Japan JSPS Program: Investigation of Oxygen Fugacity in Petrologic Experiments at Ultra-High Pressures

小行星9415224 该奖项支持了为期12个月的日本科学促进会博士后奖学金。 布里奇特·奥尼尔，加州大学地质与地球物理系， 日本东京 奥尼尔博士将与固态物理研究所的Takehiko Yagi博士合作， 日本JSPS计划：岩石学中氧逸度的研究 超高压实验。 氧逸度是反映地幔样品构造过程的岩石学参数。 通常 氧逸度是低压岩石学实验中的受控参数， 地壳和上地幔中不到70公里的深度。 地球的地幔延伸到 深度约为2900公里，对应的压力约为135吉帕斯卡。 迄今为止， 在这种超高压下，控制或测定氧逸度。 奥尼尔博士和博士。 八木将利用筑波大学的高压设施来适应氧逸度控制 超高压实验技术。 团队将系统地进行氧逸度 在不同的温度条件下，在压力大于5吉帕斯卡的实验。 他们的研究 将不仅扩大地质压力计和地质温度计的校准范围， 使许多高Tc超导体的转变温度最大化。 ***

9415224 O Neill This award supports a 12-month Japan Society for the Promotion of Science Postdoctoral Fellowship for Dr. Bridget O Neill, Department of Geology and Geophysics, University of California, at the University of Tokyo, Japan. Dr. O Neill will work with Dr. Takehiko Yagi, Institute for Solid State Physics, on a research project entitled, Japan JSPS Program: Investigation of Oxygen Fugacity in Petrologic Experiments at Ultra-High Pressures. Oxygen fugacity is a petrologic parameter which reflects the tectonic processes of mantle samples. Usually oxygen fugacity is a controlled parameter in low pressure petrologic experiments simulating conditions of the Earth s crust and to a depth of less than 70 km in the upper mantle. The Earth s mantle extends to a depth of about 2900 km, corresponding to a pressure of about 135 Gigapascals. To date no attempts have been made to control or determine the oxygen fugacity at such ultra-high pressures. Dr. O Neill and Dr. Yagi will utilize the high-pressure facilities at the University of Tsukuba to adapt oxygen fugacity control techniques to ultra-high pressure experiments. The team will systematically conduct oxygen fugacity experiments at pressures greater than 5 Gigapascals under different temperature conditions. Their research will not only extend the calibration range of geobarometers and geothermometers but will be useful in maximizing the transition temperature of many high-Tc superconductors. ***