Abstract:Mafic "intrusive rocks", distributed greatly within Dongchuan strata-hound copperfieldand really comprising volcanic，subvolcanic and volcano plutonic rocks，should he termed as volcanic-in-trusive complex (VIC). Geology and geochemistry of Jinningian VIC and its relation to Cu ores reaffirmthat VIC play an important role in mineralizations，which are oat only vein bonanzas deduced from  coose beds。but also new orehodies occurred within VIC. Bonanzas of superposing-reworking type and  orebodies of magmatic liquation-differentiation  type in the depth are suggested to be found in the largelydeveloping VIC area.

Key words: volcanic-intrusive complex   Jinningian period   superposing-reworking   Dongchuan Copperfield