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March 1990 - present
February 1992 - present
Publications
Publications (127)
Study of relationship between deformation and mineralization is a key for mineral exploration. In this study, we have investigated the status of tensile structures such as open joints and silica nodules, and their relationship with vein mineralization of copper and silver in Dasht-e-Bayaz fault terminal in east of Iran. The studies are focused on t...
1-ﻣﻘﺪﻣﻪ ﻓﺮوﻧ ﻣﺨﺮب از ﯾﮑﯽ ﺸﺴﺖ ﭘﺪﯾﺪه ﺗﺮﯾﻦ اﺳـﺖ زﻣـﯿﻦ ﺳﻄﺢ ﻫﺎي ﺑﻪ و ﻣﯽ ﻣﺸﺎﻫﺪه ﻗﺎﺑﻞ زﻣﯿﻦ ﺳﻄﺢ در ﻗﺎﺋﻢ ﺳﺮﻋﺖ ﺻﻮرت اﯾﻦ ﺑﺎﺷﺪ. ﺑﺮداﺷﺖ اﺛﺮ در ً ﻏﺎﻟﺒﺎ ﭘﺪﯾﺪه ﺑ ﯽ ﺳﻔﺮه از روﯾﻪ ﯾـﺎ زﯾﺮزﻣﯿﻨﯽ آب ﻫﺎي و اﻧﺤﻼل ﻓﺮﺳﺎ ﯾﺶ ﻣﯽ رخ زﯾﺮﺳﻄﺤﯽ ﻫﺎي و دﻫﺪ ﻣـ ﯽ ﺳـﺒﺐ ﺗﻮاﻧـﺪ ﺑﺮوز...
The Shotori mountain range is located along the northern terminus of the Nayband fault on the eastern and western domains of the Tabas and Lut blocks, respectively. This range with NNW-SSE trending and approximately 120 km long includes a series of thrust faults approaching the right-lateral strike-slip Nayband fault. Since the Shotori range has ex...
In this study, we have investigated the status of faults in terms of precession and subsequence, and their relationship with vein mineralization in Kaybarkuh intrusive body in East of Iran. At least, three generations of faults are evidenced in Dasht-e-Bayaz (DB) fault terminal. During formation of faults, the stress orientation in the region has c...
The Alborz mountain range in northern Iran is part of the active and seismic Alpide belt, where assessing seismic hazards is crucial due to the region’s history of large instrumental earthquakes and destructive seismic background. Moment rate estimation, which quantifies tectonic activity, offers a novel approach to understanding the energy potenti...
In this study, the active tectonics, paleoseismicity, and seismic hazards of the Doroud Fault are examined through high-resolution satellite image interpretations, field investigations, outcrop and trench excavations, and the dating of geochronology samples. The Doroud Fault (DF), one of the essential segments of the Main Recent Fault in the northe...
This study examines the evidence and effects of young tectonic activities based on the calculation of vertical changes in folds and thrusts in the western part of the Horst Shotori. Quantitative analyses of vertical changes in the western part of the Shotori and the study of factors affecting the extent of these changes have been the objectives of...
The active structures of the Iranian Makran, especially the presence of normal faults, vary laterally in the upper plate of the subduction zone, and their relationship with the deep duplexes and seamounts at depth remains unknown due to poor coverage of data onshore. In this paper, we investigate the relationship between deep structures and the top...
The Sistan orogen (Eastern Iran) separates the Afghan and Lut continental blocks and stretches along ~700 km from north to south, at a high angle with respect to other, dominantly E-W trending Alpine-Himalayan orogens. This study reappraises the tectono-metamorphic evolution of the northern part of the orogen, as well as its significance within the...
Earth fissure structures are a common type of geohazard associated with geotechnical surface ruptures that can occur almost anywhere on the ground surface due to a variety of different mechanisms, and in most cases, these hazardous cracks have resulted in severe damage to infrastructure. Investigation of the structural characteristics of fissures i...
