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

0116235指导通过重大研究仪器(MRI)计划颁发的这一奖项，为获得用于地质材料微观化学表征的最先进的电子微探针(EMP)提供支持。一个新的电磁脉冲将取代缅因州大学地质科学系老化的(1981年的)ARL SEMQ。该仪器将有助于变质岩石学中的一系列课题的研究，包括变质岩中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。该仪器还将加强对古气候学的研究。该探测器将用于分析冰芯样品中的火山玻璃碎片的痕量和主要元素组成。再加上对疑似来源特弗拉的分析，这种化学分析提供了很大的可能性来核实冰芯特弗拉的来源，从而将这些离散事件与也同时记录在冰芯中的气候指标联系起来。该设施将是缅因州唯一的现代化电磁脉冲，不仅满足缅因州大学几个系的教职员工和学生的需求，而且还满足附近地区机构(即鲍登大学)的教职员工和学生的需求。缅因州南部，贝茨)。*

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).***