| 3.8 Ma:青藏高原年轻碱性玄武岩锆石离子探针U-Pb年龄测定 |
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| 引用本文： | 万渝生,罗照华,李莉.3.8 Ma:青藏高原年轻碱性玄武岩锆石离子探针U-Pb年龄测定[J].地球化学,2004,33(5):442-446. |
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| 作者姓名： | 万渝生 罗照华 李莉 |
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| 作者单位： | 中国地质科学院,地质研究所,北京,100037;北京离子探针中心,北京,100037;中国地质大学,北京,100083 |
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| 基金项目： | 国家自然科学基金，国家重点基础研究发展计划(973计划) |
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| 摘 要： | 离子探针(SHRIMP)是一种主要用于锆石U-Pb年龄测定的仪器,已获得了大量有意义的年龄数据,但十分年轻地质体锆石年龄测定方面的报道还不多见.报道了北京离子探针中心应用SHRIMP技术测定青藏高原晚第三纪3.8 Ma碱性玄武岩的年龄结果,同时讨论了获得十分年轻地质体高精度锆石U-Pb年龄的条件.
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| 关 键 词： | 离子探针 玄武岩 锆石 U-Pb定年 晚第三纪 青藏高原 |
| 文章编号： | 0379-1726(2004)05-0442-05 |
| 修稿时间： | 2003年11月19 |
3.8 Ma:SHRIMP U-Pb zircon dating of the younger alkali basalt in the Qinghai-Xizang Plateau |
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| WAN Yusheng,LUO Zhaohua,LI Li.3.8 Ma:SHRIMP U-Pb zircon dating of the younger alkali basalt in the Qinghai-Xizang Plateau[J].Geochimica,2004,33(5):442-446. |
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| Authors: | WAN Yusheng LUO Zhaohua LI Li |
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| Institution: | WAN Yusheng1,2,LUO Zhaohua3,LI Li31. Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China, 2. Beijing SHRIMP Lab,Beijing 100037,China,3. China University of Geosciences,Beijing 100083,China |
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| Abstract: | SHRIMP (sensitive high resolution ion microprobe) plays an important role in UPb zircon dating. However, this method is not applied widely in dating very young geological bodies. In this paper, it is reported a 3.8 Ma of age for a Neogene alkali basalt in the QinghaiXizang Plateau using SHRIMP II in Beijing SHRIMP Lab, which is the youngest zircon age obtained in China until now. How to obtain highprecision UPb zircon ages of very young geological bodies is also discussed. |
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| Keywords: | SHRIMP basalt zircon UPb dating Neogene QinghaiXizang Plateau |
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