PRELIMINARY STUDY ON THE ACCESSORY MINERALS IN GRANITOIDS IN EASTERN JILIN AND HEILONGJIANG PROVINCES

The accessory minerals in granitoids in the east of Jilin and Heilongjiang Provinces are various in types. Among them zircon, apatite and sphene are broadly distributed. Their characters distinguish themselves in different types of granites. The color, crystal forms and group types of zircons, the REE distribution models and Sri values of apatites, as well as the generations and origins of sphenes are helpful to identify the forming conditions of granites with different origins. Thus the typomorphic characteristics can be subsidiary signs to distinguish and classify the genesis of granites.