Development of a Rapid-Quench, Cold-Seal Hydrothermal Laboratory with Automated Pressure Cycling for Petrologic, Volcanologic, and Ore Deposits Research

0444483约翰斯顿该赠款支持快速淬火，冷密封水热实验室的发展，能够运行到~2千巴和~950摄氏度，并具有自动化，长时间减压和/或压力增加/减少循环的能力。 该装置将能够在适合浅岩浆、火山管道或成矿环境的压力范围内进行静态和/或动态过程的实验模拟。 设想的具体研究包括：利用压力循环模拟火山管道或热液成矿系统的反复排气和再密封，并评估其对复杂带斑晶或石英脉系统形成的影响;利用受控减压研究火山系统中泡孔和渗透性的发展;使用长时间静态实验来确定共存熔体之间的稳定同位素分馏，并研究在火山学相关压力下熔体中的挥发性溶解度。 该实验室将促进PI，火山学（K Cashman，P Wallace），矿床研究（MH Reed）和稳定同位素地球化学（I Bindeman）的同事之间的合作研究，以及他们在俄勒冈州大学地质科学系的学生。 ***

0444483JohnstonThis grant supports the development of a rapid-quench, cold-seal hydrothermal laboratory, capable of operating to ~2 kbar and ~950 deg C and with the capability of automated, long-duration decompression and/or pressure increase/decrease cycling. The device will enable experimental simulation of static and/or dynamic processes in a pressure range that is appropriate for shallow magmatic, volcanic conduit, or ore-forming environments. Specific studies envisioned include: using pressure cycling to simulate repeated venting and resealing of volcanic conduits or hydrothermal ore forming systems and evaluating its impact on the formation of complexly zoned phenocrysts or quartz vein systems; using controlled decompression to study the development of vesicularity and permeability in volcanic systems, and; using long duration static experiments to determine stable isotope fractionations between coexisting melts and to study volatile solubilities in melts at volcanologically relevant pressures. The lab will facilitate collaborative research between the PI, colleagues in volcanology (K Cashman, P Wallace), ore deposits research (MH Reed) and stable isotope geochemistry (I Bindeman), and their students in the Department of Geological Sciences, University of Oregon. ***