磁铁矿交代黄铁矿
replacing pyrite with magnetite
攀枝花钒钛磁铁矿矿区
panzhihua v-ti magnetite mine
含铜黄铁矿矿床
cupriferous pyrite depusits
白马钒钛磁铁矿
Baima’s vanadium-bearing titanomagnetite
Baima vanadium bearing titanomagnetite
超贫磁铁矿
Ultra-low-grade magnetite
Nanzhao
ultra-poor magnetite
ultra poor magnetite