- 期刊
ORGANIC GEOCHEMICAL CHARACTERISTICS OF MIOCENE OIL SHALE DEPOSITS IN THE ESKİŞEHİR BASIN, WESTERN ANATOLIA, TURKEY
並列摘要
In the Eskişehir Basin, western Turkey, oil shale occurs in alternation with claystone, siltstone, conglomerate and coal (lignite) seams in lacustrine deposits of Early-Middle Miocene age. The thickness of oil shale seams drilled during the study varies between 20 and 30 m. Organic geochemical features of the shale were evaluated using TOC, pyrolysis, GC and GC-MS analyses. The Eskişehir oil shale is characterized by very high TOC contents (6.32-37.15 wt%), Hydrogen Index (HI = 392-777 mg HC/g TOC), Potential Yield (PY = 35.50-159.32 mg HC/g rock) and very low Oxygen Index (OI = 13-92 mg CO_2/g TOC) values. Organic matter in the studied oil shale is of Type II kerogen and shows S_2/S_3 ratio values between 5.49 and 56.79 and low T_(max) (421-435 °C ) and PI (0.01-0.05) values. Low Pr/Ph ratio of oil shale (0.17-0.96) is indicative of anoxic conditions. Dominant steranes are either C_(27) or C_(28). Normal steranes are more abundant than iso- and diasteranes and diasterane abundances as well as 20S/(20S + 20R) and ββ/(ββ+αα) sterane ratios are low. While oil shale samples in general have low tricyclic terpane (C_(19)-C_(29)) abundance, their C_(30) (R + S) tricyclic terpane content is high. For all the oil shale samples studied C_(29)/C_(30) hopane, C_(31)R homohopane/hopane and moretane/hopane ratios are high and Ts/(Ts + Tm) and C_(29)Ts/(C_(29)Ts + C_(29)H) ratios are low. 22S homohopanes are recorded in lower quantities in comparison to 22R epimers and the 22S/(22S + 22R) homohopane ratio is low.
延伸閱讀
- GAJICA, G., SAJNOVIĆ, A., STOJANOVIĆ, K., KOSTIĆ, A., SLIPPER, I., ANTONIJEVIĆ, M., NYTOFT, H. P., & JOVANČIĆEVIĆ, B. (2017). ORGANIC GEOCHEMICAL STUDY OF THE UPPER LAYER OF ALEKSINAC OIL SHALE IN THE DUBRAVA BLOCK, SERBIA. Oil Shale, 34(3), 197-218. https://doi.org/10.3176/oil.2017.3.01
- MENG, Q., LIU, Z., SUN, P., XU, Y., LI, F., BAI, Y., XIE, W., DENG, S., SONG, S., WANG, K., & XU, C. (2018). CHARACTERISTICS AND ACCUMULATION OF MIDDLE JURASSIC OIL SHALE IN THE YUQIA AREA, NORTHERN QAIDAM BASIN, NORTHWEST CHINA. Oil Shale, 35(1), 1-25. https://doi.org/10.3176/oil.2018.1.01
- Bozcu, A. (2015). SOURCE ROCK POTENTIAL OF LOWER-MIDDLE MIOCENE LACUSTRINE DEPOSITS: EXAMPLE OF THE KÜÇÜKKUYU FORMATION, NW TURKEY. Oil Shale, 32(4), 313-334. https://doi.org/10.3176/oil.2015.4.03
- Gülbay, R. K., & Korkmaz, S. (2008). Organic Geochemistry, Depositional Environment and Hydrocarbon Potential of the Tertiary Oil Shale Deposits in NW Anatolia, Turkey. Oil Shale, 25(4), 444-464. https://www.airitilibrary.com/Article/Detail?DocID=17367492-200812-201011020029-201011020029-444-464
- Gülbay, R. K. (2007). Rhenium and Molybdenum in Tertiary Oil Shale Deposits in Northwesthern Anatolia, Turkey. Oil Shale, 24(3), 450-464. https://www.airitilibrary.com/Article/Detail?DocID=17367492-200709-201011020022-201011020022-450-464