Upgrade of the University of Puerto Rico Electron Microprobe

该提案寻求约16.3万美元的资金，用于升级和增强目前在UPRG的老式SX-50电子探针的能力。具体来说，pi打算用更新的、可使用的软件（Probe for Windows）升级计算机系统，购买新的能量色散光谱仪（EDS）检测和电子系统，获得并安装用于轻元素分析的PC1衍射晶体，并采购这些实验室用品以保持仪器的正常运行和有效运行。大学将维持现有仪器的服务合同，并拥有足够的支助设施。研究应用将包括球粒陨石探针分析以阐明内行星和小行星的地质组成和历史，碳质和其他球粒陨石中变形虫橄榄石包裹体（AOIs）的探针分析作为热液蚀变的代理，通过锆石地球化学了解岛弧岩浆，通过碎屑锆石分析了解早期地球地质，完善基性包体与其主花岗岩之间的关系。了解与岛弧相关的岩基、白云岩微量元素地球化学、基于锶同位素的石灰岩年龄估计、海滩岩石岩化作用和Sr/Ca比值作为古温度指标。该仪器是加勒比区域唯一的一种此类仪器。它将在每学年为115-130名学生提供教学支持。在接下来的几年里，pi将把使用和培训纳入高级地质学课程。升级后的探针也将用于本科生和研究生阶段的学生研究项目。作为一项真正的区域性工具，该调查将为该地区提供独特的资源，并支持一所几乎完全由来自代表性不足人口的学生就读的机构。* * *

0842127ChizmadiaThis proposal seeks funding of ~$163K to upgrade and enhance the capabilities of an older SX-50 electron probe currently at UPRG. Specifically, the PIs intend to upgrade the computer system with newer, serviceable software (Probe for Windows), purchase a new energy dispersive spectrometer (EDS) detection and electronics system, obtain and install a PC1 diffraction crystal for light element analyses, and procure such laboratory supplies to keep the instrument up and running effectively. The University will maintain the service contract on the existing instrument and has adequate support facilities. Research applications would include chondrite probe analyses to elucidate the geologic makeup and history of inner planets and asteroids, probe analysis of amoeboid olivine inclusions (AOIs) in carbonaceous and other chondrites as a proxy for hydrothermal alteration, understanding island arc magmas through zircon geochemistry, understanding early Earth geology through detrital zircon analysis, refine relationships between mafic xenoliths and their host granitoids, understanding batholiths associated with island arcs, dolomite trace element geochemistry, limestone age estimates based on strontium isotopes, beach rock lithification, and Sr/Ca ratios as paleotemperature proxies. The instrument is the only one of its kind in the Caribbean region. It will support 115-130 students in a pedagogical role during each school year. Over the next several years the PIs will incorporate usage and training into an upper level geology course. The upgraded probe will also be used in student research projects at both undergraduate and graduate levels. As a truly regional instrument, the probe will represent a unique resource for the region and support an institution attended almost exclusively by students from an under-represented population. ***