ORGANIC GEOCHEMICAL CHARACTERISTICS OF THE BITUMINOUS MIOCENE UNITS IN THE SEVINC-AGAPINAR REGION, ESKISEHIR GRABEN, TURKEY

Altunsoy M., Şengüler I., Hokerek S., Unal N., Özçelik O.

13th International Multidisciplinary Scientific Geoconference, SGEM 2013, Albena, Bulgaristan, 16 - 22 Haziran 2013, ss.149-150 identifier identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Doi Numarası: 10.5593/sgem2013/ba1.v1/s01.021
  • Basıldığı Şehir: Albena
  • Basıldığı Ülke: Bulgaristan
  • Sayfa Sayıları: ss.149-150
  • Anahtar Kelimeler: Organic geochemistry, Miocene, Bituminous rocks, Eskisehir, Turkey, PYROLYSIS
  • Akdeniz Üniversitesi Adresli: Evet

Özet

In the Sevinc-Agakoy (Eskisehir-Turkey) region the Miocene units consist of conglomerate, sandstone, claystone, coal, marl, siltstone, bituminous shale and limestone. Total Organic Carbon (TOC) values (eliminated below 0.10 wt % and except to coaly samples values) in the Miocene bituminous units range between 0.12-18.69 %. Rock-Eval analyses on bituminous core samples with the highest TOC values give hydrogen index (HI) values from 6-588 mg HC/g TOC and oxygen index (01) values from 22-367 mg CO2/g TOC. The organic matter can be classified as Type II and III kerogen on the modified van Krevelen diagram. T-max values vary between 326 and 432 degrees C, with an average of 374 degrees C indicating the diagenesis stage. Based on the microscopic studies, organic matter is composed of predominantly autochthonous algal and amorphous material, with a minor contribution of terrestrial material. The average vitrinite reflectance value is 0.34 %. Vitrinite reflection index and T-max values indicate that the organic matter is immature.