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Chuquicamata's pit reached over 1 km deep before Codelco began converting it to an underground mine — the largest such conversion ever attempted.
品位。 A century of mining exhausted the high-grade upper ore; the remaining resource is underground.
"品位"是指有用成分在矿石中所占的百分比。一座品位为0.5%的铜矿，每产出一吨铜就需丢弃199吨废石。这一个数字，决定了一个矿体究竟是可开采的矿山，还是仅具地质意义的有趣岩石。
产出内容
Copper
The reddish metal that carries electricity better than anything except silver, and which humans have been smelting…
Molybdenum
A silvery metal added to steel so it keeps its strength at high temperature and under pressure.
"副产品"是指因与主矿种赋存于同一岩体而被回收的金属，并非专门勘探的目标。因此，其供应量受主矿种经济性驱动，而非自身供需关系。
所有权归属
| 企业 | 角色 | 关注度 |
|---|---|---|
| Codelco | State miner | Owner-operator |
数据均为运营商公开披露。大型矿山的所有权时有变动；在引用前请以最新公司申报文件核实。