The key to date slipping of landslide by TL method is whether the temperature and pressure caused by slipping can lead the original TL to’zero’ for some minerals within the slipping band. For this purpose

the simulated experiments under different temperature- pressure were made and the TL annealing effect of landslide gouge was studied. The results show that the frictional heating caused during slipping is a main factor leading the mineral’s TL to decrease on the slip plane and that increment of temperature is in close relation with strength of shear stress

thickness of ladslide gouge and amount of displacement. As an example

the slipping age of a paleo- landslide at Huangtupo.Hubei Province

has been dated to be about 140 ka.