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首页> 外文期刊>Journal of Volcanology and Geothermal Research >Origin and quantification of diffuse CO_2 and H_2S emissions at Crater Hills, Yellowstone National Park
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Origin and quantification of diffuse CO_2 and H_2S emissions at Crater Hills, Yellowstone National Park

机译：弥漫性CO_2和H_2S排放在火山口丘陵，黄石国家公园的原产地和定量

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We characterized volatile emissions based upon diffuse soil degassing measurements and fumarolic gas chemistry at Crater Hills, a thermally-altered area adjoining the Sour Creek resurgent dome that is located within the Yellowstone Caldera. The objective of this study was to investigate the source and flux of CO2 and H2S gases to improve our understanding of both the total emissions and origin of the spatial distribution. The total emission of CO2 estimated using the sequential Gaussian simulation method (sGs) was 66 to 109 t day(-1) with 95% confidence, which is an underestimation due to the: (1) inability to measure a high flux area on a steep slope, and (2) absence of measurements from fumarole and hot pool emissions. Based on gas chemistry data obtained for a fumarole at Crater Hills in 2007, the proportion of CO2 calculated to be derived from magma would be at least 38%, but could be as high as 50%. The spatial distribution of prominent geothermal features with the highest gas flux are broadly consistent with the regional fault pattern and, therefore, likely reflect the pattern of blind faults and/or fractures covered by overlying alluvium. The estimated emission of H2S was 0.39 t day(-1), based on the linear correlation between H2S and CO2. The heat output was also estimated to be similar to 35 MW with an average heat flux of similar to 100 W m(-2) based upon CO2-H2O-heat relations. (C) 2019 Elsevier B.V. All rights reserved.
机译：我们在火山口小山的弥漫性土壤脱气测量和富马摩洛瓦斯化学的基础上表现出挥发性排放，这是一个热改变的区域，其位于黄石火山口内的酸溪复苏圆顶。本研究的目的是研究CO2和H2S气体的来源和通量，以改善我们对空间分布的总排放和起源的理解。使用顺序高斯模拟方法（SGS）估计的CO2的总排放量为66至109 T日（-1），置信度为95％，由于以下：（1）无法测量a上的高通量区域，这是低估的陡坡，（2）没有测量尺度和热水池排放。基于2007年火山口小山的富马测压的气体化学数据，计算为岩浆的CO2的比例为至少38％，但可以高达50％。具有最高气体通量的突出地热特征的空间分布与区域故障模式广泛一致，因此可能反映了覆盖覆盖覆盖的盲故障和/或骨折的模式。基于H 2 S和CO 2之间的线性相关性，H 2 S的估计发射为0.39t天（-1）。还估计热输出与35mW相似，其平均热通量与基于CO 2-H20-热关系类似于100W m（-2）。 （c）2019 Elsevier B.v.保留所有权利。

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