The Experts below are selected from a list of 327 Experts worldwide ranked by ideXlab platform
Majid Shahpasandzadeh - One of the best experts on this subject based on the ideXlab platform.
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Active-couple indentation in Geodynamics of NNW Iran: Evidence from synchronous left- and right-lateral co-linear seismogenic faults in western Alborz and Iranian Azerbaijan domains
Tectonophysics, 2019Co-Authors: Shahryar Solaymani Azad, Majid Nemati, Mohammad-reza Abbassi, Mohammad Foroutan, Khaled Hessami, Stephane Dominguez, Mohamad-javad Bolourchi, Majid ShahpasandzadehAbstract:Situated within the central portion of the Arabia-Eurasia collision zone, NNW Iran exhibits an interesting active tectonic context characterized by synchronous left- and right-lateral co-linear seismogenic faults along the adjacent WNW-striking West-Central Alborz (e.g. the Rudbar earthquake fault) and Iranian Azerbaijan (e.g. the North Tabriz seismogenic fault). These structural domains are deforming as a single deformable geomechanical territory between the nearly rigid Central Iran and South Caspian domains to the SSW and NNE, respectively. In this paper, we analyze tectonic interactions of these active structural domains and their influence on the Geodynamics of NNW Iran based on morphotectonic and seismological investigations. Indentation tectonics is suggested to play an important role in the Geodynamics of this territory. At a plate tectonic scale, the rigid Arabian plate acts as the main indenter which bulldozes the less rigid crustal domains ahead into folded belts (within Zagros and Caucasus to the north) and pushes other blocks aside. In this deformation system, the South Caspian domain acts as a backstop against southern and western deformation zones. The structural domains of Alborz (to the east) and Iranian Azerbaijan Caucasus (to the west) are separated by the NNW-striking Astara-Talesh dextral transpressional zone. Analysis of morphotectonic features and focal mechanisms conducted in this central portion of NNW Iran confirms dextral faulting localized along the NNW-striking deformation zone, which is in agreement with the observed reverse earthquake faulting on west-dipping planes. We also discuss the contraction trajectories derived from kinematics and geometry of active folding and faulting features observed within NNW Iran. Our study highlights two prominent sets of fan-shaped trajectories dominating in the west and east sides of the N–S zone in the Astara-Zanjan direction. We propose a couple-indentation geodynamic model to explain the fan-shaped pattern of these two laterally convergent sets of trajectories within the Talesh-Azerbaijan and Alborz domains.
David Phillips - One of the best experts on this subject based on the ideXlab platform.
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The Palaeozoic tectono-metallogenic evolution of the northern Tasman Fold Belt System, Australia: Interplay of subduction rollback and accretion
Ore Geology Reviews, 2006Co-Authors: I.m.a. Vos, Frank P. Bierlein, David PhillipsAbstract:Abstract The Tasman Fold Belt System in eastern Australia provides a record of the Palaeozoic geological history and growth of the Australian continent along the proto-Pacific margin of Gondwana inboard of an extensive and long-lived subduction system. The Hodgkinson and Broken River provinces represent prominent geological elements of this system and together form the northern Tasman Fold Belt System. Geochronological age dating of the timing of gold formation in the Amanda Bel Goldfield in the Broken River Province and the Hodgkinson Goldfield in the Hodgkinson Province provides constraints on the occurrence of a deformation and mineralisation episode in the Late Devonian–Early Carboniferous. Integration of these newly-obtained data with petrogenetic constraints and a time–space evaluation of the geological evolution of the Hodgkinson and Broken River provinces, as well as other terranes in the northern Tasman Fold Belt System, allows for the development of a geodynamic model for the Palaeozoic evolution of the northern Tasman Fold Belt System. Our model indicates that three cycles of extension–contraction occurred during the Palaeozoic evolution of the northern Tasman Fold Belt System. Episodes of extension were controlled by rollback of the subduction system along the proto-Pacific margin of Gondwana, whereas episodes of contraction resulted from accretion following the arrival of positively buoyant segments (i.e., micro-continental blocks/oceanic plateaus) at the subducting trench. Our composite interpretative model on the geodynamic evolution of the northern Tasman Fold Belt System integrates the timing of the development of mineral deposits throughout this part of the system and provides a significant advancement in the understanding of Palaeozoic Geodynamics along the margin of Gondwana in northeast Australia and allows comparison with the southern part of the Tasman Fold Belt System.
I.m.a. Vos - One of the best experts on this subject based on the ideXlab platform.
