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Structural elements of the Makran region, Oman sea and their potential relevance to tsunamigenisis

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  • Mohammad Mokhtari
  • Iraj Abdollahie Fard
  • Khaled Hessami

Abstract

The character of convergence along the Arabian–Iranian plate boundary changes radically eastward from the Zagros ranges to the Makran region. This appears to be due to collision of continental crust in the west, in contrast to subduction of oceanic crust in the east. The Makran subduction zone with a length of about 900 km display progressively older and highly deformed sedimentary units northward from the coast, together with an increase in elevation of the ranges. North of the Makran ranges are large subsiding basins, flanked to the north by active volcanoes. Based on 2D seismic reflection data obtained in this study, the main structural provinces and elements in the Gulf of Oman include: (i) the structural elements on the northeastern part of the Arabian Plate and, (ii) the Offshore Makran Accretionary Complex. Based on detailed analysis of these data on the northeastern part of the Arabian Plate five structural provinces and elements—the Musendam High, the Musendam Peneplain, the Musendam Slope, the Dibba Zone, and the Abyssal Plain have been identified. Further, the Offshore Makran Accretionary Complex shown is to consist Accretionary Prism and the For-Arc Basin, while the Accretionary Prism has been subdivided into the Accretionary Wedge and the Accreted/Colored Mélange. Lastly, it is important to note that the Makran subduction zone lacks the trench. The identification of these structural elements should help in better understanding the seismicity of the Makran region in general and the subduction zone in particular. The 1945 magnitude 8.1 tsunamigenic earthquake of the Makran and some other historical events are illustrative of the coastal region’s vulnerability to future tsunami in the area, and such data should be of value to the developing Indian Ocean Tsunami Warning System. Copyright Springer Science+Business Media B.V. 2008

Suggested Citation

  • Mohammad Mokhtari & Iraj Abdollahie Fard & Khaled Hessami, 2008. "Structural elements of the Makran region, Oman sea and their potential relevance to tsunamigenisis," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 47(2), pages 185-199, November.
  • Handle: RePEc:spr:nathaz:v:47:y:2008:i:2:p:185-199
    DOI: 10.1007/s11069-007-9208-0
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    References listed on IDEAS

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    1. Dale Dominey-Howes & Phil Cummins & David Burbidge, 2007. "Historic records of teletsunami in the Indian Ocean and insights from numerical modelling," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 42(1), pages 1-17, July.
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    Cited by:

    1. Reza Derakhshani & Mojtaba Zaresefat & Vahid Nikpeyman & Amin GhasemiNejad & Shahram Shafieibafti & Ahmad Rashidi & Majid Nemati & Amir Raoof, 2023. "Machine Learning-Based Assessment of Watershed Morphometry in Makran," Land, MDPI, vol. 12(4), pages 1-19, March.
    2. Amanullah Mengal & Katsuichiro Goda & Muhammad Ashraf & Ghulam Murtaza, 2021. "Social vulnerability to seismic-tsunami hazards in district Gwadar, Balochistan, Pakistan," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 108(1), pages 1159-1181, August.
    3. Hamid Zafarani & Leila Etemadsaeed & Mohammad Rahimi & Navid Kheirdast & Amin Rashidi & Anooshiravan Ansari & Mohammad Mokhtari & Morteza Eskandari-Ghadi, 2023. "Probabilistic tsunami hazard analysis for western Makran coasts, south-east Iran," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 115(2), pages 1275-1311, January.
    4. Firyal Bou-Rabee & Yin Lu Young & Emile A. Okal, 2020. "Evidence of prehistoric liquefaction in Kuwait and implications for the seismic vulnerability of the Arabian Gulf Countries," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 103(1), pages 799-813, August.
    5. G. Hoffmann & K. Reicherter & T. Wiatr & C. Grützner & T. Rausch, 2013. "Block and boulder accumulations along the coastline between Fins and Sur (Sultanate of Oman): tsunamigenic remains?," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 65(1), pages 851-873, January.
    6. D. Meshram & S. Sangode & A. Gujar & N. Ambre & D. Dhongle & S. Porate, 2011. "Occurrence of soft sediment deformation at Dive Agar beach, west coast of India: possible record of the Indian Ocean tsunami (2004)," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 57(2), pages 385-393, May.

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