DATE2016-05-31 11:23:00
AUTHORSSena Akçer-Ön (1), Zeki Bora Ön (1), Namik Çagatay (2), Mehmet Sakinç (3), Cahit Helvaci (4), İbrahim Gündogan (4), Kürsad Kadir Eris (2), Dursun Acar (2), Serkan Akkiraz (5), Ümmühan Sancar (2), Javier Garcia Veigas (6), Yesim Büyükmeriç (7), Iliya Bauchi Danladi (1), Rana Salihoglu (1), Sabine Wulf (8,9), Oona Appelt (11), Ömer Lutfi Sen (3), Mehmet Özdogan (10)
  1. Mugla Sitki Kocman University, Geological Engineering Dept. Mugla (Turkey)
  2. Istanbul Technical University, Emcol And Geological Engineering Dept Istanbul (Turkey)
  3. Istanbul Technical University, Avrasya Yer Institute Of Earth Sciences Istanbul (Turkey)
  4. Dokuz Eylül University, Geological Engineering Dept Izmir (Turkey)
  5. Dumlupinar University, Geological Dept. Kütahya (Turkey)
  6. Universitat Barcelona, Geologia Sedimentaria Barcelona (Spain)
  7. Bülent Ecevit University, Geological Engineering Dept Zonguldak (Turkey)
  8. Senckenberg Research Institute And Natural History Museum, Evolution And Climate Frankfurt (Germany)
  9. Heidelberg University, Institute Of Earth Sciences Heidelberg (Germany)
  10. Istanbul University, Archaeology Dept. Istanbul (Turkey)
  11. Helmholtz Centre Potsdam, Gfz German Research Centre For Geosciences Potsdam (Germany)
ABSTRACTAcigöl (Denizli), in the Aegean Region, is a tectonic, salty, playa lake that has high values of Total Dissolved Solids (TDS) due to evaporation. The lake of Miocene-Pliocene age, is located at a NW-SE trending graben and surrounded by alluvium. The area is mostly covered by limestones, clastic sediments and ophiolites. Lake Acigöl is located at 842 m a.s.l., and the maximum water level, which seasonally fluctuates, is 3 m. The annual average air temperature changes between 3.3°C - 24.4°C and the annual average precipitation is 400 mm, while evapotranspiration is 754 mm in this region. In order to determine the thickness and lithology of the lake sediments, the sodium sulfate-producing companies drilled and recovered a 600 m long core in 2009. In this study we used the upper 170 m of this core to understand the climatic and environmental changes by scanning XRF elements and Magnetic Susceptibility (MS) at 3 mm resolution, and analyzed TOC/TIC content (wt %), diatom, pollen, mollusks and stable oxygen and carbon isotopes (ostracods) at 100 cm resolution. XRD, SEM, major and trace elements are also analyzed from different levels of the core. Chemical identification and independent dating of a visible tephra layer at 59 m depth are in progress. We chose Cl, K, Ca,Ti, Mn, Fe, Ni, Br, Rb and Sr elements of XRF results in order to implement Fast Independent Component Analysis (FastICA). The results of the analysis has been tuned to the synthetic Greenland δ18O (Barker et al., 2011) and stacked benthic foraminifer δ18O curves (Lisiecki et al., 2005) to construct an age model by Analy Series 2.0 software. The preliminary results of the study suggest that the upper 170 m of Lake Acigöl core covers the last 700 ka BP and Marine Isotope Stages (MIS) 1 to 18. In order to the tuned age, 1 in 55 resampled data give 1000 years resolution. The project is supported by the Scientific and Technological Research Council of Turkey (TUBITAK) project no. 113Y408.