摘要
The formation and evolution of Songnen massif hasalways been a hot topic, and the presence of Precambrianbasement on the Songnen massif is still controversial： （1）Lacking of Pre-Paleozoic dating results, the Precambrianbasement on Songnen massif does not extend largelyaccording to the isotopic dating results of core frombasement, （2） the existence of gneiss from deep drill holesof the Songliao Basin makes some researchers considerthat Precambrian basement should exist on the Songnenmassif and another proof is that the geophysical featuresof gravity.
基金
financially supported by China Geological Survey (Grants12120113053900 and DD20160047)
