Coseismic changes in the chemical composition of volcanic gases from the Owakudani geothermal area on Hakone volcano, Japan

Coseismic changes in the chemical composition of volcanic gases from the Owakudani geothermal area on Hakone volcano, Japan
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日本箱根火山大涌谷地热区火山气体化学成分的同震变化

DOI:
10.1007/s00445-010-0445-9
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发表时间:
2011
影响因子:
3.5
通讯作者:
Yusuke Kakuage
Yusuke Kakuage
中科院分区:
地球科学3区
文献类型:
--
作者:
T. Ohba;Yasushi Daita;Takeshi Sawa;N. Taira;Yusuke Kakuage

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自2001年该地区发生地震群以来,对日本箱根火山大涌谷地热区钻孔和天然喷气孔中火山气体的化学和同位素组成进行了反复测量。2001年的CO2/H2O和CO2/H2S比率很高。它在2006年和2008年再次增加,当时地热区下方发生了地震群。所观察到的增加表明注入的CO2和SO2丰富的岩浆气体到下面的热液储层,这意味着岩浆气体是在2006年和2008年的热液系统的间歇性供应。震群的形成可能是由于封闭带破裂,气体从地壳浅部注入所致。
The chemical and isotopic compositions of volcanic gases at a borehole and a natural fumarole in the Owakudani geothermal area, Hakone volcano, Japan, have been repeatedly measured since 2001, when a seismic swarm occurred in the area. The CO2/H2O and CO2/H2S ratios were high in 2001. It increased in 2006 and again in 2008 when seismic swarms occurred beneath the geothermal area. The observed increases suggest the injection of CO2- and SO2-rich magmatic gas into the underlying hydrothermal reservoir, implying that the magmatic gas was episodically supplied to the hydrothermal system in 2006 and 2008. The earthquake swarms probably resulted from the injection of gas through the shallow crust accompanying the break of the sealing zone.
DOI: --
发表时间: 2008
期刊:
影响因子: --
作者:
上野俊吉;中嶋英雄;福田 功一郎;村上 英興;上野俊吉;福田 功一郎;橋本 忍;上野俊吉・中嶋英雄;H. Murakami;武田 はやみ;上野俊吉・林礼明・中嶋英雄
通讯作者: 上野俊吉・林礼明・中嶋英雄