Thermoluminescence in Quartz Irradiated by Gamma Rays —A Mineralogical and Geological Application —

Thermoluminescence was applied to quartz from various geological origins. And the difference of geological occurrences of quartz was detectable from their glow peaks. When irradiated by gamma rays, three kinds of glow peak (A, B and C peak) appear-ed. In this paper, the nature of B and C peak in quartz from various rocks was discussed, mainly the heights and the positions of C peaks after gamma irradiation of 10 ' roentgen were examined. Then it was clarified that the height and the position of C peak are closely related to the geological origin. Many works regarding thermoluminescence in quartz are well known.'-'' The nature of glow peaks appeared at various temperatures has been discussed and recently the nature of glow peaks in quartz irradiated by x-rays or gamma rays has considerably clarified by using various methods. Until now, none of the study of thermoluminescence in quartz has been studied from geological point of view. Quartz grains (100-200 mesh) from various rocks were separated by hand picking, heavy solution and magnetic method. Separated quartz samples wer