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| 冀北赤城榴辉岩的时间序列:来自锆石SHRIMP U-Pb年龄的证据 | |
| 引用本文： | 孔旭,倪志耀,翟明国,石玉若,严刚,张静.冀北赤城榴辉岩的时间序列:来自锆石SHRIMP U-Pb年龄的证据[J].矿物岩石,2011,31(2). |
| 作者姓名： | 孔旭 倪志耀 翟明国 石玉若 严刚 张静 |
| 作者单位： | 1. 成都理工大学地球科学学院,四川成都,610059 2. 中国科学院地质与地球物理研究所,北京,100029 3. 中国地质科学院北京离子探针中心,北京,100037 |
| 基金项目： | 国家自然科学基金项目(41072050,41030316,40472041) |
| 摘 要： | 冀北赤城退变榴辉岩的原岩为兼具洋中脊和岛弧地球化学属性的拉斑玄武岩类,其变质演化经历了早期的榴辉岩相进变质,以及后期的麻粒岩相和角闪岩相退变质等阶段。锆石SHRIMP U-Pb年代学研究表明,退变榴辉岩的原岩形成于438 Ma±,峰值榴辉岩相变质发生在355 Ma±,后期麻粒岩相和角闪岩相退变质年龄则分别为341 Ma±和322 Ma~326 Ma。冀北赤城退变榴辉岩演化时间序列的确定,对探讨华北克拉通北缘中段的大地构造演化具有十分重要的意义。 |
| 关 键 词： | 锆石SHRIMPU-Pb年龄 时间序列 退变榴辉岩 赤城 冀北 |
TIME SEQUENCE OF EVOLUTION FOR THE RRETROGRADED ECLOGITE FROM CHICHENG,NORTHERN HEBEI PROVINCE:EVIDENCE FROM ZIRCON SHRIMP U-Pb DATING |
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| KONG Xu,NI Zhi-yao,ZHAI Ming-guo,SHI Yu-ruo,YAN Gang,ZHANG Jing.TIME SEQUENCE OF EVOLUTION FOR THE RRETROGRADED ECLOGITE FROM CHICHENG,NORTHERN HEBEI PROVINCE:EVIDENCE FROM ZIRCON SHRIMP U-Pb DATING[J].Journal of Mineralogy and Petrology,2011,31(2). | |
| Authors: | KONG Xu NI Zhi-yao ZHAI Ming-guo SHI Yu-ruo YAN Gang ZHANG Jing |
| Institution: | KONG Xu1,NI Zhi-yao1,ZHAI Ming-guo2,SHI Yu-ruo3 YAN Gang1,ZHANG Jing1 1.College of Earth Sciences,Chengdu University of Technology,Chengdu 610059,China,2.Institute of Geology and Geophysics,Chinese Academy of Science,Beijing 100029,3.Laboratory of Ion Microprobe,Chinese Academy of Geological Sciences,Beijing 100037 |
| Abstract: | The protolith of retrograded eclogite samples occurred in Chicheng,northern Hebei Province is of tholeiitic oceanic crust with geochemical characteristics of mid-ocean ridge(MORB) or island arc(IAT) environment.Three main metamorphic evolutional stages are recognized and characterized by the early peak eclogite facies stage,the later granulite facies retrogressive metamorphism stage and amphibolite facies retrogressive metamorphism stage.Zircon SHRIMP isotopic dating of two different textural varieties of r... |
| Keywords: | Zircon SHRIMP U-Pb isotopic age time sequence retrograded eclogite Chicheng northern Hebei Province |
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