SEDIMENTARY FACIES
Year:2016 | Volume:8 | Issue:2 |Papers Count:8

IntroductionThe Kopet-Dagh sedimentary basin was formed in northeast Iran, southwestern Turkmenistan and north Afghanistan after closure of the Paleotethys Ocean following the Middle Triassic orogeny (Ruttner, 1993). Tirgan Formation, in Kopeh-Dagh basin consists of thick-bedded orbitolinid limestones, limy shale– marl with thin intercalation of limestone….

IntroductionZagros foreland basin in Iran on the basis of sedimentary history is divided into five provinces including Lurestan, Fars, Zagros, Dezful embayment and Izeh Zone (Farzipour-Saeinet al.2009). In northeast Lurestan, the exposure of Mesozoic-Cenozoic stratigraphic column consists of about 4-5 km of pre-orogenic strata and about 6 km of synorogenic deposits. The Mesozoic pre-orogenic succession is mainly composed of passive margin carbonate units. The overlying synorogenic deposits include, from bottom to top, the Amiran- Kashkan detrital sequence, the Shahbazan-Asmari shallow-marine platforms, the Gachsaran evaporitic Formation, and the Agha Jari and Bakhtyari detrital formations…

IntroductionThe study area is located in Semirom sub zone (between Zagros and Sanandaj-Sirjan zones). Considering the main Zagros zonation, Navai and Mehdi Zadeh Tehrani (1986) used satellite data and tectonic studies, other than the two main structural zone of Zagros and Sanandaj-Sirjan, and introduced another subzone for Semirom. This sub zone, based on stratigraphy and folding, is different than Zagros zone. Therefore, different facies can be formed based on different movements of the independent blocks in the basement. These blocks with differential vertical movements have changed physical and chemical conditions of the sedimentary basins. In the current paper, a detailed microfacies, pale environmental analyses, depositional models and sequence stratigraphic approaches are used to understand the relationship between pale environmental parameters and change of sedimentary facies…

IntroductionThe Reeg estuary is an important coastal sedimentary environment in the north of the Persian Gulf that is located at the west of the Boushehr Province (Gharibreza, 2005). This basin shows morphology of the bar built estuary and includes three main sections of riverine, lagoon, and marine which is separated from land by the fossil beach. The Reeg estuary is an example of a retrogressive coast that is emerged by sea level fall since Late Quaternary (Gharibrezaet al., 2002; Lak et al., 2010). This estuary might be a suitable coastal environment to collect carbonate mud and calcareous oolitic sands assuming similarities between south and north of the Persian Gulf. Determining of Reeg Estuary sediment sources especially carbonate mud and oolitic sands and identification its sedimentary facies were the aims of present research…

IntroductionInvestigation on mutual relation between depositional facies and diagenesis in a sequence stratigraphic framework is essential for systematic recognition of a reservoir (Lucia, 2004; Ahr, 2008). Spatial distribution of porosities of carbonate rocks may drastically change due to diagenetic processes (Mehrabi and Rahimpour- bonab, 2013). Facies analysis and diagenetic studies in sequence stratigraphic framework could facilitate for reservoir simulation (Masse and Masse, 2011). Hence, combination between diagenesis and sequence stratigraphy is useful for better understanding of diagenetic processes (Moradet al., 2000). This research will discuss distribution and variations of diagenetic processes of the Fahliyan Formation in a sequence stratigraphic framework in the northern part of the Dezful Embayment…

IntroductionDescriptive analysis of shell beds is a useful tool within the context of the sequence stratigraphic model (Holland, 2000, 2001; Parras and Casadío, 2005; Cantalamessa et al., 2005; Di Celma et al., 2005). The formation and distribution of shell concentrations in the stratigraphic section are directly controlled by biogenic production and rate of background sedimentation (Kidwell, 1991a, b). Mid-Cretaceous shallow marine of the Albian-Cenomanian Aitamir Formation from the Kopet-Dagh basin of northeast Iran are rich in shell concentration dominated by...

IntroductionThe Lut Block is alsom called the "Median Mass of East Iran". This basin is a region characterized by Jurassic-Cretaceous-Tertiary sequence (Stocklin and Nabavi, 1973). In this research, to determine the age of these sequence in the Sarayan region (Rumeshtik section), a detailed study of calcareous nannofossils under optical microscope was performed. This section, based on the structural classification of Iran, is located in…

IntroductionIn northwest of Tabas (NE Iran), the type section of Parvadeh Formation with 46 meters in thickness was measured which its lower part consists of 7 meters of conglomerate and the upper parts include a succession of dense and rarely pisolitic dark gray limestones which has fixed key position between sandstones of Hojedk Formation and marls of Baghamshah Formation. Previous studies on Jurassic corals of Central Iran were done systematically by Flügel (1966) on Scleractinian corals of Shotori Mountains (east of Iran) within…