Facility Support: The Wisc-SIMS National Ion Microprobe

设施支持：Wisc-SIMS 国家离子微探针

• 批准号: 0744079
• 负责人: John Valley
• 金额: $ 68.35万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-02-15 至 2012-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0744079&HistoricalAwards=false
• 关键词: Facility; Support; Wisc; SIMS; National

This award will provide support for WiscSIMS, the Wisconsin Secondary-Ion Mass-Spectrometer National Ion Microprobe Facility. This laboratory houses the first, new-generation, CAMECA ims-1280 ion microprobe and is rapidly expanding its leadership role as a center of excellence for stable isotope geochemistry. The PI's will initiate investigations combining a variety of isotope systems including: H, Li, B, C, N, O, Mg, Si, S, Cl, Ca, and Fe. They are actively seeking and developing fundamental new applications in many disciplines. The scientific design of projects, and the development of standards and analysis protocols, benefits from close association to three other isotope laboratories in the Department of Geology & Geophysics, where WiscSIMS is located. WiscSIMS takes advantage of new multicollector technology and other advances of the 1280 instrument to focus on the specialized needs of stable isotope geochemistry: high precision, small sample size, and in situ analysis. The ability of an ion microprobe to analyze isotope ratios from 1-10 ụm spots from a microscope slide, reduces sample sizes by a factor of ten thousand to one billion, and allows analyses to be placed in context with textures and other imaging. Excellent analytical precision, as good as 0.1%, is routinely attained for many isotope systems, which reveal trends and correlations that were not previously seen in earlier studies. These advantages are revolutionizing isotope geochemistry, just as the electron microprobe revolutionized in situ chemical analysis and the SHRIMP (ion microprobe) revolutionized zircon geochronology.

该奖项将提供支持WiscSIMS，威斯康星州二次离子质谱仪国家离子微探针设施。 该实验室拥有第一个新一代CAMECA ims-1280离子微探针，并正在迅速扩大其作为稳定同位素地球化学卓越中心的领导作用。PI将结合各种同位素系统进行调查，包括：H、Li、B、C、N、O、Mg、Si、S、Cl、Ca和Fe。 他们正在积极寻求和开发许多学科的基本新应用。 项目的科学设计以及标准和分析协议的制定得益于与WiscSIMS所在的地质地球物理系其他三个同位素实验室的密切联系。 WiscSIMS利用新的多收集器技术和1280仪器的其他进步，专注于稳定同位素地球化学的专业需求：高精度，小样本量和原位分析。离子微探针分析1-10同位素比的能力ụ从显微镜载玻片的m点，减少了一万到十亿倍的样本大小，并允许分析放置在纹理和其他成像的背景下。对于许多同位素系统，通常可达到0.1%的出色分析精度，这揭示了以前研究中未发现的趋势和相关性。这些优点正在彻底改变同位素地球化学，正如电子探针彻底改变原位化学分析和SHRIMP（离子探针）彻底改变锆石年代学一样。