The purpose of this study is to investigate the Upper Tournaisian substage within the Carboniferous carbonate deposits of the Aladag Unit in the Hadim region (Central Taurides) based on foraminiferal diversity and to study the meter scale
cyclicity in order to explain the sequence stratigraphic evolution of the carbonate
succession.
In this study, a 27.01 m thick stratigraphic section consisting of limestones and
shales was measured and 89 samples, collected along this section, were analyzed.
Micropaleontological analyses are based on benthic foraminifera. According to
the benthic foraminiferal assemblages, two biozones were identified as Zone Ut1
and Zone Ut2 within the Upper Tournaisian. Zone Ut1 is characterized by a poor
foraminiferal assemblage while the Zone Ut2 consists of a diverse Upper
Tournaisian foraminiferal fauna.
In order to construct a sequence stratigraphic framework and appreciate
depositional environmental changes, microfacies studies were carried out. Seven
microfacies types were recognized and depending on the stacking patterns of these
microfacies types, two fundamental types of cycles, A and B, were identified.
Through the measured section, twenty-five shallowing-upward meter scale cycles and two sequence boundaries were determined. Quantitative analysis of benthic
foraminifera was used to demonstrate the biological response to cyclicity. Since
foraminifers are very sensitive to sea level changes, the abundance of benthic
foraminifera displays a good response to sedimentary cyclicity.
In order to apply a worldwide sequence stratigraphic correlation, the sequence
boundaries and the meter scale cycles of this study were compared with those
described in South China and Western European platform and the Moscow
Syneclise. An Early Tournaisian transgression was followed by a major fall in
relative sea level during the Late Tournaisian. Two sequence boundaries
recognized in the measured section correspond to global sea level falls in the Late
Tournaisian.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/3/12611400/index.pdf |
| Date | 01 December 2009 |
| Creators | Dinc, Aksel Tugba |
| Contributors | Altiner, Demir |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for public access |
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