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Durham University

Department of Earth Sciences

Postgraduate Students

Publication details for Prof Mark Allen

Blanc, E.J-P, Allen, M.B, Inger, S & Hassani, H (2003). Structural styles in the Zagros Simple Folded Zone, Iran. Journal of the Geological Society 160(3): 401-412.

Author(s) from Durham

Abstract

Arabia每Eurasia convergence is achieved in the NW Zagros by a combination of shortening on NW每SE-trending folds and thrusts, mainly in the Simple Folded Zone, and by right-lateral strike-slip on the NW每SE-trending Main Recent Fault. A balanced and restored cross-section across this part of the range indicates c. 49 km of shortening. This probably occurred since c. 5 Ma, providing an estimate of the long-term shortening rate across the Simple Folded Zone of c. 10 mm a-1. The geometries of exposed structures suggest both basement thrusts and thin-skinned dlement levels, with major folds possibly nucleated above basement faults. Fold geometries indicate several dlement horizons; shale units are candidates, as well as evaporites in the Neogene, Mesozoic, Lower Palaeozoic and upper Proterozoic successions. The SE part of the Simple Folded Zone deforms by north每south shortening on broadly east每west-trending folds and thrusts. The link between these regions occurs via a set of fault blocks c. 400 km wide in total, each bounded by north每south right-lateral faults. Incremental changes in the strike of some of the folds occur across these right-lateral faults, with more east每west orientations to the east.

