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融化和水性流体的分布对于监测火山和地热资源很重要。在硅质喷发之前，岩浆可能会在浅室内积聚，但是在主要结晶的“糊状”中，可能会有更多的熔体和溶解的液体。实际上，成熟的岩浆系统可以是“经跨壳”，而熔体和流体在各个深度范围内分布在空间和时间上。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限制，但是熔体和流体分布的反转可能是非唯一的，并且具有粗分辨率。岩石学提供了有关爆发的岩浆的产生和存储（例如压力和温度）条件的互补数据，甚至是晶体中化学轮廓发射之前的过程的时间表。这项研究将基于具有大量地球物理和岩浆岩石学数据集的案例研究。