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首页> 外文期刊>Pure and Applied Geophysics >Geochemical changes in spring water associated with the 2000 eruption of the Miyakejima volcano, Japan
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Geochemical changes in spring water associated with the 2000 eruption of the Miyakejima volcano, Japan

机译：与2000年日本三宅岛火山喷发有关的泉水地球化学变化

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摘要

Water was sampled from eight springs and a lake in volcanic Miyakejima Island of Japan after the 2000 eruption. Major chemical and isotopic compositions of the water were analyzed. Significant increases of sulfate ion are observed in several springs where the thickness of ejecta exceeds 32 mm. A good relationship of Cl/S mole ratios between spring water and leachate of the ejecta is observed. Sulfur isotopic compositions of the spring water become close to that of leachate of the ejecta as time elapses after the eruption. Consequently the sources of the added sulfate ion in the spring water after the eruption are interpreted to be anhydrite and adhered sulfur of the ejecta.
机译：2000年喷发后，从日本三宅岛的八个温泉和一个湖泊中抽取了水。分析了水的主要化学和同位素组成。在几个弹簧中，喷出物的厚度超过32毫米时，观察到硫酸根离子显着增加。观察到泉水和喷出物沥出液之间Cl / S摩尔比的良好关系。随着喷发时间的流逝，泉水中的硫同位素组成变得接近喷出物的渗滤液。因此，喷发后泉水中添加的硫酸根离子的来源被解释为喷射的硬石膏和附着的硫。

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