Environmental geochemistry of abandoned mercury mines in West-Central Nevada, USA
Environmental geochemistry of abandoned mercury mines in West-Central Nevada, USA
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DOI：
10.1016/s0883-2927(02)00004-5
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发表时间：
2002-08-01
影响因子：
3.4
通讯作者：
Fey, DL
中科院分区：
文献类型：
--
作者：
Gray, JE;Crock, JG;Fey, DL
洪堡河是一个封闭的流域，是内华达州最长的河流。许多废弃的汞矿位于该盆地内，由于汞是一种有毒的重金属，汞可能从这些汞矿迁移到周围的生态系统，包括洪堡河，这是一个环境问题。矿石，沉积物，水，煅烧（焙烧矿石），和浸出液的煅烧样品进行了分析，汞和其他重金属，以评估从矿山的地球化学分散。从矿区采集的含朱砂矿石样品中汞浓度极高，高达6.9%，而从矿区采集的煅烧物中汞浓度高达2000 mg/kg。在距离矿区1公里范围内采集的河流沉积物样本中汞含量高达170毫克/千克，而在远离矿区（>5公里）的地方采集的样本中汞含量则在距离洪堡河8公里处，汞在到达洪堡河之前通过大量的山前平原被迁移和稀释。(C)2002爱思唯尔科技有限公司版权所有。
The Humboldt River is a closed basin and is the longest river in Nevada. Numerous abandoned Hg mines are located within the basin, and because Hg is a toxic heavy metal, the potential transport of Hg from these mines into surrounding ecosystems, including the Humboldt River, is of environmental concern. Samples of ore, sediment, water, calcines (roasted ore), and leachates of the calcines were analyzed for Hg and other heavy metals to evaluate geochemical dispersion from the mines. Cinnabar-bearing ore samples collected from the mines contain highly elevated Hg concentrations, up to 6.9%, whereas calcines collected from the mines contain up to 2000 mg Hg/kg. Stream-sediment samples collected within 1 km of the mines contain as much as 170 mg Hg/kg, but those collected distal from the mines (>5 km) contain 8 km from the Humboldt River, and Hg is transported and diluted through a large volume of pediment before it reaches the Humboldt River. (C) 2002 Elsevier Science Ltd. All rights reserved.