Experimental study using containerless laser melting of silicates with respect to understanding chondrule formation

使用无容器激光熔化硅酸盐来了解球粒形成的实验研究

• 批准号: 147336324
• 负责人: Professor Dr. Andreas Pack
• 金额: --
• 依托单位: Abteilung Isotopengeologie
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/147336324?language=en
• 关键词: Experimental; study; using; containerless; laser

Chondrules are 0.1 – 1 mm large igneous spherules. They are a major component of chondritic meteorites. Understanding the mechanism that formed chondrules in the early solar nebula remains one of the main challenges in meteoritics. We will conduct experiments using a containerless melting device to reproduce the chemistry, mineralogy, textures and isotope composition of chondrules. Textures and chemical composition of phases in experimental run products will be compared to natural samples and to results from thermodynamic modeling. Melting and cooling at elevated pressures will be tested with respect of explaining retention of Na during chondrule melting. Finally, chondrule crystallization experiments will be conducted in order to investigate the exchange of oxygen between chondrules and a H2Ocontaining gas phase. The goal of the study is the better understanding of chondrules and the process of their formation.

球粒是 0.1 – 1 毫米大的火成球体，它们是球粒陨石的主要组成部分。了解早期太阳星云中球粒的形成机制仍然是陨石学中的主要挑战之一。球粒的化学、矿物学、结构和同位素组成将与天然产品进行比较。将测试高压下的熔化和冷却，以解释球粒熔化过程中的 Na。最后，将进行球粒结晶实验，以研究球粒与含 H2O 气相之间的氧气交换。这项研究的目的是更好地了解球粒及其形成过程。