S2: Water Rock Interaction (Special Session)

[S2P-05] Coupled model of TL decay kinetics and heat conduction model of thermoluminescence of feldspar

[Presentation award entry]

*Takahiro Sato¹, Nobuo Hirano¹, Noriyoshi Tsuchiya¹ (1. Tohoku Uni. Env.)

Keywords:Thermoluminescence, Grow Curve, Geothermal Exploration, Heat Conduction

In this study, a model for quantitative heat source estimation was investigated for the development of a geothermal exploration method using thermoluminescence (TL) of feldspar. In this model, the decay rate equation of TL intensity and the heat conduction equation are coupled. The decay rate equation consists of a decay term and an accumulation term, and the former describes the decay of TL due to isothermal heating as 2^nd and 3^rd order reaction rate equation. The latter term is a function of time. The lowest temperature at which the energy accumulation / decay of TL was switched was 21°C.