Investigating planetary processes using Eagle Station and Ungrouped pallasite meteorites

使用鹰站和未分组的橄榄石陨石研究行星过程

• 批准号: 2886878
• 金额: --
• 依托单位: University of Oxford
• 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-2886878
• 关键词: Investigating; planetary; processes; using; Eagle

This project will utilize novel methods of paleomagnetic analysis through synchrotron X-ray photoemission electron microscopy (X-PEEM) to search for, and measure, the presence and magnetic intensities of metallic nanostructures for Eagle Station (ES) and Ungrouped pallasites to gain insight on the conditions under which ancient magnetic fields of their parent bodies develop. Supplementary electron microprobe analysis will be utilized to constrain the chemical evolution of their metal phases and provide insight into potential geochemical and genetic relationships to other well studied meteorite groups. These methods will collectively provide further insight into the planetary processes involved in the, still debated, mechanisms of formation of the stony-iron pallasite class of meteorites including the ferrovolcanism model of petrogenesis: a proposed origin model of the 16 Psyche asteroid, the target of the most recent NASA mission launched on 13 October, 2023. Originally thought to be a stripped planetary core, new density measurements of 16 Psyche now read a lower density than magmatic iron, indicating either a macroporous structure from loose consolidation after catastrophic impact, or that 16 Psyche is closer to that of a stony-iron body in composition.

该项目将利用新的古磁学分析方法，通过同步加速器x射线光电发射电子显微镜（X-PEEM）来搜索和测量鹰站（ES）和Ungrouped pallasites的金属纳米结构的存在和磁场强度，以深入了解其母体古代磁场发展的条件。补充的电子探针分析将用于限制其金属相的化学演化，并提供对其他已被充分研究的陨石群的潜在地球化学和遗传关系的见解。这些方法将共同进一步深入了解石铁pallasite类陨石形成机制所涉及的行星过程，包括岩石成因的铁火山作用模型：普赛克16小行星的一个拟议起源模型，普赛克16小行星是2023年10月13日发射的最新NASA任务的目标。最初认为16 Psyche是一个被剥离的行星核心，现在对16 Psyche的新密度测量显示其密度低于岩浆铁，这表明要么是灾难性撞击后松散固化的大孔结构，要么是16 Psyche在成分上更接近于石铁体。