加拿大西北地方埃寇贝(Echo Bay)矿山的脉状铀-镍-银-铜矿床是赋存在沿北东-南西向裂隙带内古老的安山质凝灰岩中,凝灰岩的同位素年龄值为1,800百万年。 埃寇贝矿山矿脉内的矿化阶段可分为:1)石英-赤铁矿阶段;2)沥青铀矿阶段;3)钻-镍砷化物与自然银、铋阶段;4)早期硫银矿阶段;5)主要硫化物和白云石阶段(在这一阶段,硫银矿、黄铜 The vein-shaped uranium-nickel-silver-copper deposits in the Echo Bay mine in northwestern Canada are found in the ancient andesite tuffs along the NE-NS fractures with an isotopic age value of 1,800 Millions of years. The mineralization stages in the Ekube mine can be divided into: 1) quartz-hematite stage; 2) bitumen uranium stage; 3) drilling - nickel arsenide and natural silver, bismuth stage; 4) Stage; 5) The main sulphide and dolomite stages (at this stage, silver sulfide, brass