Organic geochemical and isotopic (C and N) characterization of carbonaceous rocks of the Denizli Area, Western Turkey

Autor: Koralay, Demet Banu
Jazyk: angličtina
Rok vydání: 2014
Předmět:
Rocks
Organic matter content
paleoenvironment
carbon isotope
Turkey
Phytane
Mineralogy
isotopic composition
organic geochemistry
Hayrettin formation
Total Organic Carbon
Biomarker distributions
Carbonaceous rock
Suboxic environment
Sedimentary depositional environment
chemistry.chemical_compound
Organic compounds
Organic matter
Coal
Deposition
Vitrinite reflectance
depositional environment
organic matter
chemistry.chemical_classification
Maturity (geology)
Total organic carbon
δ13C
business.industry
Pristane
organic carbon
carbonaceous rock
hayrettin Formation
Peat
Biological materials
Maturity parameters
Biogeochemistry
Geotechnical Engineering and Engineering Geology
Fuel Technology
lignite
nitrogen isotope
chemistry
Environmental chemistry
Denizli [Turkey]
biomarker
biomarkers
delta C-13
delta N-15
business
Geology
Biomarkers
Popis: The sediments under examination constitute part of the Hayrettin Formation expanding to the northwest of Augol (Denizli/Turkey) containing coal. The aims of this study are to assess the organic matter content (Corg, %), type, maturity and established paleoenvironment of deposition based primarily on Rock-Eval pyrolysis data, biomarker distributions and delta C-13, delta N-15 values. The total organic carbon (Corg, %) contents of carbonaceous rocks range from 0.21% to 39.61%, and hydrogen index (HI) values are between 25 and 174 mg HC/g rock. The samples studied contain type III organic matter (OM). T-max values for the Hayrettin carbonaceous rocks range from 400 to 437 degrees C. Vitrinite reflectance values (Ro) are between 0.26% and 0.36%, and these values reveal that the carbonaceous rocks are at peat-lignite coal stage. On the basis of biomarker maturity parameters, these rocks are immature. The high pristane/phytane (Pr/Ph) ratios (0.79-7.85), low C-35 homohopane index (0.02-0.07) indicates that carbonaceous rocks were deposited in a suboxic environment. delta C-13 (range from -26.06 parts per thousand to -23.88 parts per thousand) and delta N-15 (range from 2.63 parts per thousand to 3.33 parts per thousand) values, high concentrations of C-29 steranes (C29 > C28 > C27) and C-26/C-25 tricyclic terpane ratios (1.00 and 1.18) indicate that these carbonaceous rocks formed in a peat-swamp environment. (C) 2014 Elsevier B.V. All rights reserved.
Databáze: OpenAIRE
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