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毫米大的火成球粒。它们是南极陨石的主要成分。了解早期太阳星云中形成球粒的机制仍然是陨石学的主要挑战之一。我们将使用无容器熔化装置进行实验，以再现陨石球粒的化学、矿物学、结构和同位素组成。实验运行产品中各相的纹理和化学组成将与天然样品以及热力学建模的结果进行比较。在升高的压力下的熔化和冷却将进行测试，解释在球粒熔化期间Na的保留。最后，将进行球粒结晶实验，以研究球粒和含H2O的气相之间的氧交换。这项研究的目的是更好地了解陨石球粒及其形成过程。