The luminescence induced by the bombardment of minerals in polished thin section with electrons. The technique is particularly useful in the identification of mineral cements and overgrowths produced in successive episodes, or for distinguishing between particles and authigenic overgrowths. The particles and each separate generation of cement will be of slightly different chemical composition, and so will luminesce with slightly different colours. See quartz overgrowth.
Subjects: Earth Sciences and Geography.