On the geochemistry of volcanic gases and fluids from the Unzen volcano - ICDP-Unzen-Conduit-Drilling

在ICDP Unzen钻井项目的框架内，我们计划连续分析钻井泥浆中溶解的气相。云泉导管钻探从侧面开始，将火山的热液和岩浆流体系统封闭在一个连续的剖面上。实时气体分析将提供有关大气水的数量和渗透深度、深层地下水的对流过程以及与火山(岩浆)气体混合的动力学和强度的基本数据。因此，可以沿着钻井深度剖面直接量化气孔的内部连接和几何形状。通过计划的气体监测实验和随后的实验室同位素研究，我们的目的是解释脱气岩浆流体的组成和数量与火山的地震活动及其喷发行为之间存在多大程度的相关性。

Within the framework of the ICDP Unzen Drilling Project we plan to analyse, on a continuous basis, the gas phase dissolved in the drill mud. The Unzen-Conduit-Drilling which starts on a flank, encloses both the hydrothermal and magmatic fluid systems of the volcano in a continuous profile. Real-time gas analysis will provide essential data on the amount and penetration depth of meteoric water as well as on convection processes of deep ground water and the dynamics and intensity of the mixture with volcanic (magmatic) gases. The internal connections and geometry of the fumaroles can thus be quantified directly along the drilled depth profile. With the planned gas monitoring experiment and subsequent laboratory isotope studies we aim to explain in how far a correlation exists between the composition and amount of degassed magmatic fluids and the seismicity in the volcano as well as its eruptive behaviour.