In recent years, there more different types mo deposits (spots) have been discovered in Jilin geosynclinal area, mainly porphyry, quartz vein, skarn and fracture altered rock deposits.

Furtherly are discussed geological condition under which skarn - porphyritic molybdenum ore deposit are formed, alterations in wall rocks and the genesis of the Mo-deposit.

Nannihu molybdenum mine field is the important component part of the East Qinling-dabie mountain ore forming belt, in which the ore-forming material occurrence state of s…