This paper proposes a new method for 3D finite strain analysis. This method utilizes a Mohr circle construction combined with stereographic projection of the geometry of no finite longitudinal strain and with the strain ratio on the... more
This paper proposes a new method for 3D finite strain analysis. This method utilizes a Mohr circle construction combined with stereographic projection of the geometry of no finite longitudinal strain and with the strain ratio on the XZ-plane of the finite strain ellipsoid. The ...
Research Interests:
Research Interests:
Research Interests:
Finite strain and vorticity analyses were carried out in the deformed conglomerate and micro-conglomerate of Goushti shear zone in the Sanandaj-Sirjan metamorphic belt (Zagros Mountains Iran). These deformed rocks are bounded between two... more
Finite strain and vorticity analyses were carried out in the deformed conglomerate and micro-conglomerate of Goushti shear zone in the Sanandaj-Sirjan metamorphic belt (Zagros Mountains Iran). These deformed rocks are bounded between two NE and SW major thrust faults. Finite strain measurements on three principal planes of strain ellipsoid show the higher amounts of strain ratios near the major thrust faults. Strain ellipsoid shape (K-value) and strain intensity (D-value) of the Flinn diagram reveal more prolate shape of strain ellipsoid and more amount of strain intensity around the major thrust faults. According to the amounts of natural logarithmic strain (e), mylonite and protomylonite rocks have been formed in lower and higher distances from the main basal and dorsal faults respectively. Kinematic vorticity (Wm) analysis reveals an important strain partitioning in the Goushti shear zone. Results show simple shear dominant deformation near the major thrust faults and pure shear ...
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Determination of finite strain and vorticity analysis are important aims in the structural geology to characterize the strain geometry and the partitioning of pure shear and simple shear components in the deformed area. Application of... more
Determination of finite strain and vorticity analysis are important aims in the structural geology to characterize the strain geometry and the partitioning of pure shear and simple shear components in the deformed area. Application of anticlines as strain markers can use to quantifying the strain parameters. In this study we suppose the earth surface as maximum principal finite strain ellipsoid
Research Interests:
Tang-e-Hana region is located in the Snandaj-Sirjan structural zone in the Northwestern of Neyriz in the East of Fars province. The area mainly consist of ultramafic (harzburgite, dunite, wehrlite), mafic (gabbro) and marble rocks which... more
Tang-e-Hana region is located in the Snandaj-Sirjan structural zone in the Northwestern of Neyriz in the East of Fars province. The area mainly consist of ultramafic (harzburgite, dunite, wehrlite), mafic (gabbro) and marble rocks which partly changed to skarn. Contact of ultramafic rocks and Cretaceous calcite unites cause to form marble and skarn rocks in the study area. The main
Research Interests:
Microstructural, finite strain and vorticity analyses of quartz-rich mylonites were used in order to investigate kinematics of rock flow and deformation temperature in the Sirjan thrust sheet exposed in a structural window within the... more
Microstructural, finite strain and vorticity analyses of quartz-rich mylonites were used in order to investigate kinematics of rock flow and deformation temperature in the Sirjan thrust sheet exposed in a structural window within the Sanandaj–Sirjan High Pressure – Low Temperature (HP–LT) metamorphic belt that forms part of the hinterland of the Zagros orogenic belt of Iran. A dominant top-to-the-SW sense of shear in the study area is indicated by several shear sense indicators such as asymmetric boudins, rotated porphyroclasts, mica fish and S/C fabrics. Quantitative analyses reveal approximately plane strain deformation conditions with Rxz values ranging from 2.5 to 4.3 and increasing towards the Sirjan thrust. Opening angles of quartz c-axis fabrics and recrystallization regimes suggest deformation temperatures vary from 430 to 625 ± 50°C in the hanging wall rocks. Oblique grain shape and quartz c-axis fabrics were used to estimate the degree of non-coaxiality during deformation....
Research Interests:
Research Interests:
ABSTRACT This paper presents the role of tectonic and karstic processes in the formation and evolution of Barm Firuz Lake within the Zagros Mountains of Iran. This lake with elevation of 3 340 m from sea level is located in the crest of... more
ABSTRACT This paper presents the role of tectonic and karstic processes in the formation and evolution of Barm Firuz Lake within the Zagros Mountains of Iran. This lake with elevation of 3 340 m from sea level is located in the crest of the Barm Firuz anticline. Results show that the structural evolution of the Barme Firuz Lake is related to both tectonic and karst processes. Therefore the term of tectonokarstic has been used for structural evolution of the lake. Structural studies especially on the stylolite structures revealed the occurrence of an important component of simple shear deformation in the study area. Based on structural and karstic evidence around the lake, the fault-dissolution sink model with oblique pure shear component is suggested as kinematic model of the Barm Firuz Lake evolution in the Zagros Mountains of Iran.
