Abstract
Heated quartz emits light whose intensity is proportional to its equivalent dose. This light is called thermoluminescence (TL). Because of such response, TL from quartz is applied to dating of archeological materials and geological sediments. If the equivalent doses of quartz grains in gouges are reset due to heating during a fault movement, TL could be utilized to dating of fault movements. However, many researchers doubt such assumption. Here, we measure TL from milled quartz grains and inspect quantitavely the reduction of TL sources based on the diameter dependence of TL intensity. Moreover, considering surface disordered layers on milled grains, we discuss the mechanisms of the reduction. Finally, we comment on TL dating of fault movements.
