Scientific Quarterly Journal of Geosciences

Scientific Quarterly Journal of Geosciences

The investigation of paleo-stress based on the study of fractures in Zagros collision zone Kermanshah region

Document Type : Original Research Paper

Authors
Sepideh Rezabeyk 1
Abdollah Saidi 2
Mehran Arian 3
Ali Sorbi 4
1 Ph.D. Student, Islamic Azad University, Science and Research Branch, Tehran, Iran
2 Earth Sciences Research Institute, Geological Survey of Iran, Tehran, Iran
3 Department of Geology, Islamic Azad University, Science and Research Branch, iran
4 Department of Geology, Islamic Azad University, Karaj Branch, iran
10.22071/gsj.2017.95512.1228
Abstract
In the Northern part of Suture Zone (Kermanshah) the deep sea sediments, oceanic crust remnants, platform carbonates, igneous and metamorphosed rock of active margin and carbonate sequence of passive margin are assembled in this studied area. This convergent area has provided a very complicated structural zone. The main purpose of this study is stress characteristic analysis. A great data has gathered from the faults which are appeared within the rocks specially the radiolaritic rocks. The data includes characteristics of fault surface geometry, fault slip and lineation slip related. By using the method Right Dihedral, the position of main stress was obtained. The great number of reverse faults have a NW- SW trend, while the strike- slip faults, show a NE- SW direction. The Normal faults with a different displacements appeared younger than the other faults. The result of this study that we obtained the situation of main stress σ1, σ2 and σ3 respectively is 059, 305 and 195.
Keywords
Stress
Conjugate faults
Slip fault analysis
Right Dihedral Method
Kermanshah

Subjects

References
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Berberian, M., 1995- Master “blind” thrust faults hidden under the Zagros folds: active basement tectonics and surface morphotectonics. Tectonophysics 241, p.193- 224.
Beydoun, Z. R., Hughes Clarke, M. W. and Stoneley, R., 1992- Petroleum in the Zagros basin: a Late Tertiary foreland basin overprinted onto the outer edge of a vast hydrocarbon-rich Palaeozoic– Mesozoic passive margin shelf. Am. Assoc. Petrol. Geol. Mem. 55, p.309- 339.
Motiei, H., 1993- Stratigraphy of Zagros, Geological Survey of Iran. 536p
Scientific Quarterly Journal of Geosciences
Volume 28, Issue 111
Volume 28, Issue 111, spring 2019
Spring 2019
Pages 281-288