Acquisition of a dilatometer for accurate measurement of thermal expansivity of geologically relevant materials over -180 to 2000oC

1255774霍夫迈斯特地球科学仪器和设施计划的这一部门的赠款支持收购推杆膨胀计能够高精度测量矿物，玻璃和材料的热膨胀率在广泛的温度范围（180？2000摄氏度），与地球深部和地壳阶段的热演化研究有关。 这将是地球科学学术研究部门的第一台此类仪器。 温度对地球物质膨胀和收缩的影响是限制地幔对流模型所需的基本属性。 在现场温度条件下获得的地球深部相的热膨胀率的可靠数据很少，并且有足够的信心为地球动力学模型提供现实的约束。 PI将使用该仪器开发一个关于各种地质材料热膨胀率的广泛数据库，首先从与地壳和地幔有关的特征良好的单晶相和玻璃开始。 PI旨在通过动手测量让学生参与体验式学习。*

1255774HofmeisterThis Division of Earth Sciences Instrumentation and Facilities Program grant supports acquisition of push rod dilatometer capable of high precision measurements of the thermal expansivity of minerals, glasses and materials over a broad range of temperatures (180 ? 2000 deg C ) relevant to study of the thermal evolution of deep Earth and crustal phases. This would be the first such instrument of its kind in an Earth Sciences academic research department. The effect of temperature on the expansion and contraction of Earth materials is a fundamental property needed to constrain models of mantle convection. Few reliable data of thermal expansivity of deep Earth phases exist that were acquired at in situ temperature conditions and with sufficient confidence to provide realistic constraints on geodynamic models. The PI would use the instrument to develop an extensive database on the thermal expansivity of a wide range of geomaterials starting first with well characterized single-crystals phases and glasses relevant to the Earth's crust and mantle. The PI intends to engage students in experiential learning through hands on measurements.***