Acquisition of a Cathodoluminescence System: Applications to Sedimentologic, Mineralogical, Geochemical, and Structural Analyses

9906029Soreghan这笔赠款为购买阴极发光(CL)系统提供部分支持，该系统将取代已有20年历史的(不起作用且不可修复的)核素CL示波器。拟议的设备包括一个安装在奥林巴斯B-MAX 50研究显微镜上的PATCO/Nuclide ELM-3R发光镜。为了帮助获取典型的弱光CL图像，显微镜将配备一台诊断仪器SPOT数码相机。一台专用计算机(400 MHz Pentium II或等效物)和图像分析软件(如Adobe Photoshop)将允许处理数字照片。许多矿物(例如方解石、白云石、石英、长石、钻石)在电子束轰击时显示出发光(马歇尔，1988)。矿物中的杂质和/或晶格缺陷对发光现象有很大影响；因此，阴极发光显微镜是研究矿物成分和结构变化的有力工具。它在沉积岩石学中的应用是公认的(例如，Machel和Burton，1991)，但它对其他地球化学和构造研究也是非常有价值的(Sippel和Spencer，1970；Dorobk和Watkinson，1988；马歇尔，1988，Onasch和Davis，1988；Perny等人，1992)。这些设备将由俄克拉荷马大学地质与地球物理学院的四名研究人员用于不同方面的研究和教育。预计的用途包括：(1)沉积地质研究和教育(G.S.Soreghan)；(2)火成岩成因的石英(D.London)；(3)压实/胶结研究(T.A.Dewers)；(4)微尺度应变分析(K.J.Smart)。*

9906029SoreghanThis grant provides partial support for the purchase of a cathodoluminescence (CL) system that will replace a 20-year old (non-functional and irreparable) Nuclide CL scope. The proposed equipment consists of a PATCO/Nuclide ELM-3R Luminoscope attached to an Olympus B-Max 50 research microscope. To aid in the acquisition of typically low-light CL images, the microscope will be equipped with a Diagnostic Instruments SPOT digital camera. A dedicated computer (400 MHz Pentium II or equivalent) and image analysis software (e.g., Adobe Photoshop) will allow for processing of the digital photographs. Many minerals (e.g., calcite, dolomite, quartz, feldspar, diamond) exhibit luminescence when bombarded by an electron beam (Marshall, 1988). Impurities and/or lattice defects within minerals significantly affect the luminescence phenomenon; accordingly cathodoluminescence microscopy is a powerful tool for the study of compositional and structural variations in minerals. Its use in sedimentary petrography is well established (e.g., Machel and Burton, 1991), but it is also extremely valuable for other geochemical and structural studies (Sippel and Spencer, 1970; Dorobek and Watkinson, 1988; Marshall, 1988, Onasch and Davis, 1988; Perny et al., 1992). The equipment will be used by four investigators for varied aspects of research and education within the School of Geology & Geophysics at the University of Oklahoma. Anticipated uses include the following: (1) Sedimentary Geology Research and Education (G.S. Soreghan); (2) Quartz of Igneous Origin (D. London); (3) Compaction/Cementation Studies (T.A. Dewers); (4) Microscale Strain Analysis (K.J. Smart).***