References

Alavi, M. 1994. Tectonics of the Zagros orogenic belt of Iran: new data and
interpretations. Tectonophysics, 239, 211每238.
Al-Husseini, M.I. 2000. Origin of the Arabian plate structures: Amar collision and
Najd rift. GeoArabia, 5, 527每542.
Allen, M.B., Vincent, S.J. & Wheeler, P.J. 1999. Late Cenozoic tectonics of
the Kepingtage thrust zone: interactions of the Tien Shan and Tarim Basin,
northwest China. Tectonics, 18, 639每654.
Allen, M.B., Jones, S., Ismail-Zadeh, A., Simmons, M.D. & Anderson, L.
2002. Onset of subduction as the cause of rapid Pliocene每Quaternary
subsidence in the South Caspian Basin. Geology, 30, 775每778.
Ameen, M.S. 1992. Effect of basement tectonics on hydrocarbon generation,
migration and accumulation in northern Iraq. AAPG Bulletin, 76, 356每370.
Baker, C., Jackson, J. & Priestley, K. 1993. Earthquakes on the Kazerun Line
in the Zagros Mountains of Iran: strike-slip faulting within a fold-and-thrust
belt. Geophysical Journal International, 115, 41每61.
Berberian, M. 1995. Master &blind* thrust faults hidden under the Zagros folds:
active basement tectonics and surface morphotectonics. Tectonophysics, 241,
193每224.
Beydoun, Z.R., Hughes Clarke, M.W. & Stoneley, R. 1992. Petroleum in the
Zagros Basin: a late Tertiary foreland basin overprinted onto the outer edge
of a vast hydrocarbon-rich Paleozoic每Mesozoic passive-margin shelf. In:
MacQueen, R. & Leckie, D. (eds) Foreland Basins and Foldbelts. Memoirs,
American Association of Petroleum Geologists, 55, 309每339.
Butler, R.W.H. 1983. Balanced cross-sections and their implications for the deepstructure
of the northwest Alps. Journal of Structural Geology, 5, 125每137.
Coleman-Sadd, S.P. 1978. Fold development in Zagros simple folded belt, SW
Iran. AAPG Bulletin, 62, 984每1003.
Cosgrove, J.W. & Ameen, M.S. 2000. A comparison of the geometry, spatial
organisation and fracture patterns associated with forced folds and buckle
folds. In: Cosgrove, J.W. & Ameen, M.S. (eds) Forced Folds and Fractures.
Geological Society, London, Special Publications, 169, 7每21.
DeMets, C., Gordon, R.G., Argus, D.F. & Stein, S. 1994. Effects of recent
revisions to the geomagnetic time scale on estimates of current plate motions.
Geophysical Research Letters, 21, 2191每2194.
Devlin, W. & Cogswell, J. et al.1999. South Caspian Basin: young, cool, and
full of promise. GSA Today, 9, 1每9.
Engdahl, E.R., van der Hilst, R. & Buland, R. 1998. Global teleseismic
earthquake relocation with improved travel times and procedures for depth
determination. Bulletin of the Seismological Society of America, 88, 722每743.
Falcon, N. 1974. Southern Iran: Zagros mountains. In: Spencer, A. (ed.)
Mesozoic每Cenozoic Orogenic Belts: Data for Orogenic Studies. Geological
Society, London, Special Publications, 4, 199每211.
Gansser, A. 1992. The enigma of the Persian salt dome intrusions. Eclogae
Geologicae Helveticae, 85, 825每846.
Hessami, K., Koyi, H.A. & Talbot, C.J. 2001a. The significance of strike-slip
faulting in the basement of the Zagros fold and thrust belt. Journal of
Petroleum Geology, 24, 5每28.
Hessami, K., Koyi, H.A., Talbot, C.J., Tabasi, H. & Shabanian, E. 2001b.
Progressive unconformities within an evolving foreland fold每thrust belt,
Zagros Mountains. Journal of the Geological Society, London, 158, 969每981.
Homewood, P., Allen, P.A. & Williams, G.D. 1986. Dynamics of the molasse
basin of western Switzerland. In: Allen, P.A. & Homewood, P. (eds)
Foreland Basins. International Association of Sedimentologists Special
Publications, 8, 199每217.
Husseini, M.I. 1989. Tectonic and deposition model of Late Precambrian Cambrian
Arabian and adjoining plates. AAPG Bulletin, 73, 1117每1131.
Iran Oil Operating Companies 1969. Geological Map of South-West Iran, scale
1:1 000 000. Iran Oil Operating Companies, Tehran.
Jackson, J. & McKenzie, D. 1984. Active tectonics of the Alpine每Himalayan belt
between western Turkey and Pakistan. Geophysical Journal of the Royal
Astronomical Society, 77, 185每264.
Jackson, J. & McKenzie, D. 1988. The relationship between plate motion and
seismic moment tensors, and the rates of active deformation in the
Mediterranean and Middle East. Geophysical Journal of the Royal Astronomical
Society, 93, 45每73.
Jackson, J.A. 1980. Reactivation of basement faults and crustal shortening in
orogenic belts. Nature, 283, 343每346.
Jackson, J.A., Priestley, K., Allen, M. & Berberian, M. 2002. Active tectonics
of the South Caspian Basin. Geophysical Journal International, 148, 214每
245.
James, G.A. & Wynd, J.G. 1965. Stratigraphic nomenclature of the Iranian oil
consortium agreement area. AAPG Bulletin, 49, 2182每2245.
Kent, P.E. 1979. The emergent Hormuz salt plugs of southern Iran. Journal of
Petroleum Geology, 2, 117每144.
Kocyigit, A., Yilmaz, A., Adamia, S. & Kuloshvili, S. 2001. Neotectonics of
East Anatolian Plateau (Turkey) and Lesser Caucasus: implication for
transition from thrusting to strike-slip faulting. Geodinamica Acta, 14,
177每195.
Koop, W.J. & Stoneley, R. 1982. Subsidence history of the Middle East Zagros
Basin, Permian to Recent. Philosophical Transactions of Royal Society of
London, A305, 149每168.
Llewellyn, P.G. 1972. Ahwaz Geological Map, scale 1:100 000. Iranian Oil
Operating Companies, Tehran.
Llewellyn, P.G. 1973. Dezful Geological Map, scale 1:250 000. Iranian Oil
Operating Companies, Tehran.
Macedo, J. & Marshak, S. 1999. Controls on the geometry of fold每thrust belt
