-- Sunstone Metals（ASX：STM）周二向澳大利亚证券交易所提交的文件显示，其位于厄瓜多尔的Bramaderos金铜项目的初步可行性研究显示，该项目初始矿山寿命为23年，前8年每年可生产13.5万盎司黄金当量。 该公司表示，该研究得出，在金价为每盎司3500美元的情况下，税后净现值为9亿美元，扣除各项抵免后，维持成本（AISC）平均为每盎司1499美元。 Sunstone Metals表示，该项目为传统的单露天矿，矿石将供应给一座年处理能力为1000万吨的选矿厂，矿山剥采比为1.4。在金价为每盎司3500美元的情况下，预计资本回收期为34个月；在现货价格下，预计资本回收期为19个月。 该公司表示，库存的显著增长潜力可能支撑二期扩建计划。
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