A trio of laser ablation in concert with two ICP-MSs: Simultaneous, pulse-by-pulse determination of U-Pb discordant ages and a single spot Hf isotope ratio analysis in complex zircons from petrographic thin sections
文献类型：期刊论文
| 作者 | Tollstrup, Darren L.1; Xie, Lie-Wen2; Wimpenny, Josh B.1; Chin, Emily3; Lee, Cin-Ty3; Yin, Qing-Zhu1 |
| 刊名 | GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
 |
| 出版日期 | 2012-03-21 |
| 卷号 | 13 |
| ISSN号 | 1525-2027 |
| 关键词 | geochronology hafnium isotopes lead uranium zircon |
| DOI | 10.1029/2011GC004027 |
| 文献子类 | Article |
| 英文摘要 | We have developed a technique for the simultaneous in situ determination of U-Pb ages and Hf isotope ratios from a single spot in complex, discordant zircons by combining both a single-collector and a multicollector sector field inductively coupled plasma-mass spectrometry (ICP-MS) with a 193 nm excimer laser ablation system. With a suite of zircon standards of various ages, we first show that U-Pb ages can be determined accurately to within 0.3-2.5% (2 sigma) compared to the nominal value, while the internal errors are better than 0.4-0.7%; hafnium isotope ratios are accurate, relative to solution analyses, within one epsilon unit, and internal errors are typically <0.008%. We then apply the technique to complex, discordant zircons with variable Pb-206/U-238 and Pb-207/U-235 ratios, commonly discarded previously as "un-reducible data," to construct a Discordia in U-Pb Concordia plot, using every scan, every laser pulse as individual data points from a single laser ablation spot (typically > 200-250 data points). We show that the upper and lower intercept ages from the Discordia, augmented by high precision Hf isotope data obtained on the same spot, reveal invaluable information that permit unique insight to geological processes not available by other means. We demonstrate that our technique is useful for provenance studies of small, complex detrital zircons in sedimentary and high-grade metamorphic rocks, in relation to crustal growth and evolution. |
| WOS关键词 | PLASMA-MASS SPECTROMETRY ; NATURAL REFERENCE MATERIAL ; IN-SITU ANALYSIS ; MC-ICPMS ; LU-HF ; IMPROVED ACCURACY ; TRACE-ELEMENTS ; EXCIMER-LASER ; GEOCHRONOLOGY ; STANDARD |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| 出版者 | AMER GEOPHYSICAL UNION |
| WOS记录号 | WOS:000301936000003 |
| 资助机构 | NASA ; NASA ; University of California ; University of California ; NASA ; NASA ; University of California ; University of California ; NASA ; NASA ; University of California ; University of California ; NASA ; NASA ; University of California ; University of California |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/84102]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Tollstrup, Darren L. |
| 作者单位 | 1.Univ Calif Davis, Dept Geol, Davis, CA 95616 USA 2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 3.Rice Univ, Dept Earth Sci, Houston, TX 77005 USA |
| 推荐引用方式 GB/T 7714 | Tollstrup, Darren L.,Xie, Lie-Wen,Wimpenny, Josh B.,et al. A trio of laser ablation in concert with two ICP-MSs: Simultaneous, pulse-by-pulse determination of U-Pb discordant ages and a single spot Hf isotope ratio analysis in complex zircons from petrographic thin sections[J]. GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,2012,13. |
| APA | Tollstrup, Darren L.,Xie, Lie-Wen,Wimpenny, Josh B.,Chin, Emily,Lee, Cin-Ty,&Yin, Qing-Zhu.(2012).A trio of laser ablation in concert with two ICP-MSs: Simultaneous, pulse-by-pulse determination of U-Pb discordant ages and a single spot Hf isotope ratio analysis in complex zircons from petrographic thin sections.GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,13. |
| MLA | Tollstrup, Darren L.,et al."A trio of laser ablation in concert with two ICP-MSs: Simultaneous, pulse-by-pulse determination of U-Pb discordant ages and a single spot Hf isotope ratio analysis in complex zircons from petrographic thin sections".GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 13(2012). |
入库方式： OAI收割
来源：地质与地球物理研究所
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