The emplacement of porphyritic intrusions and Cu-Au mineralization took place within a short period (120 ~ 117 Ma) at Duolong.
The generation of porphyritic intrusions was caused by a mixing of mantle-derived melts and crust-derived melts.
The generation of copper–gold mineralization was related to magma chambers of lower crystallization temperatures and pressures.
Magnetite might be a exploration tool due to the variation of Ti and V contents in the barren and mineralized intrusions.