断層活動年代測定における完全ゼロイング検証法 : TL信号強度に対する熱パルス的加熱効果の実験的検討から

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We have investigated an elementary process attributable to heat in recovery of radiation damage at the time of fault movement, searching the decrease of thermoluminescence (TL) intensities for quartz grains heated by the instantaneous thermal contact and being of 105～150μm diameter. As a result of the experiments, we have found the following facts: (1) It cannot be always expected that radiation damage is completely recovered at just an elevated temperature of each sample heated by the instantaneous thermal contact. The complete zeroing is detectable in the lower temperature range. (2) If the perfect ED plateau is detected, then it can be verified that the paleodose zeroing at the time of fault movement must be complete. (3) Executing the ED plateau test, we can obtain one of the following informations : i ) If the ED plateau is continuous from the initial temperature of TL measurements, then the estimated TL age is of the newest faulting. ii ) If the ED plateau is detected, being continuous in only the higher temperature range, then the estimated TL age is of the past faulting, iii) If the ED plateau cannot be detected in any temperature range at all, then it can be concluded that though the age of faulting cannot be estimated, the fault in question is active.
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