Implementing Discovery-Based Geochemistry Labs and Broadening the Scope of Research Projects in Introductory and Advanced Geology Courses through XRF-Spectrometry

通过 XRF 光谱法实施基于发现的地球化学实验室并扩大入门和高级地质学课程的研究项目范围

• 批准号: 9751006
• 负责人: Timothy Lincoln
• 金额: $ 7.9万
• 依托单位: Albion College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-09-01 至 1999-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9751006&HistoricalAwards=false
• 关键词: Implementing; Discovery; Based; Geochemistry; Labs

This project is supporting a sequence of discovery-based geochemistry laboratory projects. It is making improvements in the research projects of three other geology courses, including a high-enrollment introductory course, and supporting an expanding student research program. All of these improvements are being made possible by the new x-ray fluorescence spectrometer (XRF) and supporting equipment. In order to make geochemistry more appropriate for chemistry and biology majors in environmental sciences concentration, as well as for geology majors interested in environmental fields, a sequence of laboratory projects is being implemented to give students a detailed view of the rock cycle from a chemical perspective. The subjects of these projects include chemical weathering, adsorption, sedimentary differentiation, and igneous fractionation. The XRF equipment enhancing existing projects in other courses by expanding the precision and range of analytical work available to students. In Introductory Geology, a successful water-quality research project is being broadened by allowing students to work with sediment and soil samples as well as with water. In Petrology, the precision and efficiency of the spectrometer is allowing faculty to expand class projects on the chemistry of rock suites to the point that analytical work is becoming the principal means of introducing the chemical characteristics of important rock associations. In Environmental Geology, class research projects are being expanded by work with soils and sediments.

该项目正在支持一系列以发现为基础的地球化学实验室项目。它正在改进其他三门地质学课程的研究项目，包括一门高入学率的入门课程，并支持扩大学生研究计划。 所有这些改进都是通过新的X射线荧光光谱仪（XRF）和配套设备实现的。 为了使地球化学更适合环境科学专业的化学和生物专业，以及对环境领域感兴趣的地质专业，正在实施一系列实验室项目，让学生从化学角度详细了解岩石周期。 这些项目的主题包括化学风化、吸附、沉积分异和火成岩分馏。 XRF设备通过扩大学生可用的分析工作的精度和范围来增强其他课程中的现有项目。 在地质学导论中，一个成功的水质研究项目正在扩大，允许学生使用沉积物和土壤样本以及水。 在岩石学中，光谱仪的精度和效率使教师能够扩展岩石套件化学的课程项目，使分析工作成为介绍重要岩石协会化学特征的主要手段。 在环境地质学中，班级研究项目正在通过土壤和沉积物的研究来扩展。