oligocene stratigraphy of the northern subcoastal fars zone (tang-e-khoshk, zagros structures, iran): biostratigraphy and paleoenvironment

نویسندگان

azam zare

afshin hashmie

چکیده

objective: the asmari formation is characterised by alternation thick carbonate and marl sequence of the oligocene- miocene in the zagros basin, southwest of iran that were deposited on the shelf of eastern paratethys. methods: this formation is exposed at tang-e-khoshk in the fars subcoastal zone with a thickness of 286 m comprising alternation of medium and thick to massive bedded carbonates, marlylimestone and marl. the age of the asmari formation in the study area is the oligocene (ruplian&chattian). results: ten microfacies are defined, characterizing a gradual shallowing upward trend; the related environments are as follows: open marine (mf1, 2&3), shoal (mf4) and lagoon (mf5, 6&7). a carbonate ramp platform is suggested for the depositional environment of the asmari formation. mf 1, 2, 3 &4 are characterized by the occurrence of large and small foraminifera representing a represent a deeper fair weather wave base of a middle ramp setting. mf 5, 6& 7 with large particles of different bioclast debis and algae, shallow-water setting of an inner ramp.

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منابع مشابه

Oligocene stratigraphy of the Northern Subcoastal Fars Zone (Tang-e-Khoshk, Zagros structures, Iran): Biostratigraphy and Paleoenvironment

Objective: The Asmari Formation is characterised by alternation thick carbonate and marl sequence of the Oligocene- Miocene in the Zagros Basin, southwest of Iran that were deposited on the shelf of Eastern Paratethys. Methods: This formation is exposed at Tang-e-Khoshk in the Fars subcoastal zone with a thickness of 286 m comprising alternation of medium and thick to massive bedded carbonates,...

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Oligocene stratigraphy of the Northern Subcoastal Fars Zone (Tang-e-Khoshk, Zagros structures, Iran): Biostratigraphy and Paleoenvironment

Objective: The Asmari Formation is characterised by alternation thick carbonate and marl sequence of the Oligocene- Miocene in the Zagros Basin, southwest of Iran that were deposited on the shelf of Eastern Paratethys. Methods: This formation is exposed at Tang-e-Khoshk in the Fars subcoastal zone with a thickness of 286 m comprising alternation of medium and thick to massive bedded carbonates,...

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عنوان ژورنال:
international journal of advanced biological and biomedical research

ناشر: casrp publishing company

ISSN 2383-2762

دوره 3

شماره 1 2015

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