山东国土资源2023，Vol.39Issue(11)：69-77,9.DOI:10.12128/j.issn.1672-6979.2023.11.008
黄铁矿中硫同位素的LA-MC-ICP-MS分析方法研究
Study on LA-MC-ICP-MS Analysis Method for Sulfur Isotopes in Pyrite
摘要
Abstract
Sulfur is widely distributed in nature.Moreover,sulfur isotopes are significantly fractionated in various geological reservoirs and have become important geochemical tracers for indicating geological and biological evolution processes.Especially in the study of mineralization processes,the sulfur isotope com-position of sulfides has important indicative significance for reflecting the source of ore-forming materials.Micro in-situ analysis technology can directly act on minerals to obtain microscale isotopic composition in-formation,and has great application prospects in the fine research of ore deposit formation.By combining a laser ablation system(LA)with a high-precision multi receiver inductively coupled plasma mass spec-trometer(MC-ICP-MS),a small amount of nitrogen gas was introduced under low frequency(2 Hz)and high energy density(3～5 J/cm2)laser conditions,and a combination of Jet and X-cone was used to achieve in situ(32％)of pyrite micro zones by switching medium resolution modes μm)Accurate and high-precision analysis of sulfur isotope composition.The test values of the reference substance PPP-1 for pyrite are completely consistent with the published values in previous literature within the error range.The average single point analysis accuracy of 834S is 0.015 ‰(2 RSE),and the long-term external reproduc-ibility is 0.26‰(2 SD).关键词
硫同位素/黄铁矿/LA-MC-ICP-MS/微区原位分析Key words
Sulfur isotopes/pyrite/LA-MC-ICP-MS/in situ micro-analysis分类
天文与地球科学引用本文复制引用
张晨西,舒磊,周长祥,徐珺,李增胜,马晓东,孙雨沁,单伟,迟乃杰..黄铁矿中硫同位素的LA-MC-ICP-MS分析方法研究[J].山东国土资源,2023,39(11):69-77,9.基金项目
国家自然科学青年基金项目(编号42203034) （编号42203034）
山东省地质勘查项目(编号鲁勘字[2021]8号) （编号鲁勘字[2021]8号）
山东省自然科学基金青年项目(编号ZR2022QD050) （编号ZR2022QD050）
山东省自然科学基金面上项目(编号ZR2022MD113) （编号ZR2022MD113）
