GENESIS AND GOLD CONTENT OF MESOZOIC GRANITOID IN YINGKOU DISTRICT LIAONING PROVINCE

By studying the geology, petrology, petrochemistry and geochemistry of Mesozoic granitoids in Yingkou district, the authors believe the similarities.between Indosuiian granitoids in the studied district and I-type granite defined by Chappell and White,and between the Yanshanian granitoids and S-type granite in petrology.petrochemistry and geochemistry. The forming environment of ihe granitoids and its relationship with gold mineralization are discussed on the basis of the study of petrochemistry,Pb-isotope and gold content. The gold mineralization in this area is believed to be related to Indosinian granitic magmatism.