Mercury contamination of active channel sediment and floodplain deposits from historic gold mining at Gold Hill, North Carolina, USA
Mercury contamination of active channel sediment and floodplain deposits from historic gold mining at Gold Hill, North Carolina, USA
复制标题
美国北卡罗来纳州金山历史金矿开采活动河道沉积物和洪泛区沉积物的汞污染
DOI：
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
G. Schlomer
中科院分区：
文献类型：
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作者：
S. Lecce;R. Pavlowsky;G. Schlomer
对美国北卡罗来纳州历史上开采黄金相关的汞污染进行的一项侦察调查发现，在金山矿区下游的河道和泛滥平原沉积物中汞含量很高。该地区采矿活动最激烈的时期发生在19世纪40年代和50年代，当时人们使用汞齐从磨矿中回收细小的金粒。本文评估了从荷兰水牛河下游的历史洪泛平原沉积物中回收的两个岩芯和活动河道沉积物中测得的汞浓度。这些岩芯中的汞浓度从0.01到2.2毫克/公斤不等，最高浓度超过背景水平的35倍。较晚的铜浓度峰值与1899年至1906年间一座大型铜矿的运营有关。在最密集的采矿阶段之后，汞和铜的浓度都下降到大约两倍于开采前本底浓度的恒定水平。结果表明，汞和其他痕量金属的垂直趋势为解释北卡罗来纳州山前历史上洪泛平原的沉积速率提供了有用的工具。
A reconnaissance investigation of mercury contamination associated with historic gold mining in North Carolina, USA, revealed high concentrations of mercury in channel and floodplain sediments downstream from the Gold Hill mining district. The most intense period of mining activities in this region occurred in the 1840s and 1850s when mercury amalgamation was used to recover fine gold particles from milled ore. This paper evaluates mercury concentrations measured in active channel sediments and two cores recovered from historic floodplain deposits of the lower portion of Dutch Buffalo Creek. Mercury concentrations in these cores range from 0.01 to 2.2 mg/kg, with maximum concentrations more than 35 times background levels. A later peak in copper concentrations is associated with the operation of a large copper mine between 1899 and 1906. Following the most intense periods of mining, both mercury and copper concentrations decrease upcore to constant levels of about twice pre-mining background concentrations. Results suggest that vertical trends in mercury and other trace metals provide a useful tool for interpreting rates of historic floodplain sedimentation in the Piedmont of North Carolina.
影响因子：
10.4
作者：
Clarkson TW
通讯作者：
Clarkson TW