Influence of the Basement Strike-Slip Fault on the 2005 and 2014 Earthquakes, Qeshm Island, Iran

Document Type : Seismology and Engineering Seismology

Author

Imam Khomeini International University, Qazvin

Abstract

The Zagros belt in southern Iran is amongst the world's most seismically active mountain ranges that accommodates a significant portion of the convergence between Arabian and Eurasia Plates. Due to the larger earthquakes in Zagros, which have strike-slip focal mechanisms without any coseismic ruptures at the surface; it is important to identify the source of these earthquakes in the basement. The 2005 and 2014 earthquakes with Mw=5-6 in Qeshm Island are examples of them. The NE-trending Gachin fault zone is one of the main transverse faults that cross cut the major structures of Bandar Abbas zone and continues to the Persian Gulf; in which deformations of the fault are overprinted on the major structures. Based on the field, remote sensing and sismotectonic studies; the Gachin fault zone is the main cause of the recent deformations on the Quaternary sediments in Qeshm Island and its activities are continuing to present time; therefore, the above-mentioned earthquakes were caused by this fault. In other words, the convergence between Arabian and Eurasia Plates is in favour for the reactivation of Gachin fault zone in the basement as earthquakes.

Keywords


Jackson, J. and Fitch, T. (1981) Basement faulting and the focal depths of the larger earthquakes in the Zagros Mountains (Iran). Geophys. J. Int., 64, 561-586.
Jackson, J. and McKenzie, D. (1988) The relationship between plate motions and seismic moment tensors, and the rates of active deformation in the Mediterranean and Middle East. Geophys. J. Int., 93, 45-73.
Maggi, A., Jackson, J.A., Priestley, K., and Baker, C. (2000) A re-assessment of focal depth distributions in southern Iran, the Tien Shan and northern India: do earthquakes really occur in the continental mantle? Geophys. J. Int., 143, 629-661.
Lohman, R.B. and Simons, M. (2005) Locations of selected small earthquakes in the Zagros mountains. Geochem. Geophys. Geosyst., 6, Q03001, doi:10.1029/2004GC000849.
Nissen, E., Yamini-Fard, F., Tatar, M., Gholamzadeh, A., Bergman, E., Elliott, J.R., Jackson, J.A., and Parsons, B. (2010) The vertical separation of mainshock rupture and microseismicity at Qeshm island in the Zagros Simply Folded Belt, Iran. Earth planet. Sci. Lett., 296, 181-194.
Nissen, E., Tatar, M., Jackson, J.A., and Allen, M.B. (2011) New views on earthquake faulting in the Zagros fold-and-thrust belt of Iran. Geophys. J. Int., 186, 928-944.
Nissen, E., Jackson, J., Jahani, S., and Tatar, M. (2014) Zagros "phantom earthquakes" reassessed- The inter- play of seismicity and deep salt flow in the Simply Folded Belt? J. Geophys. Res. Solid Earth, 119, doi:10.1002/2013JB010796.
Berberian, M. (1995) Master "blind" thrust faults hidden under the Zagros folds: active basement tectonics and surface morphotectonics. Tectonophysics, 241, 193-224.
Talebian, M. and Jackson, J. (2004) A reappraisal of earthquake focal mechanisms and active shortening in the Zagros mountains of Iran. Geophys. J. Int., 156, 506-526.
Sella, G.F., Dixon, T.H., and Mao, A.L. (2002) REVEL: a model for recent plate velocities from space geodesy. J. Geophys. Res., 107(B4), Art. No. 2081.
Vernant, Ph., Nilforoushan, F., Hatzfeld, D., Abbassi, M.R., Vigny, C., Masson, F., Nankali, H., Martinod, J., Ashtiani, A., Bayer, R., Tavakoli, F., and Chery, J. (2004) Contemporary crustal deformtaion and plate kinematics in Middle East constrained by GPS measurements in Iran and northern Oman. Geophys. J. Int., 157, 381-398.
