Country: Turkey
  • Page Numbers: pp.97
  • Çukurova University Affiliated: Yes

Abstract

The Adana Basin is located very close to the junction of the African, Arabian, and Anatolian plates and plays a key role in understanding the regional geological history. This study documents the first 87Sr/86Sr data and its geologic implications for the whole units in the Neogene Adana Basin. In this study, fifteen systematically collected samples from six different formations of the Adana Basin subjected to 87Sr/86Sr analysis. According to the 87Sr/86Sr analysis results, ages of Serravallian – Tortonian for the Kaplankaya and relevant Karaisalı formations, early-middle Miocene for the Cingöz Formation, early-middle Miocene for the Güvenç Formation, Tortonian-Messinian for the Tırtar Formation, and Messinian for the Kuzgun Formation were assigned. As some of the recorded 87Sr/86Sr results has contradicted to the regional literature, the study also evaluates possible geological factors causing the deviations in detail along with some alternative approaches. Deviations observed in the Cingöz and Güvenç formations are generally associated with diagenetic alteration and the units being rich in detritus. The 87Sr/86Sr deviations obtained in the Kuzgun and Kaplankaya formations are attributed to several causes: short-term sea-level changes in the basin, continental run-off, terrestrial feeding/riverine input and volcanic activity during the late Tortonian-Messinian period. New field observations and 87Sr/86Sr results allowed to distinguish different reef carbonates which have similar lithology (Karaisalı/Tırtar Formation), suggesting that extensive reefs built up by multi short-term phases and the sea receded from the basin gradually during the Late Miocene.