Geochemical identification of oil source formations in southeastern Iran (Persian Gulf)

The isotope characteristics of corresponding fractions of an organic substa nce and oils were compared in order to identify oil source rocks in the sou theastern Iranian Zagros. The genetic unity of oil in the Jahrom and Sarvak formations was distinguished. The deeply buried sediments of the Gahkum Fo rmation of the Ordovician-Silurian age are the most probable oil source for these formations. The Kazhdomi and Pabdeh formations, which are oil source rocks of the greatest fields of the western Zagros, were not involved in o il generation in the eastern Zagros.