Kaybarkuh (Mount Kaybar) consists of intrusive igneous bodies with two age periods, located in North of Dasht-e-Bayaz left-lateral fault terminal. The spatial and structural analysis of fractures and dike networks may allow for the accurate identification of mineralization zones in the area. This study aims to characterize lineament network in the...
The cross-cutting of Riedel fractures in brittle strike-slip shear zones creates fault blocks. Open spaces develop between the blocks as they rotate due to increased shear deformation. The present research focuses on extending open spaces vary from one shear zone to others depending on the dip direction of the sub-fractures and the structural style...
Purpose/Objective(s)
FLASH is a promising form of radiation therapy due to its reported ability to spare normal tissues while being equipotent in tumor control. The mechanism underlying this tissue sparing effect is currently unknown, however the depletion of tissue oxygen at FLASH dose rates has been proposed as a potential source. To date, the ox...
To investigate the intracontinental deformation during the early stage of Arabia-Eurasia collision, we studied the seismic anisotropy of the northeastern and eastern Iranian plateau via teleseismic shear-wave splitting analysis using a dense array of 65 stations. While the average delay times of ~0.75 s for most stations suggest a moderate magnitud...
Varying estimates of both present‐day strain accumulation and long‐term slip rate on the Doruneh left‐lateral strike‐slip fault, NE Iran, have led to suggestions that it exhibits large along‐strike and/or temporal changes in activity. In this study, we make and compare estimates of slip rate measured using both geodesy and geomorphology, and spanni...
Western Makran is one of the few subduction zones left with a largely unconstrained seismogenic potential. According to the sparse GPS stations, the subduction is accumulating some strain to be released during future earthquakes. To enhance the seismic hazard assessment, we here propose to study the finite deformation of the western Makran accretio...
Abstract
In the South Dezful Embayment, due to the sequence of the Zagros deformation phases and the Tectonic inversion occurrence in the Rag Sefid thrust fault, as well as the reactivation of the Hendijan fault, has been occurred a perpendicular interaction in the Zagros foreland faults that caused an important effect on the structural pattern of...
The calculation of the geometric values of the Tango anticline, including the L-parameter, the ratio of the size (R), the bluntness of fold (b(,the Fourier coefficients, and their position in the corresponding diagram, indicates that the tangu anticline is asymmetrical, and has a sinewave to chevron form. Due to the Aspect ratio of the Tangu anticl...
The Iranian plateau is a natural laboratory for deciphering the lithospheric deformation and deep dynamics in response to the Neo‐Tethyan subduction and subsequent Arabia‐Eurasia continental collision. Here we used S‐wave receiver function data from a dense seismic array to construct the structural image of the lithosphere‐asthenosphere system acro...
There were results of research on the influence of inorganic filler of tungstate on the curing process, stress-strain properties and fire resistance of oligomer-polymer composition based on epoxy resin ED-20 with PVC cured by polyamine in this paper. It's showed on the increase physical-mechanical property and fire resistant polymer compositions in...
There were results of research on the influence of inorganic filler of tungstate on the curing process, stress-strain properties and fire resistance of polymer composition based on epoxy resin ED-20 cured by polyamine in this paper. It's showed on the increase physical-mechanical property and fire resistant polymer compositions incorporated tungsta...
Key Points: • Lateral variations of the lithospheric and sub-lithospheric structures are investigated across northeastern to eastern Iran • Lithospheric responses to the Arabia-Eurasia convergence vary across the interior of the Iranian plateau • Hydrous melting possibly occurs in the asthenospheric low-velocity layer beneath eastern Iran Accepted...
Transverse fault performance in inter-basin water transfer: a case study from the central Zagros Mountains, Iran
The present study aims to investigate the diversity index (dv-index) of morphotectonic and geomorphological land-forms as one of the scientific value indices for evaluation of the geotouristic potential of the southeastern Lut desert using topographic statistical analysis. Scientific index scoring in most models is based on descriptive assessment b...
