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Search Results: 1 - 10 of 623 matches for " Mehran Arian "
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Physiographic-Tectonic Zoning of Iran’s Sedimentary Basins  [PDF]
Mehran Arian
Open Journal of Geology (OJG) , 2013, DOI: 10.4236/ojg.2013.33020
Abstract:

Base on geological history evaluation using regional stratigraphy, sedimentary environments, magmatic activities, metamorphism and structural trend in Iran, physiographic-tectonic zoning map of Iran’s sedimentary basins has prepared. This map has prepared to point out the basement tectonics role in Iran. It contains twenty-four different provinces. Iran has composed from different plates: Arabian plate in south and west, Cimmerian manipulated in north and east, Eurasian plate in northeast margin. Cimmerian manipulated at least can be divided to the smaller part, East-Central Iran and North-Central Iran microcontinents. There are evidences for thick-skinned tectonics in the border zones of these plates and microcontinents, especially in Sanandaj-Sirjan overthrust belts that it formed by crustal stacking wedges. Also, Neoproterozoic-Phanerozoic Tectonic column in the Arabian, Cimmerian and Eurasian plates under Iran Country area have introduced.

The Biggest Salt-Tongue Canopy of Central Iran  [PDF]
Mehran Arian, Hamideh Noroozpour
Open Journal of Geology (OJG) , 2015, DOI: 10.4236/ojg.2015.52005
Abstract: One of the most interesting salt structures is salt-tongue canopy. The Central Iran basin has a few salt provinces and in this paper, morphotectonic concept of the salt-tongue canopy on the west of Garmsar city has been investigated. In this study, field data coupling with the salt tectonic-related factors to provide a position for salt rocks in the west Garmsar. Firstly, various geological factors such as faults, folds and roads were extracted and compiled. This is because the factors mentioned above play important role in the instability of the region. The results of this study showed that the salt extrusion from the Lower Red formation is severe. Further, it is evident that the shortening of main structures has had a great impact on it whilst the salt movements have occurred within Garmsar Syncline. Finally, the paper concluded that the salt-tongue canopy in the region has increased the rates of salt extrusion.
Lineament Tectonics and Mineralizatin in Tarom Area, North Iran  [PDF]
Mehran Arian, Reza Nouri
Open Journal of Geology (OJG) , 2015, DOI: 10.4236/ojg.2015.53011
Abstract: The study area that is part of Tarom volcano-plutonic zone which host many hydrothermal base metal deposits located in Zanjan, NW Iran. Understanding the tectonic events that can cause mineralization and hydrothermal alteration are significant factor in assessing the exploration potential of different structures. In this research, hydrothermal alteration such as Iron oxide, argillic, phyllic, and propylitic zones were determined by Spectral Angle Method (SAM) and also lineaments identified by high pass filters and hill-shade DEM techniques on Advanced Space borne Thermal Emission and Reflection Radiometer (ASTER) data. Field studies revealed most alteration and mineralization occurred in NE-SW fractures and control mineralization.
Tectonic Geomorphology of Iran’s Salt Structures  [PDF]
Mehran Arian, Hamideh Noroozpour
Open Journal of Geology (OJG) , 2015, DOI: 10.4236/ojg.2015.52006
Abstract: Iran has a various salt structures that their tectonic geomorphology is subject of this paper. Geologic situation of salt structures in Iran have determinate. According to age and geological setting of salt deposits that revealed by tectonic geomorphology methods, salt structure provinces of the Central and Southern Iran have been distinguished. Also, critical concepts of salt diapirism in the Southern Iran and Central Iran salt basins have explained. Therefore, Central Iran’s salt diapirs have triggered by tectonic forces, but salt diapirism in the Southern Iran has triggered by halokinesis, then it has effected by tectonic forces, especially in Zagros fold and thrust belt.
Sedimentary Environments Can Be Changed by Geotechnology (Case Study: A Morphotectonic Idea for Design of Extensive Artificial Bay on the Iranian Plateau)  [PDF]
Mehran Arian, Azar Khodabakhshnezhad
International Journal of Geosciences (IJG) , 2015, DOI: 10.4236/ijg.2015.65039
Abstract: Iranian Plateau between the Lesser Caucasus-Alborz Mountains on the north and Zagros-Makran Ranges on the south has several inter-mountainous depressions which were filled by Quaternary deposits. Geologic evidence implied that, the last marine conditions in some depressions such as the Dasht-e Kavir, Dasht-e Lut and Jazmourian basins, had been changed to land conditions in middle Miocene. Based on shape and elevation of the Dasht-e Kavir, Dasht-e Lut and Jazmourian plains related to sea level and geomorphology of Iranian plateau, three semi-connective artificial lakes can be constructed upon the mentioned plains by consideration of many geologic and geotechnical parameters. These artificial lakes can feed by pumping of water from Oman Sea and form a triple artificial bay which they must be connected together by two gated straits. Therefore, a possible morphotectonic idea with many advantages has suggested that it can be present as an international geotechnologic design. This design has the important environmental impacts which can be changed desert to lake sedimentary basins.
