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Sulfide Dissolution on the Nickel Isotopic Composition of Basaltic Rocks

文献类型：期刊论文

作者Sheng, Si-Zhang5; Wang, Shui-Jiong5; Yang, Xi-Ming5; Chen, Li-Hui3,4; Zeng, Gang3; Xiao, Yan2; Shen, Ji1; Dong, Xu-Han5; Lv, Yi-Wen5
刊名JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
出版日期2022-08-01
卷号127期号:8页码:18
关键词Ni isotope basalt sulfide nephelinite metasomatism
ISSN号2169-9313
DOI10.1029/2022JB024555
英文摘要Global basaltic rocks show large variations in nickel (Ni) isotopic compositions relative to peridotites. The origin of this difference remains unknown. We analyzed Ni isotopic compositions of mineral separates from seven Beiyan peridotite xenoliths and 16 nephelinites from eastern China. Spinel is isotopically heavier, and clinopyroxene is systemically lighter than coexisting olivine and orthopyroxene. An ionic model predicts that olivine, orthopyroxene, and spinel are in Ni isotopic equilibrium, whereas clinopyroxene of metasomatic origin is out of equilibrium. The nephelinites have higher Fe3+/sigma Fe but lower delta Ni-60/58 values than the peridotites. Mantle silicate melting likely leads to enrichment of heavy Ni isotopes in melts, and, importantly, it cannot explain the negative correlation between delta Ni-60/58 and Fe3+/sigma Fe of the nephelinites. Therefore, the light Ni isotopic signature requires the involvement of a low-delta Ni-60/58 component. Sulfide is a minor Ni-rich component in the mantle and is isotopically lighter than the silicates. The relative proportion of Ni from sulfides vs. that from silicates varies in mantle-derived magmas, depending on the sulfur content at sulfide saturation and melting degree. Thus, low-degree melts with high abundance of dissolved sulfides can be variably enriched in light Ni isotopes. We propose that enhanced sulfide dissolution at high oxygen fugacity is a key reason for light Ni isotopic compositions in the nephelinites. This sulfide dissolution model may also be responsible for producing the Ni isotopic variation in global mafic lithologies. When the highly oxidized, low-degree melts react with the peridotitic region, they can impart light Ni isotopic signatures to mantle rocks.
WOS关键词NORTH CHINA CRATON ; FE-NI SULFIDES ; MINERAL DISSOLUTION ; CENOZOIC BASALTS ; OXIDATION-STATE ; STABLE-ISOTOPES ; VOLCANIC-ROCKS ; SULFUR-CONTENT ; EASTERN CHINA ; MANTLE
资助项目National Nature Science Foundation of China[41973010] ; Fok Ying-Tong Education Foundation of China
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000842739900001
出版者AMER GEOPHYSICAL UNION
资助机构National Nature Science Foundation of China ; National Nature Science Foundation of China ; Fok Ying-Tong Education Foundation of China ; Fok Ying-Tong Education Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; Fok Ying-Tong Education Foundation of China ; Fok Ying-Tong Education Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; Fok Ying-Tong Education Foundation of China ; Fok Ying-Tong Education Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; Fok Ying-Tong Education Foundation of China ; Fok Ying-Tong Education Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/108433]  
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Wang, Shui-Jiong
作者单位1.Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Crust Mantle Mat & Environm, Hefei, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China
3.Nanjing Univ, Sch Earth Sci & Engn, State Key Lab Mineral Deposits Res, Nanjing, Peoples R China
4.Northwest Univ, State Key Lab Continental Dynam, Dept Geol, Xian, Peoples R China
5.China Univ Geosci Beijing, State Key Lab Geol Proc & Mineral Resources, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Sheng, Si-Zhang,Wang, Shui-Jiong,Yang, Xi-Ming,et al. Sulfide Dissolution on the Nickel Isotopic Composition of Basaltic Rocks[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2022,127(8):18.
APA Sheng, Si-Zhang.,Wang, Shui-Jiong.,Yang, Xi-Ming.,Chen, Li-Hui.,Zeng, Gang.,...&Lv, Yi-Wen.(2022).Sulfide Dissolution on the Nickel Isotopic Composition of Basaltic Rocks.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,127(8),18.
MLA Sheng, Si-Zhang,et al."Sulfide Dissolution on the Nickel Isotopic Composition of Basaltic Rocks".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 127.8(2022):18.

入库方式： OAI收割

来源：地质与地球物理研究所

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