The most enigmatic problems with the nearly 200 salt domes pierced in the Persian Gulf and in the Zagros Mountain Ranges (ZMR) in southern Iran, a unique morphology in the world, have been the matter of this study, which is based on a combination of field work, enhancement of satellite and aerial photographs etc. In the ZMR, structural anomalies are frequently associated with similar facies distribution patterns. In the eastern portion of the region, emergent salt plugs of Infra-Cambrian age exhibit the same alignment patterns. Such trends bear no apparent genetic relationship to the Tertiary folding responsible for the present Zagros fold belt, but rather indicate their affinity with linear basement features which are readily observable on Land sat imagery and aerial photographs. Bending of anticlines in the competent cover rock, combined with minor strike-slip faults and horizontal displacements of parts of folded structures, strongly point to the presence of these basement faults. The salt plugs, which have pierced cover rocks of up to 10000 m thick, are distributed on the Arabian Platform along regional basement faults. The area of diapir outcrops is bounded by the Oman Line to the east and by the Kazerun fault to the west. Pieces of the basement have been brought up to the surface on some of the salt domes. The fragments were transported by rotational ascent of the Hormuz Salt Formation to the present and former land surfaces. The recognition of features related to basement tectonics and realization of their implication in the control and modification of geological processes are important adjuncts to the search for hydrocarbon accumulations in this region. To our best knowledge, data of basement faults in the study area are scarce. Therefore, this study was carried out to determine basement faults and their relation to salt dome distribution. Considering the fold axes bending, the trend of the salt plugs and also the distribution of epicenters of the last century, n umerous new basement faults are introduced in this paper.
Pierced, Salt plugs, Zagros Fold Belt, Southeastern Iran, Kazerun fault.
Ala, M.A., 1974. Salt diapirism in Southern Iran, American Association Petroleum Geologists Bulletin, 58(9): 1758-1770.
Belderson, R.H., N.H. Kenyon and A.H. Stride, 1978. Local submarine salt-karst formation on the hellenic outer ridge, Eastern mediterranean. Geology, 8(6): 716 – 720.
Bjørlykke, K.O., 1989. Sedimentology and petroleum geology, translated of lærebok in sedimentologi og petroleums geologi, by beverly wahl. New York: Springer-Verlag Berlin Heidelberg.
Bloom, A.L., 2002. Geomorphology, a systematic analysis of late cenozoic landforms. 3rd Edn., New Delhi: Prentice-Hall of India, Private Limited.
Böckh, H.d., G.M. Lees and F.D.S. Richardson, 1929. Contribution to the stratigraphy and tectonics of the Iranian ranges, in J. W. Gregory, editor, The structure of Asia, London, Methuen.
Bosak, P., J. Jaros, J. Spudil, P. Sulovsky and V. Vaclavek, 1998. Salt plugs in the Eastern Zagros, Iran: Results of Regional Geological Reconnaissance, GeoLines (Praha).
Bostrom, R.C., 1985. Zonal wrenching in the tethys orogeny, geodynamics research symposium. Texas: A & M Univ.
Busk, H.G. and H.T. Mayu, 1918. Some notes on the geology of the Persian oil fields, Geological Institute of Petroleum Technology, 5(3): 3-33.
Derakhshani, R. and G. Farhoudi, 2005. Existence of the oman line in the empty quarter of Saudi Arabia and its continuation in the red sea, Journal of Applied Sciences, 5(4): 745-752.
Falcon, N.L., 1967; 1969. The geology of the northeast margin of the Arabian basement shield, British Association Advanced Society, 24(5): 31-42.
Falcon, N.L., 1969. Problems of the relationship between surface structure and deep displacements illustrated by the zagros range, In: P. Kent, G. Satterthwaite and A. Spencer (Eds.), Time and Place orogeny, Geological Society of London.
Falcon, N.L., 1974. Southern Iran: Zagros mountains, in Mesozoic-Cenozoic orogenic belts: Data for orogenic studies: Alpine-Himalayan Orogens, Geological Society London, Special Publication.
Farhoudi, G., 1978. A comparison of zagros geology to Island Arcs, Journal of Geology, 86(4): 325-334.
Farhoudi, G., 1984. Some morphotectonic aspect about the frequent earthquakes in the southern part of the Zagros mountains Iran, 27th International Geological Congress Moscow.
Farhoudi, G., A. Faghih, H. Mosleh, T. Keshavarz, M.R. Heyhat and J. Rahnama-Rad, 2008. Using GIS/RS techniques to interpret different aspects of salt domes in Southern Iran, Geophysical Research Abstracts : EGU-A-06522, 10.
Farhoudi, G. and M. Ghazizadeh, 1993. Stages of karst geomorphology cycle in the Zagros mountain ranges, Iran, Proceeding of International Symposium of Water Resources in karst with special emphasis on arid and semi-arid zones, jointly organized by UNESCO and Iranian authorities, Shiraz, Iran.
