黑龙江鸡东五星铂钯铜镍矿床的铂钯元素赋存规律

Occurrence regularity of Pt-Pd in Wuxing Pt-Pd-Cu-Ni Deposit in Jidong County,Heilongjiang Province

五星铂钯铜镍矿床位于敦密断裂南东侧的兴凯地体内,矿床内不仅含有铜镍钴矿体,同时含有贵金属铂钯矿体。通过对铂钯元素在岩石、矿石及矿体中的物相分配、赋存规律的研究,发现矿体中贵金属钯铂主要以2种形式赋存,即矿物相及类质同像,且类质同像又分为硫化物中的类质同像、造岩矿物及氧化物中的类质同像。研究表明,钯铂主要以矿物相存在,硫化物中的类质同像次之,造岩矿物及氧化物中类质同像的赋存形式较少。

Wuxing Pt-Pd-Cu-Ni Deposit is located in Xingkai Terrane which lies in the southeastern part of the Dunhua-Mishan Fault. The deposit contains not only Cu-Ni-Co ore bodies but also Pt-Pd. This paper mainly discussed the physical distribution and occurrence regularities of Pt-Pd elements in the rocks, ores and ore bodies. The precious metal elements Pt-Pd have two manners of existence i. e. mineral facies and isomorphism that further divides to isomorphism in metal sulfide, and isomorphism in rock-forming minerals and oxides. And studies show that the Pt-Pd elements mainly exist in the form of mineral facies, secondarily isomorphism in metal sulfide, and least likely in the form of isomorphism in rock-forming minerals and oxides.