TY - JOUR ID - 54549 TI - Organic Matter Characterization and Thermal Modeling of the Basal Black Shale from the Shemshak Group (Upper Triassic- Middle Jurassic) in the Tazareh Section, Eastern Alborz, Northern Iran JO - Scientific Quarterly Journal of Geosciences JA - GSJ LA - en SN - 1023-7429 AU - Shekarifard, Ali AU - Baudin, F. AU - Seyed-Emami, K. AU - Schnyder, J. AU - Rahimpour-Bonab, H. AD - Petroleum Engineering Group, Institute of Petroleum Engineering, College of Engineering, University of Tehran. AD - Institut des Sciences de la Terre de Paris, UPMC-Univ. Paris06 et CNRS, UMR 7193, Paris, France. AD - School of Mining Engineering, University College of Engineering, University of Tehran, Tehran, Iran. AD - Institut des Sciences de la Terre de Paris, UPMC-Univ. Paris06 et CNRS, UMR 7193, Paris, France AD - School of Geology, University College of Science, University of Tehran, Tehran, Iran. Y1 - 2012 PY - 2012 VL - 21 IS - 83 SP - 219 EP - 228 KW - Thermal Modeling KW - Petroleum source rock evaluation KW - Shemshak Group KW - Upper Triassic-Middle Jurassic KW - Tazareh section KW - Alborz KW - Northern Iran DO - 10.22071/gsj.2012.54549 N2 - Geochemical characteristics (Rock-Eval pyrolysis and elemental analysis of kerogen), palynofacies and organic petrography (using light transmitted-reflected-uv microscopy) of the basal black shale from the Shemshak Group (Upper Triassic- Middle Jurassic) in the Tazareh section (Eastern Alborz) have been investigated. The basal black shale is rich in amorphous organic matter with fewer amounts of vitrinite particles that was deposited in lacustrine environment under anoxic to suboxic conditions. According to vitrinite reflectance values (mean VRr=2.1%), organic matter of the basal black shale has experienced high thermal maturity during deep burial. In this study samples residual organic carbon content is 1 wt.% on average. Thermal modeling results using 1D Genex4 software show that the basal black shale of the Shemshak Group became mature during the Middle Jurassic-Lower Cretaceous time and generated hydrocarbon. At the present day, this organic facies in the Tazareh section is thermally over-mature and depleted in hydrogen and is located in the dry gas generation window. Presently, these sediments are considered as shale gas resources.   UR - http://www.gsjournal.ir/article_54549.html L1 - http://www.gsjournal.ir/article_54549_fee0474273045f643f16ab487c1ed73b.pdf ER -