TITLE:
Facies Analysis, Depositional Environment of the Lower Permian Deposits of Chili Formation in Kalmard Block, Eastern Central Iran (Darin Section)
AUTHORS:
Javad Shahraki, Mohammad Javad Javdan, Seyed Mahmood Pahlavan Hashemi, Mohsen Jami, Mahdiyeh Nastooh, Seyed Mohammad Kalvandi
KEYWORDS:
Kalmard Area, Chili Formation, Depositional Environment, Darinsection, Paleotethys, Sartakht, Gachal
JOURNAL NAME:
Open Journal of Geology,
Vol.5 No.8,
August
13,
2015
ABSTRACT: Early Permian deposits in
north of Kalmard region recognize with formal group of Khan; they have various
features in the different place. This group includes four different formations
from lower to the upper part: Chili, Sartakht and Hermez. These formations
consist of carbonate rocks. Chili Formation has 104 m, thickness in Darin
section and consists of limestone with intermediates of shale and marland
sandstone. Lower boundary of this formation is disconformable with Gachal
formation. The upper boundary is separated by unconformity from the upper part
Sartakht formation according to the lithological characters and microscopic
studies, cause identifications of beach, intertidal, open and semi-restricted
lagoon, shoals and bar and open marine sub-environ- ments for the Chili
Formation. Vertical changes of microfacies and depth changes curve show much
more thickness of shoals and bar microfacies, and little thickness of open and
semi-re- stricted lagoon and open marine microfacies. Deposits of Chili
Formation in Darin section deposited in the gentle gradient Homoclinal ramp in
the south of Paleotethys Ocean. Two depositional sequences have been identified
in this formation, based on recognized Fusulinid, show age of Sakmarian, which
has adaptation with Lower Absaroka III.