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Kinematic analysis of deformed structures in a tectonic mélange: a key unit for the manifestation of transpression along the Zagros Suture Zone, Iran

Published online by Cambridge University Press:  29 June 2012

ALI FAGHIH ,
TIMOTHY KUSKY  and
BABAK SAMANI
ALI FAGHIH*
Affiliation:
Department of Earth Sciences, College of Sciences, Shiraz University, Shiraz, Iran
TIMOTHY KUSKY
Affiliation:
State Key Laboratory for Geological Processes and Mineral Resources, Three Gorges Research Centre for Geohazards, China University of Geosciences, Wuhan, China
BABAK SAMANI
Affiliation:
Department of Earth Sciences, College of Sciences, Shahid Chamran University, Ahvaz, Iran
*
†Author for correspondence: afaghih@shirazu.ac.ir
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Abstract

Kinematic analysis of mélange fabrics provides critical information concerning tectonic processes and evaluation of the kinematics of ancient relative plate motion. Systematic kinematic analysis of deformed structures within a tectonic mélange exposed along the Zagros Suture Zone elucidates that this zone is an ancient transpressional boundary. The mélange is composed of a greywacke and mudstone matrix surrounding various lenses, blocks and ribbons of radiolarian chert, limestone, sandstone, pillow lava, tuff, serpentinite, shale and marl. The deformation fabrics of the mélange suggest that the mélange units were tectonically accreted at shallow levels within a subduction complex, resulting in layer-parallel extension and shearing along a NW–SE-trending suture that juxtaposes the Afro-Arabian continent to the south and the Central Iranian microcontinents to the north. The tectonic mélange is characterized by subhorizontal layer-parallel extension and subsequent heterogeneous non-coaxial shear resulting in alternating asymmetric and layer-parallel extensional fabrics such as P–Y fabrics and boudinaged layers. Kinematic data suggest that the mélange formed during oblique subduction of the Neo-Tethys oceanic lithosphere in Late Cretaceous time. Kinematic shear sense indicators reveal that the slip direction (N9°E to N14°E) during accretion-related deformations reflects the relative plate motion between the Afro-Arabian continent and Central Iranian microcontinents during Late Cretaceous to Miocene times.

Keywords

kinematicsmélangerelative plate motiontranspressionZagrosIran
Type
Original Articles
Information
Geological Magazine , Volume 149 , Issue 6 , November 2012 , pp. 1107 - 1117
Copyright
Copyright © Cambridge University Press 2012

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References

Alavi, M. 1994. Tectonics of the Zagros orogenic belt of Iran: new data and interpretations. Tectonophysics 229, 211–38.CrossRefGoogle Scholar
Alavi, M. 2004. Regional stratigraphy of the Zagros Fold-Thrust Belt of Iran and its proforeland evolution. American Journal of Science 304, 1–20 CrossRefGoogle Scholar
Allen, M. B., Jackson, J. & Walker, R. 2004. Late Cenozoic reorganization of the Arabia-Eurasia collision and comparison of the short-term and long-term deformation rates. Tectonics 23, TC2008, doi: 10.1029/2003TC001530.Google Scholar
Arvin, M. 1982. The occurrence of pumpellyite in basic igneous rocks from the coloured series NE of Neyriz, Iran. Mineralogical Magazine 9, 427–31CrossRefGoogle Scholar
Authemayou, C., Bellier, O., Chardon, D., Malekzade, Z. & Abassi, M. 2005. Role of the Kazerun fault system in active deformation of the Zagros fold-and-thrust belt, Iran. Comptes Rendus Geoscience 337, 539–45.CrossRefGoogle Scholar
Babaie, H. A., Babaie, A., Ghazi, M. & Arvin, M. 2006. Geochemical, Ar/Ar age and isotopic data for crustal rocks of the Neyriz ophiolite, Iran. Canadian Journal of Earth Sciences 43, 57–70.CrossRefGoogle Scholar
Bailey, C. M. & Eyster, E. L. 2003. General shear deformation in the Pinaleno Mountains metamorphic core complex, Arizona. Journal of Structural Geology 25, 1883–93.CrossRefGoogle Scholar
