【摘要】 综述了国外扫描电镜—阴极发光(SEM-CL)成像技术在岩石学研究中的应用实例。采用阴极发光探测器和扫描电镜结合的方法对石英等矿物进行观察,可以在高放大倍数和高分辨率下获得其他方法所无法揭示的丰富的微结构信息,如暗条痕和斑块、愈合裂纹、环带、复杂剪切纹、面状结构等,这些不同的微结构成为不同类型岩石中所特有的特征,因此,对沉积岩物源示踪具有较重要的参考价值。岩浆岩及热液石英中所显示的穿插结构、溶解结构、重结晶结构反映矿物多期生长和改造过程,指示岩石形成的物理和化学条件,为岩石成因探讨、岩浆演化以及成矿过程等方面的研究提供重要依据。同时,SEM-CL图像可以清晰地揭示沉积岩中石英胶结物的生长过程,从而为沉积岩的成岩历史提供了重要信息。更多还原

【Abstract】 Recent applications of Scanning Electron Microscope-Cathodo Luminescene(SEM-CL) technique in petrology are summarized.Observations of quartz using CL detectors attached to SEM with high magnification and resolution have shown various microstructures,such as dark streaks,patches,healed fractures,zoning,shears,planar features,etc.,which are invisible under traditional petrographic microcopes.These microstructures are diagnostic for detrital quartz of different origins.Quartz in hydrothermal and magmatic rocks reveals penetration,recrystalization and dissolution textures,indicating multi-generation growths and modifications and physicochemical conditions under which they are formed.Therefore,the new technique applies to studies of sedimentary provenance,petrogenesis,and magmatic and mineralization processes.更多还原