Fa
  • Ph.D. (1998)

    Structural Geology

    Earth Sciences, Adelaide University, Adelaide, Australia

  • M.Sc. (1990)

    Geology

    Geology, Tarbiat Modares University, Tehran, Iran

  • B.Sc. (1986)

    Geology

    Geology, Mashhad Ferdowsi University, Mashhad, Iran

  • Geometry, kinematics and dynamic analysis of fault zones in Iranian Mountain Ranges
  • Structural Geology of Zagros Fold and Thrust Belt and its reservoir potential analysis
  • Evaluation of Seismic/Aseismic (Friction and Faulting) behavior of fault rocks
  • Implication of rock deformation (Geomechanics) in Civil works (e.g. Tunnels and Roads)

    Ali Yassaghi, born in 1961, Iran, received B.Sc. and M.Sc. degrees in Geology and Structural Geology from Mashhad University and Tarbiat Modares Uinversity in 1987 and 1990, respectively. His Ph.D. degree in Structural Geology from Adelaide Uinversity, Australia in 1998. Since 1998 he has been an academic member in the Departemet of Geology at Tarbiat Modares University, teaching graduate courses in Structural Geology. Prof. Yassaghi?s research interests includes: Geometry, kinematics and dynamic analysis of fault zones in Iranian Mountain Ranges; Structural Geology of Zagros Fold and Thrust Belt and its reservoir potential analysis; Evaluation of seismic/aseismic (Friction and Faulting) behavior of fault rocks, Geological investigation of underground spaces. He has also supervising/advising M.Sc./Ph.D. theses on these research projects. Together with his students, he has published more than 100 papers in the peer-reviewed journals. He has also published a book on topic of ?Principles of Deformation in Tectonics? in Persian. Prof. Yassaghi has been among the founding board of the Iranian Society of Tectonics and a member of the Board of Directors of this society. He has also been a member of the Editorial Board of Journal of Geopersia, and Iranian Journal of Oil and Gas Science and Technolog.

    Contact

    Curriculum Vitae (CV)

    Impact of salt layers interaction on the salt flow kinematics and diapirism in the Eastern Persian Gulf, Iran: Constraints from seismic interpretation, sequential restoration?…

    Jafar Hassanpour, Josep Anton Mu?oz, Ali Yassaghi, Oriol Ferrer, Salman Jahani, Pablo Santolaria, Seyed Mohsen SeyedAli
    Journal PaperTectonophysics , 2021 April 23, {Pages 228887 }

    Abstract

    Interpretation of reflection seismic profiles, sequential restoration, and physical modelling are presented to understand the kinematics of salt flow and diapirism in the Eastern Persian Gulf, offshore Southern Iran. Salt tectonics in this area result from the overlapping Ediacaran–Early Cambrian Hormuz Salt, which is regionally present, and Oligocene–Early Miocene Fars Salt, which is locally developed. The Hormuz and Fars salts began flowing at Cambrian(?) and Early Miocene times, respectively. Diapirs fed by the Hormuz Salt rose passively during Palaeozoic and Mesozoic times and were rejuvenated by contractional deformation events in the Cenozoic. Fars-Salt structures exist either as salt walls and anticlines around those diapirs of H

    Late Cenozoic Faulting at Ziar Area in Central Alborz

    Amirhossein Sharifi, Ali Yassaghi
    Journal PaperGeopersia , 2021 May 2, {Pages }

    Abstract

    The Ziar area is located in the central part of the Alborz range. Field investigation and structural mapping of faults cut Mezozoic to Late Cenozoic (Pliocene-Quaternary) rocks in the area have led to identification of the NW- and NE- trending fault sets. Slickenlines, fault steps and riedel shear fractures are mainly applied as kinematic indicators for analysis of the faults mechanisms. The NW-trending reverse faults with left-lateral strike-slip kinematics and positive flower structure geometry (such as Golezard Fault) is the first set. This set cut through all rock formations up to Plio-Quaternary are proposed to develop during the northeastern oblique transpression deformation governs the Alborz during the final collision of the Arabian

    Impact of salt layers interaction on the salt flow kinematics and diapirism in the Eastern Persian Gulf, Iran: Constraints from seismic interpretation, sequential restoration …

    J Hassanpour, JA Muñoz, A Yassaghi, O Ferrer, S Jahani, P Santolaria, ...
    Journal Paper , , {Pages }

    Abstract

    Detecting a Sinistral Transpressional Deformation Belt in the Zagros

    MA Ghanbarian, A Yassaghi, R Derakhshani
    Journal Paper , , {Pages }

    Abstract

    Geometry, Kinematic and dynamic analysis of Bamu fault zone in north of Shiraz, Zagros Folded Belt Zone

