摘要：The Asmari Formation (a giant hydrocarbon reservoir) is a thick carbonate sequence of the Oligocenee
Miocene in the Zagros Basin, southwest of Iran. This formation is exposed at Tang-e-Lendeh in the Fars
interior zone with a thickness of 190 m comprising medium and thick to massive bedded carbonates. The
age of the Asmari Formation in the study area is the late Oligocene (Chattian)eearly Miocene (Burdigalian).
Ten microfacies are defined, characterizing a gradual shallowing upward trend; the related environments
are as follows: open marine (MF 8e10), restricted lagoon (MF 6e7), shoal (MF 3e5), lagoon (MF 2), and
tidal flat (MF 1). Based on the environmental interpretations, a homoclinal ramp consisting of inner and
middle parts prevails. MF 3e7 are characterized by the occurrence of large and small porcelaneous benthic
foraminifera representing a shallow-water setting of an inner ramp, influenced by wave and tidal processes. MF 8e10, with large particles of coral and algae, represent a deeper fair weather wave base of a
middle ramp setting.
