Rapid accumulation of anhydrite by the blowing of wind to form thick and large ore body played a certain role.

风的吹拂作用对硬石膏快速堆积厚大矿体起了一定作用。

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The super - large ore deposit is several times larger than the large one in reserves and commonly characterized by multiple kinds of minerals and point - type distribution.

超大型矿床的储量若干倍于大型矿床，并常常具有多矿种及“点型”分布的特点。

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And tailings are produced in large quantities: on average, 991 tonnes-worth for every 1, 000 tonnes of ore that is mined.

ECONOMIST: Mine pollution