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

doi:10.1126/sciadv.adh0458

CORC > 深海科学与工程研究所 > 中国科学院深海科学与工程研究所 > 深海科学研究部 > 深海极端环境模拟研究实验室

	Transition from carbonatitic magmas to hydrothermal brines: Continuous dilution or fluid exsolution?
	Yuan, Xueyin 3; Zhong, Richen 2; Xiong, Xin 3; Gao, Jing 1; Ma, Yubo 3
刊名	SCIENCE ADVANCES
	2023-07-01
卷号	9 期号:29 页码:9
ISSN号	2375-2548
DOI	10.1126/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.
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关键词	AMBA DONGAR CARBONATITE ; DIAMOND-ANVIL CELL ; SODIUM-CARBONATE ; RUSSIA IMPLICATIONS ; RAMAN-SPECTROSCOPY ; AQUEOUS-SOLUTIONS ; PRESSURE SENSOR ; REE MINERALS ; INCLUSIONS ; COMPLEX
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
内容类型	期刊论文
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.