Organic material and trace elements of bituminous rocks in the Ozankoy field, Ankara, Turkey

Aliyev S. A., Sari A.

ACTA GEOLOGICA SINICA-ENGLISH EDITION, cilt.81, sa.4, ss.658-667, 2007 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 81 Sayı: 4
  • Basım Tarihi: 2007
  • Doi Numarası: 10.1111/j.1755-6724.2007.tb00989.x
  • Dergi Adı: ACTA GEOLOGICA SINICA-ENGLISH EDITION
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.658-667
  • Anahtar Kelimeler: bituminous rock, organic matter, algae, trace element, rare element, Turkey
  • Ankara Üniversitesi Adresli: Evet

Özet

Bituminous rocks in the Ozankoy (Ankara) field are different from those of the Paleocene-Eocene, Mengen and Guneytepe (Bolu) regions in metal enrichment levels. Organic carbon (C-org) content of organic material-rich rocks in the Ozankoy (Ankara) field is 3.66-40.72% wt averaging 14.34%. The dominant organic materials are algae/amorphous accompanied by minor amount of herbaceous material (The dominant kerogen type is Type-I with a limited amount of Type-II kerogen.). The bituminous rocks in the Ozankoy field are enriched in heavy metals such as Ni, Mn, As and Cr. In comparison with the average enrichment values of elements, Ni, Mn, As and Cr in bituminous shales of the Ozankoy field are as about 4.38, 14.93, 10.90 and 5.58 times as average values. The average concentrations of these heavy metals are also as high as 215 x 10(-6) 828x 10(-6), 58.54 x 10(-6), and 148 x 10(-6) respectively. In addition, sorption properties of clay and organic materials are also important for metal enrichments in the bituminous shales.