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首页> 外文期刊>Science of the total environment >New soil composition data for Europe and Australia: Demonstrating comparability,identifying continental-scale processes and learning lessons for global geochemical mapping
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New soil composition data for Europe and Australia: Demonstrating comparability,identifying continental-scale processes and learning lessons for global geochemical mapping

机译：欧洲和澳大利亚的新土壤成分数据：论证可比性，确定大陆规模的过程并学习全球地球化学制图的经验教训

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New geochemical data from two continental-scale soil surveys in Europe and Australia are compared. Internal project standards were exchanged to assess comparability of analytical results. The total concentration of 26 oxides/ elements (Al_2O_3, As, Ba, CaO, Ce, Co, Cr, Fe_2O_3, Ga, K_2O, MgO, MnO, Na_2O, Nb, Ni, P_2O_5, Pb, Rb, SiO_2, Sr, Th, TiO_2, V, Y, Zn, and Zr), Loss On Ignition (LOI) and pH are demonstrated to be comparable. Additionally, directly comparable data for 14 elements in an aqua regia extraction (Ag, As, Bi, Cd, Ce, Co, Cs, Cu, Fe, La, Li, Mn, Mo, and Pb) are provided for both continents. Median soil compositions are close, though generally Australian soils are depleted in all elements with the exception of SiO_2 and Zr. This is interpreted to reflect the generally longer and, in places, more intense weathering in Australia. Calculation of the Chemical Index of Alteration (CIA) gives a median value of 72% for Australia compared to 60% for Europe. Element concentrations vary over 3 (and up to 5) orders of magnitude. Several elements (total As and Ni; aqua regia As, Co, Bi, Li, Pb) have a lower element concentration by a factor of 2-3 in the soils of northern Europe compared to southern Europe. The break in concentration coincides with the maximum extent of the last glaciation. The younger soils of northern Europe are more similar to the Australian soils than the older soils from southern Europe. In Australia, the central region with especially high SiO_2 concentrations is commonly depleted in many elements. The new data define the natural background variation for two continents on both hemispheres based on real data. Judging from the experience of these two continental surveys, it can be concluded that analytical quality is the key requirement for the success of global geochemical mapping.
机译：比较了来自欧洲和澳大利亚的两次大陆规模土壤调查的新地球化学数据。内部项目标准被交换以评估分析结果的可比性。 26种氧化物/元素的总浓度（Al_2O_3，As，Ba，CaO，Ce，Co，Cr，Fe_2O_3，Ga，K_2O，MgO，MnO，Na_2O，Nb，Ni，P_2O_5，Pb，Rb，SiO_2，Sr，Th ，TiO_2，V，Y，Zn和Zr），灼烧损失（LOI）和pH值可比。此外，还提供了两个大陆的王水提取物中14种元素（Ag，As，Bi，Cd，Ce，Co，Cs，Cu，Fe，La，Li，Mn，Mo和Pb）的直接可比数据。土壤成分中位数接近，尽管通常澳大利亚土壤中除SiO_2和Zr以外的所有元素均被消耗。这被解释为反映了澳大利亚一般更长的时间，在某些地方，更强烈的天气。根据化学变化指数（CIA）的计算，澳大利亚的中位数值为72％，而欧洲为60％。元素浓度变化超过3个（最多5个）数量级。与北欧相比，北欧土壤中的几种元素（总砷和镍；王水砷，钴，铋，锂，铅）的元素浓度降低了2-3倍。浓度的下降与最后一次冰川作用的最大程度相吻合。北欧的年轻土壤比澳大利亚南部的土壤更像澳大利亚的土壤。在澳大利亚，SiO_2浓度特别高的中部地区通常会耗尽许多元素。新数据根据实际数据定义了两个半球上两个大陆的自然本底变化。从这两个大陆调查的经验来看，可以得出结论，分析质量是全球地球化学测绘成功的关键要求。

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