1. School of Earth Science, Lanzhou University, Lanzhou 730000, China;
2. College of Earth Science and Resource Management, Chang'an University, Xi'an 710054, China

The Jinchuan deposit understandings of the sulfide ore genesis and the magma intrusion and emplacement history of it remains limited.On the basis of the spatial relationships and the geochemistry of magmatic sulfide ores,this paper suggests that the Jinchuan deposit was affected obviously by tectonization and hydrothermal alterations,and that the massive ores are relatively enriched in Os,Ir,Ru,Rh comparing with other ore-forming elements,whereas Pt-Pd-rich sulfide ores are relatively rich of Pt,Pd,Au,Cu.It is concluded that platinum group minerals(PGMs)are the relic liquid of monosulfide solid solution segregation,and that the massive ore represents the accumulation of monosulfide solid solution,and that the late stage of pure sulfide liquid injection evolves both massive ore and PGM.The ore bodies underwent hydrothermal and tectonic-hydrothermal alterations,thus Pt,Pd,Cu,Au are concentrated in Pt-Pd-rich sulfide ores which have deposited in the certain restricted localities.It is concluded that the Jinchuan deposit was formed as a result of primary magmatic crystallization followed by hydrothermal remobilization,transport,and deposition of PGE.Based on special relationships of massive ores and Pt-Pdrich zones,we expect that the prospect of seeking new ore bodies in deep and border fractures in the footwalls of orebody-2and orebody-24appears to be justified.