摘要
Middle-Late Yanshanian metallogenetic granite is controlled by the structure and lithologic character together,which is tongue-like,apophyse-form at fault "rooting" place,to form the multi-level depression and Sn-Cu multimetallic deposit.It is the lowest ore-bearing level(900m)of Gejiu orefield.This is a breakthrough in deep ore prospecting,which has established the metallogenetic four models of deep advantageous place.