Zircon Solubility in Solute-Rich Supercritical Fluids and Zr Transfer From Slab to Wedge in the Deep Subduction Process
文献类型：期刊论文
| 作者 | Chen, Wei1,2,3,5; Xiong, Xiaolin1,2,4,5; Takahashi, Eiichi1,2 |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
 |
| 出版日期 | 2021-09-01 |
| 卷号 | 126期号:9页码:16 |
| 关键词 | deep subduction supercritical fluid zircon solubility Zr transfer |
| ISSN号 | 2169-9313 |
| DOI | 10.1029/2021JB021970 |
| 通讯作者 | Xiong, Xiaolin(xiongxl@gig.ac.cn) |
| 英文摘要 | Zircon solubility in aqueous fluids, hydrous melts, and supercritical fluids is important for understanding the high field strength elements (HFSEs) chemical transport in subduction zones. Although zircon solubility was extensively studied in aqueous fluids and hydrous silicate melts, its solubility in solute-rich fluids or supercritical fluids is poorly known. Here, we experimentally determined zircon solubility in KAlSi3O8 (+/- K2O +/- Al2O3) - H2O supercritical fluids at 2.0-6.0 GPa and 800 degrees C-1000 degrees C, close to the slab-top conditions at sub-arc depths. The results show that zircon solubility (expressed as ZrO2 content at zircon saturation) ranges from 65 to 6,400 ppm ZrO2, 10-100 times higher than that in dilute aqueous fluids; it increases with temperature, solute content, and solute alkalinity (molar K/Al ratio) but decreases with pressure. The experiments at 2.0 GPa show that solute alkalinity in addition to temperature and solute content exerts a primary control on zircon solubility, while the experiments at 4.0-6.0 GPa show that the negative effect of pressure on zircon solubility is offset by the increase in solute alkalinity due to the crystallization of Al-rich phases kyanite and muscovite. We suggest that high-alkali supercritical fluids during deep subduction could be significant transfer agents for Zr from slab to mantle wedge. |
| 资助项目 | National Key Research and Development Program of China[2018YFA0702704] ; NSFC[92062222] ; NSFC[41573053] ; NSFC[41921003] ; NSFC[42003049] ; [QYZDJ-SSW-DQC012] ; [GML2019ZD0202] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000703087900032 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/176485]  |
| 专题 | 海洋研究所_深海极端环境与生命过程研究中心 |
| 通讯作者 | Xiong, Xiaolin |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou, Peoples R China 2.CAS Ctr Excellence Deep Earth Sci, Guangzhou, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Deep Sea Res Ctr, Qingdao, Peoples R China 4.Southern Marine Sci & Engn Guangdong Lab Guangzho, Guangzhou, Peoples R China 5.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Wei,Xiong, Xiaolin,Takahashi, Eiichi. Zircon Solubility in Solute-Rich Supercritical Fluids and Zr Transfer From Slab to Wedge in the Deep Subduction Process[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2021,126(9):16. |
| APA | Chen, Wei,Xiong, Xiaolin,&Takahashi, Eiichi.(2021).Zircon Solubility in Solute-Rich Supercritical Fluids and Zr Transfer From Slab to Wedge in the Deep Subduction Process.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,126(9),16. |
| MLA | Chen, Wei,et al."Zircon Solubility in Solute-Rich Supercritical Fluids and Zr Transfer From Slab to Wedge in the Deep Subduction Process".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 126.9(2021):16. |
入库方式： OAI收割
来源：海洋研究所
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