Research Interests:
Several methods are used to determine the tectonic finite strain of deformed conglomerate and pebbles of the Dehvazir area in south western Iran. This conglomerate is part of the Sanandaj-Sirjan paired metamorphic belt. Homogeneous... more
Several methods are used to determine the tectonic finite strain of deformed conglomerate and pebbles of the Dehvazir area in south western Iran. This conglomerate is part of the Sanandaj-Sirjan paired metamorphic belt. Homogeneous coaxial and non-coaxial deformation and the strong preferred orientation of pebbles long axis are due to convergence orogenic movement. The Rf/Phi thechnique for tow dimensional strain
Research Interests:
Determination of finite strain and vorticity analysis are important aims in the structural geology to characterize the strain geometry and the partitioning of pure shear and simple shear components in the deformed area. Application of... more
Determination of finite strain and vorticity analysis are important aims in the structural geology to characterize the strain geometry and the partitioning of pure shear and simple shear components in the deformed area. Application of anticlines as strain markers can use to quantifying the strain parameters. In this study we suppose the earth surface as maximum principal finite strain ellipsoid
Research Interests:
Tang-e-Hana region is located in the Snandaj-Sirjan structural zone in the Northwestern of Neyriz in the East of Fars province. The area mainly consist of ultramafic (harzburgite, dunite, wehrlite), mafic (gabbro) and marble rocks which... more
Tang-e-Hana region is located in the Snandaj-Sirjan structural zone in the Northwestern of Neyriz in the East of Fars province. The area mainly consist of ultramafic (harzburgite, dunite, wehrlite), mafic (gabbro) and marble rocks which partly changed to skarn. Contact of ultramafic rocks and Cretaceous calcite unites cause to form marble and skarn rocks in the study area. The main
Research Interests:
Aliabad-e-Damag shear zone is exposed 35km south of Hamadan and southeast of the Alvand batholith. The shear zone is situated in the Hamadan metamorphic complex and located at the complexly deformed subzone of the Sanandaj-Sirjan zone of... more
Aliabad-e-Damag shear zone is exposed 35km south of Hamadan and southeast of the Alvand batholith. The shear zone is situated in the Hamadan metamorphic complex and located at the complexly deformed subzone of the Sanandaj-Sirjan zone of Zagros orogen. Four stages of deformation (D1, D2, D3, and D4) are identified in this area. D1 structures include First generation fold and
Research Interests:
The Neyriz ophiolite occurs along the Zagros suture zone, SW Iran, and is part of a 3000-km subduction belt that was thrusted over the edge of the Arabian continent during the Late Cretaceous. The ophiolitic suit lithologically consists... more
The Neyriz ophiolite occurs along the Zagros suture zone, SW Iran, and is part of a 3000-km subduction belt that was thrusted over the edge of the Arabian continent during the Late Cretaceous. The ophiolitic suit lithologically consists of ultramafic unit, layered and massive gabbros, sheeted dykes, and pillow lavas, surrounded by radiolarites and limestone. In the Tang e Hana
Research Interests:
The Ghareh Piri dam located 3 km northwest of Shiraz city and of longitude 52 29 38 and latitude 29 43 50.1, has been planned. It is the site on one of the six tributaries of Khoshk River running through Shiraz. The valley, on which the... more
The Ghareh Piri dam located 3 km northwest of Shiraz city and of longitude 52 29 38 and latitude 29 43 50.1, has been planned. It is the site on one of the six tributaries of Khoshk River running through Shiraz. The valley, on which the dam should be constructed, is controlled by a minor dextral fault and is located
Emad Deh watershed has extended more than 64 km2 and is located in Emad Deh village in the southeastern Fars, Iran. In this research the total load of Emad Deh River's sediment is computed by using hydraulic and sedimentary features... more
Emad Deh watershed has extended more than 64 km2 and is located in Emad Deh village in the southeastern Fars, Iran. In this research the total load of Emad Deh River's sediment is computed by using hydraulic and sedimentary features such as flow depth, river slope canal declivity, river width, flow velocity, discharge, constancy angle of sedimentary particles and definite
Research Interests:
Research Interests:
Finite strain and vorticity of flow analyses were carried out within the Deh Vazir deformed conglomerates in the Sanandaj-Sirjan metamorphic belt (Zagros Mountains, Iran). This belt is in a sequence of tectono-metamorphic complexes made... more
Finite strain and vorticity of flow analyses were carried out within the Deh Vazir deformed conglomerates in the Sanandaj-Sirjan metamorphic belt (Zagros Mountains, Iran). This belt is in a sequence of tectono-metamorphic complexes made of low-to high-grade metamorphic rocks ...
