铜镍硫化物矿床成矿作用及成矿模式研究

铜镍硫化物矿床是典型的岩浆矿床。其成矿岩体是由上地幔的拉斑玄武岩浆在构造动力驱动下，沿深大断裂侵入形成的含矿铁质超基性岩、铁质基性一超基性杂岩和铁质基性岩体。主矿体通常赋存在这些岩体的中下部、底部或根部。主要成矿作用有岩浆熔离作用（包括岩浆就地熔离作用和岩浆深部熔离作用）和硫化作用。其成矿模式为“以岩浆深部熔离作用为主导的脉动式”成矿，形成由多种矿体（包括岩浆就地熔离型、岩浆深部溶离贯入型、晚期贯入型及交代型和岩浆熔离硫化叠加型）构成的复式矿床。

MINERALIZATION AND METALLOGENIC MODEL OF COPPER NICKEL SULPHIDE DEPOSITE

Cu Ni sulfide deposit is a typical magmatic ore deposit.The mineralized magma intrusions consist of ore bearing ferrous ultrabasic rocks,ferrous basic ultrabasic complex and ferrous basic magma intrusions intruded by tholeiitic magma in the upper mantle along deap seated faults.The major ore bodies usually occur in the middle lower part.bottom or roat of the intrusions.The main mineralizations are magmatic liquation,including magmatic liquation on the spot and magmatic liquation at dapth,and sulfide enrichment.The metallogenic model is pulsation type taking the magmatic liquation at depth as the major process,and forms complex deposits consisting of various style ore bodies as magmatic liquiation type on the spot,injection type by magmatic liquation at depth,injection and matasomatic type in late stage,and sulfide superimposed type by magmatic liquation