unmined meaning in English

已扫清水雷的未布雷的

There are plentiful mineral resources of nickel , cobalt , and copper in the northwest region of china , specially jinchuan superlarge copper - nickel sulflde magmatic deposit in gansu province , known for its large scale and typical metallogenetic feature in the world , is an important source of ni - cu metal mineral resource in our country . in contrast , jianchaling large cobalt - bearing nickel sulflde deposit in shannxi province is not famous and unmined , but many problems about the deposit are researched because of its special geologic settings and mineralization characteristic
我国西北地区有着丰富的镍、钴、铜等金属的矿产资源，尤其是甘肃省金川超大型铜镍硫化物岩浆矿床，以其超大规模及其典型的成矿特征而闻名于世，是我国重要的镍、铜金属矿产基地，而相比之下，陕西省煎茶岭大型镍(钴)矿床规模较小且未开采，但因其独特的地质背景和成矿特征而具有重要的研究意义。