Research Interests:
ABSTRACT Fossils with a spiral shape can be used as strain markers in quantitative strain analysis. Several methods have been suggested for strain analyses that exploit the logarithmic spiral laws governing development and growth of... more
ABSTRACT Fossils with a spiral shape can be used as strain markers in quantitative strain analysis. Several methods have been suggested for strain analyses that exploit the logarithmic spiral laws governing development and growth of ammonoids. In this study, ammonoid spiral shells were measured to estimate strain variations along the northwestern limb of the Seydan anticline in the Zagros Fold-and-Thrust Belt, Iran. Results show an increase in strain from SE to NW along the Seydan anticline. These results, combined with other structural evidence, reveal a logical relationship between the intensity of folding and increasing strain. Strain variations are related to different amounts of slip along the Sivand thrust fault, which played a significant role in the development of the Seydan anticline as a fault-propagation fold.
Research Interests:
ABSTRACT Quartz c-axis fabric, finite strain, and kinematic vorticity analyses were carried out in well-exposed quartz mylonites to investigate the heterogeneous nature of ductile deformation within the Eghlid deformed area in the High... more
ABSTRACT Quartz c-axis fabric, finite strain, and kinematic vorticity analyses were carried out in well-exposed quartz mylonites to investigate the heterogeneous nature of ductile deformation within the Eghlid deformed area in the High Pressure–Low Temperature (HP–LT) Sanandaj–Sirjan metamorphic belt (Zagros Mountains, Iran). This belt belongs to a sequence of tectonometamorphic complexes with low- to high-grade metamorphic rocks affected by a polyphase deformation history. Asymmetric quartz c-axis fabrics (type I) confirm a localized top-to-the-southeast sense of shear. Quantitative finite strain analysis in the XZ, XY and YZ principal planes of the finite strain ellipsoid demonstrate that the strain ratio increases towards the thrust planes of the Zagros Thrust System. Kinematic vorticity analysis of deformed quartz grains showed sequential variation in the kinematic vorticity number from ∼0.5 to ∼0.8 between the thrust sheets. Such vorticity numbers show that both simple and pure shear components contribute to the deformation. Our results show that simple shear dominated deformation near the thrust faults, and pure shear dominated deformation far from them. Quartz c-axis opening angles suggest deformation temperatures range between 450° ± 50 °C and 600° ± 50 °C, which yield greenschist to amphibolite facies conditions during ductile deformation.
Research Interests:
Kinematic analysis of mélange fabrics provides critical information concerning tectonic processes and evaluation of the kinematics of ancient relative plate motion. Systematic kinematic analysis of deformed structures within a tectonic... more
Kinematic analysis of mélange fabrics provides critical information concerning tectonic processes and evaluation of the kinematics of ancient relative plate motion. Systematic kinematic analysis of deformed structures within a tectonic mélange exposed along the Zagros Suture Zone elucidates that this zone is an ancient transpressional boundary. The mélange is composed of a greywacke and mudstone matrix surrounding various lenses, blocks and ribbons of radiolarian chert, limestone, sandstone, pillow lava, tuff, serpentinite, shale and marl. The deformation fabrics of the mélange suggest that the mélange units were tectonically accreted at shallow levels within a subduction complex, resulting in layer-parallel extension and shearing along a NW–SE-trending suture that juxtaposes the Afro-Arabian continent to the south and the Central Iranian microcontinents to the north. The tectonic mélange is characterized by subhorizontal layer-parallel extension and subsequent heterogeneous non-coa...
Research Interests:
Research Interests:
Research Interests:
Finite strain and vorticity of flow analyses were carried out within the Deh Vazir deformed conglomerates in the Sanandaj-Sirjan metamorphic belt (Zagros Mountains, Iran). This belt is in a sequence of tectono-metamorphic complexes made... more
Finite strain and vorticity of flow analyses were carried out within the Deh Vazir deformed conglomerates in the Sanandaj-Sirjan metamorphic belt (Zagros Mountains, Iran). This belt is in a sequence of tectono-metamorphic complexes made of low-to high-grade metamorphic rocks ...
Research Interests:
This paper proposes a new method for 3D finite strain analysis. This method utilizes a Mohr circle construction combined with stereographic projection of the geometry of no finite longitudinal strain and with the strain ratio on the... more
This paper proposes a new method for 3D finite strain analysis. This method utilizes a Mohr circle construction combined with stereographic projection of the geometry of no finite longitudinal strain and with the strain ratio on the XZ-plane of the finite strain ellipsoid. The method is described using numerical examples and then it is tested by applying it to the