From plume source to hotspot: quantifying mixing in mantle plumes and its implications for the nature of deep-mantle heterogeneity.

地幔热柱是一种浮力上升流，将热物质从地球深部带到地表，形成火山热点，如夏威夷。尽管进行了广泛的研究，但到目前为止，在热点熔岩中记录的地球化学变化很难理解，特别是它们与其不均匀的深地幔来源的关系。该项目旨在使用最先进的地球动力学模型来确定深部地幔非均质性如何输送到热柱中，以及在热柱上升期间这种非均质性是如何混合的。这将有助于在类似地球的流体动力框架下，首次将火山热点的地球化学变化与深部地幔的热化学结构联系起来。

Mantle plumes are buoyant upwellings that bring hot material from Earth's deep-mantle to the surface, forming volcanic hotspots, like Hawaii. Although extensively studied, the geochemical variations recorded in hotspot lavas have, so far, proved difficult to understand, particularly how they relate to their heterogeneous deep-mantle source. This project aims to use state-of-the-art geodynamical models to determine how deep-mantle heterogeneities are transported into a plume and how such heterogeneities are mixed during plume ascent. This will facilitate the linking, for the first time, of geochemical variations at volcanic hotspots to the deep-mantle's thermo-chemical structure, under an Earth-like, fluid-dynamical framework.