Please use this identifier to cite or link to this item: 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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