The evidences about the ore-forming mechanism for the Qingkuangshan Ni-Cu-PGE deposit in the Huili County from PGE and Re-Os isotope system

摘要

The Qingkuangshan Ni-Cu-PGE deposit,located in the Xiaoguanhe area of Huili County,Sichuan Province,is one of the typical Ni-Cu-PGE deposits in the Emeishan Large Igneous Province (ELIP).This paper will provide a systematic study on platinum-group elements and Re-Os isotope system for various rocks and ores in the intrusion,in aims to discuss the ore-forming machanism.Model analysis that the Qingkuangshan deposit had undergone two crustal contaminations and sulfide segregations in the development of the ore-bearing intrusion,and the intrusion represents volcanic feeders though which the basaltic magma flowed en route to the surface.