Facility Support: The Wisc-SIMS National Ion Microprobe

该奖项将为威斯康星州二次离子质谱仪国家离子微探测器设施WiscSIMS提供支持。该实验室拥有第一个新一代Cameca IMS-1280离子微探测器，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。国际和平研究所将结合H、Li、B、C、N、O、镁、硅、S、氯、钙和铁等多种同位素体系展开研究。他们正在积极寻求和开发许多学科的基础新应用。项目的科学设计以及标准和分析方案的制定，得益于与WiscSIMS所在的地质与地球物理系的其他三个同位素实验室的密切联系。WiscSIMS利用新的多采集器技术和1280仪器的其他进步，专注于稳定同位素地球化学的特殊需求：高精度、小样本量和现场分析。离子微探头能够从显微镜载玻片上分析1-10-10；m点的同位素比率，将样本大小减少一万到十亿倍，并允许将分析与纹理和其他成像放在一起。许多同位素系统的分析精度通常高达0.1%，这揭示了以前研究中未曾见过的趋势和相关性。这些优势正在给同位素地球化学带来革命性的变化，就像电子探针使原位化学分析发生革命性变化，离子探针(SHRIMP)使锆石年代学发生革命性变化一样。

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.