Geochemical characterization of solid media from three watersheds that transect the basal contact of the Duluth Complex, northeastern Minnesota

To document regional water quality in areas of potential base-metal mining, bedrock, soil, streambed sediment, and surface-water samples were collected and analyzed...为记录潜在贱金属（base-metal）采矿区域的区域水质状况，研究人员采集并分析了基岩、土壤、河床沉积物及地表水样品……