Satellite‐based evidence for a large hydrothermal system at Piton de la Fournaise volcano (Reunion Island)
Satellite‐based evidence for a large hydrothermal system at Piton de la Fournaise volcano (Reunion Island)
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基于卫星的证据表明富尔奈斯火山（留尼汪岛）存在大型热液系统
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
D. Coppola
中科院分区：
文献类型：
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作者：
M. Gouhier;D. Coppola
热液系统是存在于许多火山中的活跃构造。它们的特征是必不可少的，因为它们揭示了岩浆源的演化，并可能在喷发风格中起作用。许多研究已经表明，在Piton de la Fournaise火山（la r<s:1> union）的山顶火山口下存在一个浅层热液系统，尽管仍然没有明确的证据。在这里，我们根据2007年4月火山喷发期间获得的卫星数据提出了新的论点，这些数据表明，在Piton de la Fournaise的Dolomieu火山口下存在一个大型热液系统。据估计，在Dolomieu火山口崩塌阶段（4月6日至13日）释放的SO2为935±244千吨，而从熔岩流出率计算的喷发SO2明显不足（179±89千吨）。我们认为过量的SO2来自于崩塌时突然打开的大型热液系统。
Hydrothermal systems are active structures present at many volcanoes. Their characterization is essential as they reveal the evolution of the magmatic source and may play a role in the eruptive style. Many studies have already suggested the existence of a shallow hydrothermal system beneath the summit craters at Piton de la Fournaise volcano (La Réunion), although there is still no clear evidence. Here we present new arguments on the basis of satellite‐based data acquired during April 2007 eruption suggesting the existence of a large hydrothermal system beneath the Dolomieu crater at Piton de la Fournaise. SO2 released during the collapse phase of the Dolomieu crater (∼April 6–13) has been estimated at 935 ± 244 kilotons whereas erupted SO2 calculated from lava effusion rates was found to be clearly insufficient (179 ± 89 kilotons). We suggest that the excess of SO2 originated from a large hydrothermal system suddenly opened by the collapse.