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首页> 外文期刊>Journal of Geochemical Exploration: Journal of the Association of Exploration Geochemists >The geochemical signature of rare-metal pegmatites in the Central Africa Region: Soils, plants, water and stream sediments in the Gatumba tin-tantalum mining district, Rwanda
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The geochemical signature of rare-metal pegmatites in the Central Africa Region: Soils, plants, water and stream sediments in the Gatumba tin-tantalum mining district, Rwanda

机译：中非地区稀有金属伟晶岩的地球化学特征：卢旺达Gatumba锡钽钽矿开采区的土壤，植物，水和溪流沉积物

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摘要

We studied trace elements in soils, plants, water and stream sediments in the Gisuma-Kibilira catchment of the Gatumba area of western Rwanda which has a long tradition of artisanal to small-scale tin-tantalum mining from rare-metal pegmatites. The geochemical fingerprint of soil, plant, water (springs and surface water in dry and rainy seasons) and stream sediment samples reveals elevated concentrations of Li, Rb, Cr, and Cs, but low As and U abundances at or below the global average. Trace element contents of soils and most plant materials are below internationally accepted guideline values. All water samplesanalyzed meet the World Health Organization (WHO) drinking water guidelines, and the stream sediments are below critical values of Dutch environmental standards. These data provide a baseline for environmental impact studies for rare-metal mining projects in the Central Africa Region.
机译：我们研究了卢旺达西部Gatumba地区Gisuma-Kibilira流域的土壤，植物，水和溪流沉积物中的微量元素，这在传统上一直是从稀有金属伟晶岩到小规模锡锡钽开采的传统。土壤，植物，水（干旱和雨季的泉水和地表水）和河流沉积物样品的地球化学指纹图显示，Li，Rb，Cr和Cs的浓度升高，但As和U的丰度低至或低于全球平均值。土壤和大多数植物材料中的微量元素含量低于国际公认的准则值。经过分析的所有水样均符合世界卫生组织（WHO）饮用水准则，溪流沉积物低于荷兰环境标准的临界值。这些数据为中非地区稀有金属采矿项目的环境影响研究提供了基准。

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