Walker, R.T., Andalibi, M.J., Gheitanchi, M.R., Jackson, J.A., Karegar, S., and Priestley, K. (2005) Seismological and field investigations from the 1990 November 6 Furg (Hormozgan) earthquake: a rare case of surface rupture in the Zagros Mountains of Iran. Geophys. J. Int., 163, 567-579.
Stocklin, J. (1968) Structural history and tectonics of Iran: a review. Am. Assoc. Petrol. Geol. Bull., 52, 1229-1258.
Falcon, L. (1969) 'Problems of the relationship between surface structure and deep displacements illustrated by the Zagros range'. In: Time and Place Orogeny. P. Kent, G. Satterthwaite and A. Spencer (Eds), Geol. Soc. London, 9-22.
Colman-Sadd, S.P. (1978) Fold development in Zagros simply folded belt, Southwest Iran. AAPG Bulletin, 62, 984-1003.
Keilis-Borok, V.I. and Rotwain, I.M. (1990) Diagnosis of time of increased probability of strong earthquakes in different regions of the world: algorithm CN. Phys Earth Planet Inter, 61, 57-72.
Jackson, D.D. and Kagan, Y.Y. (1999) Testable earthquake forecasts for 1999. Seismol. Res. Lett., 70, 393-403.
Kossobokov, V.G., Romashkova, L.L., Keilis-Borok, V.I., and Healy, J.H. (1999) Testing earthquake prediction algorithms: statistically significant advance prediction of the largest earthquakes in the Circum-Pacific, 1992-1997. Phys Earth Planet Inter , 111, 187-196.
Kagan, Y.Y. and Jackson, D.D. (2000) Probabilistic forecasting of earthquakes. Geophys. J. Int., 143, 438-453.
Rhoades, D.A. and Evison, F.F. (2004) Longrange earthquake forecasting with every earthquake a precursor according to scale. Pure Appl. Geophys., 161, 47-71.
Tiampo, K.F., Assefa, D., Fernandez, J., Mansinha, L., and Rasmussen, H. (2008) Postseismic deformation following the 1994 Northridge earthquake identified using the localized Hartley Transform Filter. Earth Sciences and Mathematics, 1577-1602.
Alinaghi, A. (2007) Moment Tensor inversion of some events of Qeshm Island earthquake sequences using INSN broadband data. JSEE, 9(3), 153-157.
Nissen, E., Ghorashi, M., Jackson, J., Parsons, B., and Talebian, M. (2007) The 2005 Qeshm Island earthquake (Iran)-a link between buried reverse faulting and surface folding in the Zagros Simply Folded Belt? Geophys. J. Int., 171, 326-338.
Davoodi, Z. (2015) The Gachin fault zone as the main cause of the recent deformations on the sedimentary cover and the 2014 May 27 earthquake in the South of Qeshm Island. SEE 7 Conference, Tehran.
Ricou, L.E., Braud, J., and Brunn, J.H. (1977) Le Zagros. Memoire hors Serie de la Societe Geologique de France, 8, 33-52.
Stoneley, R. (1990) The Arabian continental margin in Iran during the Late Cretaceous. Geol. Soc. Lond. Spec. Publ., 49, 787-795.
Husseini, M.I. (1992) Upper Palaeozoic tectonosedimentary evolution of the Arabian and adjoining plates. J. Geol. Soc. Lond., 149, 419-429.
Hessami, K., Koyi, H.A., Talbot, C.J., Tabasi, H., and Shabanian, E. (2001) Progressive unconformities within an evolving foreland fold thrust belt, Zagros Mountains. J. geol. Soc. Lond., 158, 969-981.
Allen, M.B. and Armstrong, H.A. (2008) Arabia Eurasia collision and the forcing of mid-Cenozoic global cooling. Palaeogeog. Palaeoclim. Palaeoecol., 265, 52-58.
Stoneley, R. (1990) The Arabian continental margin in Iran during the Late Cretaceous. Geol. Soc. Lond. Spec. Publ., 49, 787-795.
McQuarrie, N., Stock, J.M., Verdel, C., and Wernicke, B.P. (2003) Cenozoic evolution of Neotethys and implications for the causes of plate motions. Geophys. Res. Lett., 30(20), 2036, doi:10.1029/2003GL017992.
Stocklin, J. (1974) 'Possible ancient continental margins in Iran'. In: The Geology of Continental Margins , 873-887, Springer-Verlag, New York, NY.
Falcon, N.L. (1974) Southern Iran: Zagros mountains. Geol. Soc. Lond. Spec. Publ., 4, 199-211.
