Explorations on footprints of salt-rich fluid and salt-depleted fluid immiscibility in hydrothermal systems: Insights from divergent partitioning of sulfate and perchlorate in the ZnSO4-Zn(ClO4)(2)-H2O system

doi:10.1016/j.chemgeo.2021.120520

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

	Explorations on footprints of salt-rich fluid and salt-depleted fluid immiscibility in hydrothermal systems: Insights from divergent partitioning of sulfate and perchlorate in the ZnSO4-Zn(ClO4)(2)-H2O system
	Wan, Ye 3; Chou, I-Ming 3; Wang, Xiaolin 2; Sun, Xiaoming 1
刊名	CHEMICAL GEOLOGY
	2021-12-05
卷号	584 页码:10
关键词	Partitioning behaviors Fluid immiscibility Hydrothermal fluid Geological indicator Raman quantification
ISSN号	0009-2541
DOI	10.1016/j.chemgeo.2021.120520
英文摘要	A variety of salt fluids (e.g., aqueous Li2SO4, ZnSO4 and UO2SO4 fluid) were observed to separate into a heavy salt-rich fluid (F1) and a light salt-depleted fluid (F2) when heated to appropriate temperatures. The F1-F2 immiscibility (FFI) likely provides an efficient pathway for hydrothermal transport and accumulation of certain ore elements and influences the compositional evolution of hydrothermal fluids, as it considerably concentrates these elements into the F1 phase. However, geological studies to date have paid little attention to the occurrence and influence of this kind of fluid immiscibility. The discrepancy may be explained from two perspectives. First, the complex pressure-temperature-composition (P-T-x) conditions of geological fluids may destabilize the FFI or suppress its occurrence. Alternatively, the FFI in geological fluids may be neglected during geologic investigations due to a lack of knowledge. To bridge the gap between experimental research and geological studies, this study aims to reveal more properties of the FFI and establish some geological constraints for discerning the FFI in geological systems. The partitioning behaviors of sulfate (FFI-relevant component) and perchlorate (FFI-irrelevant component) during the FFI and boiling process in the ZnSO4-Zn(ClO4)(2)-H2O system were quantified using Raman spectroscopic analyses integrated with the mass conservation law. Results show inconsistent partitioning behaviors of SO42- and ClO4- during the FFI; SO42- is highly concentrated into the F1 phase relative to the light F2 phase, while ClO4- partitions almost equally between the two phases. On the contrary, SO42- and ClO4- are concentrated proportionally in the residual liquid with boiling. Accordingly, some possible geological constraints, in addition to microthermometry, are postulated for the identification of the FFI in hydrothermal fluids, including (a) the P-T-x trajectory of the fluid intersecting with the FFI's stability region; (b) fluid inclusions showing divergent contents of FFI-relevant components but consistent concentrations of FFI-irrelevant components. This study sheds new light on the research of the salt-rich fluid and salt-depleted fluid immiscibility in geological systems.
资助项目	National Natural Science Foundation of China[41903053] ; National Natural Science Foundation of China[41922023] ; National Natural Science Foundation of China[41973055] ; National Natural Science Foundation of China[91855213] ; Key Frontier Science Program of Chinese Academy of Sciences[QYZDY-SSW-DQC008] ; China Postdoctoral Science Foundation[2019M650835]
WOS关键词	LIQUID PHASE-SEPARATION ; AQUEOUS ZNSO4 SOLUTIONS ; HYGROSCOPIC PROPERTIES ; DEGREES-C ; RAMAN ; PORPHYRY ; VAPOR ; TEMPERATURES ; PRESSURE ; GOLD
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000702310500021
资助机构	National Natural Science Foundation of China ; Key Frontier Science Program of Chinese Academy of Sciences ; China Postdoctoral Science Foundation
内容类型	期刊论文
源URL	[http://ir.idsse.ac.cn/handle/183446/8868]
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	Chou, I-Ming; Wang, Xiaolin
作者单位	1.Sun Yat Sen Univ, Sch Marine Sci, Guangzhou 510006, Peoples R China 2.Nanjing Univ, Sch Earth Sci & Engn, State Key Lab Mineral Deposits Res, Nanjing 210023, Jiangsu, Peoples R China 3.Chinese Acad Sci, Inst Deep Sea Sci & Engn, CAS Key Lab Expt Study Deep Sea Extreme Condit, Sanya 572000, Hainan, Peoples R China
推荐引用方式 GB/T 7714	Wan, Ye,Chou, I-Ming,Wang, Xiaolin,et al. Explorations on footprints of salt-rich fluid and salt-depleted fluid immiscibility in hydrothermal systems: Insights from divergent partitioning of sulfate and perchlorate in the ZnSO4-Zn(ClO4)(2)-H2O system[J]. CHEMICAL GEOLOGY,2021,584:10.
APA	Wan, Ye,Chou, I-Ming,Wang, Xiaolin,&Sun, Xiaoming.(2021).Explorations on footprints of salt-rich fluid and salt-depleted fluid immiscibility in hydrothermal systems: Insights from divergent partitioning of sulfate and perchlorate in the ZnSO4-Zn(ClO4)(2)-H2O system.CHEMICAL GEOLOGY,584,10.
MLA	Wan, Ye,et al."Explorations on footprints of salt-rich fluid and salt-depleted fluid immiscibility in hydrothermal systems: Insights from divergent partitioning of sulfate and perchlorate in the ZnSO4-Zn(ClO4)(2)-H2O system".CHEMICAL GEOLOGY 584(2021):10.