Experimental Investigation of the Rheology of Partially Molten Quartzo-Feldspathic Aggregates at Crustal Temperatures and Pressures

9706189绿色 调查人员将继续对部分熔融的地壳岩石的流变学以及熔体分离和提取的机制进行实验研究。 在接下来的一年里，他们将对不同粒度的部分熔融石英-石英石聚集体进行变形实验，以确定蠕变的粒度敏感性，从而确定这些条件下的速率控制过程。 他们还将研究熔体偏析的机制，通过变形部分熔融的样品与并列的多孔材料作为熔体槽。 通过使具有不同熔融分数的岩石变形，他们希望确定岩石可以容纳的熔融量，并且仍然通过韧性机制变形。 这些变形实验将在利用熔融盐电池的格里格斯型变形装置中进行，以优化装置的应力敏感性。 ***

9706189 Green The investigators will continue their experimental study of the rheology of partially molten crustal rocks and of mechanisms of melt segregation and extraction. Over the next year they will conduct deformation experiments on partially molten, quartzo-feldspathic aggregates of various grain sizes to determine the grain-size sensitivity of creep, and thus the rate-controlling process under these conditions. They will also investigate mechanisms of melt segregation by deforming partially molten samples with juxtaposed porous material to act as a melt sink. By deforming rocks with different melt fractions, they hope to determine the amount of melt that the rock can hold and still deform by ductile mechanisms. These deformation experiments will be conducted in a Griggs-type deformation apparatus utilizing the molten salt cell to optimize the stress sensitivity of the apparatus. ***