    A Bandegani, A Yassaghi, M Eliassi
    Journal Paper , , {Pages }

    Abstract

    Effect of transverse faults on fracture characteristics and borehole instability in the Asmari reservoir of Zagros folded belt zone, Iran

    Yaghoub Jalili, Ali Yassaghi, Mohammad Mahdi Khatib, Alireza Golalzadeh
    Journal PaperJournal of Petroleum Science and Engineering , Volume 188 , 2020 May 1, {Pages 106820 }

    Abstract

    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 data on fracture characteristics were obtained from Image logs, mud losses, and reported drilling data. These are compared with outcrop fracture characteristics gathered from fieldwork and satellite image interpretation. The results show that fracture orientations are almost identical in both outcrops and subsurface data, whereas the fractures density and aperture are different along and across th

    Salt tectonics in a double salt‐source layer setting (Eastern Persian Gulf, Iran): Insights from interpretation of seismic profiles and sequential cross‐section restoration

    Jafar Hassanpour, Ali Yassaghi, Josep Anton Mu?oz, Salman Jahani
    Journal PaperBasin Research , 2020 January , {Pages }

    Abstract

    Salt tectonics in the Eastern Persian Gulf (Iran) is linked to a unique salt‐bearing system involving two overlapping ‘autochthonous’ mobile source layers, the Ediacaran–Early Cambrian Hormuz Salt and the Late Oligocene–Early Miocene Fars Salt. Interpretations of reflection seismic profiles and sequential cross‐section restorations are presented to decipher the evolution of salt structures from the two source layers and their kinematic interaction on the style of salt flow. Seismic interpretations illustrate that the Hormuz and Fars salts started flowing in the Early Palaeozoic (likely Cambrian) and Early Miocene, respectively, shortly after their deposition. Differential sedimentary loading (downbuilding) and subsalt basement

    Evaluation of transverse fault performance in inter-basin water transport using isotopic and color tracking studies, case study: Dimeh spring, Koohrang

    Ebrahim Gholami, Ali Akbar Saba, Ali Yassaghi, Mohammad Mahdi Khatib, Haji Karimi
    Journal PaperEvaluation , Volume 10 , Issue 2, 2020 August 22, {Pages 284-293 }

    Abstract

    Dimeh spring emerges from the Zarab Anticline, Zagros Mountains (Iran), and the mean annual discharge is~ 2.5 m3/s. The region has a semi-arid climate. A rainy season starts in October and usually ends in May, with snowfall common on the higher ground between December and February. The mean annual precipitation of the study area is about 1357 mm (Karimi Vardanjani et al., 2017). However, preliminary evaluations suggest that the spring recharge is from the Zarab Anticline, but in several previous dyes tracing tests, the dye was injected in the Zarab anticline was not seen in the Dimeh Spring (Janparvar, 2001; Pourab Co, 2012). Then, in order to find the catchment area of this spring, the present study has focused on tectonic aspects.

    Influence of the Gachsaran Formation lithostratigraphy on its decoupling behaivior on Zagros Frontal Fault hanging wall anticlines in the southern Dezful Embayment

    Eslam Tavakolian, Ali Yassaghi, Mehdi Najafi, Alireza Golalzadeh
    Journal PaperJournal of Advanced Applied Geology , Volume 9 , Issue 4, 2020 February 20, {Pages 407-422 }

    Abstract

    The mechanical properties of incompetent rocks play a crucial role in controlling the deformation style of fold-thrust belts. Disharmonic folding occurs due to the act of detachment layers, in which surficial fold shapes doesn’t reflect their deeper geometry. The Gachsaran Formation is the most significant detachment layers across the Zagros folded belt zone. In this study, field data, interpretation of subsurface data (2D seismic lines, UGC maps and well data) together with surface geological mapping, permit to measure crestal shift of anticlines, Aghajari, Pazanan, Rage-sefid, BibiHakimeh, Sulabdar and Nargesi in the southern Dezful Embayment. The results show the effect of the Gachsaran Formation on the folding style. Since the Gachsar

    Post Cretaceous Tectonic Evolution of Azadkuh Region in Central Alborz Mountains

    Mohammad Akbar Barati, Ali Yassaghi, Saeed Madanipour
    Journal PaperKharazmi journal of earth sciences , Volume 6 , Issue 1, 2020 August 10, {Pages 41-54 }

