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首页> 外文期刊>Geochemistry: Exploration, Environment, Analysis >Mercury and antimony in soils and non-vascular plants near two past-producing mercury mines, British Columbia, Canada
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Mercury and antimony in soils and non-vascular plants near two past-producing mercury mines, British Columbia, Canada

机译：加拿大不列颠哥伦比亚省的两个过去生产的汞矿附近的土壤和非维管植物中的汞和锑

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摘要

Mercury and Sb in soils (humus, B horizon, C horizon) and environmental biomonitors (moss and epiphytic lichen) were examined near two past-producing Hg mines located in British Columbia, Canada: Pinchi Lake and Bralorne Takla mines. Sequential extraction analyses and scanning electron microscopy were used to determine the chemical associations of Hg and Sb and the mineralogical forms of Hg in soils. Mercury and Sb in the C horizon are derived mostly from natural sources because their concentrations are controlled by the bedrock geology, glacial transport, and sediment types. Distribution of Sb in the B horizon is similar to that of the C horizon suggesting a common geogenic source. Mercury in the B horizon at Pinchi Lake mine could be derived in part from anthropogenic sources, because (1) only at that site, and not at any other sites of cinnabar occurrences in bedrock, is there a labile Hg enrichment in the B compared to the C horizon, and (2) there is a weak correlation between non-labile Hg concentrations in the B horizon and distance from the mine which occurs independently of the natural concentrations of the C horizon. Mercury and Sb concentrations in humus near Pinchi Lake mine (<10 km) appear to be derived in part from anthropogenic sources because there are strong correlations between labile and non-labile Hg and Sb concentrations with distance from the mine which occurs independently of natural concentrations in the C horizon. Near Pinchi Lake mine, biogeochemical cycling and gaseous Hg derived from the substrate are thought to be minimal pathways and sources of Hg to the humus compared to anthropogenic sources, otherwise the strong Hg enrichment in the humus compared to the C horizon only observed near Pinchi Lake mine would also be present at several sites of cinnabar occurrences in bedrock along Pinchi Fault. Anthropogenic Hg and Sb enrichment in the soils near Bralorne Takla mine is indistinguishable from natural enrichment. Mercury and Sb levels in the sampled moss and lichen species reflect locally derived wind-borne soil and rock dust.
机译：在不列颠哥伦比亚省的两个过去生产汞的汞矿附近，研究了土壤（腐殖质，B层，C层）和环境 生物监测器（苔藓和附生地衣）中的汞和Sb ，加拿大： Pinchi湖和Bralorne Takla矿山。用序贯萃取法和扫描电镜分析法测定土壤中汞和锑的化学缔合以及汞的矿物学形态。 C层中的汞和Sb主要来自自然来源，因为它们的浓度受基岩地质，冰川运输和沉积物 类型的控制 。 B层中Sb的分布与C层中的 相似，表明是常见的成因来源。 Pinchi Lake矿山B层中的汞 可能部分来自人为来源 ，因为（1）仅在该位置， 在基岩中任何其他发生朱砂的地点， 与C层相比，B中Hg的富集度不稳定， ，并且（2） B层中不稳定的Hg浓度 和距矿山的距离，独立于C层自然浓度 发生。品池湖矿山（<10 km） 附近腐殖质中的汞和 Sb浓度似乎部分源自人为源，因为 存在很强的相关性不稳定的和不稳定的 Hg和Sb浓度与距矿山的距离之间的关系，独立于C层中的自然浓度而发生 。相较于 Pinchi Lake矿山，生物地球化学循环和源自底物的气态Hg被认为是汞到腐殖质的最小途径和来源。人为来源，否则 腐殖质中的汞富集比仅在品池湖矿山附近观察到的C层 Pinchi 断裂沿基岩中朱砂的发生规律布拉罗恩塔克拉矿附近的土壤中人为汞和锑的富集与自然富集是没有区别的。苔藓和地衣样本中汞和锑的含量 反映从本地获取的风传播的土壤和岩石尘埃。

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