Zinc partitioning between minerals and melts: Implications for the origins of the iron-depletion trend in convergent-margin magmatism
文献类型：期刊论文
| 作者 | Sun, Zhongxing1,2,5; Xiong, Xiaolin1,2,5; O'neill, Hugh St. C.5,6; Li, Li5; Gao, Mingdi5; Chen, Wei3,4; Liu, Xingcheng2,5 |
| 刊名 | GEOCHIMICA ET COSMOCHIMICA ACTA
 |
| 出版日期 | 2025-11-01 |
| 卷号 | 408页码:212-232 |
| 关键词 | Partition coefficients High-pressure experiments Magnetite Zinc Calc-alkaline differentiation |
| ISSN号 | 0016-7037 |
| DOI | 10.1016/j.gca.2025.08.034 |
| 通讯作者 | Liu, Xingcheng(liuxingcheng@gig.ac.cn) |
| 英文摘要 | Zinc shows a marked preference for tetrahedral coordination in oxide and silicate minerals. The only phases among those suggested to be involved in the petrogenesis of basaltic-andesitic-dacitic magmas that has a tetrahedral site suitable for 2+ cations are the spinel group minerals, including magnetite. Zn therefore has the potential to be a geochemical indicator for magnetite in the same way that heavy rare earth elements are for garnet. In this capacity it has the advantage over vanadium in that it has only one oxidation state in silicate melts, namely 2+, making its mineral/melt partitioning dependent on oxygen fugacity only insofar as this variable affects the compositions of the minerals and melts. Here we report experiments on the partitioning of Zn between hydrous andesitic-dacitic melts and all the mineral phases hypothesized to be involved in their petrogenesis, including olivine, orthopyroxene, augitic clinopyroxene, amphibole (hornblende), garnet, ilmenite and magnetite-rich spinel. We combine these results with those available in the literature to show that Zn is indeed highly compatible in the spinels, including magnetite, but incompatible in amphibole and garnet, confirming its usefulness for detecting magnetite fractionation. The behaviour of Zn in a number of convergent-margin magmatic suites shows that magnetite entered the cotectic assemblage when the suites had differentiated to 5 +/- 1 wt% MgO. It is magnetite + amphibole crystallization that causes the depletion of Fe and concomitant enrichment of SiO2 of the calc-alkaline trend. The correlated depletion of V with Zn suggests that this happened under moderately oxidizing conditions, at approximately FMQ +2 (+/- 1), where FMQ is the fayalite-magnetitequartz equilibrium. Thermodynamic analysis of the Zn partitioning data shows that Zn behaves similarly to Mg, and is thus a member of a group of mid-sized divalent cations comprising Mg, Fe2+, Mn, Co, Ni, and Cr2+, whose oxide activity coefficients in silicate melts all vary with melt composition in a remarkably similar manner, despite the differences in their electronic configurations and chemical bonding characteristics, which are so obvious in their crystal chemistry in ferromagnesian silicates and spinels. |
| WOS关键词 | FE-TI OXIDES ; OXYGEN FUGACITY ; OXIDATION-STATE ; CALC-ALKALINE ; ACTIVITY-COEFFICIENTS ; 1ST-ROW TRANSITION ; PHASE-RELATIONS ; SULFIDE PHASES ; MAFIC MINERALS ; SILICATE MELTS |
| 资助项目 | Strategic Priority Research Program of the Chinese Academy of Sciences[XDB0840200] ; National Natural Science Foundation of China[42303029] ; National Natural Science Foundation of China[42573073] ; National Natural Science Foundation of China[42250710679] ; [2024YFF0807401] ; [2023M733506] ; [2024A1515012245] ; [20241AU070007] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001606597400006 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/203746]  |
| 专题 | 海洋研究所_海洋地质与环境重点实验室 |
| 通讯作者 | Liu, Xingcheng |
| 作者单位 | 1.Jilin Univ, Coll Earth Sci, Changchun 130061, Peoples R China 2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China 3.Chinese Acad Sci, Ctr Deep Sea Res, Qingdao, Peoples R China 4.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao, Peoples R China 5.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Deep Earth Proc & Resources, Guangzhou 510640, Peoples R China 6.Monash Univ, Sch Earth Atmosphere & Environm, Melbourne, Vic 3800, Australia |
| 推荐引用方式 GB/T 7714 | Sun, Zhongxing,Xiong, Xiaolin,O'neill, Hugh St. C.,et al. Zinc partitioning between minerals and melts: Implications for the origins of the iron-depletion trend in convergent-margin magmatism[J]. GEOCHIMICA ET COSMOCHIMICA ACTA,2025,408:212-232. |
| APA | Sun, Zhongxing.,Xiong, Xiaolin.,O'neill, Hugh St. C..,Li, Li.,Gao, Mingdi.,...&Liu, Xingcheng.(2025).Zinc partitioning between minerals and melts: Implications for the origins of the iron-depletion trend in convergent-margin magmatism.GEOCHIMICA ET COSMOCHIMICA ACTA,408,212-232. |
| MLA | Sun, Zhongxing,et al."Zinc partitioning between minerals and melts: Implications for the origins of the iron-depletion trend in convergent-margin magmatism".GEOCHIMICA ET COSMOCHIMICA ACTA 408(2025):212-232. |
入库方式： OAI收割
来源：海洋研究所
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