Seismic Activity and Fractal Geometry of Kareh Bas Fault System in Zagros, South of Iran  [PDF]
Mehran Arian, Hamideh Noroozpour
Open Journal of Geology (OJG) , 2015, DOI: 10.4236/ojg.2015.55026
Abstract: Kareh Bas is one the transverse fault systems in Zagros fold-thrust belt. Kareh Bas Transcurrent Fault System with a total length of 200 Km is situated about 80 Km east of the Borazjan segment (a part of Kazerun fault zone) and 40 Km west of Shiraz. It is a nearly N-S trending right-lateral linked strike-slip fault system, and several anticlinal axes have been displaced by it. Strike separation (109 Km) of Mountain Front Fault/Flexure (MFF) of Zagros is the most important function of Kareh Bas Transcurrent Fault System. According to fractal analysis (Box-counting method) on space image maps (1:50,000) prepared from Spot data, fault related surface ruptures have non-linear patterns and fault segments have nearly plane form fractal dimensions; specially at north and south terminations. It means that, the north and south terminations of Kareh Bas Transcurrent Fault System are active (earthquake fault segments) and latter case is more active, because it is coinciding on Zagros mountain front faults (MFF).
Mud Diapirism on the Gorgan, North Iran  [PDF]
Mehran Arian, Ali Sistanipour
Open Journal of Geology (OJG) , 2015, DOI: 10.4236/ojg.2015.56041
Abstract: The several mud volcanoes have been exposed at the Gorgan area in the north Iran. The Garniarig-Tapeh is the biggest mud volcano and the investigation of its tectonic geomorphology is the main aim in this paper. Also, we have determinated tectonic and geologic setting of Naft-Lije mud volcanoes and several Salses as the exposed mud diapirs at Gorgan on the northern margin of Iran. These mud volcanoes have been formed during quaternary of as a shield shape hill or pool on the flat plain in coastal region SE Caspian Sea. There are flat area and several mud volcanoes that they have been triggered by buoyant driving mechanisms, have been appeared during dormant periods of mud volcanoes activity. This mechanism has been developed in neotectonic regime by convergent setting between The Cimmerian and Eurasian plates. Finally, the main characteristics of the Gorgan area have presented.
Geometric Analysis of Davaran Fault System, Central Iran  [PDF]
Ali Sistanipour, Mehran Arian
Open Journal of Geology (OJG) , 2015, DOI: 10.4236/ojg.2015.56043
Abstract: One of the main faults of the Central Iran is Davaran Fault system which holds right-lateral strike slip with a pressure component. Contemporary activities of this fault signify the continuity of stresses up to now. Davaran fault system has extended parallel to Davaran Mountains. Most of the drainage networks of this region are located on trend of faults. The faults of this region are classified to 5 groups. These groups include conjugated faults of Riedel and Anti-Riedel (R, R'), normal faults (T), faults parallel with the major fault (Y) and faults approximately parallel with the main fault (P). T Faults are normal faults with tension mechanism. By calculation of sinuosity (Smf) of northeast and southwest mountain fronts of the region and ratio of valley floor width of the rivers flowing in the region to their wall height (Vf), it is specified that this region is active in terms of uplift and tectonics. The rivers have deep valley. Tectonic activity in northeast front is more active than southwest mountain front.
Rule of Structural Factors in Formation of Porphyry Copper Deposits in South Western Part of Kerman Area, Iran  [PDF]
Hasan Alizadeh, Mehran Arian
Open Journal of Geology (OJG) , 2015, DOI: 10.4236/ojg.2015.57045
Abstract: Kerman area is located in southern parts of central Iranian volcanic belt. The area under study is located in the southern part of this complex copper mineralization in the area, which is mainly porphyry type and is associated with extensive hydrothermal alteration. This area has a great potential as far as tertiary porphyry copper deposits are concerned. To the exploration of porphyry copper deposits in study area, we have analyzed the lineaments. The lineaments interpreted out from ETM + (band8) data is recognized as another method for locating porphyry type copper mineralization. There is a close correlation between photo lineament factor values and the known copper mineralization in the area. The relationship between 16 porphyry copper deposits with faults and fractures in the area is studied. Photo lineament factor assessments by using satellite photos indicate a strong relationship between a number of lineation intersection in each cell refer to an amount of average lineation in whole map (c/C ratio). In the study area, ratio of c/C even has more relationship refers to PF factor that has previously described in the papers.
Neotectonics of Kashaf Rud River, NE Iran by Modified Index of Active Tectonics (MIAT)  [PDF]
ElaheJavadi Mosavi, Mehran Arian
International Journal of Geosciences (IJG) , 2015, DOI: 10.4236/ijg.2015.67063
Abstract: Kashaf rud river is located in border zone of East Alborz and Kopet Dagh physiographic provinces in the north east Iran. Geomorphic indices are useful tools to show the neotectonic regimes. These indices have got the advantage of being calculated from Arc GIS and remote sensing packages over large area as a useful tool to identify geomorphic anomalies possibly related to active tectonics. In this research, seven geomorphic indices (stream-gradient index, valley floor width-valley height ratio, mountain-front sinuosity, drainage basin asymmetry, hypsometric integral, drainage basin shape and transverse topographic symmetry factor) were calculated along the Kashaf rud river. Then, based on a new index or modified index of active tectonics (Miat) values that calculated by average of seven geomorphic indices, relative tectonic activities levels were revealed. The low class of Miat is mainly in the sub-basins of No. 6, 10, 13, 14, 21, 22, 23, 24 & 28 while the rest of the study area has moderate tectonic activities in the other sub-basins. Our results show that the moderate value has located along faulted area, which shows 2 class of relative tectonic activity. These faults have been formed above an old suture zone between Cimmerian and Eurasian plates.
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