节点：上游（原材料/资源端）位置：上游情绪：利空参考度：4/10
巴西矿企淡水河谷周五发布公告称，依托地质勘探技术突破及新型矿石加工工艺落地，公司将伊塔比拉铁矿综合体预计闭坑年限由此前的2041年延长至2053年。
根据淡水河谷2025年20-F报告披露，该矿区核定矿产储量同比大增52%，总量升至Ǻ..
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