Acquisition and Upgrade of Research Equipment at Oxy-Anion Stable Isotope Consortium at Louisiana State University

路易斯安那州立大学氧阴离子稳定同位素联盟研究设备的采购和升级

• 批准号: 1312284
• 负责人: Huiming Bao
• 金额: $ 37.54万
• 依托单位: Louisiana State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-08-15 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1312284&HistoricalAwards=false
• 关键词: Acquisition; Upgrade; Research; Equipment; Oxy

This grant supports acquisition of the following pieces of equipment to be added to the Oxy-Anion Stable Isotope Consortium (OASIC) at Louisiana State University (LSU): (1) An isotope-ratio mass spectrometer (IRMS); (2) optical replacement parts for an existing CO2-laser system; (3) A CRDS water isotope analyzer; (4) A thermogravimetric analyzer (TGA); and (5) a Gas Chromatograph (GC). The IRMS will be used mainly for ä34S measurement of sulfate and sulfide samples. The optical parts are replacing a clouded window. The CRDS, TGA, and GC are three critically missing pieces of equipment in the laboratory.Over the years, PI and his students have developed new wet chemistry methods and new extraction techniques that have opened up several research frontiers, including (1) Sulfate non-mass-dependent (NMD) depletion of the isotope 17O in the immediate aftermath of the global Marinoan glaciation at ~635 million years ago (funded by NSF Geobiology & Low-Temperature Geochemistry and NASA Astrobiology); (2) Sulfate NMD enrichment of the isotope 17O in volcanic ash beds in Cenozoic North America (funded by NSF Petrology & Geochemistry); (3) The discovery of NMD enrichment of the isotope 17O in natural perchlorate; and (4) NMD behaviors for rarefied gases (O2 and SF6) under a thermal gradient. Recently, OASIC?s capacity has been increasingly constrained due to equipment aging and lack of some of the essential instruments. The requested addition will allow the PI and graduate students to expand and test several new ideas in (1) non-mass-dependent stable isotope geochemistry, (2) isotope fractionation kinetics (e.g. incorporation and elimination or O2 signal in sulfate), and (3) mineral-gas oxygen isotope behaviors related to material and energy sciences, a new campus-wide LSU initiative. The upgrade will (1) enhance hands-on and interdisciplinary training of culturally and ethnically diverse postdoctoral researchers, graduate and undergraduate students, through supervised installation, self-maintenance, operation, and repair, and through collaboration with researchers around the world; (2) fill in a critical infrastructure need at the interface of geology, material science & engineering, and coastal studies within LSU research community; and (3) establish LSU OASIC as the go-to place for a leading-edge stable isotope laboratory in the South.

该赠款支持收购以下设备，该设备要添加到路易斯安那州立大学（LSU）的Oxy-Anion稳定同位素联盟（OASIC）：（1）同位素比率质谱仪（IRMS）； （2）现有CO2激光系统的光学替换零件； （3）CRDS水同位素分析仪； （4）热重分析仪（TGA）； （5）气相色谱仪（GC）。 IRMS将主要用于硫酸盐和硫化物样品的测量。光学零件正在替换蒙模窗。 CRDS，TGA和GC是实验室中的三个严重缺少的设备。地球生物学和低温地球化学和NASA天体生物学）； （2）硫酸盐NMD在北美的杜鹃花灰床中富集同位素17o（由NSF岩石学和地球化学资助）； （3）在天然高氯酸盐中发现同位素17o的NMD富集； （4）在热梯度下稀疏气体（O2和SF6）的NMD行为。最近，由于设备老化和缺乏某些必需仪器，绿洲的能力受到了限制。请求的补充将使PI和研究生可以在（1）（1）非依赖性稳定的同位素地球化学，（2）同位素分馏动力学（例如，硫酸盐中的并消除和O2信号）和（3）矿物质同位素氧气行为与材料和能量训练界相关的（3）矿物质同位素行为。升级将（1）通过监督的装置，自我维护，操作和维修来增强对文化和种族多元化的博士后研究人员，研究生和本科生的动手和跨学科培训，并通过与世界各地的研究人员合作； （2）在LSU研究社区内的地质，材料科学与工程以及沿海研究的界面上满足了关键的基础设施需求； （3）建立LSU绿色绿色绿化量，成为南部的前沿同位素实验室的首选。