Technical Support for University of California, Riverside Technophysics Laboratory

这项拨款为加州大学河滨分校构造物理实验室的一名技术人员提供部分工资支持。这是EAR/IF项目的第二阶段技术支持拨款。该技术人员本质上是一名机械师，为格林博士用于研究深部地幔阶段变形力学的改良多砧装置的持续发展提供必要的高精度零件制造。这种创新且独特的高压多砧装置在NaCl约束介质中对样品施加剪切应力，从而减少活塞摩擦效应和由此产生的样品体积内的空间温度变化。该装置与深地幔硅酸盐的锗酸盐和钛酸盐类似物的实验结果证实了格林的假设，即俯冲带内的深源地震是橄榄石到尖晶石多晶相变化的结果。高压相变起裂领域的工作继续进行，合成了硅酸盐，改进了格林改进的多砧装置的工程设计。这些实验对我们理解深层地震力学具有很大的希望。＊＊＊

9731383 Green This grant provides partial salary support for a technician at the UC-Riverside Tectonophysics laboratory. This is a Phase II grant for technical support under the EAR/IF program. The technician is essentially a machinist who provides the necessary high precision fabrication of parts for continued development of Dr. Green's modified multianvil device used in studies of the deformation mechanics of deep mantle phases. This innovative and unique high pressure multianvil device introduces shear stresses on samples contained in a NaCl confining media, thereby reducing piston frictional effects and resultant spatial temperature variations within the sample volume. Experimental results using this device with germanate and titanate analogues of deep mantle silicates has resulted in Green's hypothesis that deep-focus earthquakes within subduction zones are the result of a phase change from olivine to a spinel polymorph. Work in the arena of high-pressure phase change initiation of faulting continues with synthetic silicates and improvements in the engineering design of Green's modified multianvil device. These experiments hold considerable promise for our understanding of deep earthquake mechanics. ***