Thermodynamic properties of ruthenium (IV) chloride complex and the transport of ruthenium in magmatic-hydrothermal fluids

doi:10.1016/j.oregeorev.2021.104043

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	Thermodynamic properties of ruthenium (IV) chloride complex and the transport of ruthenium in magmatic-hydrothermal fluids
	Yan, Haibo 1,2,3,6; Sun, Weidong4,5,6 ; Liu, Junfeng 7; Tu, Xianglin 1,2; Ding, Xing 1,2,6
	2021-04-01
发表期刊	ORE GEOLOGY REVIEWS
ISSN	0169-1368
卷号	131 页码:12
通讯作者	Ding, Xing(xding@gig.ac.cn)
摘要	Thermodynamic properties of platinum-group element (PGE) coordination complexes are significant for our understanding of PGE mobilization, transport, and deposition in hydrothermal fluids. This study conducted hydrolysis experiments of ruthenium (IV) chloride complex (K2RuCl6) at temperatures of 200?600 ?C and water pressure of 100 MPa, combined with related geochemical modeling, to quantitatively investigate the thermodynamic behavior of the Ru-Cl complex in magmatic-hydrothermal fluids. The results show that the hydrolysis reactions of [RuCl6]2? get equilibrium within 24 hours at 200 ?C and have positive temperature dependence. The cumulative hydrolysis constants (K) calculated for the reactions fit well on a linear correlation with temperatures (T, Kelvin): lnK = (42.95 ? 4.13) ? (56205 ? 2594)/T. Based on the cumulative hydrolysis constants obtained, we established a preliminary model to decipher the quantitative relationship among the temperature, pH, total chlorine concentration, and the mobility of the Ru-Cl complex in natural Cl-bearing hydrothermal fluids. The calculation results demonstrate that Ru could be mobile in the Cl-bearing (0.05?0.5 wt%), low to moderate temperature (<550 ?C), and acidic (pH < 4) fluids, and be highly mobile in the Cl-rich (0.5?20 wt%), acidic - weakly alkaline fluids. The fluid?s pH and total chlorine concentration dominate the Ru-Cl complex?s stability and the Ru transport. Therefore, dilution of ambient seawater on the hydrothermal fluids and plumes related to the magmatic-hydrothermal vent systems is the geochemical barrier, which is advantageous to PGE precipitation and mineralization. Furthermore, this study highlights the importance of metal source for the PGE mobilization and deposition and suggests that the source?s deficiency substantially limits the PGE mobilization, transport, and deposition, resulting in the scarcity of hydrothermal PGE deposits in the crust.
关键词	Ru-Cl complex Hydrolysis Transport Hydrothermal fluids Submarine hydrothermal fluids
DOI	10.1016/j.oregeorev.2021.104043
收录类别	SCI
语种	英语
资助项目	Chinese Academy of Sciences[XDB42000000] ; National Key R&D Program of China[2016YFC0600408] ; National Natural Science Foundation of China[41730423] ; National Natural Science Foundation of China[41773054]
WOS研究方向	Geology ; Mineralogy ; Mining & Mineral Processing
WOS类目	Geology ; Mineralogy ; Mining & Mineral Processing
WOS记录号	WOS:000632780100001
出版者	ELSEVIER
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/170330
专题	中国科学院海洋研究所
通讯作者	Ding, Xing
作者单位	1.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China 2.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Geochem, CAS Key Lab Mineral & Metallogeny, Guangzhou 510640, Peoples R China 4.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao 266071, Peoples R China 5.Chinese Acad Sci, Ctr Deep Sea Res, Inst Oceanog, Qingdao 266071, Peoples R China 6.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 7.Changan Univ, Sch Earth Sci & Resources, Xian 710054, Peoples R China
推荐引用方式 GB/T 7714	Yan, Haibo,Sun, Weidong,Liu, Junfeng,et al. Thermodynamic properties of ruthenium (IV) chloride complex and the transport of ruthenium in magmatic-hydrothermal fluids[J]. ORE GEOLOGY REVIEWS,2021,131:12.
APA	Yan, Haibo,Sun, Weidong,Liu, Junfeng,Tu, Xianglin,&Ding, Xing.(2021).Thermodynamic properties of ruthenium (IV) chloride complex and the transport of ruthenium in magmatic-hydrothermal fluids.ORE GEOLOGY REVIEWS,131,12.
MLA	Yan, Haibo,et al."Thermodynamic properties of ruthenium (IV) chloride complex and the transport of ruthenium in magmatic-hydrothermal fluids".ORE GEOLOGY REVIEWS 131(2021):12.

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