Mining giants BHP Billiton (NYSE: BHP; LSE: BLT) and Vale (NYSE: VALE) haven't offered much detail about a large-scale tailings dam breach at the Samarco iron ore joint venture in Brazil's Minas Gerais state, but reports already show it could be one of the largest-ever mining-related disasters in terms of area of impact.
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机译：矿业巨头BHP Billiton（纽约证券交易所代码：BHP; LSE：BLT）和Vale（纽约证券交易所股票圈）尚未在巴西的Samarco Iron Ore合资企业的大型尾矿坝违约中提供了很多细节，但已经报道了 表明它可能是在撞击区域方面最大的与矿业有关的灾害之一。
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