488-505
Egypt. J. of Appl. Sci., 28 (9) 2013
ORGANIC EVALUATION OF THE BLACK SHALES OF
THE DUWI FORMATION IN SOME PHOSPHATE MINES
AT SAFAGA-QUSEIR AREA!. RED SEA COAST, EGYPT.
1*
2
EI-Fakharany M .. A ; Mohamed F. Ghanem; Mostafa G Temraz ;
Mohamed M. Afife 1 ; Abu Bakr F. Maky2 and A.M. Abdel AaJ2
2
Geology Department, Faculty of Science, Benha University, Benha, QaIiobyia, Egypt. 2)
Exploration Department, Egyptian Petroleum Research Institute, Nasr City, Cairo, Egypt.
"Corresponding author: Elfakharany@fsc.bu.edu.eg
J)
Key Words: Safaga - Quseir area, Duwi Formation, Black Shale, RockEval
pyrolysis, Total Organic Carbon, Production Index, Tmax, Gas
Chromatography, Carbon Preference Index, Pristane, Phytane
ABSTRACT
Twelve samples of the Black shale deposits of the Late Cretaceous
Duwi Formation at phosphate mines at Safaga - Quseir area, Red Sea, Egypt
was assessed by rock eval pyrolysis. The kerogen contained in the studied
black shale classified mainly as type I, type II, mixed type VII and some
aretype III. Most of the samples in Urn Huetate , El Nakheil , EI Beida and
Mohamed Rabah mines are very good source rock (TOC > 2 wt%) except two
samples are poor (TOC<O.5 wt%) in Mohamed Rabah mines. The maturation
of kerogen in the studied sample is immature according to PI and Tmax.
Representative bitumen samples were fractionated by medium pressure liquid
chromatography into saturated hydrocarbon, aromatic hydrocarbon and polar
compounds. The saturated hydrocarbons were determined by gas
chromatography (GC). The ratios of pristane/phytane, isoprenoids/n-alkane
and CPI, suggest that the most samples were deposited in marine environments
while some were deposited in terrestrial environment. Also, these samples are
characterized by immature level.