SEDIMENTARY SETTING AND PALEOECOLOGY OF THE UPPER CRETACEOUS RUDIST-BEARING DEPOSITS IN KHORRAM ABAD, ZAGROS BASIN

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MAGHFOURI MOGHADDAM I.

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Journal: GEOSCIENCES Year:2017 | Volume:26 | Issue:104 Page(s): 173-186

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Title

SEDIMENTARY SETTING AND PALEOECOLOGY OF THE UPPER CRETACEOUS RUDIST-BEARING DEPOSITS IN KHORRAM ABAD, ZAGROS BASIN

Author(s)

MAGHFOURI MOGHADDAM I. | Issue Writer Certificate

Keywords

RUDISTQ2

PALEOECOLOGYQ2

LATE CRETACEOUSQ2

LORESTANQ2

ZAGROS BASINQ1

Abstract

Sedimentary setting and PALEOECOLOGY of the RUDIST-bearing Upper Cretaceous strata were studied in three sections in Khorram abad. The sections include: Tang Shabi Khone, Cham Sangar (Tarbur Formation) and Pir Shams Eldin (upper part of Amiran Formation). The Tang- E Shabi Khone and Chamsangar sections are located in Zagros Trust zone while, the Pir Shams Eldin in LORESTAN zone. On the basis of the recognized fossils, the three sections are assigned to the LATE CRETACEOUS (Middle to Late Masstrichtian) and are comparable to Omphalocyclus- Loftusia Assemblage Zone. The petrography study showed that the three sections contain nine microfacies that deposited in an open marine, shoal and restricted marine that based on RUDIST sedimentary models, are comparable to the Inner- shelf basin prograding margin complexes (Tarbur Formation) and the low- angel open shelf margin complexes (Amiran Formation). Probably, Sepid Kuh Fault was detaching the these settings. Augmentation of entering the detrital and silica due to river injection and runoff and consequently to the eurotrophic conditions in the Tnage Shabi Khone and Pir Shams Eldin, frequency of agglutinate foraminifera were increased but in the chamsangar section due to oligotraphy condition, frequency of hyaline foraminifera is increased. Distribution of the foraminifera and algae indicated that the Tarbur Formation is deposited in a photic zone though, some parts of the carbonates of the Amiran Formation were deposited in a aphotic zone.

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APA: Copy

MAGHFOURI MOGHADDAM, I.. (2017). SEDIMENTARY SETTING AND PALEOECOLOGY OF THE UPPER CRETACEOUS RUDIST-BEARING DEPOSITS IN KHORRAM ABAD, ZAGROS BASIN. GEOSCIENCES, 26(104 ), 173-186. SID. https://sid.ir/paper/32686/en

Vancouver: Copy

MAGHFOURI MOGHADDAM I.. SEDIMENTARY SETTING AND PALEOECOLOGY OF THE UPPER CRETACEOUS RUDIST-BEARING DEPOSITS IN KHORRAM ABAD, ZAGROS BASIN. GEOSCIENCES[Internet]. 2017;26(104 ):173-186. Available from: https://sid.ir/paper/32686/en

IEEE: Copy

I. MAGHFOURI MOGHADDAM, “SEDIMENTARY SETTING AND PALEOECOLOGY OF THE UPPER CRETACEOUS RUDIST-BEARING DEPOSITS IN KHORRAM ABAD, ZAGROS BASIN,” GEOSCIENCES, vol. 26, no. 104 , pp. 173–186, 2017, [Online]. Available: https://sid.ir/paper/32686/en

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