Abstract: Rechang Copper-gold Deposit is the first newly discovered porphyry type deposit in the eastern section of the
Bangong Lake Nujiang metallogenic belt. On the basis of 1∶10 000 geological mapping,1∶5 000 soil measurement,remote sensing
interpretation,and special mapping of alteration,induced polarization depth measurement,trenching,drilling and other survey
work,the geological background,orebody characteristics,ore characteristics,geochemical characteristics,and surrounding
rock alteration characteristics of the deposit were systematically analyzed to clarify its resource potential. The results show that:
① Rechang Copper-gold Deposit is a complex porphyry mineralization system,and the polymetallic mineralization is jointly
controlled by the hidden granite porphyry body containing hornblende black clouds+granite porphyry and the surrounding rock
contact zone+NWW trending fault fracture zone;② The genesis type of the deposit is porphyry shallow low-temperature hydrothermal
type,which has the typical central surface alteration characteristics centered on the rock mass of porphyry type deposits;
③ The granite porphyry outcrop area in the western part of the Rechang mining area has superior geological,geochemical,
and remote sensing comprehensive mineralization conditions,and should be the key target area for the next exploration work;④
By analogy with the main alteration parameters of the adjacent Yulong Copper Mine and combining multidimensional analysis of
the degree of erosion in the mining area and the mineralization intensity in the deep boreholes,it is believed that the Rechang
Deposit has the potential for large-scale copper gold mineralization.

Key words: Rechang Copper-gold Deposit,porphyry deposit,geological characteristics,metallogenic potential