Microfacies and Sedimentary Environments of the Fahliyan Formation from the Southwest of Iran (Shiraz, Zagros)

Mahnaz Parvaneh Nejad Shirazi,Mohammad Bahrami,Fatemeh Dashtaby Jahromi

doi:10.4236/ojg.2013.32008

Abstract

The Fahliyan Formation is a carbonate sequence of Lower Cretaceous (Berriasian-Hauterivian) in age and was deposited in the Zagros sedimentary basin. This formation is a part of Khami Group and is a reservoir rock in Zagros Basin. This formation was investigated by a detailed petrographic analysis in order to clarify the depositional facies and sedimentary environment in the Kuh-e-Gadvan in Fars Province. Petrographic studies led to the recognition of nine microfacies that were deposited in four facies belts: tidal flat, lagoon, and barrier and shallow open-marine. An absence of turbidite deposits, reefal facies, and gradual facies changes indicate that the Fahliyan Formation was deposited on a carbonate ramp.

Highlights

The Fahliyan Formation is part of the Lower Cretaceous (Berriasian-Hauterivian) deposits of southwest of Iran
Fahliyan Formation was investigated in a surface section of Kuh-e-Gadvan in the Folded Zagros Zone
Since there aren’t any studies on the microfacies of Fahliyan Formation at Kuh-e-Gadvan or the related reports are not available and study on other properties are not enough, the main objectives of this paper are to 1) describe and interpret the microfacies of deposits of Fahliyan Formation and 2) describe and interpret the depositional environments represented by the Fahliyan Formation

Summary

Introduction

The Fahliyan Formation is part of the Lower Cretaceous (Berriasian-Hauterivian) deposits of southwest of Iran. This formation is one of the important hydrocarbon reservoirs for Khami group in southwest of Iran. The Fahliyan Formation at the type section consists of 332 meters of mainly limestone and argillaceous limestone [1]. It was deposited on a carbonate platform developed across the Zagros Basin. Fahliyan Formation was investigated in a surface section of Kuh-e-Gadvan in the Folded Zagros Zone. Since there aren’t any studies on the microfacies of Fahliyan Formation at Kuh-e-Gadvan or the related reports are not available and study on other properties are not enough, the main objectives of this paper are to 1) describe and interpret the microfacies of deposits of Fahliyan Formation and 2) describe and interpret the depositional environments represented by the Fahliyan Formation

Objectives

Methods

Results

Conclusion