Structural Model for the Northwestern Plunge of Safeen Anticline, Northeastern Iraq
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Abstract
The northwest-southeast trending Safeen Anticline is located within the high folded zone of the Zagros fold and thrust belt within the Foreland. Ten stations were selected through an approximately north-south traverse. Different types of tension joints, shear fractures and faults, as well as their relationships, were studied, showing the influence of pre-existing normal faults and indicating at least two phases of compressional stress separated by a relaxation phase. Each compressional phase influenced the structural model. The second phase was a thrust that affected the southwestern limb and was accompanied by synchronous strike-slip movement with a trend of 029 °. The second was a back thrust that affected the northeastern limb at different time periods, with a trend of 020 ° for ƃ1. A second phase of relaxation occurred after the back thrust. Previous studies have confirmed the variation in the vergence between the Foreland folds, but this study confirms why the vergence varies within the individual traverse.
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References
1. Bonham-Carter G, Qiuming C. Progress in geomathematics: Springer Science & Business Media; 2008.
2. Dunne W, Hancock P, editors. Palaeostress analysis of small-scale brittle structures. Continental deformation; 1994.
3. Davis GH, Reynolds SJ, Kluth CF. Structural geology of rocks and regions: John Wiley & Sons, 2011.
4. Belayneh M. Palaeostress orientation inferred from surface morphology of joints on the southern margin of the Bristol Channel Basin, UK. 2004. https://doi.org/10.1144/GSL.SP.2004.231.01.14
5. Smeraglia L, Fabbi S, Cipriani A, Consorti L, Sirna M, Corbi F, et al. Deformation mechanisms and slip behaviors of tectonically deformed conglomerates from the Central Apennines fold-and-thrust belt: Implications for shallow aseismic and seismic slip. Journal of Structural Geology. 2024;186:105202. https://doi.org/10.1016/j.jsg.2024.105202
6. Numan NM. A plate tectonic scenario for the Phanerozoic succession in Iraq. Iraqi Geological Journal. 1997;30(2):85-110.
7. Numan NM. Cretaceous and Tertiary Alpine subductional history in northern Iraq. Iraqi Journal of Earth Science. 2001;1(2):59-74.
https://doi.org/10.1016/S0191-8141(01)00075-X
8. Mohajjel M, Fergusson CL. Dextral transpression in Late Cretaceous continental collision, Sanandaj–Sirjan zone, western Iran. Journal of Structural Geology. 2000;22(8):1125-39.
9. Aghazadeh M, Castro A, Badrzadeh Z, Vogt K. Post-collisional polycyclic plutonism from the Zagros hinterland: the Shaivar Dagh plutonic complex, Alborz belt, Iran. Geological Magazine. 2011;148(5-6):980-1008.
10. Alipour M. Collision along irregular plate margin controlled the tectono-stratigraphic evolution of the Iranian Zagros fold and thrust belt. Marine and Petroleum Geology. 2023;154:106311. https://doi.org/10.1016/j.marpetgeo.2023.106311
11. Namdarsehat P, Milczarek W, Bugajska-Jędraszek N, Motavalli-Anbaran S-H, Khaledzadeh M. Uncovering a Seismogenic Fault in Southern Iran through Co-Seismic Deformation of the Mw 6.1 Doublet Earthquake of 14 November 2021. Remote Sensing. 2024;16(13):2318. https://doi.org/10.3390/rs16132318
12. Ayyed Hussein W, Thair Mudhir F, Hasnaa Saleh K. Variation of the Anticlines Vergency in the Iraqi Zagros Folds Belt and Its Tectonic Indications. Tikrit Journal of Pure Science. 2020;25(2):64-70. https://doi.org/10.25130/tjps.v25i2.237
13. Al-Jawadi AS, Bety AKS, Ismaeel OA. Lineament analysis using remote sensing and GIS techniques in the Sangaw Area, Kurdistan Region, NE Iraq. The Iraqi Geological Journal. 2022:152-63. https://doi.org/10.46717/igj.55.2C.11ms-2022-08-24
14. Sembroni A, Reitano R, Faccenna C, Callieri P. The geologic configuration of the Zagros Fold and Thrust Belt: an overview. Mediterranean Geoscience Reviews. 2024;6(2):61-86.
https://doi.org/10.1007/s42990-024-00118-6
15. Numan N, Azzawi N. Structural and geotectonic interpretation of vergence directions of anticlines in the foreland folds of Iraq. 1993.
16. Sissakian VK, Al-Jiburi BS. Stratigraphy of the high folded zone. Iraqi Bulletin of Geology and Mining. 2014(6):73-161.
17. Bellen RV, Dunnington H, Wetzel R, Morton D. Lexique stratigraphique international Asie. Iraq Intern Geol Conger Comm Stratigr. 1959;3:333.
18. Hancock P. Brittle microtectonics: principles and practice. Journal of structural geology. 1985;7(3-4):437-57. https://doi.org/10.1016/0191-8141(85)90048-3