Abstract：
Thirty sediment samples from four different beaches along Bahia Solano and Nuquí (Department of Chocó) of eastern Colombia, with tourism and gold mining activities, were analysed to estimate the concentrations of fourteen different acid leachable metals. Metal distribution patterns showed elevated concentrations of Co, Cr, Cu, Pb and Zn compared with the upper continental crust values. Calculation of geochemical indices confirmed that the enrichment is due to periodic gold mining activities (severe to extremely severe enrichment of Cu, Zn, V, Co, Cr and Pb) along with natural (geological) contributions (minor and moderate enrichment of Ca, Mg, Fe, Ti, Mn and Li). Potential ecological risk index revealed that Pb posed the highest risk. Our results together with a global comparison suggest that the observed metal enrichments are mainly caused by mining and to a lesser extent by tourism in this region, thus instigating continuous monitoring of metal concentrations in this region.
摘要：
来自哥伦比亚东部BahiaSolano和Nuquí（乔科省）的四个不同海滩的30个沉积物样本，旅游和金矿开采活动，分析了14种不同的酸可浸出金属的浓度。金属分布模式显示Co浓度升高，Cr,Cu,Pb和Zn与上大陆地壳值比较。地球化学指数的计算证实，富集是由于周期性的金矿开采活动（Cu的严重至极严重富集，Zn,V,Co,Cr和Pb）以及自然（地质）贡献（Ca的轻度和中度富集，Mg,Fe,Ti,Mn和Li)。潜在生态风险指数显示，Pb的风险最高。我们的结果与全球比较表明，观察到的金属富集主要是由采矿引起的，在较小程度上是由该地区的旅游业引起的。从而促使该地区金属浓度的连续监测。