Berberian, M. & King, G. C. P. 1981. Toward a paleogeography and tectonic evolution of Iran. Canadian Journal of Earth Sciences 18, 210–65.CrossRefGoogle Scholar
Bettelli, G. & Vannucchi, P. 2003. Structural style of the offscraped Ligurian oceanic sequences of the Northern Apennines: new hypothesis concerning the development of mélange block-in-matrix fabric. Journal of Structural Geology 25, 371–88.CrossRefGoogle Scholar
Bobyarchick, A. 1986. The eigenvalues of steady-state flow in Mohr space. Tectonophysics 122, 35–51.CrossRefGoogle Scholar
Bradley, D. C. & Kusky, T. M. 1992. Deformation history of the McHugh Complex, Seldovia Quadrangle, south-central Alaska. In Geological Studies in Alaska by the U.S. Geological Survey 1990 (eds. Bradley, D. C. & Ford, A.), pp. 17–32. U.S. Geological Survey Bulletin 1999.Google Scholar
Byrne, T. 1984. Early deformation in mélange terranes of the Ghost Rocks Formation, Kodiak Islands, Alaska. In Melanges: Their Nature, Origin and Significance (ed. Raymond, L. A.), pp. 21–51. Geological Society of America, Special Paper 198.CrossRefGoogle Scholar
Byrne, T. & Fisher, D. 1990. Evidence for a weak and overpressured decollement beneath sediment dominated accretionary prisms. Journal of Geophysical Research 95, 9081–97.CrossRefGoogle Scholar
Chang, C. P., Angelier, J., Huang, C. Y. & Liu, C. S. 2001. Structural evolution and significance of a mélange in a collision belt: the Lichi Mélange and the Taiwan arc–continent collision. Geological Magazine 138, 633–51.CrossRefGoogle Scholar
Chester, F. M. & Logan, J. M. 1987. Composite planar fabric of gouge from the Punchbowl fault, California. Journal of Structural Geology 9, 621–34.CrossRefGoogle Scholar
Cowan, D. S. 1985. Structural styles in Mesozoic and Cenozoic mélanges in the western Cordillera of North America. Geological Society of American Bulletin 96, 451–62.2.0.CO;2>CrossRefGoogle Scholar
Cowan, D. S. 1990. Kinematic analysis of shear zones in sandstone and mudstone of the Shimanto belt, Shikoku, SW Japan. Journal of Structural Geology 12, 431–41.CrossRefGoogle Scholar
Cowan, D. S. & Brandon, M. T. 1994. A symmetry-based method for kinematic analysis of large slip brittle fault zones. American Journal of Science 294, 257–306.CrossRefGoogle Scholar
Dewey, J. F. 1977. Suture zone complexities: a review. In The Past Distribution of Continents (ed. McElhinny, M. W.). Tectonophysics 40, 53–67.CrossRefGoogle Scholar
Engi, M. & Berger, A. 2006. Formation of mélange in the tectonic accretion channel: geochemical relevance and implications. Goldschmidt Conference Abstracts A161, doi: 10.1016/j.gca.2006.06.1389.Google Scholar
Faghih, A. & Sarkarinejad, K. 2011. Kinematics of rock flow and fabric development associated with shear deformation within the Zagros transpression zone, Iran. Geological Magazine 148, 1009–17.CrossRefGoogle Scholar
Fisher, D. & Byrne, T. 1987. Structural evolution of underthrusted sediments, Kodiak Islands, Alaska. Tectonics 6, 775–93.CrossRefGoogle Scholar
Fitch, T. J. 1972. Plate convergence, transcurrent faults, and internal deformation adjacent to Southeast Asia and the western Pacific. Journal of Geophysical Research 77, 4432–60.CrossRefGoogle Scholar
Fort, A. M. & Bailey, C. M. 2007. Testing the utility of the porphyroclast hyperbolic distribution method of kinematic vorticity analysis. Journal of Structural Geology 29, 983–1001.CrossRefGoogle Scholar
Fossen, H. & Tikoff, B. 1998. Extended models of transpression and transtension, and application to tectonic settings. In Continental Transpressional and Transtensional Tectonics (eds Holdsworth, R. E., Strachan, R. A. & Dewey, J. F.), pp. 15–33. Geological Society of London, Special Publication no. 135.Google Scholar
Fukui, A. & Kano, K. 2007. Deformation process and kinematics of melange in the Early Cretaceous accretionary complex of the Mino-Tamba Belt, eastern southwest Japan. Tectonics 26, TC2006, doi: 10.1029/2006TC001945.CrossRefGoogle Scholar
