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首页> 外文期刊>Journal of Volcanology and Geothermal Research >Water geochemistry and soil gas survey at Ungaran geothermal field, central Java, Indonesia
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Water geochemistry and soil gas survey at Ungaran geothermal field, central Java, Indonesia

机译：印度尼西亚中爪哇省Ungaran地热田的水地球化学和土壤气体调查

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摘要

A soil gas survey for radon (Rn), thoron (Tn), CO_2, and mercury (Hg), and the chemical analysis of hot spring waters, were undertaken in the Ungaran geothermal field, Central Java, Indonesia. The results of soil gas surveys indicate fault systems trending NNE-SSW and WNW-ESE. Particularly high CO_2 concentrations (> 20%), and high Hg concentrations were detected in vicinity of the fumaroles. Emanometries of Rn, Tn and C0_2 also conclusively identified the presence of a fracture zone for the migration of geothermal fluid. The Hg results infer that the up-flow zone of high temperature geothermal fluids maybe located in the north of fumaroles in the Gedongsongo area (near the collapse wall). Chemistry of thermal springs in the up-flow zone are acid (pH=4) and show a Ca-Mg-SO_4 composition. The thermal waters are mainly Ca-Mg-HCO_3 and Ca-(Na)-S0_4-HCO_3 types near the fumarolic area and are mixed Na-(Ca)-Cl-(HCO_3) waters in the south east of Gedongsongo. The δ~(18)O (between - 5.3 and - 8.2%o) and δ (between - 39 and - 52%o) indicate that the waters are essentially meteoric in origin. A conceptual hydro-geochemical model of the Gedongsongo thermal waters based on the soil gas, isotope and chemical analytical results, was constructed.
机译：在印度尼西亚中爪哇省的Ungaran地热田进行了ra气（Rn），（Tn），CO_2和汞（Hg）的土壤气调查以及温泉水的化学分析。土壤气体调查的结果表明，断裂系统趋向于NNE-SSW和WNW-ESE。在喷气孔附近检测到特别高的CO_2浓度（> 20％）和高Hg浓度。 Rn，Tn和C0_2的热电学特征也最终确定了地热流体迁移的断裂带的存在。汞的结果表明，高温地热流体的上流带可能位于Gedongsongo地区（靠近塌陷墙）的喷气孔的北部。上流区的温泉化学性质是酸（pH = 4），并显示出Ca-Mg-SO_4组成。富马地区附近的热水主要为Ca-Mg-HCO_3和Ca-（Na）-SO_4-HCO_3类型，且在Gedongsongo的东南部为混合的Na-（Ca）-Cl-（HCO_3）水。 δ〜（18）O（在-5.3和-8.2％o之间）和δ（在-39和-52％o之间）表明水的起源基本上是流星的。基于土壤气体，同位素和化学分析结果，建立了Gedongsongo温泉水的概念性水文地球化学模型。

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  • 来源
    《Journal of Volcanology and Geothermal Research》 |2012年第1期|p.23-33|共11页
  • 作者

    Nguyen Kim Phuong; Agung Harijoko; Ryuichi Itoi; Yamashiro Unoki;

  • 作者单位

    Department of Earth Resource Engineering, Faculty of Engineering, Kyushu University, 744 Motooka, Nishiku, Fukuoka 819-0395, Japan,Department of GeoEnvironment, Faculty of Geology and Petroleum Engineering, Ho Chi Minh City University of Technology, 268 Ly Thuong Kiet street, Ward 14, District 10,Ho Chi Minh City, Viet Nam;

    Department of Geological Engineering, Faculty of Engineering, Gadjah Mada University, JL. Grafika 2, Yogyakarta (55281), Indonesia;

    Department of Earth Resource Engineering, Faculty of Engineering, Kyushu University, 744 Motooka, Nishiku, Fukuoka 819-0395, Japan;

    Department of Earth Resource Engineering, Faculty of Engineering, Kyushu University, 744 Motooka, Nishiku, Fukuoka 819-0395, Japan;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    soil gas; water geochemistry; ungaran geothermal field; indonesia;

    机译：土气水地球化学Ungaran地热田;印度尼西亚;

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