Precise ID-TIMS U-Pb dating of single zircons using Pb-265-U-233-U-236 tracers : Isobaric oxide corrections for UO2+ with in-run measured O-18/O-16
文献类型：期刊论文
| 作者 | Chu ZhuYin1,2; Xu JunJie1,2; Ling XiaoXiao1,2; Zhang Pu3; Cheng Hai3; Guo JingHui1,2; Zhou XinHua1,2 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2022-12-01 |
| 卷号 | 38期号:12页码:3695-3702 |
| ISSN号 | 1000-0569 |
| 关键词 | CA-ID-TIMS U-Pb dating Zircon Double spike |
| DOI | 10.18654/1000-0569/2022.12.09 |
| 英文摘要 | Due to the interferences of U-236(16) O-18 O+ and U-236 O-18 O+ on U-236(18) O-16 O-2(+), a Pb-205-(233) U-(235) U spike rather than a Pb-205-(233) U-(236) U spike is usually used for the single grain zircon CA-ID-TIMS U-Pb dating worldwide. In order to use the Pb-205-(233) U-(236) spike for correcting the U isotope fractionation effect by the 233U 236U double spike, in this study, the impact of isobaric interferences of U-236(16) O-18 O+ and (UO16)-U-236-O-18 O+ on U-236(18) O-16 O-2(+) for the TIMS U isotope analysis is thoroughly addressed. We found that it is critical to ensure the sample is not over-spiked using the Pb-205-U-233-(236) U spike by controlling the amount of the spike to be added into the sample during the CA-ID-TIMS U-Pb analysis. Actually, when the U-238/U-236 ratio in the sample -spike mixture is not <0.5, the effect of the interferences of U-236(16) O-18 O+ and U-236(18) O-16 O+ on U-238(16) -2 on the final U-Pb dating result is not significant. In addition, the importance of the correct setting of the dead -time of SEM ( secondary electron multiplier) for the U and Pb isotope analyses for the CAID-TIMS U-Pb dating has also been fully addressed. Accordingly, a high precision CA-ID-TIMS U-Pb geochronology method for single zircons using Pb-205-U-233-(236) U tracers with in -run measured O-18/O-16 for UO2+ isobaric oxide corrections has been developed. Finally, a standard zircon-ZS was analyzed using the method, yielding a weighted mean Pb-206/(238) U age of 559. 91 0. 25Ma (2 sigma o-, analytical error), which is consistent with the previously reported date within analytical error. Due to the use of U-233-U-236 double spike for internal correction of U isotope fractionation effect, the analytical precision for this standard zircon is better than 0. 05% (2RSE), which is significantly better than that obtained by using the single Pb-205-U-235 tracer. |
| WOS关键词 | ISOTOPE ; OS-186/OS-188 |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| 出版者 | SCIENCE PRESS |
| WOS记录号 | WOS:000905312500009 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/106918]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Chu ZhuYin |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China 3.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 712000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chu ZhuYin,Xu JunJie,Ling XiaoXiao,et al. Precise ID-TIMS U-Pb dating of single zircons using Pb-265-U-233-U-236 tracers : Isobaric oxide corrections for UO2+ with in-run measured O-18/O-16[J]. ACTA PETROLOGICA SINICA,2022,38(12):3695-3702. |
| APA | Chu ZhuYin.,Xu JunJie.,Ling XiaoXiao.,Zhang Pu.,Cheng Hai.,...&Zhou XinHua.(2022).Precise ID-TIMS U-Pb dating of single zircons using Pb-265-U-233-U-236 tracers : Isobaric oxide corrections for UO2+ with in-run measured O-18/O-16.ACTA PETROLOGICA SINICA,38(12),3695-3702. |
| MLA | Chu ZhuYin,et al."Precise ID-TIMS U-Pb dating of single zircons using Pb-265-U-233-U-236 tracers : Isobaric oxide corrections for UO2+ with in-run measured O-18/O-16".ACTA PETROLOGICA SINICA 38.12(2022):3695-3702. |
入库方式： OAI收割
来源：地质与地球物理研究所
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