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

熔融矿物的性质对于理解地球内部的结构和动力学变得越来越重要，因为结晶矿物已经被广泛地研究。该提议将利用同步加速器光束线的新实验能力来研究熔融矿物，并探索城市拥有的设施的新可能性。 本文拟开展的研究工作包括：1）高温高压下Fe-FeS系熔体密度的测定; 2）高压下Fe和H合金化的观察及Fe-H系熔体密度的测定。3)探索熔融硅酸盐密度测量的现实。该项目将使用多砧压力机来产生压力和温度，单色X射线照相术和X-高压下熔体密度测量的射线吸收模拟。铁合金系统密度测量的结果将为理解地球核心成分提供重要信息，并为未来DAC熔体密度测量的发展提供可靠数据，以提高压力范围到核心条件。本项目研究的材料不仅限于岩心矿物。这项研究还将包括探索测量富铁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纳入该项目。 作为该项目的结果，在同步加速器x射线光束线上开发的所有新实验能力将向社会开放，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.