Genesis of anhydrite in hydrothermally altered basalt from 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

	Genesis of anhydrite in hydrothermally altered basalt from the East Pacific Rise near 13 degrees N
	Chen, Shuai 1,2; Wang, Xiaoyuan 1; Yin, Xuebo 1; Zhang, Guoliang 1
刊名	ACTA OCEANOLOGICA SINICA
	2013-02-01
卷号	32 期号:2 页码:12-17
关键词	anhydrite hydrothermal alteration pillow basalt East Pacific Rise 13 degrees N
ISSN号	0253-505X
通讯作者	Chen, S
中文摘要	This study reports the occurrence of anhydrite in hydrothermally altered pillow basalt (12A degrees 50.55'N, 103A degrees 57.62'W, water depth 2 480 m), which may have been produced in the basalt during seawater-basalt interaction in the laboratory. The existence of anhydrite in the altered basalt indicates extensive high-temperature hydrothermal alteration at the surface of seafloor pillow basalt. Microprobe analysis shows significant chemical zoning in the hydrothermally altered pillow basalt, in which Ca, Si and Al contents decrease and P, Fe, Mn, Cr and S contents increase from fresh basalt to altered basalt. The negative correlation between Rb-Sr and Li-Sr, and negative correlation between Li-Ca and Rb-Ca in the high-temperature vent fluids show that these fluids underwent anhydrite precipitation before fluid jetting due to mixing with seawater in the sub-seafloor. Based on these observations, we show that not all Ca in the anhydrite comes from basalt in the reaction zone, and that the basalts on the seafloor or in the upflow zone may also provide Ca for anhydrite.
英文摘要	This study reports the occurrence of anhydrite in hydrothermally altered pillow basalt (12A degrees 50.55'N, 103A degrees 57.62'W, water depth 2 480 m), which may have been produced in the basalt during seawater-basalt interaction in the laboratory. The existence of anhydrite in the altered basalt indicates extensive high-temperature hydrothermal alteration at the surface of seafloor pillow basalt. Microprobe analysis shows significant chemical zoning in the hydrothermally altered pillow basalt, in which Ca, Si and Al contents decrease and P, Fe, Mn, Cr and S contents increase from fresh basalt to altered basalt. The negative correlation between Rb-Sr and Li-Sr, and negative correlation between Li-Ca and Rb-Ca in the high-temperature vent fluids show that these fluids underwent anhydrite precipitation before fluid jetting due to mixing with seawater in the sub-seafloor. Based on these observations, we show that not all Ca in the anhydrite comes from basalt in the reaction zone, and that the basalts on the seafloor or in the upflow zone may also provide Ca for anhydrite.
学科主题	Oceanography
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Oceanography
研究领域[WOS]	Oceanography
关键词[WOS]	MID-ATLANTIC RIDGE ; OCEANIC-CRUST ; SEAWATER INTERACTION ; CHEMICAL-EXCHANGE ; TRACE-ELEMENT ; HEAVY-METALS ; ODP SITE-801 ; VENT FLUIDS ; SEA-WATER ; 500 BARS
收录类别	SCI
原文出处	10.1007/s13131-013-0270-z
语种	英语
WOS记录号	WOS:000314699900002
公开日期	2014-07-17
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/16305]
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 Univ, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Chen, Shuai,Wang, Xiaoyuan,Yin, Xuebo,et al. Genesis of anhydrite in hydrothermally altered basalt from the East Pacific Rise near 13 degrees N[J]. ACTA OCEANOLOGICA SINICA,2013,32(2):12-17.
APA	Chen, Shuai,Wang, Xiaoyuan,Yin, Xuebo,&Zhang, Guoliang.(2013).Genesis of anhydrite in hydrothermally altered basalt from the East Pacific Rise near 13 degrees N.ACTA OCEANOLOGICA SINICA,32(2),12-17.
MLA	Chen, Shuai,et al."Genesis of anhydrite in hydrothermally altered basalt from the East Pacific Rise near 13 degrees N".ACTA OCEANOLOGICA SINICA 32.2(2013):12-17.