The role of mechanical stratigraphy on folding geometry using subsurface data, A case study from the Aghajari and Pazanan anticlines (south Dezful embayment)

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Tavakoli Yaraki Mehdi; Alavi Seyyed Ahmad; Ghassemi Mohammadreza; ABDOLLAHIE FARD IRAJ

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Journal: GEOSCIENCES Year:2020 | Volume:29 | Issue:116 Page(s): 213-228

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Title

The role of mechanical stratigraphy on folding geometry using subsurface data, A case study from the Aghajari and Pazanan anticlines (south Dezful embayment)

Author(s)

Tavakoli Yaraki Mehdi | Alavi Seyyed Ahmad | Ghassemi Mohammadreza | ABDOLLAHIE FARD IRAJ | Issue Writer Certificate

Keywords

ZagrosQ2

Mechanical stratigraphyQ1

Intermediate detachment levelQ1

Aghajari anticlineQ2

Pazanan AnticlineQ1

Abstract

The significance of Mechanical stratigraphy of rocks in kinematics of folds has long been of interest to structural geologists. Parameters such as sedimentary facies variations and thickness of incompetent layers play major role in activity of these layers as detachment horizons. The purpose of this study is to investigate the role of Mechanical stratigraphy on fold geometry in the Aghajari and Pazanan Anticlines within the Dezful Embayment zone. For this purpose, we have used seismic profiles, stratigraphic data and petrophysical logs as well as the previous stratigraphic works in study area. Results show that the Garau Formation is the major Intermediate detachment level in the Aghajari structure, and has a significant control on folding geometry of the competent sequences of the Fahliyan to Asmari Formations. The Dashtak Formation and other incompetent evaporatic Formations of Middle-Upper Jurassic also have been active in the Aghajari structure. In contrast, in most parts of the Pazanan structure, the Garau and the Jurassic Formations do not have appropriate mechanical properties to act as Intermediate detachment levels due to their change into hemipelagic facies and limestone (Surmeh Formation) respectively. Based on the evidences, the facies change in the abovementioned Formations occurs between the Pazanan and Aghajari anticlines. It seems that activity of the Hendijan-Izeh paleo-high also has some control on facies of the Garau Formation. Based on geometric characteristics and a geometric conceptual model provided for development of these structures, the folding style of the anticlines is suggested as an asymmetric faulted detachment fold type.

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APA: Copy

Tavakoli Yaraki, Mehdi, Alavi, Seyyed Ahmad, Ghassemi, Mohammadreza, & ABDOLLAHIE FARD, IRAJ. (2020). The role of mechanical stratigraphy on folding geometry using subsurface data, A case study from the Aghajari and Pazanan anticlines (south Dezful embayment). GEOSCIENCES, 29(116 ), 213-228. SID. https://sid.ir/paper/399790/en

Vancouver: Copy

Tavakoli Yaraki Mehdi, Alavi Seyyed Ahmad, Ghassemi Mohammadreza, ABDOLLAHIE FARD IRAJ. The role of mechanical stratigraphy on folding geometry using subsurface data, A case study from the Aghajari and Pazanan anticlines (south Dezful embayment). GEOSCIENCES[Internet]. 2020;29(116 ):213-228. Available from: https://sid.ir/paper/399790/en

IEEE: Copy

Mehdi Tavakoli Yaraki, Seyyed Ahmad Alavi, Mohammadreza Ghassemi, and IRAJ ABDOLLAHIE FARD, “The role of mechanical stratigraphy on folding geometry using subsurface data, A case study from the Aghajari and Pazanan anticlines (south Dezful embayment),” GEOSCIENCES, vol. 29, no. 116 , pp. 213–228, 2020, [Online]. Available: https://sid.ir/paper/399790/en

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