Abstract: For the MDD model the activation energy determination has remarkable influence upon the cooling temperature curve of which the value is about 7～8℃/kcal·mol^-1. But it does not change the shape of the cooling curve.The affecting factors of low value by activation energy determination include heating duration in low temperature stage, pureness of K-feldspar and mixture of some plagioclase, quartz et al.

Key words: Thermal history, Geological age determination, Activation energy MDD model

摘要： 活化能取值在MDD模式中对冷却曲线的温度有较大的影响,其影响度大约为7～8℃/kcal·mol^-1,但它并不改变冷却曲线的形状。导致活化能取值偏低的影响因素包括低温阶段的加热时间、K-长石的纯度和部分斜长石、石英的混入等。

关键词: 热历史, 地质年代测定, 活化能, MDD模式