    Abstract

    Azadkuh region located in Central Alborz Range and comprises Paleozoic to Cenozoic rock units. The Azadkoh Fault in the north and the TF4 Fault in the south bounded the region. This study aimed to investigate structural events in the region as a part of central Alborz since Cretaceous. Investigation of structural evidence shows several geological events in Cenozoic at this part of Central Alborz range. Cretaceous volcanic overlay the Triasic-Jurasic Shemshak Formation as angular unconformity. In addition, the Paleocene Fajan conglomerate as angular unconformity overlay the Cretaceous volcanic or older rocks. The presence of Cretaceous rocks and the Karaj Formation within the Eocene basin bounding faults in which syn-sedimentary faults devel

    Pliocene growth of the Dowlatabad syncline in Frontal Fars arc: Folding propagation across the Zagros Fold Belt, Iran

    Mahdi Najafi, Elisabet Beamud, Jonas Ruh, Fr?d?ric Mouthereau, Alireza Tahmasbi, Gilen Bernaola, Ali Yassaghi, Hossein Motamedi, Shahram Sherkati, Mohammad Ghasem Hassan Goodarzi, Jaume Verg?s
    Journal PaperGSA Bulletin , 2020 January , {Pages }

    Abstract

    The integration of biostratigraphy, strontium isotope stratigraphy, and magnetostratigraphy allowed for the precise dating of the >3.0-km-thick marine to non-marine foreland sedimentary succession within the Dowlatabad growth syncline along the Frontal Fars arc in the Zagros Fold Belt that extends from eastern Turkey to southern Iran. This area was the missing link to complete the dating of syntectonic deposits in the Fars arc and quantify the migration of sedimentary belts as well as the propagation of folding across the entire Mesopotamian foreland basin. Both are essential for defining the interplay of basin evolution and sequence of folding. Deposition of the foreland marine marls in the Mishan Formation started at ca. 11.5 Ma.

    Structural and microstructural analyses of the deformation in the Faryadoun region, NE of the Zagros orogenic belt: Evidence for the occurrance of the sinistral shear

    MA Ghanbarian, A Yassaghi
    Journal Paper , , {Pages }

    Abstract

    Structural analysis and effect of fault system in Asmari-Jahrom Reservoir of Golkhari Field

    S Salman Sanaei, A Yassaghi, A Sadr, M Homaei, S Derikvand
    Journal Paper , , {Pages }

    Abstract

    The relationship between fault zone structure and frictional heterogeneity, insight from faults in the High Zagros

    A Yassaghi, C Marone
    Journal PaperTectonophysics , Volume 762 , 2019 July 5, {Pages 109-120 }

    Abstract

    Frictional heterogeneities within fault zones depend strongly on lithology as well as shear fabric and strain localization structures. Here we investigate the impact of fault rock composition and shear fabric on friction constitutive properties for mature High Zagros (Iran) fault rocks. We present field observations along with results from friction experiments on intact and powdered fault rock from carbonate, quartzofeldspathic and schist. We measured frictional strength and rate/state dependence over normal stresses from 25 to 100 MPa and shear slip velocities from 3 to 300 μm/s. The sliding friction coefficients of intact fault rocks are lower than their powdered equivalents. The foliated quartzofeldspathic and lensoidal carbonate ro

    The Role of Izeh Transverse Fault Zone in Zagros, Iran

    A Yassaghi
    Journal Paper , 2019 January , {Pages 299-301 }

    Abstract

    In this work, kinematics of the Izeh fault zone as one of the major transverse faults in Zagros and its influence as younger deformation on the belt structure are analyzed. Izeh fault zone with 165 trend in Azimuth and right-lateral strike-slip kinematics, cross-cuts the High Zagros and the Folded Belt zones of Zagros fold-thrust belt. Surface deformation of Izeh fault zone on the cover sediments includes changes on the trend of the belt major structures and development of minor folds and faults that are developed independently or overprinted on the belt major structures. Detailed structural mapping showed the presence of five major restraining step-over zones between the mapped right lateral strike-slip en-echelon faults alo

    The Effect of Fault Smearing on Spatial Development of Rock Water Reservoir in Zagros, Iran

    A Yassaghi
    Conference PaperFifth International Conference on Fault and Top Seals , 2019 September 8, {Pages }

    Abstract

    Field observations on the effect of fault smearing on spatial development of underground water and its inrush in amount of 4m3/sec into underground space.

