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首页> 外文期刊>Environmental Science & Technology >A 500 Year Sediment Lake Record of Anthropogenic and Natural Inputs to Windermere (English Lake District) Using Double-Spike Lead Isotopes, Radiochronoiogy, and Sediment Microanalysis
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A 500 Year Sediment Lake Record of Anthropogenic and Natural Inputs to Windermere (English Lake District) Using Double-Spike Lead Isotopes, Radiochronoiogy, and Sediment Microanalysis

机译：使用双尖峰铅同位素，放射性年代学和沉积物微量分析对温德米尔（英国湖区）进行人为和自然输入的500年沉积湖记录

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摘要

A high-resolution record of pollution is preserved in recent sediments from Windermere, the largest lake in the English Lake District Data derived from X-ray core scanning (validated against wavelength dispersive X- ray fluorescence), radiochronological techniques (~(210)Pb and ~(137)Cs) and ultrahigh precision, double-spike mass spectrometry for lead isotopes are combined to decipher the anthropogenic inputs to the lake. The sediment record suggests that while most element concentrations have been stable, there has been a significant increase in lead, zinc, and copper concentrations since the 1930s. Lead isotope down-core variations identify three major contributory sources of anthropogenic (industrial) lead, comprising gasoline lead, coal combustion lead (most likely source is coal-fired steam ships), and lead derived from Carboniferous Pb-Zn mineralization (mining activities). Periods of metal workings do not correlate with peaks in heavy metals due to the trapping efficiency of up-system lakes in the catchment. Heavy metal increases could be due to flood-induced metal inwash after the cessation of mining and the weathering of bedrock in the catchment. The combination of sediment analysis techniques used provides new insights into the pollutant depositional history of Windermere and could be similarly applied to other lake systems to determine the timing and scale of anthropogenic inputs.
机译：在英国湖区最大的温德米尔湖中，最近沉积物中保留了高分辨率的污染记录，数据来源于X射线核心扫描（经波长色散X射线荧光验证），放射年代学技术（〜（210）Pb） ，〜（137）Cs）和超高精密度双峰质谱法对铅同位素进行了组合，从而破译了该湖的人为输入。沉积物记录表明，尽管大多数元素浓度保持稳定，但自1930年代以来铅，锌和铜的浓度已显着增加。铅同位素的下核变化确定了人为（工业）铅的三个主要来源，包括汽油铅，燃煤铅（最有可能的来源是燃煤蒸汽船）和源自石炭化铅锌矿化的铅（采矿活动） 。由于集水区上游湖泊的捕集效率，金属加工的时间与重金属的峰值不相关。重金属的增加可能是由于采矿的停止和集水区基岩的风化后洪水引起的金属冲刷。所使用的沉积物分析技术的结合为温德米尔的污染物沉积历史提供了新的见解，并且可以类似地应用于其他湖泊系统，以确定人为输入的时间和规模。

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  • 来源
    《Environmental Science & Technology》 |2014年第13期|7254-7263|共10页
  • 作者

    Helen Miller; Ian W. Croudace; Jonathan M. Bull; Carol J. Cotterill; Justin K. Dix; Rex N. Taylor;

  • 作者单位

    Ocean and Earth Science, University of Southampton, National Oceanography Centre, European Way, Southampton, SO14 3ZH, U.K.;

    Ocean and Earth Science, University of Southampton, National Oceanography Centre, European Way, Southampton, SO14 3ZH, U.K.;

    Ocean and Earth Science, University of Southampton, National Oceanography Centre, European Way, Southampton, SO14 3ZH, U.K.;

    British Geological Survey, Murchison House, West Mains Road, Edinburgh, EH9 3LA, U.K.;

    Ocean and Earth Science, University of Southampton, National Oceanography Centre, European Way, Southampton, SO14 3ZH, U.K.;

    Ocean and Earth Science, University of Southampton, National Oceanography Centre, European Way, Southampton, SO14 3ZH, U.K.;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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