High-precision tungsten isotopic measurement by negative thermal ionization mass spectrometry (NTIMS)
文献类型：期刊论文
| 作者 | Xu JunJie1,2; Chu ZhuYin2; Liu JinGao3; Wu HuaiChun1; Wang MengJie2,4; Li ChaoFeng2; Guo JingHui2 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2019 |
| 卷号 | 35期号:2页码:606-616 |
| 关键词 | W isotopes NTIMS Isobaric oxide correction High-precision |
| ISSN号 | 1000-0569 |
| DOI | 10.18654/1000-0569/2019.02.20 |
| 英文摘要 | High precision W isotopic measurement is of great importance for investigation of the origin and early evolution of the Earth, the Moon and other planets in the Solar System, the core-mantle interaction and other related fields. In this study, a newly high precision W isotopic measurement method by negative thermal ionization mass spectrometry (NTIMS) (measuring WO3- ion beams) is presented. The W isotopes were measured in a multi-static analytical protocol with two lines of acquisition. O-18/O-16 ratios were measured in-run on per-integration basis and O-17/O-16 ratios were calculated according to the correlation trend line of mass fractionation between O-17/O-16 and O-18/O-16 obtained from OsO3- measurements by NTIMS (Chu et al., 2015), to perform isobaric oxide corrections. The measurement results between multi-dynamic and multi-static data reduction methods were thoroughly compared. With the multi-dynamic data reduction mode, the external precision (2RSD) of W-182/W-184 normalized to W-186/W-184 = 0. 92767 (named as (W-182/W-184)(N6/4-mdyn)) in a measurement period could reach 3 x 10(-6) similar to 6 x 10(-6), but the difference of the average of (W-182/W-184)(N6/4-mdyn) between two measurement periods could be up to similar to 10 x 10(-6). The external precision (2RSD) of W-182/W-184 normalized to W-186/W-183 =1 . 9859 with the multi-static data reduction mode (named as (W-182/(184) W)(N6/3-mstat); the same below) could reach 5 x 10(-6) similar to 6 x 10(-6) in a measurement period, and difference of the average of (W-182/W-184)(N6/3mstat) at between two measurement periods was about 4 x 10(-6). However, when normalizing to W-186/W-184 = 0. 92767 with the multi-static data reduction mode, an obvious residual linear correlation between fractionation-corrected W-182/W-184 and W-183/W-184 (i e., (W-182/W-184)(N6/3-mstat) and (W-183/W-184)-(N6/4-mstat)) could be observed. The variation of the W-182/W-184 ratios during different measurement periods and the correlation between W-182/W-184 and W-183/W-184 mentioned above are most likely the results of Faraday cup degradation over months-long intervals. Since the multi dynamic data reduction method can simultaneously eliminate the Faraday cup efficiency and mass fractionation effects, and can achieve similar to 3 x 10(-6) external precision (2RSD) in a measurement period, we recommend to use multi-dynamic data reduction method for W isotopic measurement. |
| WOS关键词 | EARLY EVOLUTION ; SOLAR-SYSTEM ; EARTH ; FRACTIONATION ; DIFFERENTIATION ; ACCRETION ; W-182 ; CONSTRAINTS ; CHRONOMETRY ; MANTLE |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000471114000020 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/92497]  |
| 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.China Univ Geosci, Sch Ocean Sci, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 3.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu JunJie,Chu ZhuYin,Liu JinGao,et al. High-precision tungsten isotopic measurement by negative thermal ionization mass spectrometry (NTIMS)[J]. ACTA PETROLOGICA SINICA,2019,35(2):606-616. |
| APA | Xu JunJie.,Chu ZhuYin.,Liu JinGao.,Wu HuaiChun.,Wang MengJie.,...&Guo JingHui.(2019).High-precision tungsten isotopic measurement by negative thermal ionization mass spectrometry (NTIMS).ACTA PETROLOGICA SINICA,35(2),606-616. |
| MLA | Xu JunJie,et al."High-precision tungsten isotopic measurement by negative thermal ionization mass spectrometry (NTIMS)".ACTA PETROLOGICA SINICA 35.2(2019):606-616. |
入库方式： OAI收割
来源：地质与地球物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。