Geometry and kinematics of deformation across the Nehbandan Fault System (NFS) have been studied in the Bibimaryam and Damdameh areas in the Sistan Suture zone (SSZ). Nearly vertical fault planes with sub-horizontal lineations and correlation of these faults analysis with anisotropy of magnetic susceptibility (AMS) indicates a predominantly transpr...
In this paper, the effect of transverse faults on the orientation, density and fractures apertures and amount of mud loss is investigated in Asmari Formation as a major oil reservoir in Zagros folded belt zone, Iran. This carried out on three selected anticlines as the surface Kuh-e-Kamarab, and subsurface Marun and Aghajari oil fields. Subsurface...
As a preliminary three-dimensional numerical analysis, this research aims to detect future zones of high-stress accumulation caused by the interaction of active faults within a 3D topographic geological block based on finite-element analysis. Stress analysis of the three-dimensional topographic model covers both static and dynamic loading caused by...
Syntectonic deposits of the Mesopotamian flexural basin have been dated in the Lurestan and Fars
salients in the Zagros foldbelt since the early 2000's but not in the Dezful embayment where most
of the Zagros foreland oil is trapped. We use 237 samples collected for magnetostratigraphy to date
shallow marine to fluvial-alluvial pre-growth and growt...
In this research the Coulomb stress changes due to earthquake sequence that began in the 1936 to 1997 earthquakes in Eastern Iran and their triggering effect on the rupturing of adjacent faults were investigated. Obtained results revealed a well triggering relation between main shocks and later events on the Dasht-e-Bayaz and Abiz faults, respectiv...
The active tectonic deformation and hazardous earthquakes in
the south and west of the Lut block have been investigated for a long
time. In this study, we compute the geodetic and seismic strain rates
using focal mechanism data from the Harvard CMT catalogue and various
other sources including the published GPS velocities. Moreover, we also
perform...
Image logs of 13 wells in the Rag Sefid Anticline show two systems of fractures developed under two deformation phase in the Dezful
Embayment. This deformation phases are folding resulted from Zagros NE contraction and reactivation of the basement fault rotated
the fold axial trace within the Hendijan-Izeh fault zone. Folding phase comprises four s...
Image logs of the the Rag Sefid anticline show two present-day maximum horizontal stress orientations developed under two tectonic phases in the south Dezful embayment include folding resulted in Zagros contraction and reactivation of basement fault. In the eastern part of the anticline induced tensile fractures and borehole breakout orientations a...
Plastic behavior and significant thickness of the Gachsaran incompetence formation on top of middle carbonate units in the sedimentary sequence of the southern Dezful Embayment has led to the emergence of different styles of folding up and down of this formation and also the evolution of developed structures in the rocky units of this region. So th...
This article uses, for the first time, the absolute age for a Qanat system, to determine the slip rate of an earthquake fault. In Iran, many of Qanat galleries were dug in the vicinity of, or directly upon, active faults. In some areas such as Dasht-e Bayaz fault, line of craters are displaced by the activity of the fault, which lead to dry Qanat s...
1- Introduction
During the evolution of orogenic belts in collisional zones, rock units undergoing deformation. Deformation is the transformation from an initial to a final geometry using rigid body translation, rigid body rotation, strain (distortion), and/or volume change (Dilation) (Ramsay and Huber, 1983). Folding, faulting, and layer-parallel...
The Shekarab fault system, located in the north of the Birjand city, has fault scarps parallel to main fault. Due to the structural features, mechanism of fault trends in the region, fault-related folding and the occurrence of the migration from the north to the south at Shekarab fault, modeling is done for the geometric pattern of the fault propag...
