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Information Journal Paper

Title

FACIES ANALYSIS AND SEQUENCE STRATIGRAPHY OF THE MOBARAK FORMATION IN SOUTH OF SHEMSHAK (CENTRAL ALBORZ - NORTH OF TEHRAN)

Pages

  97-108

Abstract

 The Mobark Formation (Lower Carboniferous) in south of Shemshak (north of Tehran) is overlain and underlain with disconformable contacts, by the Dozdband and Jeirud Formations respectively. The thickness of the MOBARAK FORMATION in south of Shemshak is 322 meters and is divided into members 1 and 2. These members consist of various facies related to fairweather conditions, but facies related to storm and turbidity currents are also recognized.These facics, based on their DEPOSITIONAL ENVIRONMENT, belong to four facies groups related to open marine, barrier, lagoon and tidal flat sub-environments.Facies of member 1 related to open marine, bioclastic barrier and lagoonal subenvironments.Open marine facies, particulary the dark grey shales of the deeper part of this environment, make the main part of member 1. Storm and turbidity current deposits are recognized in this member. The carbonate turbidites indicate that member 1 was deposited in a distally steepened ramp during sea-level highstand, similar to the deep (off bank) of the present day bahamas platform. Facies of member 2 belong to open marine, bioclast/ooid barriers, Lagoon and tidal flat sub-environments. Preservation of the ooids indicate high global sea-level and formation of low- Mg calcite ooids. Rocks of member 2 were deposited in a carbonate ramp similar to the southern part of the Persian Gulf.Field and microscopic studies of the MOBARAK FORMATION have led to recognition of seven sequences (3rd order cycle) and several small scales shallowing upward cycles (parasequence). Member 1 consists of three sequences and member 2 contains four sequences respectively. The lower contact of sequence 1 with the Jeirud Formation, contact between sequences 3 and 4 and the upper contact of sequence 7 with the Dozdband Formation are type 1 unconformity (SB1) and other contacts are type 2 unconformity (SB2). These sequences belong to the upper part of Kaskaskia supersequence.

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    APA: Copy

    SHARAFI, NILOOFAR, JAHANI, DAVOOD, & LASEMI, YAGHOOB. (2008). FACIES ANALYSIS AND SEQUENCE STRATIGRAPHY OF THE MOBARAK FORMATION IN SOUTH OF SHEMSHAK (CENTRAL ALBORZ - NORTH OF TEHRAN). JOURNAL OF THE EARTH, 3(1), 97-108. SID. https://sid.ir/paper/193070/en

    Vancouver: Copy

    SHARAFI NILOOFAR, JAHANI DAVOOD, LASEMI YAGHOOB. FACIES ANALYSIS AND SEQUENCE STRATIGRAPHY OF THE MOBARAK FORMATION IN SOUTH OF SHEMSHAK (CENTRAL ALBORZ - NORTH OF TEHRAN). JOURNAL OF THE EARTH[Internet]. 2008;3(1):97-108. Available from: https://sid.ir/paper/193070/en

    IEEE: Copy

    NILOOFAR SHARAFI, DAVOOD JAHANI, and YAGHOOB LASEMI, “FACIES ANALYSIS AND SEQUENCE STRATIGRAPHY OF THE MOBARAK FORMATION IN SOUTH OF SHEMSHAK (CENTRAL ALBORZ - NORTH OF TEHRAN),” JOURNAL OF THE EARTH, vol. 3, no. 1, pp. 97–108, 2008, [Online]. Available: https://sid.ir/paper/193070/en

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