Rubidium Isotope Ratios of International Geological Reference Materials
文献类型：期刊论文
| 作者 | Zhang, Zhuoying1,2; Ma, Jinlong1,2 ; Zhang, Le2; Liu, Ying2; Wei, Gangjian1,2
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| 刊名 | GEOSTANDARDS AND GEOANALYTICAL RESEARCH
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| 出版日期 | 2023 |
| 卷号 | 47期号:3页码:697-712 |
| 关键词 | FRACTIONATION POTASSIUM STRONTIUM EARTH RB SEAWATER ELEMENTS CATIONS MANTLE CESIUM |
| ISSN号 | 1639-4488 |
| DOI | 10.1111/ggr.12484 |
| 英文摘要 | In this study we determined rubidium isotope ratios in twenty-one commonly used international geological reference materials, including igneous, sedimentary and metamorphic rocks, as well as an IAPSO seawater reference material. All δ87Rb results were obtained relative to the NIST SRM 984 reference material. For most reference materials, Rb was purified using a single column loaded with Sr-spec resin. For reference materials containing low Rb but high mass fractions of matrix elements (such as basic rock and seawater), Rb was purified using two-column chromatography, with the first column packed with AGMP-50 resin and the second column packed with Sr-spec resin. Two methods for instrumental mass bias correction, sample-standard bracketing (SSB) mode, and the combined sample-standard bracketing and Zr internal normalisation (C-SSBIN) method, were compared for Rb isotopic?measurements by multi-collector inductively coupled plasma-mass spectrometry (MC-ICP-MS). The long-term reproducibility of Rb isotopic measurements using both methods was similar, better than 0.06‰ (2s, standard deviation) for NIST SRM 984. Significant Rb isotopic fractionation was observed among the reference materials, with an overall variation in δ87Rb values of approximately 0.5‰. The δ87Rb values of igneous rocks ranged from -0.28‰ to +0.06‰, showing a trend from heavier isotopic compositions in mafic rocks to lighter δ87Rb values in the more evolved felsic rocks. The sedimentary and metamorphic rocks had Rb isotope ratios similar to those of igneous rocks. The δ87Rb values of the reference materials related to low-temperature geological processes showed a wider range than those of high-temperature processes. Notably, the IAPSO seawater reference material had a δ87Rb value of +0.14‰, which deviated from that of igneous rocks, and represents the heaviest reservoir of Rb isotopes found thus far on Earth. The comprehensive dataset presented here has the potential to serve for quality assurance purposes, and provide a framework for interlaboratory comparisons of Rb isotope ratios. ? 2023 The Authors. Geostandards and Geoanalytical Research ? 2023 International Association of Geoanalysts. |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000974828100001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/80285]  |
| 专题 | 同位素地球化学国家重点实验室 |
| 作者单位 | 1.Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou; 511458, China 2.State Key Laboratory of Isotope Geochemistry, CAS Center for Excellence in Deep Earth Science, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou; 510640, China |
| 推荐引用方式 GB/T 7714 | Zhang, Zhuoying,Ma, Jinlong,Zhang, Le,et al. Rubidium Isotope Ratios of International Geological Reference Materials[J]. GEOSTANDARDS AND GEOANALYTICAL RESEARCH,2023,47(3):697-712. |
| APA | Zhang, Zhuoying,Ma, Jinlong,Zhang, Le,Liu, Ying,&Wei, Gangjian.(2023).Rubidium Isotope Ratios of International Geological Reference Materials.GEOSTANDARDS AND GEOANALYTICAL RESEARCH,47(3),697-712. |
| MLA | Zhang, Zhuoying,et al."Rubidium Isotope Ratios of International Geological Reference Materials".GEOSTANDARDS AND GEOANALYTICAL RESEARCH 47.3(2023):697-712. |
入库方式： OAI收割
来源：广州地球化学研究所
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