Organic geochemistry and paleoclimate conditions of the early-middle miocene coals at the ekizköy (Muğla-Milas) [Ekizköy (Muğla-Milas) erken-orta miyosen kömürlerinin organik jeokimyasi ve paleoiklim şartlari]

In this study,organic geochemistry,depositional environments and paleo-climatic conditions of ekizköy coals located southeast of muğla (milas) were investigated. the average values of total organic carbon content (toc) of the coal (46.24 %),hi (152.88 mghk/gtoc) and oi (76.63 mgco2/gtoc) show that the depositional environment of peat deposits is suboxic. according to hi-tmax,s2-toc classification diagrams,the organic matter is composed of type ii and type iii kerogen. in gas chromatographs,n-alkanes with high,mostly single-numbered carbons are dominated and they are associated with a slight algal contribution. cpi22-30 is calculated as 2.8,and 2.4. cpi26-28 is calculated as 3.2,and 2.8. terrigenous/ aquatic ratio (tarhc) is very high,computed as 13 and 22. these values indicate a dominance of highcarbon numbered n-alkanes,meaning the presence of terrestrial organic matter. the cpi,tarhc,acl,qwood/grass,qwood/plant ve qgrass/plant values of the sample m-4 show that woody plants were the dominant vegetation in the peat mire and the climate was relatively wet and subtrophic. however,these values of the sample m-8 show warmer climate,higher water table and also contain further aquatic vegetation than the values of m-4 sample. © 2016,tmmob - jeoloji muhendisleri odasi. all rights reserved.