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2篇 您的检索式:作者名="S.C.LAURENT"
    题名 作者 年代 出处 被引量
1Paleozoic Accretion-Collision Events and Kinematics of Ductile Deformation in the Eastern Part of the Southern-Central Tianshan Belt, China显示文摘The Tianshan range could have been built by both late Early Paleozoic accretion and Late Paleozoic collision events. The late Early Paleozoic Aqqikkudug-Weiya suture is marked by Ordovician ophiolitic mélange and a Silurian flysch sequence, high-pressure metamorphic relics, and mylonitized rocks. The Central Tianshan belt could principally be an Ordovician volcanic arc; whereas the South Tianshan belt, a back-arc basin. Macro- and microstructures, along with unconformities, provide some kinematic and chronological constraints on 2-phase ductile deformation. The earlier ductile deformation occurring at ca. 400 Ma was marked by north-verging ductile shearing, yielding granulite-bearing ophiolitic mélange blocks and garnet-pyroxene-facies ductile deformation, and the later deformation, a dextral strike-slip tectonic process, occurred during the Late Carboniferous(Early Permian. Early Carboniferous molasses were deposited unconformably on pre-Carboniferous metamorphic and ductilely sheared rocks, implying the end of the early orogeny. The large-scale ductile strike-slip along the Aqqikkudug-Weiya zone was possibly caused by the second tectonic event, the Hercynian collision between the northern Tarim block and the southern Siberian block. Late Paleozoic granitic magmatism and superimposed structures overprinted this Early Paleozoic deformation belt. Results of geometric and kinematic studies suggest that the primary framework of the Southern-Central Tianshan belt, at least the eastern part of the Tianshan belt, was built by these two phases of accretion events.舒良树 J.Charvet 卢华复 S.C.LAURENT 2002Acta Geologica Sinica(English Edition)2002,76,3:36
2中国中南天山造山带东段古生代增生-碰撞事件和韧性变形运动学显示文摘天山山脉是通过早古生代晚期的增生和晚古生代的碰撞事件形成的。早古生代晚期的阿齐克库都格——尾亚缝合带以奥陶纪的蛇绿混杂岩、含奥陶纪——志留纪化石的复理石以及高压变质岩和糜棱岩为特征。中天山造山带主要是一个奥陶纪的钙碱性火山岩——深成岩岛弧,而南天山主体是一个弧后盆地。舒良树 J.Charvet 卢华复 S.C.Laurent 2002地质学报2002,76,3:3
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