| 桐柏－大别造山带随县群变质变形作用研究 |
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| 引用本文： | 张泽明,韩书杰,桑隆康,刘嵘.桐柏－大别造山带随县群变质变形作用研究[J].地球科学,1996(3). |
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| 作者姓名： | 张泽明 韩书杰 桑隆康 刘嵘 |
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| 作者单位： | 地球科学学院 |
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| 基金项目： | 国家教委博士点基金,国家计委国土司项目,地矿部壳幔演化及动力学开放室验室项目 |
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| 摘 要： | 中新元古代随县群分布于秦岭—大别造山带南部，是一套形成于大陆裂谷环境中的砂页岩—流纹英安质火山碎屑岩建造，并在拉张环境中受到了辉长辉绿岩墙侵入．从新元古代末开始经历了多期变质和变形作用改造，记录了华北与扬子两大陆块及其造山作用的复杂演化历史．以现代变质地质学理论为指导，结合岩石学与构造学，宏观与微观研究，确立了随县群的地质事件序列．其主要有３个变形和变质演化阶段：晋宁期伸展滑脱固态流变，低绿片岩相变质；印支期韧性剪切，绿帘—蓝片岩相变质；早燕山期逆冲推覆，低绿片岩相变质
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| 关 键 词： | 构造解析，pTtD轨迹，随县群，桐柏—大别造山带 |
METAMORPHISM AND DEFORMATION OF SUIXIAN GROUP IN NORTHERN HUBEI PROVINCE |
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| Institution: | (Faculty of Earth Sciences,China University of Geosciences,Wuhan 430074) |
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| Abstract: | The Tongbai-Dabie mountain chain,the eastern portion of the Qinling-Dabie orogen,is a collisional orogenic belt in Central China that lies between the North China and Yangtze continental plates. The Meso-Neoproterozoic Suixian Group in the south margin of the belt is mainly composed of metamorphosed acidic volcanic rocks,sandy shales and basic dike swarm,devoloped in the active continental margin of the back-arc basin. Eight geological events can be recognized in the group,including three important stages of metamorphism and deformation:the Neoproterozoic(the Jinning stage) solid rheological,rootless intrabedding fold and the low greenschist facies metamorphism;the Late Paleozoic to Triassic(the Early Indosinian stage) ductile shear zone and epidote-blueschist facies metamorphism;the Early Jurassic(the Early Yanshan stage) thrust-nappe,tight isoclinal folds and low greenschist facies metamorphism. |
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| Keywords: | structural analysis pTtD path Suixian Group Tongbai-Dabie orogen |
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