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The Palaeozoic tectono-metallogenic evolution of the northern Tasman Fold Belt System, Australia: Interplay of subduction rollback and accretion
Ore Geology Reviews, 2006Co-Authors: I.m.a. Vos, Frank P. Bierlein, David PhillipsAbstract:Abstract The Tasman Fold Belt System in eastern Australia provides a record of the Palaeozoic geological history and growth of the Australian continent along the proto-Pacific margin of Gondwana inboard of an extensive and long-lived subduction system. The Hodgkinson and Broken River provinces represent prominent geological elements of this system and together form the northern Tasman Fold Belt System. Geochronological age dating of the timing of gold formation in the Amanda Bel Goldfield in the Broken River Province and the Hodgkinson Goldfield in the Hodgkinson Province provides constraints on the occurrence of a deformation and mineralisation episode in the Late Devonian–Early Carboniferous. Integration of these newly-obtained data with petrogenetic constraints and a time–space evaluation of the geological evolution of the Hodgkinson and Broken River provinces, as well as other terranes in the northern Tasman Fold Belt System, allows for the development of a geodynamic model for the Palaeozoic evolution of the northern Tasman Fold Belt System. Our model indicates that three cycles of extension–contraction occurred during the Palaeozoic evolution of the northern Tasman Fold Belt System. Episodes of extension were controlled by rollback of the subduction system along the proto-Pacific margin of Gondwana, whereas episodes of contraction resulted from accretion following the arrival of positively buoyant segments (i.e., micro-continental blocks/oceanic plateaus) at the subducting trench. Our composite interpretative model on the geodynamic evolution of the northern Tasman Fold Belt System integrates the timing of the development of mineral deposits throughout this part of the system and provides a significant advancement in the understanding of Palaeozoic Geodynamics along the margin of Gondwana in northeast Australia and allows comparison with the southern part of the Tasman Fold Belt System.
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Time-space evaluation of the tectono-metallogenic evolution of the northern Tasman Fold Belt System, northeast Queensland, Australia
ASEG Extended Abstracts, 2006Co-Authors: I.m.a. Vos, Frank P. BierleinAbstract:The Tasman Fold Belt System in eastern Australia provides a record of the Palaeozoic geological history and growth of the Australian continent along the proto-Pacific margin of Gondwana inboard of an extensive and long-lived subduction system. The Hodgkinson and Broken River provinces represent prominent geological elements of this system and together form the northern Tasman Fold Belt System. Integration of newly-obtained data with a time-space evaluation of the geological evolution of the Hodgkinson and Broken River provinces, as well as other terranes in the northern Tasman Fold Belt System, allows for the development of a geodynamic model for the Palaeozoic evolution of the northern Tasman Fold Belt System. Our model indicates that three cycles of extension ? contraction occurred during the Palaeozoic evolution of the northern Tasman Fold Belt System. Episodes of extension were controlled by roll-back of the subduction system along the Australian margin, whereas episodes of contraction resulted from accretion following the arrival of positively buoyant segments (i.e., micro-continental blocks / oceanic plateaux) at the subducting trench. Our composite interpretative model on the geodynamic evolution of the northern Tasman Fold Belt System integrates the timing of the development of mineral deposits throughout this part of the system and provides a significant advancement in the understanding of Palaeozoic Geodynamics along the margin of Gondwana in northeast Australia.
Shahryar Solaymani Azad - One of the best experts on this subject based on the ideXlab platform.
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Active-couple indentation in Geodynamics of NNW Iran: Evidence from synchronous left- and right-lateral co-linear seismogenic faults in western Alborz and Iranian Azerbaijan domains
Tectonophysics, 2019Co-Authors: Shahryar Solaymani Azad, Majid Nemati, Mohammad-reza Abbassi, Mohammad Foroutan, Khaled Hessami, Stephane Dominguez, Mohamad-javad Bolourchi, Majid ShahpasandzadehAbstract:Situated within the central portion of the Arabia-Eurasia collision zone, NNW Iran exhibits an interesting active tectonic context characterized by synchronous left- and right-lateral co-linear seismogenic faults along the adjacent WNW-striking West-Central Alborz (e.g. the Rudbar earthquake fault) and Iranian Azerbaijan (e.g. the North Tabriz seismogenic fault). These structural domains are deforming as a single deformable geomechanical territory between the nearly rigid Central Iran and South Caspian domains to the SSW and NNE, respectively. In this paper, we analyze tectonic interactions of these active structural domains and their influence on the Geodynamics of NNW Iran based on morphotectonic and seismological investigations. Indentation tectonics is suggested to play an important role in the Geodynamics of this territory. At a plate tectonic scale, the rigid Arabian plate acts as the main indenter which bulldozes the less rigid crustal domains ahead into folded belts (within Zagros and Caucasus to the north) and pushes other blocks aside. In this deformation system, the South Caspian domain acts as a backstop against southern and western deformation zones. The structural domains of Alborz (to the east) and Iranian Azerbaijan Caucasus (to the west) are separated by the NNW-striking Astara-Talesh dextral transpressional zone. Analysis of morphotectonic features and focal mechanisms conducted in this central portion of NNW Iran confirms dextral faulting localized along the NNW-striking deformation zone, which is in agreement with the observed reverse earthquake faulting on west-dipping planes. We also discuss the contraction trajectories derived from kinematics and geometry of active folding and faulting features observed within NNW Iran. Our study highlights two prominent sets of fan-shaped trajectories dominating in the west and east sides of the N–S zone in the Astara-Zanjan direction. We propose a couple-indentation geodynamic model to explain the fan-shaped pattern of these two laterally convergent sets of trajectories within the Talesh-Azerbaijan and Alborz domains.