Fredrich, J.T., A.F. Fossum and R.J. Hickman, 2007. Mineralogy of deepwater Gulf of Mexico salt, formations and implications for constitutive behavior, Journal of Petroleum Science and Engineering, 57(3–4): 354-374.
Friedrichs, C.T. and J.E. Perry, 2001. Tidal salt marsh morphodynamics: A synthesis. Journal of Coastal Research, 27(1): 7-37.
Fürst, M., 1990. Strike-slip faults and diapirism of the southeastern Zagros ranges. Proceeding symposium on diapirism with special reference to Iran, Geol. Survey Iran. Tehran, pp: 149-182.
Gansser, A., 1960. Über schlammvulkane und salzdome, Vierteljahrss chrift Naturforschenden Geselschaft Zurich, 105(3): 1-46.
Goudie, A.S., 1989. Salt tectonics and geomorphology, Progress in Physical Geography, SAGE Publications, 13(4): 597-605.
Harding, T.P. and J.D. Lowell, 1979. Structural styles, their plate- tectonic habitats and hydrocarbon traps in petroleum provinces. American Association Petroleum Geologists Bulletin, 63(5): 1016-1058.
Haynes, S.J. and H. McQuillan, 1974. Evolution of the Zagros suture zone, Southern Iran, Geological Society American Bulletin, 85(5): 739-744.
Humphrey, W.E., 1958. Diapirs and diapirism in Persia and North Africa, American Association petroleum Geologists Bulletin, 42(7): 1736-1744.
Jackson, M.P.A. and C.J. Talbot, 1986. External shapes, strain rates, and dynamics of salt structures. Geological Society American Bulletin, 97(3): 305-323.
Jacob, H. and K. Quittmeyer, 1979. The Makran region of Pakistan and Iran, Trench-arc system with active plate subduction. In FARAH, A., de JONGH, K.A. (editors.): Geodynamics of Pakistan. Geological Survey Pakistan. pp: 305-317.
James, G.A. and J.G. Wynd, 1965. Stratigraphic nomenclature of Iranian oil consortium agreement area, American Association Petroleum Geologists Bulletin, 49(6): 2182-2245.
Kashfi, M.S., 1976. . Plate tectonics and structural evolution of the Zagros geosyncline, southwestern Iran, Geological Society American Bulletin, 87(10): 1486-1490.
Kent, P.E., 1958. Recent studies of south Persian salt plugs, American Association Petroleum Geologists Bulletin, 42(12): 2951-2972.
Kent, P.E., 1979. The mergent Hormuz salt plugs of Southern Iran, Jour. Petroleum Geology, 2(2): 117-144.
Kent, P.E., 1979; 1986. Island salt plugs in the middle east and their tectonic implications, In dynamic geology of salt and related structures, Ed: Leiche I. & O'Brien J. J., Academic Press, NY. pp: 3-37.
Lawrence, D.S.L., J.R.L. Allen and G.M. Havelock, 2004. Salt marsh morphodynamics: An investigation of tidal flows and marsh channel equilibrium. Journal of Coastal Research, 20(1): 301- 316.
Lees, G.M., 1927. Salzgletscher in Persien, Wien Mitteitung Geologische Gesellschaft, 20(1): 29-34.
Letouzey, J. and S. Sherkati, 2004. Salt movement, tectonic events, and structural style in the central zagros fold and thrust belt (Iran), In Salt sediments interactions and hydrocarbon prospectively, 24th Annual Gulf Coast Section SEP Foundation, Bob.
Martinod, J., A. Ashtiani, R. Bayer, F. Tavakoli and J. Chery, 2004. Present-day crustal deformation and plate kinematics in the Middle East constrained by GPS measurements' in Iran and Northern Oman, Geophysical Journal Institute, 157(3): 381- 398.
McQuillan, H., 1991. The role of basement tectonics in the control of sedimentary facies, structural patterns and salt plug emplacements in the Zagros fold belt of Southwest Iran, Journal of Southeast Asian Earth Sciences, 5(4): 453-463.
Motiei, H., 1990. The role of diapirism from the stand point of hydrocarbon reserves in South-West Iran, proceeding symposium on diapirism with special reference to Iran, 1, 138. Geol. Survey Iran. Tehran.
Nowroozi, A.A., 1971. Seismo-tectonics of the Persian plateau Eastern Turkey, Caucasus, and Hindu-Kush regions, Bulletin Seismological Society America, 61(2): 317-341.
Nowroozi, A.A., 1972. Focal mechanism of earthquakes in Persia, Turkey, West Pakistan, and Afghanistan and plate tectonics of the middle east, Bulletin Seismological Society America. N.I.O.C. (National Iranian Oil Company), 1977, Tectonic map of Iran, National Iranian Oil Company, 62(7): 823-850.
