Full Length Research Paper
Mesozoic carbonates are widespread in the Antalya region of south-west Turkey and have been studied in the outcrop. Mesozoic units include a Jurrasic/Cretaceous sequence that comprises, from bottom to top, the following stratigraphic sequence: BeydaÄŸlarÄ± Formation (Jurrasic-Cretaceous) and ÇiÄŸdemtepe Formation (Senonian). Detailed data from thick Mesozoic carbonates (BeydaÄŸlarÄ± and ÇiÄŸdemtepe Formations) made it possible to construct an organic facies framework using different zonations. Organic matter is composed predominantly of amorphous material, with a minor contribution of allochthonous terrestrial material. Kerogen in the deposite is primarily type II/III, as indicated by organic petrographic observations and Rock-Eval data. Total organic carbon content (TOC) of this deposit is less than 0.5% in different zonations of the BeydaÄŸlarÄ± and ÇiÄŸdemtepe Formations. Tmax values vary between 332 and 535°C, confirming the increase in maturation trends indicated by Rock-Eval data. Both organic petrographic and geochemical maturation parameters place the Mesozoic carbonates of the western Taurides (Antalya-SW Turkey) region within C-CD organic facies. According to this, the different types of kerogen observed fall dominantly in the C facies, with a poor capacity for liquid hydrocarbon generation. When seen in Mesozoic BeydaÄŸlarÄ± carbonates, the organic matter is highly oxidized.
Key words: Western Taurus, organic facies, source rock, Mesozoic.
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