Kürnüç/Göynük-Bolu Sahasi Alt Eosen Bi̇tümlü Kayaçlarinin Depolanma Ortami Ve Organi̇k Jeoki̇myasal Karakteri̇sti̇kleri̇

Abstract

In this study, dark gray and dark brown colored, organic-carbon rich bituminous rocks (bituminous marl and bituminous shale) exposing around the Kürnüç area (Göynük, Bolu) are investigated by means of organic geochemical characteristics. In this respect, rock lithologies, depositional environments, rock source potential, kerogen and organic maturity types and hydrocarbon generation potentials of bituminous rocks were determined. For this reason, pyrolysis (Rock Eval-VI) analysis, gas chromatography (GC) and gas chromatography-mass spectrometer (GC-MS) analyses were carried out. In addition, spore color index (SCI) was determined with organic petrographic method and stable carbon analysis (δ 13 C) of the samples were also conducted. Lithology of the studied samples is of clastic source and the depositional environment is a lagoon with a partial connection to the sea. In bituminous rocks with excellent source rock potential TOC values are in the range of 2.52-8.38 wt % (average 6.08 wt %). With the exception of two samples (Type II) kerogen type of all samples is Type I. According to pyrolysis, GC and GC-MS organic maturity results, all the samples are in immature stage. Organic geochemical data indicate that bituminous rocks have an excellent oil generation potential and there is no organic contamination.

Element characteristics of oil shales and factors controlling the paleo-sedimentary conditions of organic matter, Çeltek Formation oil shales, Sorgun-Yozgat, Turkey

“…There are several studies regarding the redox conditions during oil shale deposition and the relation between TOC content and redox-sensitive trace elements (Vine and Tourtelot, 1970;Holland, 1984;Robl and Barron, 1987;Özlük, 2010;Koca et al, 2010;Sarı et al, 2010;Koca, 2011;Yavuz Pehlivanlı, 2011;Sarı and Koca, 2012;Yavuz Pehlivanlı et al, 2013;Koralay and Sarı, 2013;Sarı et al, 2016).…”