The north-west Birjand area tectonics is mainly affected by performance of western part of the Shekarab fault Zone. The results of the morphotectonic indexes include Smf,Vf, Er, SL, suggesting high amounts for SL (707) and Er (0.58) and lower values for Vf (0.94) and Smf (1.14), with neotectonic evidences such as cutting and tilting in Quaternary s...
Today, the most common approach to treating cancer is to transport the active substances with nanocarriers, which is more advantageous than systemic administration. One of the major advantages of nanocarriers is that they can be transferred to tumors (EPR effect) through passive targeting due to their small size and with lower toxicity than systemi...
ABSTRACT
The Gutenberg–Richter parameters (a and b), fractal dimension (DC), and relationships between these parameters are calculated for different regions of the North of Central-East Iran Blocks (NCEIB). The whole examined area (between 34˚-36˚ N and 55˚-61˚ E) is divided into 55 equal square grids. Both the a and b values for the frequency-magn...
The Lut block (LB) in the eastern part of Iranian plateau bordered by large strike-slip faults which concentrated an intercontinental deformation due to convergence the Afro-Arabian and Eurasian plates. Several large earthquakes occurred in the LB. The mechanism of the earthquake sequences in the LB studied by using of the variation functions and m...
The study area is located in the northwestern Iranian plateau and exhibits ongoing convergence between the Arabian and Eurasian plates not absorbed by the Zagros orogenic belt. In this paper, we provide our geological observations made along the Maragheh and Salmas strike-slip fault zones that affect the southern portion of northwest Iran to the so...
The alluvial fans are the condensed forms of the Quaternary and the covenant period, and their examination can provide researchers with useful information about the neotectonic regional activities in which they were formed. Geomorphic indexs are useful and reliable tools for the evaluation of tectonic activities because they can easily be identifie...
Image logs of 14 wells in Rag sefid anticline are showing 6 main fracture sets treanding N45, EW, N35, N100, N150 and N162 respectively. Development of fractures in the eastern part of the Rag sefid anticline, especially in the frontal edge, are in effect of the propagation fault related folding so that the most open longitudinal and cross axial fr...
The area to the W-SW of the Lut Block in Iran has experienced numerous historical and recent destructive earthquakes. We examined a number of faults in this area that have high potential for generating destructive earthquakes. In this study a number of faults are introduced and named for the first time. These new faults are Takdar, Dehno, Suru, Hoj...
Hatamabad syncline is located in 40 km north of Qayen and its spread is 190 km2. In this study, the geometric-kinematic analysis of this syncline has been carried out to analysis of its structural relation with Dasht-e-Bayaz fault. Hatamabad syncline location in the Dasht-e-Bayaz fault segmentations Gap place and S-similar shape of these syncline,...
This study presents coupled zircon U-Pb and Hf isotopic analyses of 82 igneous rocks that are mainly from the Urumieh-Dokhtar magmatic arc (UDMA) and Sanandaj-Sirjan zone (SSZ), Iran, together with additional 11 samples from Armenia, along the central part of the Neotethyan orogenic belt. The results provide an overview of the isotopic variations f...
In this paper we tried to identify the main tectonic lineaments in Eastern Iran including Lut block and Sistan suture zone from the airborne geomagnetic data together with tilt filter. As the map of obtained lineaments from airborne geomagnetic data has been studied, four distinct set of lineaments has been identified: (i) north–south, (ii) east–we...
Shekarab thrust is located 4 km north of Birjand city. This fault has an east - west trend with 60 degree dip to north. Active shekarab Fault system is seismic source for Birjand city. Because the Shekarab fault is composed of different parts, Streams Fractal dimensions were calculated in eastern and central and western parts. Also, due to the occu...
We conducted a stress field analysis of the northern part of the ~700 km-long north-south trending, seismically active Sistan orogenic belt of Eastern Iran formed as a result of the closure of a branch of the Neo-Tethys during the early Cenozoic. Fault kinematic data reveal drastic changes in the stress regime of Eastern Iran during the late Cenozo...
