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.

该项目将利用通过同步加速器 X 射线光电子显微镜 (X-PEEM) 进行古地磁分析的新方法，为 Eagle Station (ES) 和未分组的 pallasites 寻找和测量金属纳米结构的存在和磁性强度，以深入了解其母体的古代磁场形成的条件。补充电子微探针分析将用于限制其金属相的化学演化，并深入了解与其他经过深入研究的陨石群的潜在地球化学和遗传关系。这些方法将共同提供对仍在争论中的石铁橄榄石类陨石形成机制所涉及的行星过程的进一步见解，包括岩石成因的铁火山作用模型：提出的 16 号普赛克小行星的起源模型，该小行星是NASA 最近一次任务于 2023 年 10 月 13 日发射。最初认为 16 Psyche 是一个剥离的行星核心，但新的密度测量结果显示，其密度低于岩浆密度铁，表明灾难性撞击后松散固结形成的大孔结构，或者 16 Psyche 在成分上更接近石铁体。