Writers : Aghaei,S.A.;Mahbubi, A.; Moussavi Harami, S.R.; Nadjafi, M.
Refference : The 22nd Symposium on Geoscience;Tehran
Publishing Year : 1382

Abstract :
Upper Jurassic (Oxfordian_ Kimmeridjian) sediments have a wide exposure in Kope_Dagh basin and is one of important petroliferous units in this basin. The thickness of carbonate and evaporite sediments of Mozduran formation (Upper Jurassic) in south of Aghdarband have wide exposure and in different parts changes from 88.5 to 408.5 meters. Three stratigraphic sections were measured in the easternmost part of the Kope_Dagh basin in Shurab, northeast Shurab and Kal-e-Shah Mohammad. Four group biochemical facies (12 facies), one chemical facies and two silici-clastic facies have been identified in the Upper Jurassic sediments. Based on the type of allochems, frequency of allochems and other textural and structural properties of facies, the carbonate sediments were deposited in a shallow marine carbonate platform including open marine, barrier, lagoon and tidal flat environments. Several shallowness upward parasequences have been identified in these sediments. Evaporate sediments in this formation are mainly gypsum and have been deposited in super tidal and Salina flats. Since the warm and dry climatic conditions were dominated during the Upper Jurassic in the eastern Kope-Dagh basin, these conditions led to deposition of thick unit of evaporate and carbonate in the studied area. Based on information presented above, Upper Jurassic palaeogeography interpreted and represented in the form of five maps.
Subject List : depositional history