Haynes, S. J. & McQuillan, H. 1974. Evolution of the Zagros suture zone, Southern Iran. Geological Society of America Bulletin 85, 739–44.2.0.CO;2>CrossRefGoogle Scholar
Haynes, S. J. & Reynolds, P. H. 1980. Early development of Tethys and Jurassic ophiolite displacement. Nature 283, 561–3.CrossRefGoogle Scholar
Holcombe, R. J. & Little, T. A. 2001. A sensitive vorticity gauge using rotated porphyroblasts, and its application to rocks adjacent to the Alpine fault, New Zealand. Journal of Structural Geology 23, 979–89.CrossRefGoogle Scholar
Iacopini, D., Passchier, C. W., Koehn, D. & Carosi, R. 2007. Fabric attractors in general triclinic flow systems and their application to high strain shear zones: a dynamical system approach. Journal of Structural Geology 29, 298–317.CrossRefGoogle Scholar
Ikesawa, E., Kimura, G., Sato, K., Ikehara-Ohmori, K., Kitamura, Y., Yamaguchi, A., Ujiie, K. & Hashimoto, Y. 2005. Tectonic incorporation of the upper part of oceanic crust to overriding plate of a convergent margin: an example from the Cretaceous-early Tertiary Mugi Mélange, the Shimanto Belt, Japan. Tectonophysics 401, 217–30.CrossRefGoogle Scholar
Jones, R. R., Holdsworth, R. E., Clegg, P., McCaffrey, K. & Tavarnelli, E. 2004. Inclined transpression. Journal of Structural Geology 26, 1531–48.CrossRefGoogle Scholar
Kano, K., Nakaji, M. & Takeuchi, S. 1991. Asymmetrical mélange fabric as possible indicators of the convergent direction of plates: a case study from the Shimanto belt of the Akaishi Mountains, central Japan. Tectonophysics 185, 375–88.CrossRefGoogle Scholar
Kargaranbafghi, F., Neubauer, F. & Genser, J. 2011. Cenozoic kinematic evolution of southwestern Central Iran: strain partitioning and accommodation of Arabia–Eurasia convergence. Tectonophysics 502, 221–43CrossRefGoogle Scholar
Kimura, K. 1999. The slip direction of thrust faults. A case study from a chert-clastic sequence in the Mino-Tamba Belt, central Japan. Journal of the Geological Society of Japan 105, 208–26.Google Scholar
Kimura, G. & Mukai, A. 1989. Underplated mélange unit: an example from the Shimanto, Southwest Japan. Earth Monthly (Gekkan Chikyu) 11, 697–709.Google Scholar
Kimura, G. & Mukai, A. 1991. Underplated units in an accretionary complex: mélange of the Shimanto Belt of eastern Shikoku, southwest Japan. Tectonics 10, 31–50.CrossRefGoogle Scholar
Kusky, T. M. & Bradley, D. C. 1999. Kinematic analysis of mélange fabrics: examples and applications from the McHugh Complex, Kenai Peninsula, Alaska. Journal of Structural Geology 21, 1773–96.CrossRefGoogle Scholar
Kusky, T. M., Bradley, D. C. & Haeussler, P. 1997. Progressive deformation of the Chugach accretionary complex, Alaska, during a Paleogene ridge-trench encounter. Journal of Structural Geology 19, 139–57.CrossRefGoogle Scholar
Kusky, T. M., Bradley, D. C., Haeussler, P. & Karl, S. 1997. Controls on accretion of flysch and mélange belts at convergent margins: evidence from The Chugach Bay thrust and Iceworm mélange, Chugach Terrane, Alaska. Tectonics 16, 855–78.CrossRefGoogle Scholar
Kusky, T. M., Robinson, C. & El-Baz, F. 2005. Tertiary and Quaternary faulting and uplift of the Hajar Mountains of Northern Oman and the U.A.E. Journal of the Geological Society, London 162, 1–18.CrossRefGoogle Scholar
Lacombe, O., Mouthereau, F., Kargar, S. & Meyer, B. 2006. Late Cenozoic and modern stress fields in the western Fars (Iran): implications for the tectonic and kinematic evolution of central Zagros. Tectonics 25, TC1003, doi: 10.1029/2005TC001831.CrossRefGoogle Scholar
Lister, G. S. & Snoke, A. W. 1984. S-C mylonites. Journal of Structural Geology 6, 617–38.CrossRefGoogle Scholar
Means, W. D. 1994. Rotational quantities in homogeneous flow and the development of small-scale structures. Journal of Structural Geology 16, 437–46.CrossRefGoogle Scholar
Means, W. D., Hobbs, B. E., Lister, G. S. & Williams, P. F. 1980. Vorticity and noncoaxiality in progressive deformations. Journal of Structural Geology 2, 371–8.CrossRefGoogle Scholar
