Documentation of the Sirjan Orocline in the southeast Sanandaj-Sirjan Zone, Iran  

作　　者：Abdolreza PARTABIAN Sasan BAGHERI Fariba MORSHEDI Timothy MKUSKY 

机构地区：[1]Department of Geology,College of Sciences,University of Sistan and Baluchestan,Zahedan 98167-45845,Iran [2]Center for Global Tectonics,School of Earth Sciences,China University of Geosciences,Wuhan 430074,China

出　　处：《Journal of Mountain Science》2020年第3期528-541,共14页山地科学学报（英文）

基　　金：This work was supported by Research Council of University of Sistan and Baluchestan,Zahedan,Iran.

摘　　要：At the southeastern part of the SanandajSirjan Zone of Iran, a group of structural elements outline a large-scale arc curvature around a vertical axis. This curvature comprises several elongated structural elements and their dividing faults, axialfold traces, layering, and foliation. The most frequent lithological units include Paleozoic metamorphic rocks, Mesozoic-Paleogene sedimentary rocks, and Mesozoic magmatic-ophiolitic complex disposed in several anticlines and synclines, forming a horseshoeshaped structure with a 240-km arc length and a 90-km wavelength. We name this structure the Sirjan Orocline, and characterize this structure here through field observations and satellite image analyses. The Sirjan Orocline formed during the late EoceneOligocene related to the most significant deformation event after regional metamorphism. The final form of this structural arc is affected by a younger tectonic event that compressed and transected this structure.At the southeastern part of the SanandajSirjan Zone of Iran, a group of structural elements outline a large-scale arc curvature around a vertical axis. This curvature comprises several elongated structural elements and their dividing faults, axialfold traces, layering, and foliation. The most frequent lithological units include Paleozoic metamorphic rocks, Mesozoic-Paleogene sedimentary rocks, and Mesozoic magmatic-ophiolitic complex disposed in several anticlines and synclines, forming a horseshoeshaped structure with a 240-km arc length and a 90-km wavelength. We name this structure the Sirjan Orocline, and characterize this structure here through field observations and satellite image analyses. The Sirjan Orocline formed during the late EoceneOligocene related to the most significant deformation event after regional metamorphism. The final form of this structural arc is affected by a younger tectonic event that compressed and transected this structure.

关 键 词：OROCLINE The Sanandaj-Sirjan ZONE Curvedstructures Central-EastIranian Microcontinent 

分 类 号：P581[天文地球—岩石学] P542[天文地球—地质学]