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首页> 外文期刊>Marine Chemistry >Boron isotope compositions of fluids and plumes from the Kueishantao hydrothermal field off northeastern Taiwan: Implications for fluid origin and hydrothermal processes
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Boron isotope compositions of fluids and plumes from the Kueishantao hydrothermal field off northeastern Taiwan: Implications for fluid origin and hydrothermal processes

机译：台湾东北部奎山套热液田流体和羽流的硼同位素组成：对流体成因和热液过程的启示

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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 δ~(11)B value of ambient seawater near the field is 40.05 ± 0.01‰, and the boron concentration is 3.81 mg/L. Andesite rocks from the hydrothermal field have an average boron content of 15.3 ppm. The hydrothermal fluids from the yellow spring and white spring span a small range of δ~(11)B values, from 33.27 ± 0.22 to 36.84 ± 0.11‰, and plumes from both springs also cover a small range, from 37.56 ± 0.01 to 40.37 ± 021‰. 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 δ~(11)B values (33.27-36.84‰) that are lower than those of the hydrothermal plumes (3.94-4.17 mg/L, 37.56-4037‰). Hydrothermal fluids and plumes display a very regular array of data points in a δ~(11)B-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 δ~(11)B/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 δ~(11)B 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 105 mol/yr and 132 × 10~5 mol/yr, and from the white spring it is between 6.69 × 10~4 mol/yr and 7.17 × 10~4 mol/yr, assuming that only andesites are present in the reaction zone.
机译：硼是海底热液场排放流体中的常见元素，已被用于了解热液系统中的热流通量和水-岩相互作用。我们测量了奎山套热液场中海水，安山岩，热液和烟羽中的硼浓度和同位素组成。田间环境海水的δ〜（11）B值为40.05±0.01‰，硼浓度为3.81mg / L。来自热液场的安山岩岩石的平均硼含量为15.3 ppm。黄泉和白泉的热液流体的δ〜（11）B值范围较小，从33.27±0.22至36.84±0.11‰，两个弹簧的羽流也覆盖较小的范围，从37.56±0.01至40.37。 ±021‰。奎山套热液场中两个泉水的热液相对于海水的变量B富集度在7％至21％之间。它们的B浓度（4.10-4.64 mg / L）稍高于热液烟羽（3.94-4.17 mg / L，37.56-4037）的δ〜（11）B值（33.27-36.84‰）。 ‰）。热液和羽状流在δ〜（11）B-B图中显示出非常规则的数据点阵列，这表明热液和羽状流中的硼主要来自海水，很少来自安山岩。这表明在奎山套热液田海底流体与山铁矿的相互作用持续时间很短。在从春季到热液羽流的所有流体中，pH值，B浓度和B同位素组成之间都显示出显着的相关性，这表明热液羽流的δ〜（11）B / B和pH / B比在整个过程中都具有稳定的值。排气孔至烟羽的距离较小（<15 m）。因此，热液羽流中的B浓度和B同位素组成可用于描述控制海水环境中热液羽流的化学组成的扩散过程。基于B浓度和δ〜（11）B值的水/岩石比在1.96和3.63之间。硼从黄色泉水到海洋的水热通量在1.17 x 105 mol / yr和132×10〜5 mol / yr之间，而从白色泉水到硼的水热通量在6.69×10〜4 mol / yr和7.17×10之间假设反应区中仅存在安山岩，约为〜4 mol / yr。

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  • 来源
    《Marine Chemistry》 |2013年第20期|59-66|共8页
  • 作者

    Zhigang Zeng; Xiaoyuan Wang; Chen-Tung A. Chen; Xuebo Yin; Shuai Chen; Yunqi Ma; Yingkai Xiao;

  • 作者单位

    Seafloor Hydrothermal Activity Laboratory of the Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, China;

    Seafloor Hydrothermal Activity Laboratory of the Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;

    Institute of Marine Geology and Chemistry, National Sun Yat-Sen University, Kaohsiung 804, Taiwan, ROC;

    Seafloor Hydrothermal Activity Laboratory of the Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;

    Seafloor Hydrothermal Activity Laboratory of the Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;

    Qinghai Provincial Key Laboratory for Geology and Environment of Salt Lakes, Ojnghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China;

    Qinghai Provincial Key Laboratory for Geology and Environment of Salt Lakes, Ojnghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Boron; Hydrothermal fluid and plume; Kueishantao hydrothermal field;

    机译：硼;热液和羽状流;奎山tao热液田;

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