CAREER: Crystallization Kinetics in Volcanology

在本次职业生涯奖中，实验岩石学技术将通过研究质量传递、反应动力学和相变来探索岩浆房和火山导管的动态化学环境。岩浆库和管道条件下含水硅酸盐熔体的结晶将(1)监测岩浆库减压条件下晶体种群大小、数量和形状的演变，(2)解决成核现象的关键和持久问题，(3)确定晶体生长的机制和速率，特别是在小冷却驱动和脱挥发驱动的过饱和条件下。这些研究的一个关键特征是实验工作与前沿分析技术的结合，如透射电子显微镜和电子背散射衍射。该研究有望严格检验封闭系统中晶体尺寸分布演化的定量模型，并为从喷发岩石的晶体结构中破译岩浆运移历史做出根本性贡献。拟议研究的更广泛影响围绕着科学研究和人力资源开发的综合计划。一项针对K-12教师的火山岩石学研究体验计划（RET/V-P）将为教师提供一个机会，在夏季与本科生和研究生一起参加为期六周的研究活动。目标是实现一个协作实验室小组，其中本科生从事高级论文研究项目，研究生获得指导本科生和教师的领导经验，教师加深他们的信心和对科学内容的掌握，整体受益于不同的学习视角。

In this CAREER award, experimental petrology techniques will be used to explore the dynamic chemical environments of magma chambers and volcanic conduits through studies of mass transport, reaction kinetics, and phase transformations. Crystallization of hydrous silicate melt at magma reservoir and conduit conditions will (1) monitor the evolution of the sizes, quantities, and shapes of crystal populations during decompression from magma chamber conditions, (2) address the crucial and persistent problem of nucleation phenomena, and (3) determine the mechanisms and rates of crystal growth, particularly at small cooling-driven and devolatilization-driven supersaturation. A key feature of these studies is the combination of experimental work with frontier analytical techniques in transmission electron microscopy and electron backscatter diffraction. The research is expected to rigorously test quantitative models of crystal size distribution evolution in closed systems and make a fundamental contribution toward deciphering magma transport history from the crystal textures of erupted rocks. The broader impacts of the proposed studies center around an integrated plan for scientific research and human resource development. A research experience program for K-12 teachers in volcano-petrology (RET/V-P) will provide an opportunity for teachers to participate in research activities with undergraduates and graduate students for six weeks during the summer. The goal is to achieve a collaborative lab group wherein undergraduate students pursue senior thesis research projects, graduate students gain leadership experience mentoring the undergraduates and teachers, teachers deepen their confidence and mastery of science content, and the ensemble benefits from exposure to different learning perspectives.