Acquisition of a Stable Isotope Facility to Study Earth and Environmental Systems and Processes

购买稳定同位素设施来研究地球和环境系统及过程

• 批准号: 9977209
• 负责人: Greg Arehart
• 金额: $ 24万
• 依托单位: Board of Regents, NSHE, obo University of Nevada, Reno
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-09-01 至 2001-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9977209&HistoricalAwards=false
• 关键词: Acquisition; Stable; Isotope; Facility; Study

9977209ArehartThis grant, made through the Major Research Instrumentation (MRI) Program, provides partial support of the costs of acquiring a stable isotope facility to study Earth and environmental processes at the University of Nevada, Reno. The facility will be composed of two major components, which have been selected based on the large numbers of analyses anticipated for the facility, and the diverse nature of the studies to be supported by this instrumentation, requiring analysis of a broad range of sample types (liquids, solids, gases, dissolved components). First, a dual inlet stable isotope ratio mass spectrometer with H/D collectors and a multi-sample manifold, which will be used for the analysis of various samples prepared off-line (e.g. silicates, carbonates, waters). Second, a single inlet - continuous flow stable isotope mass spectrometer equipped with H/D collectors, a gas chromatography - combustion/pyrolysis unit, and an elemental analyzer. This will be used for studies requiring high sample throughput (e.g. ecological studies), and for studies requiring C and H isotope analysis of individual organic compounds within a complex mixture. Specific examples of ongoing and planned research activities that will benefit from this instrumentation include the study of: the origin of Carlin-type sedimentary hosted gold deposits; the geochemistry and geothermometry of active and fossil geothermal systems; the geochemical behavior of sulfur in ore-related igneous rocks; the stable isotope geochemistry of organic contaminants in ground water; the biogeochemical behavior of nitrogen in forested ecosystems as recorded in tree rings; the magnetite - water fractionation factor at low temperature; early diagenesis and paleoceanography in the Black Sea; biogeochemical cycling of nutrients at Lake Tahoe; dolomitization events in the Great Basin; and continental paleoclimate in western North America.***

9977209 arehart这项拨款通过主要研究仪器（MRI）计划获得，为内华达大学里诺分校购置稳定同位素设备以研究地球和环境过程的费用提供部分支持。该设施将由两个主要组成部分组成，这两个部分是根据该设施预期的大量分析和该仪器支持的研究的多样性而选择的，需要分析广泛的样品类型（液体、固体、气体、溶解成分）。首先是双入口稳定同位素比质谱仪，带有H/D收集器和多样品歧管，将用于分析离线制备的各种样品（例如硅酸盐，碳酸盐，水）。其次，单入口-连续流稳定同位素质谱仪配备H/D收集器，气相色谱-燃烧/热解装置和元素分析仪。这将用于需要高样品通量的研究（例如生态学研究），以及需要在复杂混合物中对单个有机化合物进行C和H同位素分析的研究。将受益于这种仪器的正在进行和计划中的研究活动的具体例子包括：卡林型沉积型金矿床的成因研究；活动地热系统和化石地热系统的地球化学和地热测量；含矿火成岩中硫的地球化学行为地下水中有机污染物的稳定同位素地球化学特征树木年轮记录的森林生态系统中氮的生物地球化学行为低温条件下磁铁矿-水分选因子；黑海早期成岩作用与古海洋学；太浩湖营养物的生物地球化学循环；大盆地白云化事件；北美西部大陆古气候。***