摘要
Small Intrusions Forming Large Deposits is an important concept provided by Tong Zhong-li,the academician of China Engineering Academy,focusing on magmatic sulphide deposit.With studying,this theory has been accepted by academic world,and becoming a typical example of the combination of theory and practice while playing bigger and bigger role on prospecting.Recently,Mr.Tang summarized characteristics of small intrusion forming large deposit as 5 words: Samll,Broad,Large-Scale,High,Shallow(Latent).The paper introduced the characteristic condition of Small Intrusion Forming Deposit by which the features of some small intrusions in Gansu Province were compared.