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Transition from carbonatitic magmas to hydrothermal brines: Continuous dilution or fluid exsolution?

文献类型：期刊论文

作者Yuan, Xueyin3; Zhong, Richen2; Xiong, Xin3; Gao, Jing1; Ma, Yubo3
刊名SCIENCE ADVANCES
出版日期2023-07-01
卷号9期号:29页码:9
ISSN号2375-2548
DOI10.1126/sciadv.adh0458
通讯作者Yuan, Xueyin(xueyinyuan@live.com) ; Zhong, Richen(zhongrichen@126.com)
英文摘要Carbonatites are the most important primary sources for the rare earth elements (REEs). While fractional crystallization of carbonate minerals results in the enrichment of volatiles, alkalis, and REEs in the remaining melts, the transition from carbonatitic magmas to hydrothermal brines remains unclear. Here, we investigated the pressure-temperature-composition (P-T-X) properties of the Na2CO3-H2O system up to 700 degrees C and 11.0 kbar using a hydrothermal diamond anvil cell and a Raman spectrometer. Our results show that Na2CO3 becomes increasingly soluble under high P-T conditions, leading to the disappearance of melt-fluid immiscibility and the continuous transition from Na2CO3 melts to hydrothermal brines under deep crustal conditions. Given the abundance of Na2CO3 in highly evolved carbonatitic systems, we suggest that the continuous melt-fluid transition in deep-seated carbonatites results in REEs being sufficiently concentrated in the brine-melts to form economic ore bodies, whereas in shallow systems, REEs preferentially partition into carbonatitic magmas over synmagmatic brines and disperse in carbonatite rocks that underwent limited fractionation.
WOS关键词AMBA DONGAR CARBONATITE ; DIAMOND-ANVIL CELL ; SODIUM-CARBONATE ; RUSSIA IMPLICATIONS ; RAMAN-SPECTROSCOPY ; AQUEOUS-SOLUTIONS ; PRESSURE SENSOR ; REE MINERALS ; INCLUSIONS ; COMPLEX
资助项目National Natural Science Foundation of China[42222303] ; National Natural Science Foundation of China[91858206] ; China State Key Research Plan[2021YFC2901703]
WOS研究方向Science & Technology - Other Topics
语种英语
出版者AMER ASSOC ADVANCEMENT SCIENCE
WOS记录号WOS:001032686800010
资助机构National Natural Science Foundation of China ; China State Key Research Plan
源URL[http://ir.idsse.ac.cn/handle/183446/10432]  
专题深海科学研究部_深海极端环境模拟研究实验室
通讯作者Yuan, Xueyin; Zhong, Richen
作者单位1.Chinese Acad Sci, Inst Deep sea Sci & Engn, Lab Extraterr Ocean Syst, Sanya 572000, Peoples R China
2.Univ Sci & Technol Beijing, Sch Civil & Resource Engn, Beijing 100083, Peoples R China
3.Chinese Acad Geol Sci, Inst Mineral Resources, MNR Key Lab Metallogeny & Mineral Assessment, Beijing 100037, Peoples R China
推荐引用方式
GB/T 7714		 Yuan, Xueyin,Zhong, Richen,Xiong, Xin,et al. Transition from carbonatitic magmas to hydrothermal brines: Continuous dilution or fluid exsolution?[J]. SCIENCE ADVANCES,2023,9(29):9.
APA Yuan, Xueyin,Zhong, Richen,Xiong, Xin,Gao, Jing,&Ma, Yubo.(2023).Transition from carbonatitic magmas to hydrothermal brines: Continuous dilution or fluid exsolution?.SCIENCE ADVANCES,9(29),9.
MLA Yuan, Xueyin,et al."Transition from carbonatitic magmas to hydrothermal brines: Continuous dilution or fluid exsolution?".SCIENCE ADVANCES 9.29(2023):9.

入库方式： OAI收割

来源：深海科学与工程研究所

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