Geochemical Changes in Spring Water Associated with the 2000 Eruption of the Miyakejima Volcano, Japan
Geochemical Changes in Spring Water Associated with the 2000 Eruption of the Miyakejima Volcano, Japan
复制标题
与 2000 年日本三宅岛火山喷发相关的泉水地球化学变化
DOI：
10.1007/s00024-006-0042-1
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发表时间：
2006
影响因子：
2
通讯作者：
Taro Nakamura
中科院分区：
文献类型：
--
作者：
Tsutomu Sato;I. Machida;Makoto Takahashi;Taro Nakamura
2000年火山喷发后，日本宫岛岛的八个泉水和一个湖泊的水被采集。分析了水的主要化学成分和同位素组成。在喷射物厚度超过32 mm的几个泉水中，硫酸盐离子显著增加。泉水与渗滤液中氯/S的摩尔比关系良好。喷发后，随着时间的推移，泉水的硫同位素组成与喷发出来的渗滤液的硫同位素组成趋于接近。因此，喷发后泉水中添加的硫酸盐离子的来源被解释为硬石膏和喷射物中附着的硫。
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.