The evolution of material in the inner solar system: Elucidating the history of enstatite chondrites

太阳系内部物质的演化：阐明顽辉石球粒陨石的历史

• 批准号: 2285741
• 金额: --
• 依托单位: The Open University
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2285741
• 关键词: evolution; material; inner; solar; system

The solar system formed from a disk of dust and gas, and this can be analysed using meteorites that date from this time. The student will undertake a detailed study of materials that date from this time and place - specifically the enstatite meteorites, which may have originated in the innermost part of the disk.Chondritic meteorites are relicts from the early solar system composed largely of sub-spherical um-to-mm sized objects called chondrules. Enstatite chondrites are isotopic twins to the Earth-Moon system, suggesting a genetic connection.In addition, recent orbital data from the MESSENGER mission to Mercury have shown that it has chemical similarities to the enstatite chondrites, for example high sulphur abundances and Mg/Si ratios.This rare meteorite group (only around 500 enstatite meteorites are known) are therefore highly likely to be products of the inner solar system; if not direct ancestors then possible 'aunts' to the terrestrial planets.The enstatite chondrites are remarkable for their extremely reduced mineralogy; sulphides and metal are very abundant and the main silicate is FeO-poor enstatite. Reduced C and N bearing minerals such as SiC, graphite and nierite (Si3N4) are relatively abundant. High temperature solids such as calcium aluminium-rich inclusions (CAIs) are rare.The student will analyse the chemistry and isotope systematics of individual, pristine, chondrules, CAIs and isolated sulphide grains from the most primitive available enstatite chondrites.

太阳系是由灰尘和气体盘形成的，可以使用此时起的陨石来分析这一点。该学生将对从这个时候和地点开始的材料进行详细研究 - 特别是启动磁盘的灭藻陨石。该材料可能起源于磁盘的最内向部分。基本陨石是早期太阳能系统的遗物，该太阳能系统主要由次球体um-to-mm量的对象组成，称为Chondrules。 Enstatite软骨是与地球系统系统的同位素双胞胎，表明是遗传连接的。此外，Messenger Missive的最新轨道数据表明，它与Enstatite软管具有化学相似之处 系统;如果不是直接的祖先，那么可能会“阿姨”到陆地行星。硫化物和金属非常丰富，主要硅酸盐是feo-poor enstatite。减少的C和N轴承矿物质，例如SIC，石墨和Nierite（Si3n4）相对丰富。高温固体（例如富含钙的富含钙的夹杂物（CAI））很少见。