Abstract
The Boushad shear zone (BSZ) is situated in the south of Birjand with at least 45 km length, about 9.2 Km width and strike N90E. The parts of the ophiolite mélange shear zone south of Birjand have changed by this shear zone. The earliest deformation, a polyphasesynmetamorphic deformation which occurred entirely in ductile conditions, D1 a...
Abstract
The Boushad shear zone (BSZ) is situated in the south of Birjand with at least 45 km length, about 9.2 Km width and strike N90E. The parts of the ophiolite mélange shear zone south of Birjand have changed by this shear zone. The earliest deformation, a polyphasesynmetamorphic deformation which occurred entirely in ductile conditions, D1 a...
Abstract
The Boushad shear zone (BSZ) is situated in the south of Birjand with at least 45 km length, about 9.2 Km width and strike N90E. The parts of the ophiolite mélange shear zone south of Birjand have changed by this shear zone. The earliest deformation, a polyphasesynmetamorphic deformation which occurred entirely in ductile conditions, D1 a...
Abstract
The Boushad shear zone (BSZ) is situated in the south of Birjand with at least 45 km length, about 9.2 Km width and strike N90E. The parts of the ophiolite mélange shear zone south of Birjand have changed by this shear zone. The earliest deformation, a polyphasesynmetamorphic deformation which occurred entirely in ductile conditions, D1 a...
Abstract
The Boushad shear zone (BSZ) is situated in the south of Birjand with at least 45 km length, about 9.2 Km width and strike N90E. The parts of the ophiolite mélange shear zone south of Birjand have changed by this shear zone. The earliest deformation, a polyphasesynmetamorphic deformation which occurred entirely in ductile conditions, D1 a...
Abstract
The Gutenberg–Richter parameters (a and b), fractal dimension (DC), and relationships between these parameters for different regions of the North of Central-East Iran Blocks (NCEIB). By using the completeness earthquake dataset for earthquakes of the instrumental period from 1976 to 2015, it is concluded that calculated values of a, b and...
The Gutenberg–Richter parameters (a and b), fractal dimension (DC), and relationships between these parameters are calculated for different regions of the North of Central-East Iran Blocks (NCEIB). The whole examined area (between 34˚-36˚ N and 55˚-61˚ E) is divided into 55 equal square grids. Both the a and b values for the frequency-magnitude dis...
Background: Restored teeth are generally weaker than sound teeth due to loss of tooth structure caused by caries and restorative procedures. The loss of both tooth structures as a result treatment will increase the likelihood of fractures during functional loading. Objective : To evaluate the fracture resistance of premolars with class II disto occ...
The Curie point depth map of Eastern Iran was constituted from spectral analysis of the aeromagnetic data. The reduction to pole (RTP) was applied to the magnetic anomaly data. The Curie point depth values from 165 overlapping blocks, 100 × 100 km in size, have been estimated. The Curie point depth method provides a relationship between the 2-D FFT...
The aim of this research is a geostatistical analysis of spatial data using earthquake data from East Azerbaijan through existing geostatistical tools. The importance of this issue is to evaluate the uncertainty of unreported earthquakes as probability maps of critical values. Therefore, we first provide the spatial pattern of continuous and catego...
The aim of this research is ideal solid meshing of a 3D geological body including topography for studies of finite element analysis. In many numerical analyses, solid meshing is abstruse and consumes much time and high CPU usage. This complexity increases with variety of shapes geometry and height heterogeneity of a surface. In geology, this issue...
This research aims to understand the response of the faults planes subjected to the certain stress fields. When an active fault ruptures, its geometry depends to the responsible mechanism at geological time. Therefore, it is important to study the faults behavior based on stress fields. We try to provide a process of modeling the fault plane. We fi...
The Shekarab Fault system is located at north of Birjand city has fault scarps parallel to main fault. For investigate the direction of migration, four cross-sections perpendicular to the fault has done. In all these sections, by moving from north to south, the older lithological units are trusted over younger ones. Units with low resistance includ...
