Influence of regional tectonics on the genesis and extrusion of volcanic rocks in orogenic belts

这项研究将调查为什么现代和古代火山都位于断层上，以及岩浆流过断层时的成分是如何变化的，这为岩浆流过地壳提供了途径。该项目的第一部分使用爱琴海火山中心在过去2500万年来分析岩浆演化的可变性：选择该地区是因为地幔中单个岩浆源上方的断层样式发生了快速变化。此外，从以前的工作中，我们已经很好地了解了熔岩的年代学和地球化学。工作的第二部分试图将地幔地震层析成像的新发现与大规模的火山活动模式联系起来。在第三部分中，这项工作的结果将应用于古老的阿巴拉契亚山脉带中更加困难的岩石，以了解古老的火山是如何形成的，反过来说，它们形成时的断层模式是什么。这项研究的目的是将地球上两个最重要的地质过程联系起来：火山作用和断层作用。它在多种矿产资源的勘探和火山危险性评价中具有实际应用价值。

This study will investigate why modern and ancient volcanoes are located along faults and how the composition of magma is changed as it flows through the faults, which provide pathways for magma to flow through the Earth's crust. Part 1 of the project uses the volcanic centres of the Aegean Sea over the past 25 million years to analyse the variability of magma evolution: this region is chosen because of the rapid changes in style of faulting that have taken place above individual magma sources in the mantle. Furthermore, chronology and geochemistry of the lavas are well understood from previous work. Part 2 of the work attempts to relate new findings from seismic tomography of the mantle to large-scale patterns of volcanism. Results from this work are then applied in Part 3 to the much more difficult rocks of the old Appalachian mountain belt, to understand how old volcanoes formed and conversely what were the patterns of faulting at the time that they formed. This research aims to relate two of the most important geological processes on the planet: volcanism and faulting. It has practical applications to the exploration for many mineral resources and to the assessment of volcanic risk.