Petrological, Geochemical, and Geophysical Applications of Transmission Electron Microscopy

透射电子显微镜的岩石学、地球化学和地球物理应用

• 批准号: 8903630
• 负责人: David Veblen
• 金额: $ 43万
• 依托单位: Johns Hopkins University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-12-15 至 1995-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8903630&HistoricalAwards=false
• 关键词: Petrological; Geochemical; Geophysical; Applications; Transmission

This work will apply transmission electron microscopy, analysis, and diffraction to several problems of petrological, geochemical, and geophysical importance. Rock-forming minerals can contain populations of submicroscopic inclusions that contain trace and minor elements, which may be significant for processes such as partial melting. It will be determined whether such inclusion dissolve prior to melting and the kinetics of the dissolution process. In situ studies of phase transformations in minerals will be continued. A combination of TEM, SEM, and electron microprobe analysis will be used to examine in detail the reactions and fluid flow regimes that occur during low-grade metamorphism of shale in the central Swiss Alps. Mechanisms of weathering that produce the detrital input for Abert Lake, an alkaline, saline lake in an arid environment, will be determined. The mineralogical and chemical changes occurring in the clays of the lake sediments during diagenesis will be analyzed. These changes have been shown to control the geochemistry of the lake waters.

这项工作将应用透射电子显微镜，分析， 和衍射的几个问题的岩石学， 地球化学和地球物理的重要性。 造岩矿物 可以包含亚微观内含物群体， 微量和次要元素，可能对工艺有重要意义 例如部分熔化。将决定是否这样做。 夹杂物在熔化前溶解， 溶解过程。 相变的原位研究 矿物质将继续。 TEM、SEM和 电子探针分析将用于详细检查 在低品位过程中发生的反应和流体流动状态 瑞士阿尔卑斯山中部页岩的变质作用。 机制 风化产生的碎屑输入阿伯特湖， 碱性，盐湖在干旱环境中，将被确定。 粘土中发生的矿物学和化学变化 分析成岩作用期间的湖泊沉积物。 这些 研究表明，变化控制着湖泊的地球化学特征 沃茨。