2005年3月，巴西矿业公司淡水河谷获得了一份开采合同，并开始为这家铁矿石公司提供可行性报告研究，因为环境原因这项工作很复杂。
In March 2005, Brazilian miner Vale secured an exploration contract and began work on feasibility studies for an iron ore mine — a complex undertaking due to environmental concerns.
它们常常在小行星上被发现，在那里，它们通过深入岩石的复杂根系分解矿石产生代谢变化。
They are most often found on asteroids, where they metabolize minerals through an intricate root system that taps into the rock.
大塘坡原生锰矿矿体形态和矿石结构较复杂，构造简单，属滨海盆地相沉积。
The shape of Datangpo primary manganese deposit and its ore structure are comparatively complex but the structure is simple which belongs to the sedimentary of littoral basin facies.
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