MRI: Acquisition Of A Modern Electron Microprobe At The University of Maine

0116235 Guidotti该奖项通过重大研究仪器（MRI）计划获得，为获得最先进的电子微探针（EMP）提供支持，用于地质材料的微化学表征。 一个新的EMP将取代缅因州大学地质科学系老化（1981年）的ARL SEMQ。 该仪器将促进变质岩石学中一系列主题的研究，包括变岩中Fe的形态和OH-的分布，以及麻粒岩相岩石中轻元素（即Li，B，Be）的分配。 该仪器还将加强古气候学研究。 该探测器将用于分析冰芯样品中的火山玻璃碎片，以确定微量元素和主要元素的组成。 再加上对可疑来源火山灰的分析，这种化学分析提供了核实冰芯火山灰来源的强大可能性，因此将这些离散事件与同时记录在冰芯中的气候代用品联系起来。 该设施将是缅因州唯一的现代EMP，不仅满足缅因州大学几个系的教师和学生的需求，还满足附近区域机构（即鲍登，南缅因州大学，贝茨）的教师和学生的需求。

0116235GuidottiThis award, made through the Major Research Instrumentation (MRI) Program, provides support for the acquisition of a state-of-the-art electron microprobe (EMP) for the microchemical characterization of geological materials. A new EMP will replace an aging (vintage 1981) ARL SEMQ in the Department of Geological Sciences at the University of Maine. The instrument will facilitate research on a range of topics in metamorphic petrology including, the speciation of Fe and distribution of OH- in metapelites, and light element (i.e. Li, B, Be) partitioning in granulite facies rocks. Research in paleoclimatology will also be enhanced by this instrument. The probe will be used to analyze volcanic glass shards in ice core samples for trace and major element compositions. Coupled with analyses of suspected source tephras, such chemical analyses offer the strong possibility of verifying the provenance of ice core tephra and therefore relating these discrete events to climate proxies also recorded simultaneously in ice cores. This facility will be the only modern EMP in the state of Maine and will serve not only the needs of faculty and students from several departments at the University of Maine , but also the needs of faculty and students from nearby regional institutions (i.e. Bowdoin, Univ. of Southern Maine, Bates).***