Acquisition of LA-ICP-MS Facilities for Geochemical Research

9904323SeyfriedThis grant supports the acquisition and development of a laser ablation（LA）-ICP-MS facility for geological research in the Department of Geology and Geophysics at the University of Minnesota. 具体而言，资金将用于购买配备紫外激光系统的四极杆ICP-MS，用于固体材料的微尺度采样。由于激光技术在设计和性能方面的最新进展，以及现代ICP-MS仪器在灵敏度和信号处理特性方面的显著改进，现在有可能开展广泛的研究活动，这些活动与明尼苏达州正在进行的和未来的地球化学活动密切相关。 将利用新的ICP-MS的研究项目包括：在环境温度和压力下对大洋中脊玄武岩中矿物-流体平衡和动力学进行实验测定;开发氧化钇稳定的氧化锆陶瓷膜，用作高温高压下的pH和氧化还原电极;研究变质矿物中的微量元素分区;对多砧压机的实验产品进行地球化学分析;以及调查生物碳酸盐微量元素的微观分布情况。

9904323SeyfriedThis grant supports the acquisition and development of a laser ablation (LA)-ICP-MS facility for geochemical research in the Department of Geology and Geophysics at the University of Minnesota. Specifically, funds will be used to acquire a quadrupole-based ICP-MS equipped with a UV laser system for microscale sampling of solid materials. Owing to recent advances in the design and performance of laser technology, together with the striking improvements in sensitivity and signal processing characteristics of modern ICP-MS instruments, a wide range of research initiatives will now be possible that relate well to on-going and future activities in geochemistry at Minnesota. Research projects that will make use of the new ICP-MS include: experimental determinations of mineral-fluid equilibria and kinetics in mid-ocean ridge basalts (MORB) at ambient temperatures and pressures; development of yittria-stabilized zirconia ceramic membranes for use as pH and redox electrodes at elevated temperatures and pressures; studies of trace element zoning in metamorphic minerals; geochemical analysis of experimental run products from the multi-anvil press; and investigations of the microscale distribution of trace elements in biogenic carbonates.***