Boron isotope compositions of fluids and plumes from the Kueishantao hydrothermal field off northeastern Taiwan: Implications for fluid origin and hydrothermal processes

ISL OpenIR > 青海盐湖研究所知识仓储

	Boron isotope compositions of fluids and plumes from the Kueishantao hydrothermal field off northeastern Taiwan: Implications for fluid origin and hydrothermal processes
	Zeng, Zhigang 1; Wang, Xiaoyuan 1; Chen, Chen-Tung A.2; Yin, Xuebo 1; Chen, Shuai 1; Ma, Yunqi 3; Xiao, Yingkai 3
	2013-12-20
发表期刊	MARINE CHEMISTRY
卷号	157 页码:59-66
关键词	Boron Hydrothermal Fluid And Plume Kueishantao Hydrothermal Field
摘要	Boron is a common element in vent fluids of seafloor hydrothermal fields, and it has been used to understand the hydrothermal flux and water-rock interaction in hydrothermal systems. We have measured the boron concentration and isotope composition of seawater, andesite, hydrothermal fluid and plume samples from the Kueishantao hydrothermal field. The delta B-11 value of ambient seawater near the field is 40.05 +/- 0.01 parts per thousand, and the boron concentration is 3.81 mg/L Andesite rocks from the hydrothermal field have an average boron content of 153 ppm. The hydrothermal fluids from the yellow spring and white spring span a small range of delta B-11 values, from 3327 +/- 022 to 36.84 +/- 0.11 parts per thousand, and plumes from both springs also cover a small range, from 37.56 +/- 0.01 to 40.37 +/- 0.21 parts per thousand. Hydrothermal fluids from both springs in the Kueishantao hydrothermal field have variable B enrichments relative to seawater between 7 and 21%. They have B concentrations (4.10-4.64 mg/L) that are slightly higher and delta B-11 values (3327-36.84 parts per thousand) that are lower than those of the hydrothermal plumes (3.94-4.17 mg/L, 37.56-40.37 parts per thousand). Hydrothermal fluids and plumes display a very regular array of data points in a delta B-11-B diagram, suggesting that the boron of hydrothermal fluids and plumes is mainly from seawater and that little of it is, from andesite. This implies that the interaction of subseafloor fluid and -andesite at the Kueishantao hydrothermal field is of short duration. In all the fluids, from springs to hydrothermal plumes, the pH values, B concentrations and B isotopic compositions show significant correlations with each other suggesting that the delta B-11/B and pH/B ratios of hydrothermal plumes have stable values over the small distance form vent to plume (<15 m). Thus the B concentrations and B isotopic compositions of hydrothermal plumes can be used to describe the diffusive processes governing the chemical compositions of hydrothermal plumes in the seawater environment. The water/rock ratios, based on the B concentrations and delta B-11 values, are between 1.96 and 3.63. The hydrothermal flux of boron from the yellow spring into the oceans is between 1.17 x 10(5) mol/yr and 132 x 10(5) mol/yr, and from the white spring it is between 6.69 x 10(4) mol/yr and 7.17 x 10(4) mol/yr, assuming that only andesites are present in the reaction zone. (C) 2013 Elsevier B.V. All rights reserved.
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/4418
专题	青海盐湖研究所知识仓储中国科学院青海盐湖研究所
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.Natl Sun Yat Sen Univ, Inst Marine Geol & Chem, Kaohsiung 804, Taiwan 3.Chinese Acad Sci, Qinghai Inst Salt Lakes, Qinghai Prov Key Lab Geol & Environm Salt Lakes, Xining 810008, Peoples R China
推荐引用方式 GB/T 7714	Zeng, Zhigang,Wang, Xiaoyuan,Chen, Chen-Tung A.,et al. Boron isotope compositions of fluids and plumes from the Kueishantao hydrothermal field off northeastern Taiwan: Implications for fluid origin and hydrothermal processes[J]. MARINE CHEMISTRY,2013,157:59-66.
APA	Zeng, Zhigang.,Wang, Xiaoyuan.,Chen, Chen-Tung A..,Yin, Xuebo.,Chen, Shuai.,...&Xiao, Yingkai.(2013).Boron isotope compositions of fluids and plumes from the Kueishantao hydrothermal field off northeastern Taiwan: Implications for fluid origin and hydrothermal processes.MARINE CHEMISTRY,157,59-66.
MLA	Zeng, Zhigang,et al."Boron isotope compositions of fluids and plumes from the Kueishantao hydrothermal field off northeastern Taiwan: Implications for fluid origin and hydrothermal processes".MARINE CHEMISTRY 157(2013):59-66.