Elemental and isotopic compositions of the hydrothermal sulfide on the East Pacific Rise near 13 degrees N

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋地质与环境重点实验室

	Elemental and isotopic compositions of the hydrothermal sulfide on the East Pacific Rise near 13 degrees N
	Zeng ZhiGang 1; Chen DaiGeng 1,2; Yin XueBo 1; Wang XiaoYuan 1; Zhang GuoLiang 1,2; Wang XiaoMei 1,2
刊名	SCIENCE CHINA-EARTH SCIENCES
	2010-02-01
卷号	53 期号:2 页码:253-266
关键词	variation element isotopic composition hydrothermal sulfide East Pacific Rise 13 degrees N
英文摘要	The mineralogical, elemental, and isotopic characteristics of a hydrothermal sulfide sample from one dredge station (12 degrees 42.30'N, 103 degrees 54.48' W, water depth 2655 m) on the East Pacific Rise near 13 degrees N were analyzed. The hydrothermal sulfide was composed mainly of sphalerite, chalcopyrite, and pyrite and was a Zn-rich sulfide; in layer ep-s-1, goethite formed by secondary oxidation was found. The concentrations of rare elements, such as Li (0.15 x 10(-6)-0.30 x 10(-6)), Be (0.01x10(-6)-0.05x10(-6)), Zr (73.8x10(-9)-1344x10(-9)), Nb (8.14x10(-9)-64.7x10(-9)), Hf (2.54x10(-9)-28.0x10(-9)), and Ta (0.203x10(-9)-1.21x10(-9)), were far lower in the hydrothermal sulfide than in the ocean crust, whereas the content of Au was higher and the contents of Co, Ni, Sr, Cs, Ba, Bi, and U were low. The correlations between Zn and Cr, Cd and Ga, Cu and P, P and In (R(2) > 0.8) were positive, whereas those between Zn and Fe, Cu, and Ba (R(2) > 0.8) were distinctly negative. From low-temperature mineral assemblages to high-temperature mineral assemblages, the spatial distributions of dispersive and rare elements (e.g. In, Li, Cs) in the hydrothermal sulfide displayed corresponding variations. The variations observed in some elements (e.g., Cd, Cs, P) are controlled by Zn, Fe, and Cu sulfides, respectively. Seafloor weathering accounts for the enrichment of V, Mn, and rare earth elements (REE) in the henna sulfide-oxidation layer that bears the secondary oxide mineral, leading to identical REE patterns for this layer (ep-s-1) and seawater. Seafloor weathering also distinctly affects the correlations between the element ratios of the hydrothermal sulfide. From high-temperature mineral assemblages to low-temperature mineral assemblages, Fe content and delta(34)S value of the hydrothermal sulfide increase gradually, and Zn content and lead isotopic ratios decrease gradually on the contrary, which indicate the influences of seawater on elements and the sulfur and lead isotopic compositions enhance gradually during the formation of hydrothermal sulfides.
收录类别	SCI
语种	英语
WOS记录号	WOS:000276595800009
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/32798]
专题	海洋研究所_海洋地质与环境重点实验室
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Seafloor Hydrothermal Act Lab, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zeng ZhiGang,Chen DaiGeng,Yin XueBo,et al. Elemental and isotopic compositions of the hydrothermal sulfide on the East Pacific Rise near 13 degrees N[J]. SCIENCE CHINA-EARTH SCIENCES,2010,53(2):253-266.
APA	Zeng ZhiGang,Chen DaiGeng,Yin XueBo,Wang XiaoYuan,Zhang GuoLiang,&Wang XiaoMei.(2010).Elemental and isotopic compositions of the hydrothermal sulfide on the East Pacific Rise near 13 degrees N.SCIENCE CHINA-EARTH SCIENCES,53(2),253-266.
MLA	Zeng ZhiGang,et al."Elemental and isotopic compositions of the hydrothermal sulfide on the East Pacific Rise near 13 degrees N".SCIENCE CHINA-EARTH SCIENCES 53.2(2010):253-266.