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首页> 外文期刊>Geochemistry: Exploration, Environment, Analysis >Vertical ionic migration: mechanisms, soil anomalies, and sampling depth for mineral exploration
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Vertical ionic migration: mechanisms, soil anomalies, and sampling depth for mineral exploration

机译：垂直离子迁移：矿物勘探的机理，土壤异常和采样深度

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Field studies, in particular mobile metal ion analysis of soil samples taken over mineralization, suggest that subtle geochemical anomalies exist above mineral deposits which are demonstrably covered by allochthonous material such as glacial till. Empirical observations suggest that the anomalies are preferentially located 10 to 25 cm below the soil interface, comprise elements contained in ore, and are located directly above the mineralizing source. Laboratory experiments suggest that capillary rise and evaporation play an important part in determining the position of emplacement of ions in the soil profile: in nature, root-zone transpiration also plays a part in solute deposition/adsorption within the evapo-transpiration zone. The effects of downward-percolating water after rainfall events, as well as the upward force of capillary rise, are considered in a model which explains many of the features of ion emplacement in soils. Laboratory modelling also suggests that convection, perhaps due to the heat produced by oxidation of the deposit, may in some cases provide a mechanism for rapid ascension of ions beneath the water table.
机译：现场研究，特别是对矿化过程中土壤 样品的移动金属离子分析表明，矿床上方存在细微的地球化学 异常，这些异常明显地被 发现由诸如冰盖等异质材料制成。经验 观测表明，异常区位于土壤界面以下 10至25 cm，包括矿石中包含 的元素，并且位于正上方 实验室实验表明，毛细管上升和蒸发 在确定离子在土壤剖面中的位置 方面起着重要作用：实际上，根区蒸腾作用 在 蒸发蒸腾作用区内的溶质沉积/吸附中也起作用。在解释许多 的模型中考虑了降雨事件后向下渗水的 的影响以及 毛细管上升的向上力。土壤中离子注入的特征实验室模拟 还表明，对流可能是由于沉积物氧化产生的热量，在某些情况下，可能提供快速提升的机制。地下水位以下的离子。

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