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https://hdl.handle.net/11499/36874
Title: | Deposition characteristics of pliocene coals in the denizli region (SW Turkey) via organic petrography, geochemistry, and stable isotope composition | Authors: | Koralay, Demet Banu | Keywords: | Biomarkers Maceral association Organic geochemistry Palynology Pliocene coals (denizli basin) Stable isotopes Algae Coal industry Deposition Gas industry Groundwater Groundwater geochemistry Isotopes Organic carbon Petroleum industry Reflection Scanning electron microscopy Tissue Vegetation X ray diffraction analysis Deposition characteristics Depositional environment Geochemical properties Organic petrography Reflectance values Tissue preservation Total Organic Carbon Vegetation index Coal |
Publisher: | Elsevier B.V. | Abstract: | The objective of this study is to identify and evaluate the organic geochemical properties, paleo vegetation, and paleo depositional environment of coals in Denizli (SW Turkey). Organic geochemical and petrographic investigations, scanning electron microscopy, X-ray diffractometry, and palynological and stable isotope (?2H, ?13C, ?15N, ?18O and ?34S) investigations have been performed. Coal, clayey coal, and coaly claystone samples from the study area have gas and oil production potential according to their total organic carbon (0.59–48.30 wt%), hydrogen index (56–286 mg HC/g TOC), oxygen index (30–121 mg CO2/g TOC) and S2/S3 (0.47–9.59) values. Dominant maceral assemblages included huminites and low amounts of liptinite group macerals. Tissue preservation index (0.39–5.13), gelification index (4.11–96.83), groundwater index (0.40–8.77) and vegetation index (0.49–42.67) parameters indicate a limno-telmatic environment and increased woody tissue. Mean random huminite/vitrinite reflectance values (ranging from 0.23 to 0.41 %Ro) denote lignite and sub-bituminous C and B ranked coals. Carpinus, Alnus, Zelkova, Platanus-Salix, Carya, and Ostrya were found through palynologic investigations. In addition, freshwater algae Botryococcus was detected in coal samples from Denizli. ?13C, ?15N values and C/N ratios indicated a terrestrial C3 ecosystem. Some sterane and tricyclic terpane ratios and aromatic biomarkers have shown that high plant input, immature organic matter and oxic-suboxic conditions are predominant in the depositional environment. © 2020 Elsevier B.V. | URI: | https://hdl.handle.net/11499/36874 https://doi.org/10.1016/j.jngse.2020.103619 |
ISSN: | 1875-5100 |
Appears in Collections: | Mühendislik Fakültesi Koleksiyonu Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection |
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