Regard, V., Bellier, O., Thomas, J., Abbassi, M.R., Mercier, J., Shabanian, E., Feghhi, K., and Soleymani, S. (2004) Accommodation of Arabia-Eurasia convergence in the Zagros-Makran transfer zone, SE Iran: a transition between collision and subduction through a young deforming system. Tectonics, 23, TC4007, doi:10.1029/2003TC001599.
Alavi, M. (2007) Structures of the Zagros fold-thrust belt in Iran. Am. J. Sci., 307, 1064-1095.
Al Amri, A.M. and Gharib, A.A. (2000) Lithospheric seismic structure of the eastern region of the Arabian Peninsula. J. Geodyn., 29, 125-139.
Al Damegh, K., Sandvol, E., and Barazangi, M. (2005) Crustal structure of the Arabian plate: new constraints from the analysis of teleseismic receiver functions. Earth planet. Sci. Lett., 231, 177-196.
Gok, R., Mahdi, H., Al Shukri, H., and Rodgers, A.J. (2008) Crustal structure of Iraq from receiver functions and surface wave dispersion: implications for understanding the deformation history of the Arabian-Eurasian collision. Geophys. J. Int., 172, 1179-1187.
Hessami, K., Koyi, H.A., and Talbot, C.J. (2001) The significance of strike slip faulting in the basement of the Zagros fold and thrust belt. J. Petrol. Geol., 24, 5-28.
Walpersdorf, A., Hatzfeld, D., Nankali, H., Tavakoli, F., Nilforoushan, F., Tatar, M., Vernant, P., Chery, J., and Masson, F. (2006) Difference in the GPS deformation pattern of North and Central Zagros (Iran). Geophys. J. Int., 167, 1077-1088.
Furst, M. (1990) Strike-slip faults and diapirism of the South-Eastern Zagros ranges. Proceedings in Symposium of Diapir ism, Bandar Abbas, Hormozgan, Iran, 2, 149-181.
Ameen, M.S. (1992) Effect of basement tectonic on hydrocarbon generation, migration and accumulation in northern Iraq. AAPG Bull., 76, 356-370.
Barzegar, F. (1994) Basement fault mapping of E Zagros folded belt (SW Iran) based on space-born remotely sensed data. Proceedings of the 10th Thematic Conference on Geologic Remote Sensing: Exploration, Environment and Engineering. San Antonio, Texas, 455-466.
Yassaghi, A. (2006) Integration of landsat imagery interpretation and geomagnetic data on verification of deep-seated transverse fault lineaments in SE Zagros, Iran. Int. J. Remote Sens., 27(18-20), 4529-4544.
Molinaro, M., Leturmy, P., Guezou, J.-C., Frizon de Lamotte, D., and Eshraghi, S.A. (2005) The structure and kinematics of the southeastern Zagros foldthrust belt, Iran: from thin-skinned to thick-skinned tectonics. Tectonics , 24, TC3007, doi:10.1029/2004TC001633.
Kugler, A. (1973) An Interpretation of the Southwest Iran Aeromagnetic Survey. Unpublished 1205, Oil Service Company of Iran.
Morris, P. (1977) Basement Structure as Suggested by Aeromagnetic Surveys in SW Iran. Internal Report, Oil Service Company of Iran.
Talebian, M. (2003) Active Faulting in the Zagros Mountains of Iran. Ph.D. Thesis, University of Cambridge.
Woodcock, N.H. and Daly, M.C. (1986) The role of strike-slip fault systems at plate boundaries [and Discussion]. Philosophical Transactions,
(1539).
Sylvester, A.G. (1988) Strike-slip faults. Geological Society of Amer ica Bulletin, 100(11), 1666-1703.
Lowell, J.D. (1972) Spitzbergen tertiary orogenic elt and the Spitzbergen fracture zone. Geol. Soc. Am. Bull., 83, 3091-3102.
Wilcox, R.E., Harding, T.P., and Seely, D.R. (1973) Basin wrench tectonics. AAPG Bulletin, 57, 74-96.
Richard, P., Mocquet, B., and Cobbold, P.R. (1991) Experiments on simultaneous faulting and folding above a basement wrench fault. Tectonophysics, 188(1-2), 133-141.
Odonne, F. and Costa, E. (1993) Relationships between strike-slip movement and fold trends in thin-skinned tectonics: analogue models. Tectonophysics, 228, 383-391.
Davoodi, Z. and Yassaghi, A. (2009) Syn- to post-collision role of Izeh transverse fault zone in deformation of the Zagros fold-thrust belt. Journal of Trabajos de Geologia , 29, 206-212.