BIOSTRATIGRAPHY AND DEPOSITIONAL SEQUENCES OF THE GACHSARAN FORMATION (CHAMPE AND MOL MEMBERS), SOUTHEAST FIROOZABAD, FARS

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HOLAKOYEI Z.; SEYRAFIAN A.; VAZIRI MOGHADAM H.

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Journal: Researches in Earth Sciences Year:2011 | Volume:1 | Issue:4 Page(s): 33-50

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Title

BIOSTRATIGRAPHY AND DEPOSITIONAL SEQUENCES OF THE GACHSARAN FORMATION (CHAMPE AND MOL MEMBERS), SOUTHEAST FIROOZABAD, FARS

Author(s)

HOLAKOYEI Z. | SEYRAFIAN A. | VAZIRI MOGHADAM H. | Issue Writer Certificate

Keywords

BIOSTRATIGRAPHYQ2

DEPOSITIONAL SEQUENCEQ3

GACHSARAN FORMATIONQ2

SOUTH-EAST FIROOZABADQ3

FARSQ2

Abstract

The study section, with a thickness of 652 m, includes the Champeh and Mol Members of the GACHSARAN FORMATION located at the southeast Firoozabad. The Champe Member comprises of thin to medium limestone layers inter-bedded with marl and marly limestone. The Mol Member consists of inter-bedded of thin marly limestone, green and red marl and gypsum and anhydrite. Based on occurrence of the Archaias asmaricus- Archaias hensoni assemblage subzone, the lower part of the section (from base up to 116m) is Chattian in age. The rest of the section is considered to be Aquitanian in age. Facies and microfacies of the Champeh Member reflect deposition in tidal flat and lagoon environments. Tidal flat deposits comprise fenestral mudstone and stromatolite bindstone and lagoon environment identified based on the occurrence of green-gray marl, imperforate and occasionally with perforate foraminifera and peloid in wackestone to grainstone textures. Restricted to semi-restricted lagoonal facies of the Mol Member are gypsum and anhydrite, gypsiferous red marl, hybrid sandstone, mudstone, green-gray marl, imperforate with occasionally perforate foraminifera and peloid with wackestone to grainstone texture.Two third order DEPOSITIONAL SEQUENCEs comprise of TST and HST stacking patterns and a half DEPOSITIONAL SEQUENCE (HST) identified for the studied section. Semi-restricted lagoon facies with increase in foraminifera are characteristic of the TST stacking patterns. Decrease in foraminifera, records the restricted lagoon facies of HST stacking patterns. Identified sequence boundaries are correlateable with depositional boundaries of the other parts of the Zagros.

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APA: Copy

HOLAKOYEI, Z., SEYRAFIAN, A., & VAZIRI MOGHADAM, H.. (2011). BIOSTRATIGRAPHY AND DEPOSITIONAL SEQUENCES OF THE GACHSARAN FORMATION (CHAMPE AND MOL MEMBERS), SOUTHEAST FIROOZABAD, FARS. RESEARCHES IN EARTH SCIENCES, 1(4), 33-50. SID. https://sid.ir/paper/207323/en

Vancouver: Copy

HOLAKOYEI Z., SEYRAFIAN A., VAZIRI MOGHADAM H.. BIOSTRATIGRAPHY AND DEPOSITIONAL SEQUENCES OF THE GACHSARAN FORMATION (CHAMPE AND MOL MEMBERS), SOUTHEAST FIROOZABAD, FARS. RESEARCHES IN EARTH SCIENCES[Internet]. 2011;1(4):33-50. Available from: https://sid.ir/paper/207323/en

IEEE: Copy

Z. HOLAKOYEI, A. SEYRAFIAN, and H. VAZIRI MOGHADAM, “BIOSTRATIGRAPHY AND DEPOSITIONAL SEQUENCES OF THE GACHSARAN FORMATION (CHAMPE AND MOL MEMBERS), SOUTHEAST FIROOZABAD, FARS,” RESEARCHES IN EARTH SCIENCES, vol. 1, no. 4, pp. 33–50, 2011, [Online]. Available: https://sid.ir/paper/207323/en

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