Source Rock Potential of Lower-Middle Miocene Lacustrine Deposits: Example of the Küçükkuyu Formation, Nw Turkey

BOZCU, A

doi:10.3176/oil.2015.4.03

Cited by 4 publications

(10 citation statements)

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“…In thin section it consists of fine-grained components and has vitric tuff characteristics. Quartz-plagioclase minerals and ferrous alteration are observed (Bozcu, 2015). The Adatepe sandstone occurs at the upper level of the formation.…”

Section: Stratigraphy Of the Küçükkuyu Formationmentioning

confidence: 99%

“…Sedimentary structures, including planar parallel stratification, lamination, grading, spheroidal nodules, ripple marks, slump structures, and mud dykes, are common in the formation (Bozcu, 2015). The formation is overlain unconformably by the İlyasbaşı Formation (Saka, 1979).…”

Section: Stratigraphy Of the Küçükkuyu Formationmentioning

confidence: 99%

“…The unit starts with sandstone-shale alternation at lower levels, passing into sandstone with pebbles. The dominant lithology is tuffite and carbonate-cemented sandstone (Bozcu, 2015).…”

Section: Stratigraphy Of the Küçükkuyu Formationmentioning

confidence: 99%

“…The depositional environment of the unit was braided-river and/or steeply dipping alluvial fan (Beccaletto, 2004;Çiftçi et al, 2004). Lateral thickness change and geometry of the unit in a section near Kızılyar village reflects sedimentation as fan sediments (Bozcu, 2015).…”

Section: Stratigraphy Of the Küçükkuyu Formationmentioning

confidence: 99%

“…The stratigraphy of the formation is studied with the help of detailed lithological columns established from key areas in the north (Bozcu et al, 2014;Bozcu, 2015) and in the south (Aytepe, 2010;Bozcu et al, 2014). The Küçükkuyu Formation (Saka, 1979), which consists of alternating bituminous shale and sandstone, crops out extensively around the Edremit Gulf (Figures 1-3) The formation is Lower-Middle Miocene in age (İnci, 1984;Kesgin, 2001;Çiftçi et al, 2004).…”

Section: Stratigraphy Of the Küçükkuyu Formationmentioning

confidence: 99%

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Organic geochemical characteristics and depositional environment of Lower-Middle Miocene Küçükkuyu Formation, Edremit Gulf, NW Turkey

Bozcu¹

2017

Turkish J Earth Sci

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The Lower-Middle Miocene Küçükkuyu Formation crops out extensively in the Edremit Gulf area (NW Turkey). In this study, shale samples from this unit were investigated to evaluate source rock characteristics, depositional conditions, and hydrocarbon potential. Outcrop samples of the Küçükkuyu Formation were taken from different locations and analyzed by Rock-Eval pyrolysis, vitrinite reflectance (R o ), stable carbon isotope (δ 13 C), total sulfur (TS), gas chromatography (GC), and gas chromatography-mass spectrometry (GC-MS). The total organic carbon (TOC) values range from 0.23 to 6.1 wt.% with an average of 1.76 wt.% for the northern samples and 0.24 to 2.82 wt.% with an average of 1.66 wt.% for the southern samples around the Edremit Gulf. Hydrogen index (HI) values were up to 606 and 712 mg HC/g TOC in the north and south of the gulf, respectively. Organic matter type in the formation consists predominantly of Type II and III kerogen with a minor component of Type I kerogen. Tmax values ranging from 414 to 496 °C in the north and 423 to 446 °C in the south of the gulf indicate that most samples are at the beginning of the oil generation window and are thermally immature or early-mid-mature. Vitrinite reflectance (R o ) and biomarker maturity parameters support this result. Based on geological observations, biomarker distributions, and TOC/TS ratios, the Küçükkuyu Formation was deposited in a freshwater to slightly brackish water environment under anoxic-suboxic conditions with organic matter input from aquatic organisms and from terrestrial higher plants. According to Rock-Eval pyrolysis data, the Küçükkuyu Formation mostly has medium to good hydrocarbongeneration potential. However, as these potential source rocks are in general immature and/or early-mature, the hydrocarbon potential of the study area is very limited.

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Section: Stratigraphy Of the Küçükkuyu Formationmentioning

confidence: 99%

Section: Stratigraphy Of the Küçükkuyu Formationmentioning

confidence: 99%

“…The unit starts with sandstone-shale alternation at lower levels, passing into sandstone with pebbles. The dominant lithology is tuffite and carbonate-cemented sandstone (Bozcu, 2015).…”

Section: Stratigraphy Of the Küçükkuyu Formationmentioning

confidence: 99%

Section: Stratigraphy Of the Küçükkuyu Formationmentioning

confidence: 99%

Section: Stratigraphy Of the Küçükkuyu Formationmentioning

confidence: 99%

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