THE FORM AND THREE-INSTANTANEOUS INFORMATION OF THE SEISMIC REFLECTION MOHO IN SONGLIAO BASIN AND GEOLOGICAL INTERPRETATION
松辽盆地反射地震莫霍面的形态、三瞬处理结果及其地质解释

The development of studies on Moho using near-vertical seismic reflection in recent years is introduced. We processed and interpreted 1300km-length near-vertical seismic reflection data, and obtained some characteristics of Moho depth in Songliao basin. An important characteristic is a 32km-depth fathom line along Yian-Daqing-East Daan. On the west of the fathom line the depth of Moho is bigger than the east side. We pick up the instantaneous information of Moho phase in typical segment of the profile. The results indicate that the three-instantaneous information can improve the interpretation on characteristics of Moho using the original section. We discuss the problems on the mechanism of formation of Moho and the relation between Moho and the basin.