| 云南中甸地区雪鸡坪同碰撞石英闪长玢岩锆石SHRIMP U-Pb定年及其意义 |
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| 引用本文： | 林清茶,夏斌,张玉泉.云南中甸地区雪鸡坪同碰撞石英闪长玢岩锆石SHRIMP U-Pb定年及其意义[J].地质通报,2006(Z1). |
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| 作者姓名： | 林清茶 夏斌 张玉泉 |
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| 作者单位： | 中国科学院边缘海地质重点实验室中国科学院广州地球化学研究所，中国科学院边缘海地质重点实验室中国科学院广州地球化学研究所，中国科学院边缘海地质重点实验室中国科学院广州地球化学研究所 广东广州510640中国科学院研究生院，北京100039，广东广州510640，广东广州510640 |
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| 基金项目： | 中国科学院知识创新工程重要方向项目(编号KZCX2-SW-117)，国家自然科学基金项目(4007202)资助。 |
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| 摘 要： | 对金沙江缝合带东侧雪鸡坪同碰撞石英闪长玢岩进行了岩石学、岩石化学、稀土元素、锆石SHRIMPU-Pb定年等研究,石英闪长玢岩锆石SHRIMPU-Pb年龄为215Ma。结合前人的资料,认为金沙江洋盆闭合、板块碰撞的时间应为266Ma,碰撞阶段的年龄范围为266～215Ma。对无老核的岩浆型锆石的形成条件、结构简单的典型纯岩浆型锆石定年的测试点数量等方面也进行了讨论。
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| 关 键 词： | SHRIMPU-Pb年龄 锆石 石英闪长玢岩 同碰撞 云南中甸 |
Zircon SHRIMP U-Pb dating of the syn-collisional Xuejiping quartz diorite porphyrite in Zhongdian, Yunnan, China, and its geological implications. |
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| LIN Qing-cha,XIA Bin,ZHANG Yu-quan. Key Laboratory of Marginal Sea Geology,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou ,Guangdong,China,. Graduate School,Chinese Academy of Sciences,Beijing ,China.Zircon SHRIMP U-Pb dating of the syn-collisional Xuejiping quartz diorite porphyrite in Zhongdian, Yunnan, China, and its geological implications.[J].Geologcal Bulletin OF China,2006(Z1). |
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| Authors: | LIN Qing-cha XIA Bin ZHANG Yu-quan Key Laboratory of Marginal Sea Geology Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou Guangdong China Graduate School Chinese Academy of Sciences Beijing China |
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| Institution: | LIN Qing-cha1,2,XIA Bin1,ZHANG Yu-quan11. Key Laboratory of Marginal Sea Geology,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,Guangdong,China,2. Graduate School,Chinese Academy of Sciences,Beijing 100039,China |
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| Abstract: | This paper deals with the petrological, petrochemical and REE studies of the Xuejiping syn-collisional quartz diorite porphyrite on the eastern side of the Jinshajiang suture zone. Its zircon SHRIMP U-Pb dating gives an age of 215 Ma. Based on this age, combined with previous data, the authors believe that the Jinshajiang ocean basin closed at 266 Ma and that the collision stage took place at 266-214 Ma. The conditions for the formation of magmatic zircon (zircon without an older core) and the number of analyzed spots for the dating of typical, pure magmatic type zircon with a simple structure are also discussed. |
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| Keywords: | SHRIMP U-Pb age zircon quartz diorite porphyrite syn-collision Zhongdian Yunnan |
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