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.

该奖项将为威斯康星州的威斯康星州二次质谱计国家离子微探针设施提供支持。 该实验室设有第一个新一代，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将启动调查，结合各种同位素系统，包括：H，LI，B，C，N，O，MG，SI，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方案的制定从密切关联中受益于威斯西西姆州所在的地质与地球物理学部的其他三个同位素实验室。 Wiscsims利用了新的多策略技术和1280工具的其他进步，专注于稳定的同位素地球化学的专业需求：高精度，小样本量和原位分析。离子微探针从显微镜幻灯片中分析1-10＆＃7909; m斑点的同位素比的能力，将样本量降低了一倍至十亿，并允许与纹理和其他成像的上下文进行分析。对于许多同位素系统，常规获得了出色的分析精度，高达0.1％，这揭示了以前在早期研究中没有看到的趋势和相关性。这些优势正在彻底改变同位素地球化学，就像电子微探针彻底改变了原位化学分析，而虾（Ion Microprobe）彻底改变了锆石的年代学。