Partitioning of tin between mafic minerals, Fe-Ti oxides and silicate melts: Implications for tin enrichment in magmatic processes
文献类型：期刊论文
| 作者 | Wei, Chunxia1,2,3; Xiong, Xiaolin1,2,3; Wang, Jintuan2,3; Huang, Fangfang2,3; Gao, Mingdi2,3 |
| 刊名 | GEOCHIMICA ET COSMOCHIMICA ACTA
 |
| 出版日期 | 2024-05-01 |
| 卷号 | 372页码:81-100 |
| 关键词 | Improved capsule designs Mineral/melt Sn partitioning Mafic minerals and oxides Oxygen fugacity |
| ISSN号 | 0016-7037 |
| DOI | 10.1016/j.gca.2024.03.011 |
| 英文摘要 | The partition coefficients of Sn (tin) between minerals and silicate melts (D-Sn(min/melt)) are vital for understanding the Sn enrichment during magmatic processes related to tin-granites. However, experimentally determined D-Sn(min/melt) values remain scarce due to the difficulty in avoiding severe Sn loss to noble metal capsules. In this study, we performed mineral/melt Sn partitioning experiments at 0.5-1.0 GPa, 850-1000 degrees C, and fO(2) of FMQ + 8 to similar to FMQ - 1. The fO(2)s were imposed by solid buffers of Ru-RuO2, Re-ReO2, Ni-NiO, Co-CoO and graphite using three improved capsule designs: 1) a single sample capsule (Pt) for the Ru-RuO2 buffered runs, 2) double capsules with Pt95Rh05 as outer capsule and Re as inner sample capsule for the graphite and Re-ReO2 buffered runs, and 3) triple capsules for the Co-CoO and Ni-NiO buffered runs, with Pt95Rh05 (or Au) as outer capsule, Re lined Pt as inner sample capsule. These new capsule designs avoided significant Sn loss and enabled us to obtain accurate D-Sn(min/melt) at a controlled fO(2). The experimental results show that D-Sn(min/melt) values are 0.08-12.66 for amphibole, 0.01-5.55 for biotite, 0.09-10.39 for clinopyroxene, 0.004-0.97 for orthopyroxene, < 0.01 for olivine, 1.34-108.43 for Ti-magnetite, 0.04-4.17 for spinel and 0.10-0.64 for ilmenite. The large variation of D-Sn for each mineral was mainly ascribed to the effect of fO(2), which results in an arresting decrease of D-Sn with decreasing fO(2). Under the reducing conditions (fO(2) < FMQ), Sn is highly incompatible (D-Sn < 0.1) in almost all the minerals. Modeling results indicate that partial melting at low fO(2) conditions results in Sn enrichment in the derived magma, while subsequent high degree of fractional crystallization is also important for the Sn enrichment in the residual melt. The experimental and modeling results thus explain why major primary tin deposits are always related to reducing and highly fractionated granites. |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001225042900001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/76922]  |
| 专题 | 同位素地球化学国家重点实验室 |
| 通讯作者 | Xiong, Xiaolin; Wang, Jintuan |
| 作者单位 | 1.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 2.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wei, Chunxia,Xiong, Xiaolin,Wang, Jintuan,et al. Partitioning of tin between mafic minerals, Fe-Ti oxides and silicate melts: Implications for tin enrichment in magmatic processes[J]. GEOCHIMICA ET COSMOCHIMICA ACTA,2024,372:81-100. |
| APA | Wei, Chunxia,Xiong, Xiaolin,Wang, Jintuan,Huang, Fangfang,&Gao, Mingdi.(2024).Partitioning of tin between mafic minerals, Fe-Ti oxides and silicate melts: Implications for tin enrichment in magmatic processes.GEOCHIMICA ET COSMOCHIMICA ACTA,372,81-100. |
| MLA | Wei, Chunxia,et al."Partitioning of tin between mafic minerals, Fe-Ti oxides and silicate melts: Implications for tin enrichment in magmatic processes".GEOCHIMICA ET COSMOCHIMICA ACTA 372(2024):81-100. |
入库方式： OAI收割
来源：广州地球化学研究所
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