Frank P. Bierlein - One of the best experts on this subject based on the ideXlab platform.
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The Palaeozoic tectono-metallogenic evolution of the northern Tasman Fold Belt System, Australia: Interplay of subduction rollback and accretion
Ore Geology Reviews, 2006Co-Authors: I.m.a. Vos, Frank P. Bierlein, David PhillipsAbstract:Abstract The Tasman Fold Belt System in eastern Australia provides a record of the Palaeozoic geological history and growth of the Australian continent along the proto-Pacific margin of Gondwana inboard of an extensive and long-lived subduction system. The Hodgkinson and Broken River provinces represent prominent geological elements of this system and together form the northern Tasman Fold Belt System. Geochronological age dating of the timing of gold formation in the Amanda Bel Goldfield in the Broken River Province and the Hodgkinson Goldfield in the Hodgkinson Province provides constraints on the occurrence of a deformation and mineralisation episode in the Late Devonian–Early Carboniferous. Integration of these newly-obtained data with petrogenetic constraints and a time–space evaluation of the geological evolution of the Hodgkinson and Broken River provinces, as well as other terranes in the northern Tasman Fold Belt System, allows for the development of a geodynamic model for the Palaeozoic evolution of the northern Tasman Fold Belt System. Our model indicates that three cycles of extension–contraction occurred during the Palaeozoic evolution of the northern Tasman Fold Belt System. Episodes of extension were controlled by rollback of the subduction system along the proto-Pacific margin of Gondwana, whereas episodes of contraction resulted from accretion following the arrival of positively buoyant segments (i.e., micro-continental blocks/oceanic plateaus) at the subducting trench. Our composite interpretative model on the geodynamic evolution of the northern Tasman Fold Belt System integrates the timing of the development of mineral deposits throughout this part of the system and provides a significant advancement in the understanding of Palaeozoic Geodynamics along the margin of Gondwana in northeast Australia and allows comparison with the southern part of the Tasman Fold Belt System.
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Time-space evaluation of the tectono-metallogenic evolution of the northern Tasman Fold Belt System, northeast Queensland, Australia
ASEG Extended Abstracts, 2006Co-Authors: I.m.a. Vos, Frank P. BierleinAbstract:The Tasman Fold Belt System in eastern Australia provides a record of the Palaeozoic geological history and growth of the Australian continent along the proto-Pacific margin of Gondwana inboard of an extensive and long-lived subduction system. The Hodgkinson and Broken River provinces represent prominent geological elements of this system and together form the northern Tasman Fold Belt System. Integration of newly-obtained data with a time-space evaluation of the geological evolution of the Hodgkinson and Broken River provinces, as well as other terranes in the northern Tasman Fold Belt System, allows for the development of a geodynamic model for the Palaeozoic evolution of the northern Tasman Fold Belt System. Our model indicates that three cycles of extension ? contraction occurred during the Palaeozoic evolution of the northern Tasman Fold Belt System. Episodes of extension were controlled by roll-back of the subduction system along the Australian margin, whereas episodes of contraction resulted from accretion following the arrival of positively buoyant segments (i.e., micro-continental blocks / oceanic plateaux) at the subducting trench. Our composite interpretative model on the geodynamic evolution of the northern Tasman Fold Belt System integrates the timing of the development of mineral deposits throughout this part of the system and provides a significant advancement in the understanding of Palaeozoic Geodynamics along the margin of Gondwana in northeast Australia.