Experimental constraints on metal-silicate partitioning of chlorine and implications for planetary core formation
文献类型：期刊论文
| 作者 | Yang, Xueping1,2,3; Du, Zhixue1,3; Li, Yuan1,3
|
| 刊名 | GEOCHIMICA ET COSMOCHIMICA ACTA
 |
| 出版日期 | 2023-08-15 |
| 卷号 | 355页码:62-74 |
| 关键词 | Chlorine Core formation Planet formation Volatile accretion |
| ISSN号 | 0016-7037 |
| DOI | 10.1016/j.gca.2023.06.017 |
| 英文摘要 | Chlorine (Cl) is critical for Earth's habitability and an important tracer for volatile accretion processes. Yet its chemical behavior during core formation, one of the major events throughout planetary formation, is still poorly understood. This is primarily hindered by experimental challenges of reproducing such extreme pressure and temperature conditions and characterizing chemical compositions of recovered samples. Here we perform experiments on Cl partitioning between iron-rich metallic melt (core analog) and silicate melt (mantle analog) at temperatures of 1900-2400 K and pressures of 1-18 gigapascals to simulate core-mantle differentiation of terrestrial planets. More importantly, to avoid likely complications of Cl loss due to wet or oil polishing, we find it is critical to apply dry polishing to recovered samples as shown in previous work focusing on halogens. Our determined partition coefficients of Cl between metallic melt and silicate melt range from <0.003 to 1.38, which shows its siderophile (iron-loving) behavior for the first time. Moreover, we find Cl gradually prefers metallic melt as the increase of pressure, while confirming a positive effect of oxygen contents in metallic liquid. Considering plausible core formation scenarios for Earth and Mars, our results indicate that Cl abundance in Mars' mantle could be explained by a single-stage core formation scenario. While for the Cl budget in Earth's mantle, multi-stage core formation with partial core-mantle equilibrium may be required, and this would provide further constraints for dynamics of core formation and volatile accretion. |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001039481900001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/74625]  |
| 专题 | 同位素地球化学国家重点实验室 |
| 通讯作者 | Du, Zhixue |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China 2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 3.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Xueping,Du, Zhixue,Li, Yuan. Experimental constraints on metal-silicate partitioning of chlorine and implications for planetary core formation[J]. GEOCHIMICA ET COSMOCHIMICA ACTA,2023,355:62-74. |
| APA | Yang, Xueping,Du, Zhixue,&Li, Yuan.(2023).Experimental constraints on metal-silicate partitioning of chlorine and implications for planetary core formation.GEOCHIMICA ET COSMOCHIMICA ACTA,355,62-74. |
| MLA | Yang, Xueping,et al."Experimental constraints on metal-silicate partitioning of chlorine and implications for planetary core formation".GEOCHIMICA ET COSMOCHIMICA ACTA 355(2023):62-74. |
入库方式： OAI收割
来源：广州地球化学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。