Abstract Multi-elemental analysis of high-density (regional-scale) geochemical surveys is an important strategy for multi-purpose applications, particularly in addressing geochemical background concentrations in different sampling media. This approach was applied to the Itacaiunas River Watershed (IRW), which is situated in the most prominent mining area of Brazil, the Carajas Mineral Province. Microcatchment-based mapping (~50 km2 each) covering the whole extent of IRW was delimited using remote sensing techniques and targeted for sampling. A total of 788 samples, including 27 duplicates, were collected in 2017. The

中文翻译：

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Carajás 矿产省河流沉积物中的地球化学绘图：巴西 Itacaiúnas 河流域的背景值

摘要 高密度（区域尺度）地球化学调查的多元素分析是多用途应用的重要策略，特别是在解决不同采样介质中的地球化学背景浓度方面。这种方法应用于伊塔卡伊纳斯河流域 (IRW)，该流域位于巴西最著名的矿区卡拉哈斯矿产省。覆盖 IRW 整个范围的基于微集水区的制图（每个约 50 平方公里）使用遥感技术进行划定并有针对性地进行采样。2017 年共收集样品 788 个，包括 27 个重复样品。