Merschat, A. J., Hatcher, R. D. & Davis, T. L. 2005. The northern Inner Piedmont, southern Appalachians, USA: kinematics of transpression and SW-directed mid-crustal flow. Journal of Structural Geology 27, 1252–81.CrossRefGoogle Scholar
Mohajjel, M. & Fergusson, C. 2000. Dextral transpression in Late Cretaceous continental collision, Sanandaj–Sirjan Zone western Iran. Journal of Structural Geology 22, 1125–39.CrossRefGoogle Scholar
Moore, J. C. & Silver, E. A. 1987. Continental margin tectonics: submarine accretionary prisms. Review of Geophysics 25, 1305–12.CrossRefGoogle Scholar
Moore, J. C. & Wheeler, R. L. 1978. Structural fabric of a mélange, Kodiak Islands, Alaska. American Journal of Science 278, 739–65.CrossRefGoogle Scholar
Nance, R. D., Gutierrez-Alonso, G., Keppie, J. D., Linnemann, U., Murphy, J. B., Quesada, C., Strachan, R. A. & Woodcock, N. H. 2010. Evolution of the Rheic Ocean. Gondwana Research 17, 194–222.CrossRefGoogle Scholar
Needham, D. T. 1987. Asymmetric extensional structures and their implication for the generation of mélanges. Geological Magazine 124, 311–18.CrossRefGoogle Scholar
Needham, D. T. 1995. Mechanism of mélange formation: examples from SW Japan and southern Scotland. Journal of Structural Geology 17, 971–85CrossRefGoogle Scholar
Needham, D. T. & Mackenzie, J. S. 1988. Structural evolution of the Shimanto Belt accretionary complex in the area of the Gokase River, Kyushu, SW Japan. Journal of the Geological Society, London 145, 85–94.CrossRefGoogle Scholar
Niwa, M. 2006. The structure and kinematics of an imbricate stack of oceanic rocks in the Jurassic accretionary complex of Central Japan: an oblique subduction model. Journal of Structural Geology 28, 1670–84.CrossRefGoogle Scholar
Onishi, T. C. & Kimura, G. 1995. Mélange fabrics and relative convergence in subduction zone. Tectonics 14, 1273–89.CrossRefGoogle Scholar
Onishi, C. T., Kimura, G., Hashimoto, Y., Ikehara-Ohmori, K. & Watanabe, T. 2001. Deformation history of tectonic mélange and its relationship to the underplating process and relative plate motion: an example from the deeply buried Shimanto Belt, SW Japan. Tectonics 20, 376–93.CrossRefGoogle Scholar
Parlak, O. & Delaloye, M. 1999. Precise Ar/Ar ages from the metamorphic sole of the Mersin ophiolite, Southern Turkey. Tectonophysics 301, 145–58.CrossRefGoogle Scholar
Passchier, C. W. & Trouw, R. A. J. 2005. Microtectonics. Berlin: Springer-Verlag, 366 pp.Google Scholar
Raharimahefa, T. & Kusky, T. 2006. Structural and remote sensing studies of the southern Betsimisaraka Suture, Madagascar. Gondwana Research 10, 186–97.CrossRefGoogle Scholar
Regard, V., Bollier, O., Thomas, J. C., Abbasi, M. R., Mercier, J., Shabanian, E., Feghhi, K. & 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 deformation system. Tectonics 23, TC4007, doi: 10.1029/2003TC001599.CrossRefGoogle Scholar
Ricou, L. E. 1968 a. Sur la mise en place au Cretace Superieur d'importantes nappes a radiolarites et ophiolites dans les Monts Zagros (Iran). Comptes Rendus de l'Académie des Sciences (D) 267, 2272–5.Google Scholar
Ricou, L. E. 1968 b. Une coupe a travers les series a radiolarites des Monts Pichakun (Zagros, Iran). Bulletin de la Société géologique de France 10, 478–85.CrossRefGoogle Scholar
Ricou, L. E. 1971. Le croissant ophiolitique péri-arabe. Une ceinture de nappes mises en place au Crétacé supérieur. Revue de Géographie Physique et de Géologie Dynamique XIII, 327–50.Google Scholar
Robertson, A. H. F. & Ustaomer, T. 2011. Role of tectonic-sedimentary melange and Permian–Triassic cover units, central southern Turkey in Tethyan continental margin evolution. Journal of Asian Earth Sciences 40, 98–120.CrossRefGoogle Scholar
Rutter, E. H., Maddock, R. H., Hall, S. H. & White, S. H. 1986. Comparative microstructures of natural and experimentally produced clay-bearing fault gouges. Pure and Applied Geophysics 124, 3–30.CrossRefGoogle Scholar
