若把岩石圈下的上地漫局部熔融层的顶面视作等温面,可推算其温度为1500℃。熔融层的高温,很大程度上决定着地壳的断裂、褶皱、岩浆活动、升降运动和变质作用。 If the top of lithosphere above the local melting layer is regarded as isothermal surface, it can be estimated that the temperature is 1500 ℃. The melting layer of high temperature, to a large extent determines the crustal faults, folds, magmatic activity, movements and metamorphism.