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Comparisons of the suture zones along a geotraverse from the Scythian Platform to the Arabian Platform

Geoscience Frontiers 2014年第6期5卷 855-875页

作者： Ali Yilmaz Shota Adamia Hüseyin Yilmaz Cumhuriyet University Engineering FacultyDepartment of Environmental EngineeringKayseri StreetCU.CampusTR-58140 SivasTurkey Nodia Institute of Geophysics 1M.Alexidze Str.0195TbilisiGeorgia Cumhuriyet University Engineering FacultyDepartment of Geophysical EngineeringTR-58140 SivasTurkey

The area from the Greater Caucasus to the southeast Turkey is characteri：;.ed and shaped by several major continental blocks. These are Scythian Platform, Pontian-Transcaucasu.,; Continent-Arc System （PTCAS）, the Anatolian-lranian and the Arabian Platforms. The aim of this paper is to define these continental blocks and describe and also compare their boundary relationships along the suture zones. The Scythian Platform displays the evidence of the Hercynian and Alpine orogens. This platform is separated from the PTCAS by the Greater Caucasus suture Zone. The incipient collision began along this suture zone before middle-late Carboniferous whereas the final collision occurred before Oligocene. The PTCAS can be divided into four structural units：（1） the Georgian Block - northern part of the Pontian-Transcaucasian island-arc, （2） the southern and eastern Black Sea Coast-Adjara-Trialeti Unit, （3） the Artvin-Bolnisi Unit, comprising the northern part of the southern Transcaucasus, and （4） the Imbricated Bayburt-Garabagh Unit. The PTCAS could be separated from the Anatolian Iranian Platform by the North Anatolian-Lesser Caucasus suture （NALCS） zone. The initial collision was developed in this suture zone during Senonian-early Eocene and final collision before middle Eocene or Oligocene-Miocene. The Anatolian-lranian Platform （AIP） is made up of the Tauride Platform and its metamorphic equivalents together with Iranian Platform. It could be separated from the Arabian Platform by the Southeastern Anatolian suture （SEAS） zone. The collision ended before late Miocene along this suture zone. The southernmost continental block of the geotraverse is the Arabian Platform, which constitutes the northern part of the Arabian-African Plate. This platform includes a sequence from the Precambrian felsic volcanic and clastic rocks to the Campanian-early Maastrichtian fiyschoidal clastics. All the suture zones include MORB and SSZ-types ophiolites in different ages. However, the ages of

关键词： Scythian Plattorm Arabian Platform suture zones Ceotraverse

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Permian-Triassic amalgamation of Asia:Insights from Northeast China sutures and their place in the final collision of North China and Siberia

Permian-Triassic amalgamation of Asia:Insights from Northeas...

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中国科学院地质与地球物理研究所2008学术年会

作者： Michel Faure Sebastien Nomade Paul Randall Renne UMR 6113 institut des sciences de la Terre d'Orleansuniversite d'Orleans45067 Orleans cedex 2France Berkeley Geochronology Center 2455 Ridge RoadBerkeleyCA 94709USA Department of Earth and Planetary Science University of CaliforniaBerkeleyCA 94720USA Laboratoire des sciences du climat et de l'environnement CEA-CNRS-UVSQIPSLavenue de la Terrasse91190 Gif-sur-Yvette cedexFrance

The Central Asia Orogenic Belt(CAOB) corresponds to the domain where Siberia and Mongolia were welded to North China. The eastern extension of the CAOB in Northeast China is disputed,since both suture location and timing are poorly documented. This paper reports for the first time the recognition of two suture zones in the southern part of Northeast China(Manchuria),between the Fushun Mishan and Yilan-Yitong *** the Jilin Province,west-directed thrust sheets involving successively,from west to east,passive continental margin rocks,metamorphic rocks and ophiolites,block-in-matrix formations and arc plutons indicate a Permian-Early Triassic *** the Liaoning Province,arc plutonism and top-to-the-north ductile shearing,coeval with the emplacement of an ophiolitic nappe,suggest a Palaeozoic *** two sutures are correlated with the Ondor Sum and Solonker sutures,described in Inner Mongolia.A new geodynamic model involving rifting and collision of the southern part of the Xilinhot Block with North China is proposed.

关键词： NE China suture zones Continental collision Central Asia Orogenic Belt Indosinian tectonics

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