This paper reports the first results of a low-density geochemical survey covering the whole continental area of Portugal, taking both topsoils and active stream sediments as the sampling media. The data were obtained in a consistent way from 653 sites at a sampling density of 1 site/135 km(2). The samples were analysed for 31 elements by ICP-AES and after quality control the following 19 were selected: Al, As, Pa, Ca, Co, Cr, Cu, Fe, K, La, ME, Mn, Ni. PI Pb, Sr, Th, V and Zn. The baseline levels for these elements are presented. The first geochemical maps of Portugal were prepared and the geochemical patterns are generally well correlated to geological factors sometimes combined with anthropogenic influences. Some general trends can be observed between geochemical patterns and soils distribution. (C) 2001 Elsevier Science Ltd. All rights reserved. [References: 14]
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机译：本文报告了覆盖葡萄牙整个大陆地区的低密度地球化学调查的初步结果，该调查以表土和活性流沉积物为采样介质。数据以一致的方式从653个站点以1个站点/ 135 km（2）的采样密度获得。通过ICP-AES分析样品中的31种元素，并在质量控制后选择以下19种元素：Al，As，Pa，Ca，Co，Cr，Cu，Fe，K，La，ME，Mn，Ni。 PI Pb，Sr，Th，V和Zn。列出了这些元素的基线水平。准备了葡萄牙的第一批地球化学图，并且地球化学模式通常与有时与人为因素相结合的地质因素具有良好的相关性。在地球化学模式和土壤分布之间可以观察到一些一般趋势。 （C）2001 Elsevier ScienceLtd。保留所有权利。 [参考：14]
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