The major purpose of this study is to evaluate the paleoenvironmental and
paleoclimatological conditions during the Middle Miocene-Early Pliocene in Kalecik-Ankara
by using mineralogical and geochemical proxies from Hanç / ili Formation.
To achieve a high-resolution paleoclimate data, 2 stratigraphic sectioning and 1 continous
core drilling were examined. Field studies were followed by analytical techniques on the
selected representative samples. The mineralogical compositions of the bulk samples and
the minerals of the clay fractions were determined by X-ray diffractometer. Scanning
electron microscopic analyses were also carried on the specific samples which have the
potential to define the important microstructural units. The major and trace elemental
compositions were determined by X-ray fluoresence spectrometer. Additionally, the stable
isotope compositions of the samples selected from the continous core drilling on Hanç / ili
formation were among the major proxies to gather a paleoenvironmental and
paleoclimatrological approach.
All the proxies employed for this study clearly indicate that mineralogical and geochemical
signatures are consistent with each other and can be used for paleoclimatic interpretations.
The stable isotope values point that C4 plants were dominant during the deposition of
Hanç / ili Formation, while evaporation caused the development of alkaline environment which
is seasonally dry with depositional temperature approximately between 25-30° / C. During
deposition, lava flowand tuff were deposited due to the volcanic activity in the vicinity of the
lake. Based on this volcanism, economical bentonite deposits were originated. The lake at
which the Hanç / ili formation was deposited, completed its development in a time to time
silicate rich and salty-alkaline anvironment.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12615693/index.pdf |
| Date | 01 January 2013 |
| Creators | Aker, Serdar |
| Contributors | Turkmenoglu, Gunal |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | Ph.D. Thesis |
| Format | text/pdf |
| Rights | Access forbidden for 1 year |
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