Investigation of the behaviour of iron metal during impact melting

撞击在改造行星表面方面起着重要作用。冲击熔融导致熔融的目标岩石在未熔融的岩石碎屑中就位，从而形成被描述为冲击熔融角砾岩的岩石。这些岩石通常由硅酸盐碎屑和硅酸盐为主的冲击熔体组成。然而，在陨石和月球收藏品中，也有许多铁金属碎屑被合并到撞击熔融角砾岩中。本项目是研究金属在各种材料中形成冲击熔融角砾岩过程中的行为，以了解短脉冲加热的化学和物理影响。重点将是了解在经历了冲击熔化的CB球粒陨石中形成部分熔融的金属织构的过程。这些将与月球样品(阿波罗样品和陨石)和撞击熔融的普通球粒陨石中的金属颗粒的观察结果进行比较。

Impacts play a major role in reworking planetary surfaces. Impact melting results in emplacement of molten target rock among unmelted rock clasts, resulting in rocks described as impact melt breccias. These rocks are typically composed of silicate clasts and a silicate-dominated impact melt. However, among the meteorite and lunar collections there are also many examples of iron metal clasts that are incorporated in impact melt breccias. This project is an investigation of the behaviour of metal during formation of impact melt breccias in a variety of materials, in order to understand the chemical and physical effects of short heating pulses. The focus will be on understanding the processes that have led to formation of partially molten metal textures in the CB chondrites, which have undergone impact melting. These will be compared with observations of metal grains in lunar samples (Apollo samples and meteorites) and impact-melted ordinary chondrites