In Situ Density Measurements of Molten Minerals at High Pressures and Temperatures

熔融矿物的性质对于了解地球内部的结构和动力学变得越来越重要，因为晶体矿物已经得到了更广泛的研究。该提案将利用同步束流线的新实验能力来研究熔融矿物，并在社区拥有的设施中探索新的可能性。拟开展的研究工作包括：1)在高压和高温下测量Fe-Fe - es熔体的密度；2)在高压下观察Fe和H的合金化并测量Fe-H熔体的密度。3)探讨熔融硅酸盐密度测量的现实性。该项目将使用多砧压机来产生压力和温度，并使用单色x射线照相和x射线吸收模拟来测量高压下的熔体密度。铁合金系统的密度测量结果将为了解地球核心组成提供必要的信息，并为未来DAC熔体密度测量的发展提供可靠的数据，以将压力范围提高到核心条件。本项目研究的材料并不局限于岩心矿物。这项研究还将包括探索测量富含铁的硅酸盐熔体的可能性。随着研究的进行，合作和技术发展将被引入该项目。所有在同步加速器x射线束线上开发的新实验能力作为这个项目的结果将向社会开放用于科学研究。

The properties of molten minerals become more and more important forunderstanding the structure and dynamics of the Earth's interior, ascrystalline minerals have been much more extensively studied. This proposalwill take the advantage of new experimental capabilities at synchrotronbeamlines to study molten minerals, and to explore new possibilities at thecommunity owned facilities. The proposed research activities include: 1)Measuring the density of molten Fe-FeS system at high pressures andtemperatures 2) Observing Fe and H alloying at high pressure and measuringdensity of Fe-H melt. 3) Exploring the reality of density measurements ofmolten silicates. The project will use a multi-anvil press for pressure andtemperature generation, and monochromatic x-ray radiography and x-rayabsorption simulation for melt density measurements at high pressures.Results of density measurements on the iron alloy system will provide essentialinformation for understanding Earth's core composition and robust data forfuture DAC melt density measurement development to advance the pressurerange up to core conditions. The materials to be studied in this project arenot limited to core minerals. This research will also include exploring the possibility of measuring iron-rich silicate melts. Collaborations and technical developments will bebrought into the project as the research proceeds. All of the newexperimental capabilities developed at synchrotron x-ray beamlines as aresult of this project will be open to the community for scientificresearch.