Geochemical anomalies of hydrothermal plume at EPR 13 degrees N

doi:10.1007/s11430-007-0087-8

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

	Geochemical anomalies of hydrothermal plume at EPR 13 degrees N
	Wang XiaoYuan ; Zeng ZhiGang ; Liu ChangHua ; Yin XueBo ; Yu ShaoXiong ; Yuan ChunWei ; Zhang GuoLiang ; Wang XiaoMei
刊名	SCIENCE IN CHINA SERIES D-EARTH SCIENCES
	2007-09-01
卷号	50 期号:9 页码:1433-1440
关键词	Submarine Hydrothermal Activity Plume Hydrothermal Fluid Epr
ISSN号	1006-9313
DOI	10.1007/s11430-007-0087-8
文献子类	Article
英文摘要	During the DY105-12, 14cruise (RN DAYANG YIHAO, November 2003) on East Pacific Rise (EPR) 12-13 degrees N, the submarine hydrothermal activity was investigated and the CTD hydrocast was carried out at EPR12 degrees 39 ' N - 12 degrees 54 ' N. From the temperature anomalies and the concentrations of magnesium, chlorine, bromine in seawater samples, we discover that magnesium depletes 9.3%-22.4%, chlorine and bromine enrich 10.3%-28.7% and 10.7%-29.0% respectively relative to normal seawater at the stations which have chemistry anomalies, moreover temperature and chemistry anomalies are at the same layer. The depletion of magnesium in the plume may be caused by a fluid lacking of magnesium which rises after the hydrothermal fluid reaches the equilibrium with ambient seawater, the enrichment of chlorine and bromine might be the result of inputting later brine which is generated by phase separation due to hydrothermal activity. In addition, the Br/CI ratio in the abnormal layers at the survey area is identical to that in seawater, which implies that halite dissolution (or precipitation) occurs neither when the fluid is vented nor when hydrothermal fluid entraining ambient seawater rises to form plume. From the abnormal instance at E55 station, it is very possible that there might exist a new hydrothermal vent site.; During the DY105-12, 14cruise (RN DAYANG YIHAO, November 2003) on East Pacific Rise (EPR) 12-13 degrees N, the submarine hydrothermal activity was investigated and the CTD hydrocast was carried out at EPR12 degrees 39 ' N - 12 degrees 54 ' N. From the temperature anomalies and the concentrations of magnesium, chlorine, bromine in seawater samples, we discover that magnesium depletes 9.3%-22.4%, chlorine and bromine enrich 10.3%-28.7% and 10.7%-29.0% respectively relative to normal seawater at the stations which have chemistry anomalies, moreover temperature and chemistry anomalies are at the same layer. The depletion of magnesium in the plume may be caused by a fluid lacking of magnesium which rises after the hydrothermal fluid reaches the equilibrium with ambient seawater, the enrichment of chlorine and bromine might be the result of inputting later brine which is generated by phase separation due to hydrothermal activity. In addition, the Br/CI ratio in the abnormal layers at the survey area is identical to that in seawater, which implies that halite dissolution (or precipitation) occurs neither when the fluid is vented nor when hydrothermal fluid entraining ambient seawater rises to form plume. From the abnormal instance at E55 station, it is very possible that there might exist a new hydrothermal vent site.
学科主题	Geosciences, Multidisciplinary
URL标识	查看原文
语种	英语
WOS记录号	WOS:000249394800016
公开日期	2010-12-24
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/5067]
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, 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	Wang XiaoYuan,Zeng ZhiGang,Liu ChangHua,et al. Geochemical anomalies of hydrothermal plume at EPR 13 degrees N[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2007,50(9):1433-1440.
APA	Wang XiaoYuan.,Zeng ZhiGang.,Liu ChangHua.,Yin XueBo.,Yu ShaoXiong.,...&Wang XiaoMei.(2007).Geochemical anomalies of hydrothermal plume at EPR 13 degrees N.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,50(9),1433-1440.
MLA	Wang XiaoYuan,et al."Geochemical anomalies of hydrothermal plume at EPR 13 degrees N".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 50.9(2007):1433-1440.