| 西藏中冈底斯带措勤地区则弄群熔结凝灰岩锆石LA—ICP—MS U—Pb年龄 |
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| 引用本文： | 刘伟,李奋其,袁四化,卓皆文,张万平,梁婷.西藏中冈底斯带措勤地区则弄群熔结凝灰岩锆石LA—ICP—MS U—Pb年龄[J].中国区域地质,2010(7):1009-1016. |
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| 作者姓名： | 刘伟 李奋其 袁四化 卓皆文 张万平 梁婷 |
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| 作者单位： | [1]中国地质调查局成都地质调查中心,四川成都610081 [2]中国地质科学院研究生部,北京100037 [3]中国地质大学（北京）地球科学与资源学院,北京100083 [4]中国地质大学（武汉）／地质过程与矿产资源国家重点实验室,湖北武汉430074 |
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| 基金项目： | 中国地质调查局国土资源大调查项目青藏专项《雅鲁藏布江成矿带基础地质综合研究》（编号：1212010818016）资助 |
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| 摘 要： | 对措勤地区则弄群熔结凝灰岩进行了LA—ICP—MS锆石U—Pb定年．所测的2件熔结凝灰岩样品的LA-ICP—MS锆石U—Pb年龄分别为112．7Ma±1．0Ma和108．6Ma±1．6Ma。根据已有的年代学数据、地球化学资料和最新的1：25万区域地质调查成果，认为中冈底斯北部的则弄群火山岩很可能与班公湖一怒江特提斯洋向南的俯冲作用有关。
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| 关 键 词： | 锆石LA—ICP—MS U—Pb年龄 中冈底斯带 熔结凝灰岩 措勤地区 |
Zircon LA-ICP-MS U-Pb age of ignimbrite from Zenong Group in Coqen area of the central Gangdese belt, Tibet, China |
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| LIU Wei,LI Fen-qi,YUAN Si-hua,ZHUO Jie-wen,ZHANG Wan-ping,LIANG Ting.Zircon LA-ICP-MS U-Pb age of ignimbrite from Zenong Group in Coqen area of the central Gangdese belt, Tibet, China[J].Regional Geology of China,2010(7):1009-1016. |
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| Authors: | LIU Wei LI Fen-qi YUAN Si-hua ZHUO Jie-wen ZHANG Wan-ping LIANG Ting |
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| Institution: | 1. Chengdu Center, China Geological Survey , Chengdu 610081, Sichuan, China; 2. Graduate School of Chinese Academy of Geological Sciences, Beijing 100037, China; 3. School of the Earth Sciences and Resources ,China University of Geosciences, Beijing 100083, China; 4. The State Key Laboratory of Geological Processes and Mineral Resources/China University of Geosciences Wuhan 430074, Hubei, China) |
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| Abstract: | To ascertain the genesis and regional correlation, the authors measured the LA-ICP-MS zircon U-Pb ages of ignimbfite from Zenong Group widely developed in the Coqen area. LA-ICP-MS zircon U-Pb ages of two ignimbrite samples are respectively 112.7±1.0Ma and 108.6±1.6Ma. According to the chronological data, geochemical data and latest 1：250000 regional geological survey results obtained, the authors beheved the Zenong Group volcanic rocks in the northern central Gangdese were most likely associated with southward subduction of Bangong Co-Nujiang Tethys oceanic crest. |
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| Keywords: | zircon LA-ICP-MS U-Pb age central Gangdese belt ignimbrite Coqen area |
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