LA-ICP-MS锆石微区U-Pb定年方法及不同束斑直径对年龄结果的影响作用探讨
P597; 利用自然资源部古地磁与古构造重建重点实验室新引进的GeoLas HD型193nm ArF准分子激光剥蚀系统和Agilent 7900型四极杆电感耦合等离子质谱仪,成功建立了LA-ICP-MS锆石微区U-Pb定年及微量元素分析测试方法.以标准锆石91500为外标,在32μm束斑直径、5.0 J/cm2能量密度和5 Hz剥蚀频率等实验条件下,对Ple?ovice、Temora1和Qinghu锆石标样开展了U-Pb定年实验,所测年龄结果与各标样推荐值在误差范围允许的条件下一致,并且P le?ovice年龄结果在不同时间段内保持稳定.同时对未知年龄样品11-5开展了不同实验室测年结果对比研...
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| Published in | 地质力学学报 Vol. 28; no. 4; pp. 642 - 652 |
|---|---|
| Main Authors | , , , , , , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
中国地质科学院地质力学研究所,北京 100081
01.08.2022
中国地质调查局极地地学研究中心,北京 100081 自然资源部古地磁与古构造重建重点实验室,北京 100081 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1006-6616 |
| DOI | 10.12090/j.issn.1006-6616.2021140 |
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| Abstract | P597; 利用自然资源部古地磁与古构造重建重点实验室新引进的GeoLas HD型193nm ArF准分子激光剥蚀系统和Agilent 7900型四极杆电感耦合等离子质谱仪,成功建立了LA-ICP-MS锆石微区U-Pb定年及微量元素分析测试方法.以标准锆石91500为外标,在32μm束斑直径、5.0 J/cm2能量密度和5 Hz剥蚀频率等实验条件下,对Ple?ovice、Temora1和Qinghu锆石标样开展了U-Pb定年实验,所测年龄结果与各标样推荐值在误差范围允许的条件下一致,并且P le?ovice年龄结果在不同时间段内保持稳定.同时对未知年龄样品11-5开展了不同实验室测年结果对比研究,所测结果与中国地质大学(武汉)地质过程与矿产资源国家重点实验室所测年龄在误差允许范围内一致.以NIST SRM 610为外标,29Si为内标,分析测试了锆石91500和NIST SRM 612标准样品的微量元素含量,实验测试结果与推荐值一致.在此基础上探索总结了不同剥蚀斑束直径对U-Pb年龄结果的影响,认为在同样的能量密度和剥蚀频率条件下,16~44μm的剥蚀直径可以获取可靠的锆石U-Pb年龄,但32~44μm相比16~24μm小斑束直径所测得的年龄更加精准. |
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| AbstractList | P597; 利用自然资源部古地磁与古构造重建重点实验室新引进的GeoLas HD型193nm ArF准分子激光剥蚀系统和Agilent 7900型四极杆电感耦合等离子质谱仪,成功建立了LA-ICP-MS锆石微区U-Pb定年及微量元素分析测试方法.以标准锆石91500为外标,在32μm束斑直径、5.0 J/cm2能量密度和5 Hz剥蚀频率等实验条件下,对Ple?ovice、Temora1和Qinghu锆石标样开展了U-Pb定年实验,所测年龄结果与各标样推荐值在误差范围允许的条件下一致,并且P le?ovice年龄结果在不同时间段内保持稳定.同时对未知年龄样品11-5开展了不同实验室测年结果对比研究,所测结果与中国地质大学(武汉)地质过程与矿产资源国家重点实验室所测年龄在误差允许范围内一致.以NIST SRM 610为外标,29Si为内标,分析测试了锆石91500和NIST SRM 612标准样品的微量元素含量,实验测试结果与推荐值一致.在此基础上探索总结了不同剥蚀斑束直径对U-Pb年龄结果的影响,认为在同样的能量密度和剥蚀频率条件下,16~44μm的剥蚀直径可以获取可靠的锆石U-Pb年龄,但32~44μm相比16~24μm小斑束直径所测得的年龄更加精准. |
| Author | 梁霞 蔡瑜杭 张琪琪 胡国辉 张拴宏 孔令昊 王开 王森 王宏宇 |
| AuthorAffiliation | 中国地质科学院地质力学研究所,北京 100081;自然资源部古地磁与古构造重建重点实验室,北京 100081;中国地质调查局极地地学研究中心,北京 100081 |
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| Author_FL | ZHANG Qiqi WANG Sen LIANG Xia ZHANG Shuanhong CAI Yuhang WANG Hongyu KONG Linghao HU Guohui WANG Kai |
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| Keywords | LA-ICP-MS 微量元素 U-Pb定年 锆石 |
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| Title | LA-ICP-MS锆石微区U-Pb定年方法及不同束斑直径对年龄结果的影响作用探讨 |
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