Abstract
In this study, geochemical and biogeochemical investigations by means of organic carbon (Corg) and element chemistry were performed on deposits in the Miocene Himmeto lu basin which is represented by various depositional characteristics. As a result of Corg and element analyses conducted on more than 50 samples, precious and rare metals such as Ag, Hg, Bi, In and U were found to have wide accumulation ranges. The average concentrations of these metals in bitumen-rich sediments in the area are 0.9, 1.17, 0.9, 0.85 and 10.0 ppm, respectively. Enrichment coefficients (EC) of these metals are 12.86, 58.5, 4.5, 14.2 and 3.7 times greater than the earth crust. However, in some sediment units enrichment coefficients are much higher such as 34.3 for Ag, 100 for Hg, 13.3 for Bi, 33.3 for In and 12.44 for U. The average Corg values of sediments studied is 37.21%. Except for two samples (2.78 and 2.65%), Corg values range from 11.09 to 80.03 wt % indicating that this part of Miocene basin has unique paleobionomic and paleogeographic characteristics. The main source of OM is algal/amorphous Type I and also Type II kerogens consisting of vegetal sources such as spore-pollen and leaf cuticle. Results show that region under investigation is important by means of energy and metal sources.
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Aliyev, S.A., Sari, A. Biogeochemical properties of bituminous deposits in the Miocene Himmetoǧlu basin (Turkey). Geochem. Int. 49, 170–180 (2011). https://doi.org/10.1134/S0016702911020029
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DOI: https://doi.org/10.1134/S0016702911020029