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High-precision potassium isotope analysis using the Nu Sapphire collision cell (CC)-MC-ICP-MS

文献类型：期刊论文

作者Li, Wenjun2; Cui, Mengmeng2,3; Pan, Qiqi3,4; Wang, Jing2; Gao, Bingyu2; Liu, Shanke2; Yuan, Meng3,4; Su, Benxun2,3; Zhao, Ye1; Teng, Fang-Zhen5
刊名SCIENCE CHINA-EARTH SCIENCES
出版日期2022-06-20
页码12
关键词CC-MC-ICP-MS Potassium isotopes Geostandards Sample-standard bracketing method Low energy path
ISSN号1674-7313
DOI10.1007/s11430-022-9948-6
英文摘要This study presents high-precision analyses of stable potassium (K) isotope ratio using the recently-developed, collision-cell multi-collector inductively coupled plasma mass spectrometry (CC-MC-ICP-MS, Nu Sapphire). The accuracy of our analyses is confirmed by measuring well-characterized geostandards (including rocks and seawater). Our results are consistent with literature values and a precision of 0.04 parts per thousand (2SD) has been achieved based on multiple measurements of BCR-2 geostandard over a six-month period. We also evaluate factors that may lead to artificial isotope fractionations, including the mismatches in K concentration and acid molarity between samples and bracketing standards, as well as potential matrices. As the K adsorption capacity of AGW50-X8 (200-400 mesh) is reduced with an increasing amount of matrix elements, less than 150 mu g K was loaded during the column chemistry. To evaluate the potential use of K isotopes as an archive of paleo seawater composition, delta K-41 values of an international seawater standard (IAPSO), a Mn-nodule (NOD-P-1), and two iron formation standards (FeR-2 and FeR-4) are reported. The delta K-41 value of IAPSO is consistent with other seawater samples reported previously, further substantiating a homogeneous K isotopic distribution in modern global oceans. The K isotopes in Mn-nodule (NOD-P-1: -0.121 +/- 0.013 parts per thousand) and iron formation samples (FeR-2: -0.538 +/- 0.009 parts per thousand; FeR-4: -0.401 +/- 0.008 parts per thousand) seem to be an effective tracer of their formation genesis and compositional changes of ancient seawater. Our results suggest that high-precision measurements of stable K isotopes can be routinely obtained and open up a large variety of geological applications, such as continental weathering, hydrothermal circulation and alteration of oceanic crust.
WOS关键词MC-ICP-MS ; MANTLE ; FRACTIONATION
资助项目Experimental Technology Innovation Fund of the Institute of Geology and Geophysics, Chinese Academy of Sciences[TEC 202103] ; Youth Innovation Promotion Association, Chinese Academy of Sciences
WOS研究方向Geology
语种英语
WOS记录号WOS:000815406700001
出版者SCIENCE PRESS
资助机构Experimental Technology Innovation Fund of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Experimental Technology Innovation Fund of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Experimental Technology Innovation Fund of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Experimental Technology Innovation Fund of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Experimental Technology Innovation Fund of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Experimental Technology Innovation Fund of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Experimental Technology Innovation Fund of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Experimental Technology Innovation Fund of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Experimental Technology Innovation Fund of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Experimental Technology Innovation Fund of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Experimental Technology Innovation Fund of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Experimental Technology Innovation Fund of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Experimental Technology Innovation Fund of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Experimental Technology Innovation Fund of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Experimental Technology Innovation Fund of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Experimental Technology Innovation Fund of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences
源URL[http://ir.iggcas.ac.cn/handle/132A11/105892]  
专题地质与地球物理研究所_中国科学院矿产资源研究重点实验室
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Li, Wenjun; Su, Benxun
作者单位1.Nu Instruments, Wrexham LL13 9X8, Wales
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
5.Univ Washington, Dept Earth & Space Sci, Isotope Lab, Seattle, WA 98195 USA
6.China Univ Geosci Beijing, Inst Earth Sci, Beijing 100083, Peoples R China
推荐引用方式
GB/T 7714		 Li, Wenjun,Cui, Mengmeng,Pan, Qiqi,et al. High-precision potassium isotope analysis using the Nu Sapphire collision cell (CC)-MC-ICP-MS[J]. SCIENCE CHINA-EARTH SCIENCES,2022:12.
APA Li, Wenjun.,Cui, Mengmeng.,Pan, Qiqi.,Wang, Jing.,Gao, Bingyu.,...&Han, Guilin.(2022).High-precision potassium isotope analysis using the Nu Sapphire collision cell (CC)-MC-ICP-MS.SCIENCE CHINA-EARTH SCIENCES,12.
MLA Li, Wenjun,et al."High-precision potassium isotope analysis using the Nu Sapphire collision cell (CC)-MC-ICP-MS".SCIENCE CHINA-EARTH SCIENCES (2022):12.

入库方式： OAI收割

来源：地质与地球物理研究所

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