In this study, the effect of fractures on the anticlines of the Zagros folded as one of the most important factors of wellbore instability at the reservoir wells of Asmari Formation located in the Zagros folded in Dezful Embayment has been studied. In this regard, fracture patterns were studied in three anticlines including Kuh-e. Asmari without fa...
The kinematic models and the associated orientation of compressional stress in northeastern Iran have long been the subject of debate. Previously proposed models have relied on the interpretation of overall fault geometry and geological fault slip data. These models generally suffer from low resolution of the temporal and spatial changes in the str...
Fracture intensity-controlling factors, which include folding mechanism, lithology, and thickness of layers, have been investigated in the Asmari Formation of the Kuh-e-Asmari using field studies and satellite images. Parameters such as structural position, spacing, and vertical extension of the fractures in the limestone and argillaceous limestone...
Boushad shear zone with about 45km long and 9km width that has N90E strike which is placed south of Birjand. This shear zone affects some parts of the deformed ophiolite mélange in south of Birjand. The first deformation stage occurred as a ploy phase deformation simultaneous with metamorphism in ductile condition of Eastern Iranian rift closure an...
Anisotropy of magnetic susceptibility (AMS) survey supported by field and microstructural studies have been applied on the Late Cretaceous Bibi Maryam granitoid (BMG) in the northern Sistan suture zone (SSZ), east of Iran. The BMG is composed of quartzdiorite-tonalite with late granodiorite dykes and stocks that are surrounded by steeply SW-dipping...
The main faults like Golbano, Gourband, Jahan-Abad, Rasoul-Abad and Kajab are located at a short distances from Torbat e jam city. Gourband fault is the largest fault in alluvial sediments of Torbat e jam plain that has northwest – southeast trend. Studying the geotectonical activity of the mentioned fault regarding its proximity to the city and lo...
According to the seismotectonic study, Tabriz region and its surrounding have been in an area with high seismic risk. Main and Seismic faults such as The North Tabriz Fault, Tasuj, Shabestar, South Misho, North Misho, etc… are placed at a little distance from Tabriz. Since the little distance of thses faults and some records of earthquakes along th...
The Chelounak area in northwest of Birjand located in the Sistan suture zone extremity with middle-upper Eocene sedimentary and pyroclastic rocks, folded with different axes and exposed between the Chahak-mosavieh and Mohammadieh-Hessarsangi faults. These folds have a dominant characteristic of the dispersion axis trends of NE-SW, NW-SE, and N-S. G...
The Dasht-e-Bayaz left-lateral strike-slip fault in northeastern Iran ruptured in two destructive earthquakes in 1968 and 1979. The western half of the Dasht-e-Bayaz fault cuts across the dry lake-bed in the Nimbluk valley and has no measurable relief except for at a few localised jogs in the fault trace. We provide the first quantitative constrain...
IntroductionGrouting is a common method of sealing rock and repairing concrete structures (Turkmen 2003; Butron et al. 2010; Hoien and Nilson 2013; Lim et al. 2013; Bras et al. 2013), and there are many examples of its application to the engineering of dam foundation improvement (Rafi 2010; Saeidi et al. 2013; Rostami Barani et al. 2014). Determini...
A detailed study on petrology and mineral chemistry of 32 mantle xenoliths has been conducted to decipher the physical and chemical characteristics of the lithosphere beneath NE Iran. Spinel lherzolite, the most abundant xenolith type, is made up of olivine, orthopyroxene, clinopyroxene, and spinel. Clinopyroxenes in the spinel lherzolites display...
Abstract
In this study, the development of structural elements and the relationship between these elements and dikes emplacements investigated by the field surveys and analysis of satellite images of the East Dasht-e Bayaz Fault Zone. In this area NNW-SSE (T2) and NW-SE trending dikes are which follow the fractures of the region. We measured geomet...