弗兰博铜矿床在美国威斯康星州西北部莱迪史密斯以南一英里,为一块状硫化矿体,除含铜外,还有金和银。整个矿化带均可用地下采矿法开采,然而,已计划采用露天采矿法开采矿带的富集帽。此富集帽约有矿石200万短吨,其铜与金的含量分别占矿化带总含量的70％及30％。下部的铜品位为3～4％,采出矿石由铁路直接运往未设在矿 The Franco-copper deposit, a mile south of Ladysmith, northwestern Wisconsin, is a massive sulphide orebody that contains gold and silver in addition to copper. The entire mineralized zone can be mined using the underground mining method, however, the open-pit mining method has been planned to mine the enrichment cap. This enriched cap has about 2 million short tons of ore and its copper and gold contents account for 70% and 30% of the total mineralized zone, respectively. The lower part of the copper grade is 3 ~ 4%, the ore is directly transported by rail to mine