华北、东南及藏北地洼区的地壳运动及其地球物理特征

CRUSTAL MOVEMENTS AND THEIR GEOPHYSICAL FEATURES IN THE N.AND SE CHINA DIWA REGIONS AND NORTH TIBET DIWA REGION,CHINA

通过分析东南、华北及藏北三个地洼区的重力、地震、地热等深部和浅部地球物理资料所表现出来的不同特征及其存在的差异,论述了上述三个地洼区现阶段的大地构造运动中,东南地洼区地壳运动最弱,藏北地洼区地壳运动最强,华北地洼区的地壳运动强度居于前两者之间。研究表明,地壳运动的强弱变化与地幔有着密切联系。

The paper analyses the gravity,seismie,geothermal data from deep to shallow in the SE China, North China and North Tibet Diwa regions, and finds out their differences in geophysical features. The results indicate that among the three regions, the Southeast China has the weakest crustal movements, the North Tibet has the strongest crustal movements, an■ the North Chins is between the two in geotectonic movements. The variation in the intensity of crustal movements is closely related to the upper mantle.