Solid State Geochemistry: High-Resolution Transmission Electron Microscopy of Minerals

固态地球化学：矿物的高分辨率透射电子显微镜

• 批准号: 9219376
• 负责人: Peter Buseck
• 金额: $ 64.5万
• 依托单位: Arizona State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-02-01 至 1998-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9219376&HistoricalAwards=false
• 关键词: Solid; State; Geochemistry; Resolution; Transmission

This project is dedicated to the study, at the finest microscope scale attainable, of minerals and their deviations from structural and chemical ideality. Electron-beam techniques will be applied, including high-resolution transmission and analytical electron microscopy as well as scanning probe microscopy (scanning tunneling and atomic force) to study localized regions of structural and chemical disorder in minerals. Such regions are common and provide insights into (a) the origin and geologic history of the host minerals, which act as recorders of uncompleted reactions; and (b) reaction mechanisms such as occur during metamorphism, diagenesis, and weathering. The PI and team plan specifically to study layer silicate minerals (including mixed-layer chlorite/smectite and corrensite; berthierine, Fe-rich chlorite, and mixed layer intermediates; and a unique fibrous mica), and C-60 and other fullerenes found in nature. They also will explore the use of advanced techniques such as TEM cathodoluminescence, high-angle annular dark-field compositional mapping, scanning probe microscopy, and ultra-high resolution electron microscopes as applicable to the study of minerals

该项目致力于在可达到的最精细显微镜尺度上研究矿物及其与结构和化学理想性的偏差。将应用电子束技术，包括高分辨率透射和分析电子显微镜以及扫描探针显微镜（扫描隧道效应和原子力）来研究矿物中结构和化学无序的局部区域。这些区域很常见，可以深入了解（a）宿主矿物的起源和地质历史，它们充当未完成反应的记录器； (b) 变质作用、成岩作用和风化过程中发生的反应机制。 PI 和团队计划专门研究层状硅酸盐矿物（包括混合层绿泥石/蒙脱石和斜岭石；贝蒂碱、富铁绿泥石和混合层中间体；以及独特的纤维状云母），以及在中发现的 C-60 和其他富勒烯。自然。他们还将探索使用 TEM 阴极发光、高角度环形暗场成分测绘、扫描探针显微镜和超高分辨率电子显微镜等先进技术来研究矿物