Building a picture of magmatic-hydrothermal systems from rock and mush fragments brought to surface by silicic eruptions

利用硅质喷发带到地表的岩石和糊状碎片构建岩浆热液系统图

• 批准号: 2890928
• 金额: --
• 依托单位: University of Bristol
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2890928
• 关键词: Building; picture; magmatic; hydrothermal; systems

Understanding the distributions of silicate melts and aqueous fluids in magmatic systems is important for monitoring volcanoes and geothermal resources. In the build- up to a silicic eruption, magma may accumulate in a shallow chamber, but there can be even more melt and exsolved fluids stored in dominantly crystalline 'mushes'. Indeed, mature magmatic systems can be 'transcrustal' with melt and fluids heterogeneously distributed in space and time over a large range of depths. Geophysical data (e.g. seismic, electrical resistivity) provide major constraints on the geometry of magmatic systems but the inversions for melt and fluid distributions can be non-unique and have coarse resolution. Petrology provides complementary data on the generation and storage (e.g. pressure and temperature) conditions of magmas that erupted, and even timescales of processes preceding eruption from chemical profiles in crystals. This study will build on case studies with substantial geophysics and magma petrology datasets.

了解岩浆系统中硅酸盐熔体和含水流体的分布对于监测火山和地热资源非常重要。在硅质喷发的过程中，岩浆可能会积聚在浅室中，但可能会有更多的熔化和溶解的流体储存在主要是结晶的“糊状物”中。事实上，成熟的岩浆系统可以“穿地壳”，熔体和流体在大范围的深度上在空间和时间上不均匀地分布。地球物理数据（例如地震、电阻率）对岩浆系统的几何形状提供了主要约束，但熔体和流体分布的反演可能不是唯一的并且具有粗分辨率。岩石学提供了有关喷发岩浆的生成和储存（例如压力和温度）条件的补充数据，甚至根据晶体中的化学剖面提供了喷发前过程的时间尺度。这项研究将以大量地球物理学和岩浆岩石学数据集的案例研究为基础。