salients. Geological Society of America Bulletin, 111, 1808每1822.
MacLeod, J. 1970. Kabir Kuh Geological Map, scale 1:100 000. Iranian Oil
Operating Companies, Tehran.
MacLeod, J. & Roohi, M. 1972. Mehran Geological Map, scale 1:100 000. Iranian
Oil Operating Companies, Tehran.
Maggi, A., Jackson, J.A., Priestley, K. & Baker, C. 2000. A reassessment of
focal depth distributions in southern Iran, the Tien Shan and northern India:
do earthquakes really occur in the continental mantle? Geophysical Journal
International, 143, 629每661.
McClusky, S. et al. 2000. Global positioning system constraints on plate
kinematics and dynamics in the eastern Mediterranean and Caucasus. Journal
of Geophyical Research, 105, 5695每5719.
McQuillan, H. 1991. The role of basement tectonics in the control of
sedimentary facies, structural patterns and salt plug emplacements in the
Zagros foldbelt of southwest Iran. Journal of Southeast Asian Earth Sciences,
5, 453每463.
Mina, P., Razaghnia, M.T. & Paran, Y. 1967. Geological and geophysical
studies and exploratory drilling of the Iranian continental shelf〞Persian Gulf.
In: Proceedings of the 7th World Petroleum Congress, Mexico. Elsevier,
871每903.
Mun˜ oz, J.A. 1992. Evolution of a continental collision belt: ECORS〞Pyrenees
crustal balanced cross-section. In: McClay, K.R. (ed.) Thrust Tectonics.
Chapman and Hall, London, 235每246.
Murris, R.J. 1980. Middle East: stratigraphic evolution and oil habitat. AAPG
Bulletin, 64, 597每618.
National Iranian Oil Company 1975a. Geological Cross-sections South每
Central Iran (1:500 000). National Iranian Oil Company, Tehran.
National Iranian Oil Company 1975b. Geological Map of Iran Sheet No. 4
South-West Iran, scale 1:1 000 000. National Iranian Oil Company, Tehran.
National Iranian Oil Company 1977a. Geological Map of Iran Sheet No. 4
South每Central Iran, scale 1:1 000 000. National Iranian Oil Company,
Tehran.
National Iranian Oil Company 1977b. Geological Map of Iran Sheet No. 4
South-East Iran, scale 1:1 000 000. National Iranian Oil Company, Tehran.
Oberlander, T. 1965. The Zagros Streams. Syracuse Geographical Series, 1.
Pattinson, R. & Takin, M. 1971. Geological Significance of the Dezful
Embayment Boundaries. Iranian Oil Operating Companies Geological and
Exploration Division Report, 1166.
Rowan, M.G. & Linares, R. 2000. Fold-evolution matrices and axial-surface
analysis of fault-bend folds: application to the Medina anticline, eastern
Cordillera, Colombia. AAPG Bulletin, 84, 741每764.
Sattarzadeh, Y., Cosgrove, J.W. & Vita-Finzi, C. 2000. The interplay of
faulting and folding during the evolution of the Zagros. In: Cosgrove, J.W.
& Ameen, M.S. (eds) Forced Folds and Fractures. Geological Society,
London, Special Publications, 169, 187每196.
Searle, M.P., James, N.P., Calon, T.J. & Smewing, J.D. 1983. Sedimentological
and structural evolution of the Arabian continental margin in the Musandam
mountains and Dibba Zone, United Arab Emirates. Geological Society of
America Bulletin, 94, 1381每1400.
Sella, G.F., Dixon, T.H. & Mao, A. 2002. REVEL: a model for recent plate
velocities from space geodesy. Journal of Geophysical Research, 107(11),
1每30.
Sengo“ r, A.M.C. & Kidd, W.S.F. 1979. Post-collisional tectonics of the Turkish每
Iranian plateau and a comparison with Tibet. Tectonophysics, 55, 361每376.
Sengo“ r, A.M.C. & Natal*in, B.A. 1996. Paleotectonics of Asia: fragments of a
synthesis. In: Yin, An & Harrison, T.M. (eds) The Tectonic Evolution of
Asia. Cambridge University Press, Cambridge, 486每640.
Sengo“ r, A.M.C., Altiner, D., Cin, A., Ustaomer, T. & Hsu, K.J. 1988. Origin
and assembly of the Tethyside orogenic collage at the expense of Gondwana
Land. In: Audley-Charles, M.G. & Hallam, A. (eds) Gondwana and
Tethys. Geological Society, London, Special Publications, 37, 119每181.
Sharland, P.R. & Archer, R. et al.2001. Arabian Plate Sequence Stratigraphy.
GeoArabia, Manama, Bahrain.
Sto“cklin, J. 1968. Structural history and tectonics of Iran. AAPG Bulletin, 52,
1229每1258.
Stoneley, R. 1981. The geology of the Kuh-e Dalneshin area of southern Iran and
its bearing on the evolution of southern Tethys. Journal of the Geological
Society, London, 138, 509每526.
Stoneley, R. 1990. The Arabian continental margin in Iran during the Late
Cretaceous. In: Robertson, A., Searle, M. & Ries, A. (eds) The Geology
and Tectonics of the Oman Region. Geological Society, London, Special
Publications, 49, 787每795.
Talbot, C.J. & Alavi, M. 1996. The past of a future syntaxis across the Zagros.
In: Alsop, G.I., Blundell, D.J. & Davison, I. (eds) Salt Tectonics.
Geological Society, London, Special Publications, 100, 89每109.
Talebian, M. & Jackson, J.A. 2002. Offset on the Main Recent Fault of NW Iran
and implications for the late Cenozoic tectonics of the Arabia每Eurasia
collision zone. Geophysical Journal International, 150, 422每439.
Tatar, M., Hatzfeld, D., Martinod, J., Walpersdorf, A., Ghafori-Ashtiany,
M. & Che´ry, J. 2003. The present-day deformation of the central Zagros
from GPS measurements. Geophysics Research Letters, in press.
Westaway, R. & Arger, J. 1996. The Golbasi basin, southeastern Turkey: a
complex discontinuity in a major strike-slip fault zone. Journal of the
Geological Society, London, 153, 729每743.
Yilmaz, Y. 1993. New evidence and model on the evolution of the southeast
Anatolian orogen. Geological Society of America Bulletin, 105, 251每271.