利用重力资料研究我国东部地区地壳深部构造和地壳结构特征

THE INVESTIGATION OF DEEP CRUSTAL STRUCTURE AND CRUSTAL CONSTRUCTION OF THE EASTERN PART OF CHINA WITH GRAVITY DATA

为分析研究我国东部地区地壳深部构造的特征及地壳结构的特点,我们利用该区百万分之一的布格重力异常图,以少数地震测深点提供的莫霍深度作控制,计算并绘制了全区的莫霍等深线图及地壳深部构造格架图。对所编的地壳深部构造格架图的初步分析表明,它较好地反映了我国东部地区深部构造的基本轮廓。此外,文中还探讨了华南和华北地壳结构和深部构造之间某些不同的特点。

In order to investigate characteristics of deep crustal structure and crustal construction of the eastern part of China, contour map of Moho depth and structural framework map of deep crust were compiled. Moho depths were calculated by use of gravity Bouguer anomaly map on the scale of 1 :l ,000,000,and controlled by some results of deep seismic sounding. Initial analysis of these results shows that they reflect basic outline of deep structure of the eastern part of China relatively well. Besides, some different characters of crustal construction and deep structure between the south China and north China were discussed.