    Geodetic Constraints of the 2017 Mw7.3 Sarpol Zahab, Iran Earthquake, and Its Implications on the Structure and Mechanics of the Northwest Zagros Thrust‐Fold Belt

    Wanpeng Feng, Sergey Samsonov, Rafael Almeida, Ali Yassaghi, Junhua Li, Qiang Qiu, Peng Li, Wenjun Zheng
    Journal PaperGeophysical Research Letters , Volume 45 , Issue 14, 2018 July 28, {Pages 6853-6861 }

    Abstract

    We reveal transient surface deformation following the 2017 Mw7.3 Sarpol Zahab (Iran) earthquake using Interferometric Synthetic Aperture Radar (InSAR) measurements. Based on the coseismic interferograms derived from the Advanced Land Observing Satellite‐2 (ALOS‐2) data, the preferred slip model of the earthquake has a centroid depth of 14.5???4?km and suggests that a basement fault is most likely responsible for the 2017 earthquake in the northwest Zagros fold‐thrust belt zone. Two slip asperities with a maximum slip of 6?m separated by 16?km are observed in the best fitting slip model. The accumulated afterslip in the first month after the mainshock determined from the Sentinel‐1 postseismic interferograms reveals a slip distribu

    Active tectonics analysis of the Kalmard fault zone, Central Iran

    M Moumeni-Taromsari, M Dehbozorgi, R Nozaem, A Yassaghi
    Journal PaperArabian Journal of Geosciences , Volume 11 , Issue 14, 2018 July 1, {Pages 369 }

    Abstract

    Central-East Iran has numerous active Quaternary faults. This paper focuses on the analysis of geomorphic and structural characteristics of the Kalmard fault zone, including major NE–SW striking fault segments that cuts across the basement and the sedimentary cover in the Ozbak-Kuh area of Central-East Iran. Because of the absence of definite earthquakes through the Kalmard fault zone in contrast to other parts of Central Iran, we used morphotectonic methods in combination of structural studies to evaluate active tectonics of this area. Detailed structural assessment of satellite images and analysis of geomorphic indices, together with field surveys allowed us to evaluate the recent tectonic activity and support a Quaternar

    Mid-Crustal thrusting and vertical deformation partitioning: 2017 Mw 7.3 Sarpol Zahab Earthquake in Zagros Mountain belt

    Jyr-Ching Hu, Ying-Hui Yang, Ali Yassaghi, Min-Chien Tsai, Mehdi Zare, Ali Rajabi, Farnaz Kamranzad
    Conference PaperEGU General Assembly Conference Abstracts , Volume 20 , 2018 April , {Pages 5831 }

    Abstract

    The Zagros fold-and-thrust belt is the product of oblique collision between Arabian and Eurasian plate which is an important orogenic belt for studying crustal deformation and seismogenic faults. Previous studies suggest that the M> 7 big earthquake occurred in the deep basement related to mid-crust thrusting with a deep d?collement fault located at 20-25 km depth resulted from a ductile shear zone. However, the moderate earthquakes (Mw 5.5-6.5) often occur in sedimentary cover with a thickness of about 10 km. The interface of basement and sedimentary cover is Hormuz Salt layer which is the major d?collement fault of the Zagros fold-and-thrust belt. The crustal deformation is decoupling between the basement and sedimentary cover, thus the c

    Tectonostratigraphy, structural geometry and kinematics of the NW Iranian Plateau margin: Insights from the Talesh Mountains, Iran

    Saeed Madanipour, Ali Yassaghi, Todd A Ehlers, Eva Enkelmann
    Journal PaperAmerican Journal of Science , Volume 318 , Issue 2, 2018 February 1, {Pages 208-245 }

    Abstract

    The structural geometry and kinematic variations along curved fold and thrust belts and their interaction with neighboring rigid basement blocks are not well understood. In this study, we present a structural mapping and stratigraphic analysis of the Talesh Mountains, Iran, to document the timing and evolution of this curved orogen due to collision with the South Caspian Block. NE and SW verging oblique slip thrust faults are the main structural features in the northern and southern parts of the mountains. The N-trending central part of the range is connected to the curved ends of the Talesh Mountains by a system of high angle reverse faults with right lateral strike-slip sense of motion. Restored cross sections indicate greater horizontal

    Current Teaching

    • MS.c.

      Advanced Structural Geology I

    • MS.c.

      Advanced Structural Geology I

    • MS.c.

      Seismotectonics

    Teaching History

    • MS.c.

      Advanced Structural Geology I

    • MS.c.

      Seismotectonics

    • 2017
      Kakaei moghaddam, Mansoreh
      geometrical Comparison of fractures obtained from interpretation of image logs with ones extracted from satellite imagery in south Dezful embayment oilfields
    • 2019
      Vazifehdar, Mina
    • 2019
      Eftekhari, Samaneh
    • 2019
      Shahmahdi, Mohammad ebrahim
    • 2014
      Tavakolian, Eslam
      The Effect of Zagros Frontal Fault System on Folding Style in the South Dezful Embayment
    • 2018
      Safari, Faeze
    • 2018
      Ghahremani, Fatemeh

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