Pilgrim, G.E., 1908. The geology of the Persian Gulf and the adjoining portions of Persia and Arabia, Mem. Geol. Survey India, 34(4): 1-177.
Pilgrim, G.E., 1922. The Sculpture deposits of southern Persia, India Geol. Survey Research, 53(3): 343-358.
Pilgrim, G.E., 1924. The geology of parts of the Persian provinces of fars, Kerman and Laristan, Mem. Geol. Survey India, 48(1): 1-118.
Player, R.A., 1967. A note on the Fars salt plugs, N.I. O. C., Private Report.
Player, R.A., 1969. Salt plug study, N. I. O. C., Report, 1146.
Rabinowitz, P.D., M.F. Coffin and D. Falvey, 1982. Salt diapirs bordering the continental margin of northern Kenya and southern Somalia, Science, 21(5): 663 – 665.
Rahnama-Rad, J., R. Derakhshani, G. Farhoudi and M. Ghorbani, 2008. Basement faults und salt plug emplacement in the Arabian platform in southern Iran, Journal of Applied Science, 8(18): 3235-3241.
Richardson, R.K., 1926. Die geologie und die salzdome imsudwestlichen teil des persischen golfes, verhandlung naturhistorische medizin verein heidelberg (NF), Nummer 15, 51 Seite.
Richardson, R.K., 1928. Weitere bemerkungen zu der geologie und den salzaufbruchen am persischen golf, centralblat mineralogie, Geologie u. Paläontologie Abteitung B: 45-49.
Ross, D.A., R.B. Whitmarsh, S.A. Ali, J.E. Boudreaux, R. Coleman, R.L. Fleisher, R. Girdler, F. Manheim, A. Matter, C. Nigrini, P. Stoffers and P.R. Supko, 1973. Red sea drillings. Science, 17(3): 377-380.
Schoenherr, J.U., L.K. Janos, A. Peter, R. Littke, Z. Schléder, J.-M. Larroque, M.J. Newall, N. Al-Abry, H.A. Al-Siyabi and Z. Rawahi, 2007. Limits to the sealing capacity of rock salt: A case study of the infra-Cambrian Ara Salt from the South Oman salt basin, American Association Petroleum Geologists Bulletin, 91(11): 1541-1557.
Seni, S.J. and M.P.A. Jackson, 1983a. Evolution of salt structures, east texas diapir province; Part 1, Sedimentary Record of Halokinesis, 67(4): 1219-1244.
Seni, S.J. and M.P.A. Jackson, 1983b. Evolution of salt structures, east texas diapir province; part 2, patterns and rates of halokinesis. American Association Petroleum Geologists Bulletin, 67(5): 1245 – 1274.
Standridge, D., C. Bishop and L. Serpa, 2005. A high- resolution seismic survey to image the top of salt at Avery Island, Louisiana, SEG( Society of Exploration Geophysicists) Technical Program Expanded Abstracts: 1160-1163.
Stöcklin, J. and M.H. Nabavi, 1975. Tectonic map of Iran, 1: 2500000, Geological Society Iran.
Talbot, C.J. and M. Alavi, 1996. The post of a future syntaxis across the Zagross, in Alsop, G. I., Blunell, D.J. & Davison, J. (eds), salt tectonics: Geological Society London, Special Publication, 100(1): 89–109.
Talbot, C.J. and M.P.A. Jackson, 1987. Internal kinematics of salt diapirs. American Association Petroleum Geologists Bulletin, 71(5): 1068–1093.
Talbot, C.J. and E.A. Rogers, 1980. Seasonal movements in a salt glacier in Iran, Science, 20(4): 395–397.
Tchalenko, J.S. and J. Braud, 1974. Seismicity and structure of the Zagros (Iran), the main recent fault between 33o and 35o N, London Philos. Trans., Serie A., 27(7): 1-25.
Trusheim, F., 1960. Mechanism of salt migration in northern Germany, American Association Petroleum Geologists Bulletin, 44(5): 1519–1540.
Vernant, P., F. Nilforoushan, D. Hatzfeld, M.R. Abbassi, C. Vigny, F. Masson, H. Nankali, J. Martinod, A. Ashtiani, R. Bayer, F. Tavakoli and J. Chéry, 2004. Present- day crustal deformation and plate kinematics in the middle east constrained by GPS measurements in Iran and northern Oman, Geophysical Journal International, 15(3): 381- 398.
Woodbury, H.O., I.B. Murray and R.E. Osborne, 1980. Diapirs and their relation to hydrocarbon accumulation, in: A. D. Miall, (ed)., Fact and principles of world petroleum occurrence: Calgary, Canadian Society of Petroleum Geologists.
This study received no specific financial support.
The author declares that there are no conflicts of interests regarding the publication of this paper.