Acquisition of a Laser Fluorination System for Oxygen Isotopes at IIRMES, California State University, Long Beach

该合同将用于获取用于制造激光氟化系统的材料，以制备用于氧同位素测量的样品。激光氟化系统将允许小规模的同位素变化研究，增加样品吞吐量，并允许同位素测量抗？矿物质。同位素将用于了解含水流体在岩浆、热液系统、沉积盆地、热液喷口系统、浅层俯冲带和地下水循环中的作用。水岩相互作用历史将用于了解变质岩的发掘。激光氟化可以对岩石中的单个矿物进行氧同位素测量，从而更好地限制地质年代学冷却。作为地球科学多样性增强计划（GDEP）的一部分，新系统将对卡塔利娜片岩的样本进行分析，以更好地了解岩石学和构造演化。热蚀变侵入体的氧同位素数据将用于建立同位素不平衡程度，以估计内华达州南白松山脉的水岩比和热液活动的持续时间。此外，将使用激光氟化分析流体包裹体以揭示二氧化硅源。稳定同位素将用于寻找历史上的燧石和古印第安石英岩工具。生物成因的二氧化硅和沉积物有机质将被分析并用作估计过去氧和盐度浓度的代用物。该氟化系统将使CSULB能够为地质和考古同位素和微量元素（GAITE）测量提供全系统设施。该仪器将用于本科生和研究生水平的学生培训。CSULB是一所西班牙裔服务机构，在授予少数民族学士学位方面排名很高。材料、环境与社会综合研究所（IIRMES）于2004年正式成立，旨在促进具有不同教育和研究背景的教师和学生之间的知识交流和跨学科合作。PI将负责建造真空管道，这些仪器将安装在IIRMES设施的CSULB稳定同位素实验室。该设施将收取外部样品的费用。＊＊＊

0949044HolkThis award will be used to acquire materials for fabricating a laser fluorination system to prepare samples for oxygen isotope measurements. The laser fluorination system will allow small-scale isotopic variation studies, increase sample throughput, and allow isotope measurements on ?resistant? minerals. Isotopes will be used to understand the role of aqueous fluids in the genesis of magmas, hydrothermal systems, sedimentary basins, hydrothermal vent systems, shallow subduction zones, and in groundwater circulation. Water-rock interaction history will be applied to understand metamorphic rock exhumation. Laser fluorination would allow oxygen isotope measurements on individual minerals within rocks, allowing better constraints on geochronologic cooling. As part of the Geoscience Diversity Enhancement Program (GDEP), samples from the Catalina Schist will be analyzed by the new system to better understand petrologic and tectonic evolution. Oxygen isotope data from thermally-altered intrusions will be used to establish the degree of isotopic disequilibrium to estimate water-rock ratios and duration of hydrothermal activity in the Southern White Pine Range in Nevada. In addition, fluid inclusions will be analyzed using laser fluorination to reveal silica sources. Stable isotopes will be used to source historic gunflints and paleoindian quartzite tools. Biogenic silica and sediment organic matter will be analyzed and used as a proxies to estimate past oxygen and salinity concentrations. This fluorination system would allow CSULB to provide a system-wide facility for geology and archeology isotope and trace elements (GAITE) measurements. The instrument will be used for undergraduate and graduate-level student training. CSULB is a Hispanic Serving Institution and is highly ranked for conferring minorities with bachelors. The Institute for Integrative Research in Materials, Environments, and Society (IIRMES) was formally established in 2004 with a purpose to promote intellectual exchange and foster interdisciplinary collaborations among faculty and students with different educational and research backgrounds. The PI will be responsible for building the vacuum lines The instruments will be installed at the CSULB stable isotope laboratory in the IIRMES facility. The facility will operate as fee-based for outside samples. ***