f Rare Earth Elements Enrichments of Organic Matter Rich Rocks in the South of Dağşeyhler Village

Rare earth element content of samples which are collected from the study area were determined by ICP-MS method. REE distrubitions are as follows, claystone:63.94-176.41 (120.17) ppm, carbonaceous claystone 43.19-85.97 (63.68) ppm, marl:2.96-74.25 (33.80) ppm and oil shale:26.46-79.28 (50.68) ppm. REE contents show a decreasing trend from claystone to marl samples. This situation can indicate that REEs were transported with clay minerals to the depositional environment. REE contents of oil shale are higher than marl, however lower than claystone. LREE/HREE ratios relatively are high in all lithologies. These ratios are as follows, claystone: 4.14, carbonaceous claystone: 3.24 marl: 2.87 and oil shale: 2.83. This situation indicates that REEs were transported with clay minerals to depositional environment and clay minerals control the concentrations of the light rare earth elements. When REE contents of all samples normalized to UCC and PASS values, weak Ce anomalies and positive Eu anomalies were determined in all samples. Weak Ce anomaly indicates partially lower oxygen conditions, whereas positive Eu anomaly indicates presence of Ca-bearing minerals.