Scientific Quarterly Journal of Geosciences

Scientific Quarterly Journal of Geosciences

Sedimentary petrology and depositional environments of the Lower Permian (Dorud Formation) clastic rocks in the Alborz region

Author
Islamic Azad University, Sari Division, Sari, Iran
Abstract
The Lower Permian rocks of the Alborz region (Jolfa, Abyeik, Bibi Shahrbanu, Amol, Mighan and Ghaznavi) were studied to define their facies and depositional environments. The Lower Permian rocks of the Alborz area are composed of thick clastic (conglomerate, sandstone, siltstone and shales) and carbonate (limetstone) facies. In some places (Amol) about 365 meters of sediments have been deposited during Asselian to Sakmarian time.
The Lower Permian rocks of the Alborz region are characterized by the clastic sediments of the Dorud Formation. Facies analysis of more than 100 thin sections and 15 polished samples led to the recognition of several clastic facies. The clastic rocks of the Dorud Formation (units 1 and 3) were deposited in a continental (meandering river) and transitional (deltaic and beach) environments.
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Ahmadzadeh Heravi, M.,1971, Stratigraphische und Palaeontologishe untersuchungen im unterkarbon des Zentral Elburz (Iran) Glausthaler Geol. Abh. 7, P.1-104.
Alavi Naini, M., Hajlan, J., Amidi, M. and Bolourchi, H., 1982, Geology of Takab Shahin Dezh, 1: 250000, Geol. surv. Iran, Rep. No.50, P.34-41.
 Alvai Naini, M., 1972, Etude geologique de la region de Djam: Geol. Sut. Iran, Rep. NO. 23, P, 78-91.
Allen, J., R., L., 1965, A review of the origin and characteristics of recent alluvial sediments., Sedimentology, V.5, P.89-191.
Assereto, R., 1963, The Paleozoic formations in Central Elburz (Iran) Preliminary note: Rive. Ital, Paleont. Stratgr., V. 69, No. 4, P. 503-543.
Bolourchi, M., H., 1977, Etude geologique de la region d'Avad]: These de doct, Univ. de Grenoble, Geol. Surv, Iran., Rep. No. 45, P.50-60.
Coleman, J.M. and Prior, D.B., 1982, Deltaic environments of deposition: In P. A. Scholle and D. Spearing, eds. Sandstone Depositional Environments: AM. Asso, Petroleum. Geologists, Mem. 31, P. 139-178.
Collinson, J.D., 1991, Alluvial Sediments, In: H.G.Reading (editor), sedimentary Environments and Facies, Blackwell Scientific Publ. P. 20-62. Collinson, J.D. & Thompson, D.B, 1989, Sedimentray Structures,Vnwin Hyman, London, 207 P.
Davies, R.G., Jones, C.R., Hamzehpour, B., and Clark, G.C., 1972, The Geology of the Masuleh sheet (Northwest Iran): Geol Survey Iran, Report. No 24, 110 P.
Elmore, R.D. and Farrand. W.R., 1981, Asphalt- bearing sediment in Synorogenic Miocene-Pliocene molasse Zagros mountains Iran: Am. Assoc. Petrol. Geol. Bull., V. 65, P. 1105-1160.
Folk, R.L. 1980, Petrology of Sedimentary Rocks, Hemphills, Austin Texas. 182 P.
Jenny, J., 1977, Geologie et stratigraphie de L'Elburze Oriental entre Aliabad et Shahrud, Iran. Universite de Geneve.
Middleton, G.V., 1973, Johann, S. Walthher Law of the correlation of facies Geol. Soc. of Amer. Bull., V.84, No.3, P.979-988.
Nabavi, M.H., and Hamdi, B., 1975, Permian Limestone with Holothurian sclerite, Semnan area, South Central Alborz, Iran, Geol. Surv. Iran, Rep. No. 32.
Reading. H. G., 1991, Sedimentary Environments and Facies, Blackwell scientific publ., 524P.
Reincks, H. E., and Singh, I.B., 1986, Depositioal Sedimentary Environments, Springer-Verlag, NewYork, 549 P.
Sieber, N., 1970, Zur Geolgie des Gebietes Sudlich des Taleghan Tales, Zentral Elburz Iran - Publications Universitaires Euroipeennes, 41-52.
Stamphli, G., M., 1978, Etude geologique generale de l'Elburz Oriental au sud de Gonbad-e-Qabus Iran.N-E. These NO. 1978.
Steiger.R., 1966, Die geologie der West- Firuzkuh area (Zentral Elburz), Iran, Mipt, Geol. Inst. Eidgen. Tech. Hochschule. Univ. Zurich, N.F.68,1, 45p.
Stocklin, J., Nabavi, M., & Samimi, M., 1965, Geology and Mineral resources of the Soltanieh mountains (North-West Iran), Geol. surv. Iran. Rep. No 2
Sussli, P., E., 1976, The Geology of the Lower Haraz valley aera Central Alborz, Iran: Geol. Surv. Of Iran, Rep., NO. 38, P. 1-36.
Tucker, M., 1991, Sedimentary petrology, Blakcwell Scientific pub 1.,P .1-107.
Visher, G., S., 1969, Grain size distributions and depositional process Jour.sed petrol., V. 39, P.1074-1106.
Walker, R., G., and Cant, D., J., 1984, Sandy fluvial systems: In R.,G. Walker, ed., Faices Modle: 2 nded., Geoscience Canada Reprint series 1, P. 71-89.
 
 
Volume 7, 25-26
Autumn & Winter 1998, vol. 7, No. 25-26
Winter 1998
Pages 72-91