Deciphering the Nature of 'Graphite' in Geological Samples with the Use of Laser Raman Microprobe Spectroscopy

使用激光拉曼显微探针光谱解读地质样品中“石墨”的性质

• 批准号: 8817050
• 负责人: Jill Pasteris
• 金额: $ 9.32万
• 依托单位: Washington University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-01-01 至 1990-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8817050&HistoricalAwards=false
• 关键词: Deciphering; Nature; Graphite; Geological; Samples

Although Raman spectroscopy long has been recognized in material science and solid state physics as a powerful tool for the study of carbonaceous materials (CM), it has barely been used to study "graphite" in samples of geological interest. The overall goal is to evaluate the usefulness of laser Raman microprobe (LRM) spectroscopy to characterize naturally occuring CM. For the purpose of LRM analysis, several suites of progressively metamorphosed CM have been obtained, most of which already have undergone other analyses, such as by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The intention is to develop a routine LRM methodogy 1) to provide relatively rapid evaluation of the degree of crystallinity of "graphite" and its compositional deviations from pure carbon and 2) to be as quantitative as possible in characterizing the kind of carbon. The results will be important in understanding the history of carbon-bearing rock.

尽管拉曼光谱长期以来在材料科学和固体物理学中被认为是研究碳质材料（CM）的有力工具，但它几乎没有被用于研究地质样品中的“石墨”。 总体目标是评估激光拉曼微探针 (LRM) 光谱在表征自然发生的 CM 方面的有用性。 为了进行 LRM 分析，我们获得了几套逐渐变质的 CM，其中大多数已经进行了其他分析，例如通过 X 射线衍射 (XRD) 和透射电子显微镜 (TEM)。目的是开发一种常规 LRM 方法，1) 对“石墨”的结晶度及其与纯碳的成分偏差进行相对快速的评估，2) 尽可能定量地表征碳的种类。 这些结果对于了解含碳岩石的历史非常重要。