Paleostress Reconstruction of Mesozoic deposits In Interior Fars Area (E-SE of Shiraz)

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YOUSEFI T.; YAZDJERDI K.; GHORASHI M.; SHAHIDI A.R.

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Journal: GEOSCIENCES Year:2019 | Volume:28 | Issue:111 Page(s): 53-64

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Title

Paleostress Reconstruction of Mesozoic deposits In Interior Fars Area (E-SE of Shiraz)

Author(s)

YOUSEFI T. | YAZDJERDI K. | GHORASHI M. | SHAHIDI A.R. | Issue Writer Certificate

Keywords

Zagros Simply FoldedQ1

Ancient tensionQ2

Inversion methodQ2

Mesozoic depositQ1

Brittle tectonicQ1

Abstract

The Brittle tectonic history expresses different tectonic events in the Zagros Simply Folded Belt. Consequence of Mesozoic extension, rifting and the shortening derived from the Cenozoic Eurasia – Arabia collision. In order to reconstruction the Ancient tensions in the Mesozoic deposits in the east and south-east of Shiraz, geometry and kinematics of the faults data simultaneously with sedimentation was investigated using the Inversion method, to evaluated rifting time, the former of Neo-Tethys and its collisions in Cretaceous and Paleocene. In this regard 21 stations have been exposed in Khanekat to Pabdeh Formations. The resulted geometry and kinematics of the faults data were calculated situation main tension axes (σ 1, σ 2, σ 3 ), tension ellipsoid figure or ratio of difference (ɸ ). The results are as follows: from Triassic to upper Cretaceous (Mastrichtian) in Khanekat, Surmeh, Fahlian, Darian, Sarvak, Ilam, Gurpi, Tarbur Formations and Ghorban Member; extensional tectonic regime was dominant and having NE-SW direction (N052° ) but in Pabdeh Formation with Paleocene age, tectonic regime has changed into compression with NE-SW compressional stress direction(N045° ). So it was concluded that in simply folded Zagros of interior Fars, time of rifting and the forming of Neo-Tethyan basin was Triassic or older (Permian) with NE-SW extensional direction. The beginning of compressional tectonic regime with the same direction has been in Paleocene.

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APA: Copy

YOUSEFI, T., YAZDJERDI, K., GHORASHI, M., & SHAHIDI, A.R.. (2019). Paleostress Reconstruction of Mesozoic deposits In Interior Fars Area (E-SE of Shiraz). GEOSCIENCES, 28(111 ), 53-64. SID. https://sid.ir/paper/32206/en

Vancouver: Copy

YOUSEFI T., YAZDJERDI K., GHORASHI M., SHAHIDI A.R.. Paleostress Reconstruction of Mesozoic deposits In Interior Fars Area (E-SE of Shiraz). GEOSCIENCES[Internet]. 2019;28(111 ):53-64. Available from: https://sid.ir/paper/32206/en

IEEE: Copy

T. YOUSEFI, K. YAZDJERDI, M. GHORASHI, and A.R. SHAHIDI, “Paleostress Reconstruction of Mesozoic deposits In Interior Fars Area (E-SE of Shiraz),” GEOSCIENCES, vol. 28, no. 111 , pp. 53–64, 2019, [Online]. Available: https://sid.ir/paper/32206/en

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