The chemical and isotopic compositions of gas discharge from shallow-water hydrothermal vents at Kueishantao, offshore northeast Taiwan
Chen, Xue-Gang1; Zhang, Hai-Yan2; Li, Xiaohu3; Chen, Chen-Tung Arthur4; Yang, Tsanyao Frank5; Ye, Ying1
2016
发表期刊GEOCHEMICAL JOURNAL
卷号50期号:4页码:341-355
摘要The chemical and isotopic compositions of gases discharging from shallow-water hydrothermal vents at Kueishantao (KST, northeast Taiwan) have been studied since 2000. In this paper, we present new data gathered from 2010 to 2014. The main component is CO2 (162-882 mmol/mol), followed by N-2 (33-634 mmol/mol), CH4 (18-190 mmol/mol), and H2S (b.d.l.-172 mmol/mol). Helium isotope values indicate that more than 70% of the helium is mantle-derived. O-2 was mostly a contaminant from ambient seawater during sampling, or from air after sampling. By subtracting the contaminant fractions of N-2 and Ar, using the O-2 concentrations plus the N-2/O-2 or Ar/O-2 ratios in air, the residual N2 and Ar were positively correlated to a significant extent, and exhibited N-2/Ar ratios close to air values. These corrected fractions of N-2 and Ar were derived from seawater percolated during the discharge stage. The delta C-13 values of CO2 ranged from -8.2 to -5.5% (VPDB), whereas the CO2 contents were largely controlled by its dissolution in the fluid phase. The estimated endmember contributions for CO2 were: mantle (8-32%), sediment (14-27%), and marine limestone (54-72%). CH4 was the main hydrocarbon in the KST gases, and exhibited a linear relationships with helium. The CH4/He-3 ratios increased dramatically from 0.1-20 x 10(6) during 2000 and 2003 to 3-5 x 10(8) after 2010, either due to the increasing CH4 contents or the decreasing input of magmatic helium. In the C-1/C2+ ratios versus delta C-13(CH4) (-26.8 to -24.5 parts per thousand) diagram, the KST gas samples lie at the boundary between thermogenic and abiotic, suggesting that CH4 may be derived from these two sources. Alternatively, according to the log(C-2/C-3) versus log(C-1/C-2) diagram and the C-1-C-5 distribution patterns, the C2+ hydrocarbons and less than 2% of the CH4 may have originated from either a kinetically-controlled Fischer Tropsch-Type (FTT) reaction or a thermogenic process, whereas more than 98% of CH4 was in equilibrium with CO2. In addition, the linear-logC(2)-C-5 patterns suggest that no significant secondary processes have occurred. This is the first study of KST gases to include carbon stable isotope ratio measurements, which provides important information about gases released from a shallow-water submarine hydrothermal field at a subduction zone.
文章类型Article
关键词Hydrothermal Vent Stable Carbon Isotope Kueishantao Thermogenic Hydrocarbons Abiotic Methane Fischer-tropsch-type (Ftt) Reaction
WOS标题词Science & Technology ; Physical Sciences
DOI10.2343/geochemj.2.0425
URL查看原文
收录类别SCI
语种英语
关键词[WOS]DE-FUCA-RIDGE ; MOLECULAR-WEIGHT HYDROCARBONS ; PANAREA AEOLIAN ISLANDS ; BACK-ARC BASIN ; FLUID GEOCHEMISTRY ; MARINE-ENVIRONMENT ; GASEOUS EMISSIONS ; ABIOTIC SYNTHESIS ; ORGANIC-COMPOUNDS ; GUAYMAS BASIN
WOS类目Geochemistry & Geophysics
WOS记录号WOS:000383258100005
引用统计
被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
版本预印本
条目标识符http://ir.idsse.ac.cn/handle/183446/1577
专题深海科学研究部_深海极端环境模拟研究实验室
作者单位1.Zhejiang Univ, Ocean Coll, Zhoushan 316021, Peoples R China
2.Chinese Acad Sci, Sanya Inst Deep Sea Sci & Engn, Lab Expt Study Deep Sea Extreme Condit, Sanya 572000, Peoples R China
3.State Ocean Adm, Key Lab Submarine Geosci, Hangzhou 310012, Zhejiang, Peoples R China
4.Natl Sun Yat Sen Univ, Dept Oceanog, Kaohsiung 804, Taiwan
5.Natl Taiwan Univ, Dept Geosci, Taipei 106, Taiwan
推荐引用方式
GB/T 7714
Chen, Xue-Gang,Zhang, Hai-Yan,Li, Xiaohu,et al. The chemical and isotopic compositions of gas discharge from shallow-water hydrothermal vents at Kueishantao, offshore northeast Taiwan[J]. GEOCHEMICAL JOURNAL,2016,50(4):341-355.
APA Chen, Xue-Gang,Zhang, Hai-Yan,Li, Xiaohu,Chen, Chen-Tung Arthur,Yang, Tsanyao Frank,&Ye, Ying.(2016).The chemical and isotopic compositions of gas discharge from shallow-water hydrothermal vents at Kueishantao, offshore northeast Taiwan.GEOCHEMICAL JOURNAL,50(4),341-355.
MLA Chen, Xue-Gang,et al."The chemical and isotopic compositions of gas discharge from shallow-water hydrothermal vents at Kueishantao, offshore northeast Taiwan".GEOCHEMICAL JOURNAL 50.4(2016):341-355.
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
The chemical and iso(861KB)期刊论文作者接受稿开放获取CC BY-NC-SA请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Chen, Xue-Gang]的文章
[Zhang, Hai-Yan]的文章
[Li, Xiaohu]的文章
百度学术
百度学术中相似的文章
[Chen, Xue-Gang]的文章
[Zhang, Hai-Yan]的文章
[Li, Xiaohu]的文章
必应学术
必应学术中相似的文章
[Chen, Xue-Gang]的文章
[Zhang, Hai-Yan]的文章
[Li, Xiaohu]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。