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首页> 外文期刊>Earth and Planetary Science Letters: A Letter Journal Devoted to the Development in Time of the Earth and Planetary System >The memory of volcanic waters: Shallow magma degassing revealed by halogen monitoring in thermal springs of La Soufriere volcano (Guadeloupe, Lesser Antilles)
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The memory of volcanic waters: Shallow magma degassing revealed by halogen monitoring in thermal springs of La Soufriere volcano (Guadeloupe, Lesser Antilles)

机译：火山水的记忆：La Soufriere火山（瓜德罗普岛，安的列斯群岛）的温泉中的卤素监测显示出浅层岩浆脱气

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The halogen contents of thermal waters collected since 1979 at La Soufriere volcano (Guadeloupe, Lesser Antilles) are interpreted as a retarded record of magma degassing pulses dispersed into the hydrothermal system. The further the spring is located from the source, the larger the time delay and the older the event recorded in water chemistry. Using advection-dispersion transport models in porous media, we reconstruct the time-series of degassing pulses for the period 1971-1992 and show that it correlates with the seismic records. The 1975-1977 sismo-volcanic crisis at La Soufriere is thereby interpreted as the result of a magma intrusion at shallow depth (similar to 3 km) which likely began in approximately 1973 and degassed in a pulsatory regime during similar to 15 yr. The recent recrudescence of fumarolic and seismic activity could represent the initial stage of new magma injection. Measurement of halogen contents in hydrothermal waters collected around active volcanoes may provide a powerful tool for detection of the initial stages of magma intrusions. (c) 2005 Elsevier B.V All rights reserved.
机译：自1979年以来在La Soufriere火山（瓜德罗普岛，小安的列斯）收集的热水中的卤素含量被解释为分散到热液系统中的岩浆脱气脉冲的延迟记录。弹簧离水源越远，时间延迟越大，水化学中记录的事件就越早。使用多孔介质中的对流扩散输运模型，我们重建了1971-1992年期间脱气脉冲的时间序列，并表明它与地震记录相关。因此，La Soufriere发生1975-1977年的火山爆发危机是岩浆侵入浅层深度（约3 km）的结果，这可能始于1973年左右，并且在脉动状态下在约15年的时间里脱气。近期的火山岩活动和地震活动再次出现可能代表了新的岩浆注入的初始阶段。测量活火山周围的热水中的卤素含量可以为检测岩浆侵入的初始阶段提供强大的工具。 （c）2005 Elsevier B.V保留所有权利。

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