Sanderson, D. J. & Marchini, W. R. D. 1984. Transpression. Journal of Structural Geology 6, 449–58.CrossRefGoogle Scholar
Saki, A. 2010. Proto-Tethyan remnants in northwest Iran: geochemistry of the gneisses and metapelitic rocks. Gondwana Research 17, 704–14.CrossRefGoogle Scholar
Sarkarinejad, K. 2003.Structural and microstructural analysis of a Palaeo-transform fault zone in the Neyriz ophiolite, Iran. In Ophiolites in Earth History (eds Dilek, Y. & Robinson, P. T.), pp. 129–45. Geological Society of London, Special Publication no. 218.Google Scholar
Sepehr, M. & Cosgrove, J. W. 2005. Role of the Kazerun fault zone in the formation and deformation of the Zagros Fold-Thrust Belt, Iran. Tectonics 24, TC5005, doi: 10.1029/2004TC001725.CrossRefGoogle Scholar
Shafaii Moghadam, H., Stern, R. J. & Rahgoshay, M. 2010. The Dehshir ophiolite (central Iran): geochemical constraints on the origin and evolution of the Inner Zagros ophiolite belt. Geological Society of America Bulletin 122, 1516–47.CrossRefGoogle Scholar
Shahabpour, J. 2005. Tectonic evolution of the orogenic belt in the region located between Kerman and Neyriz. Journal of Asian Earth Sciences 24, 405–7.CrossRefGoogle Scholar
Shahabpour, J. 2007. Island-arc affinity of the Central Iranian Volcanic Belt. Journal of Asian Earth Sciences 30, 652–65.CrossRefGoogle Scholar
Simpson, C. & De Paor, D. G. 1993. Strain and kinematic analysis in general shear zones. Journal of Structural Geology 15, 1–20.CrossRefGoogle Scholar
Stöcklin, J. 1968. Structural history and tectonics of Iran: a review. American Association of Petroleum Geologists Bulletin 52, 1229–58.Google Scholar
Stöcklin, J. 1974. Possible ancient continental margins in Iran. In The Geology of Continental Margins (eds Burk, C. E. & Drake, C. L.), pp. 873–88. New York: Spring-Verlag.CrossRefGoogle Scholar
Talebian, M. & Jackson, J. 2002. Offset on the Main Recent Fault of NW Iran and implications for late Cenozoic tectonics of the Arabia–Eurasia collision zone. Geophysical Journal International 150, 422–39.CrossRefGoogle Scholar
Tatar, M., Hatzfeld, D. & Ghafory-Ashtiyani, M. 2004. Tectonics of the Central Zagros (Iran) deduced from microearthquake seismicity. Geophysical Journal International 156, 255–66.CrossRefGoogle Scholar
Teyssier, C., Tikoff, B. & Markley, M. 1995. Oblique plate motion and continental tectonics. Geology 23, 447–50.2.3.CO;2>CrossRefGoogle Scholar
Tikoff, B. & Fossen, H. 1995. Limitation on three dimensional kinematic vorticity analyses. Journal of Structural Geology 17, 1771–81.CrossRefGoogle Scholar
Tikoff, B. & Teyssier, C. 1994. Strain and fabric based on porphyroclast interaction. Journal of Structural Geology 16, 477–91.CrossRefGoogle Scholar
Ujiie, K. 1997. Off-scraping accretionary process under the subduction of young oceanic crust: the Shimanto Belt of Okinawa Island, Ryukyu Arc. Tectonics 16, 305–22.CrossRefGoogle Scholar
Ujiie, K. 2002. Evolution and kinematics of an ancient decollement zone, mélange in the Shimanto accretionary complex of Okinawa Island, Ryukyu Arc. Journal of Structural Geology 24, 937–52.CrossRefGoogle Scholar
Vernant, P., Nilforoushan, F., Hatzfeld, D., Abbasi, M. R., Vigny, C., Masson, F., Nankali, H., Martinod, J., Ashtiani, A., Bayer, R., Tavakoli, F. & Chery, J. 2004. Present-day crustal deformation and plate kinematics in the Middle East constrained by GPS measurement in Iran and northern Oman. International Journal of Geophysics 157, 381–98.CrossRefGoogle Scholar
Waldron, J. F., Turner, D. & Stevens, K. M. 1988. Stratal disruption and development of mélange, western Newfoundland: effect of high fluid pressure in an accretionary terrain during ophiolite emplacement. Journal of Structural Geology 10, 861–73.CrossRefGoogle Scholar
Xypolias, P. 2009. Some new aspects of kinematic vorticity analysis in naturally deformed quartzites. Journal of Structural Geology 31, 3–10.CrossRefGoogle Scholar