Acquisition of an XRF for Geochemical Research on the Earth's Crust and Mantle for Multidisciplinary Chemical Research

9601475这笔赠款通过学术研究基础设施（ARI）计划提供11万美元，作为购买x射线荧光光谱仪（XRF）的部分费用支持，用于在马卡莱斯特学院对火成岩和变质岩、薄膜和土壤进行地球化学分析。各种各样的研究将由麦卡莱斯特大学几个系的教师、明尼苏达州地质调查局的成员和劳伦斯大学的教师进行。利用XRF分析的具体项目将包括岛弧和阿拉斯加板内火山的地球化学特征，作为该地区构造演化的指标，美国大陆中部元古代岩脉群的岩石成因，加拉帕戈斯群岛热点岩浆的地球化学演化，硅和锗基薄膜的表征以及土壤的微量金属地球化学。这笔拨款为这所本科院校提供了最先进的研究仪器，这将对XRF的培训产生重大影响，并填补了以前不容易获得XRF能力的区域空白。＊＊＊

9601475 Wirth This grant, made through the Academic Research Infrastructure (ARI) Program, provides $110,000 as partial support of the costs of acquiring an X-ray fluorescence spectrometer (XRF) for geochemical analyses of igneous and metamorphic rocks, thin films and soils at Macalester College. A variety of research will be conducted by faculty in several departments at Macalester and by members of the Minnesota State Geological Survey and faculty at Lawrence University. Specific projects that will utilize XRF analyses will include the geochemical characterization of island arc and intraplate volcanics from Alaska as indicators of the tectonic evolution of this area, petrogenesis of Proterozoic dike swarms in the Midcontinental U.S., the geochemical evolution of Galapagos hotspot magmas, characterization of silicon and germanium-based thin films and trace metal geochemistry of soils. This grant provides this undergraduate institution with a state-of-the-art piece of research instrumentation which will have a significant impact on the training of and fills a regional gap where the capabilities of an XRF were previously not easily accessible. ***