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小兴安岭东部清水岩体的锆石激光探针U-Pb年龄测定 被引量:110

LA-ICPMS Zircon U-Pb Age of the Qingshui Pluton in the East Xiao Hinggan Mountains
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摘要 本文应用锆石激光剥蚀等离子质谱 (LA ICPMS)定年技术 ,测得小兴安岭东部清水岩体的侵位年龄为 2 2 2± 5Ma。岩石学和地球化学研究显示 ,该岩体为过碱性A型花岗岩 ,属于A2 型或PA型 ,形成于造山后构造环境 ,与华北板块和西伯利亚板块在二叠纪末期碰撞拼合后的岩石圈伸展作用有关。 Using laser ablation ICP-MS (LA-ICPMS) technique,the authors obtained a zircon U-Pb age of 222±5 Ma for the Qingshui pluton in the East Xiao Hinggan Mountains. Petrological and geochemical studies indicate that this pluton is peralkaline,belon-ging to A_2 or PA type of post-orogenic setting. It is concluded that the formation of this pluton resulted from the lithospheric extension after the amalgamation of the North China craton and the Siberian craton at the end of Permian.
出处 《地球学报》 EI CAS CSCD 北大核心 2004年第2期213-218,共6页 Acta Geoscientica Sinica
基金 国家自然科学基金项目 (编号 :49872 0 3 1 40 2 72 0 45 ) 中国地质调查局资助 西北大学大陆动力学教育部重点实验室专项基金资助的研究成果
关键词 锆石激光剥蚀等离子质谱定年技术 侵位年龄 清水岩体 碱性A型花岗岩 LA-ICPMS zircon U-Pb age A-type granite Qingshui pluton Northeast China
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参考文献17

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二级参考文献22

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