The northern part of "Kang-Dian Axis" is situated in the western margin of the Yangzi platform. Here are distributed S type granite of the Jinning- Chengjiang period and I type granite of the Lndosinian-Yenshan period. The S type granite is located within the Yangzi platform. It associated closely with rhyolite and is related to tine and tungstun ores. The I type granite occurs in the transitional belt of the trough and stage. It is associated with the gabbro, Emei mount basalt and syenite, and is related to the deposit of rare-earth, niobium and tantalum.