| 拉萨地体内松多榴辉岩的同碰撞折返:来自构造变形和40Ar-39Ar年代学的证据 |
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| 引用本文： | 李化启,许志琴,杨经绥,唐哲民,杨梅. 拉萨地体内松多榴辉岩的同碰撞折返:来自构造变形和40Ar-39Ar年代学的证据[J]. 地学前缘, 2011, 18(3): 66-78 |
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| 作者姓名： | 李化启 许志琴 杨经绥 唐哲民 杨梅 |
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| 作者单位： | 1. 中国地质科学院地质研究所,北京,100037
2. 中国科学院研究生院,北京,100049 |
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| 基金项目： | 中国地质调查局地质调查项目(1212010818035); 中国地质科学院地质研究所基本科研业务费项目(J0918); 国家自然科学基金创新研究群体项目(40921001) |
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| 摘 要： | 松多地区的区域构造变形与糜棱质白云母石英片岩和绿片岩的白云母单矿物40Ar-39Ar年代学测试表明拉萨地体内的松多地区于220～240 Ma经历过印支期碰撞造山事件.这次造山事件为晚二叠世松多榴辉岩带代表的古特提斯洋盆消失闭合之后北拉萨地体与南冈瓦那大陆碰撞的结果.该区榴辉岩与退变榴辉岩白云母和角闪石的40Ar-39A...
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| 关 键 词： | 拉萨地体 榴辉岩 同碰撞折返 构造变形 40Ar-39Ar年代学 |
Syn-collisional exhumation of Sumdo eclogite in the Lhasa Terrane,Tibet:Evidences from structural deformation and ~(40)Ar-~(39)Ar geochronology |
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| Li Huaqi,Xu Zhiqin,Yang Jingsui,Tang Zhemin,Yang Mei. Syn-collisional exhumation of Sumdo eclogite in the Lhasa Terrane,Tibet:Evidences from structural deformation and ~(40)Ar-~(39)Ar geochronology[J]. Earth Science Frontiers, 2011, 18(3): 66-78 |
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| Authors: | Li Huaqi Xu Zhiqin Yang Jingsui Tang Zhemin Yang Mei |
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| Affiliation: | Li Huaqi1,Xu Zhiqin1,Yang Jingsui1,Tang Zhemin1,Yang Mei21.Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China2.Graduate University of Chinese Academy of Sciences,Beijing 100049,China |
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| Abstract: | The structural deformation and muscovite and amphibole 40Ar-39Ar dating of muscovite quartz schist,eclogite and retrograde eclogite indicate that an Indosinian orogenesis occurred in 220-240 Ma in the Lhasa Terrane,which caused the closure of Paleo-Tethys ocean basin and the collision between the northern Lhasa Terrane and southern Gondwana.The accordance of muscovite and amphibole 40Ar-39Ar dating among eclogite,retrograde eclogite and muscovite quartz schist shows that the eclogite exhumation and Indosini... |
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| Keywords: | Lhasa Terrane eclogite syn-collisional exhumation structural deformation 40Ar-39Ar chronology |
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