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

球粒是0.1 - 1毫米大的火成岩球粒。它们是球粒陨石的主要成分。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，以重现球粒的化学，矿物学，质地和同位素组成。实验运行产品中相的结构和化学成分将与自然样品和热力学模型的结果进行比较。将测试在高压下的熔化和冷却，以解释球粒熔化过程中Na的保留。最后，将进行球粒结晶实验，以研究球粒与含h2o气相之间的氧交换。这项研究的目的是更好地了解球粒及其形成过程。

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.