Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.gexplo.2012.02.008 |
Abandoned tailings deposits, acid drainage and alluvial sediments geochemistry, in the arid Elqui River Basin, North-Central Chile | |
Oyarzun, Jorge1; Castillo, Daniela1; Maturana, Hugo1; Kretschmer, Nicole2; Soto, Guido3; Amezaga, Jaime M.4; Roetting, Tobias S.4; Younger, Paul L.5; Oyarzun, Ricardo1,2 | |
通讯作者 | Oyarzun, Ricardo |
来源期刊 | JOURNAL OF GEOCHEMICAL EXPLORATION
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ISSN | 0375-6742 |
EISSN | 1879-1689 |
出版年 | 2012 |
卷号 | 115页码:47-58 |
英文摘要 | Two major pollutant sources related to hydrothermal ore deposits and mining operations exist in the Elqui river basin, Chile: (a) add drainage from Andean epithermal El Indio Au-Ag-Cu-As district and nearby hydrothermal alteration zones, and (b) diffuse sediment dispersion from abandoned tailings deposits in usually dry creeks in the western belt of the basin. This work analyses the contribution of both sources to the current metal contents of the fine grained sediments of the rivers and creeks of the Elqui basin, including a group of chemical elements and data analysis techniques not considered in previous works carried out in the area. Analysis of "active sediments" (i.e., sediments in permanent contact with surface water) in the main channel and tributaries of the Elqui river reveals that both pollutant sources contribute to their exceptionally high Cu contents (between 0.1 and 0.2% in the minus 60 mesh fraction). However, As pollution (0.03%) is mainly derived from the El Indio district. Potentially toxic heavy metals (notably Cd, Pb, Hg and Mo) are present in low concentrations and do not represent major threats to ecology or human health. Nevertheless, ongoing erosion of abandoned tailings deposits may result in soil contamination and thus be detrimental to the export-oriented agriculture of the Elqui basin. Consequently, remediation of that source should be prioritized. (C) 2012 Elsevier B.V. All rights reserved. |
英文关键词 | Acid drainage Active sediments Hydrothermal alteration Tailings CAMINAR |
类型 | Article |
语种 | 英语 |
国家 | Chile ; England |
收录类别 | SCI-E |
WOS记录号 | WOS:000304026500005 |
WOS关键词 | WATER CHEMISTRY DATA ; STREAM SEDIMENTS ; CLASSIFICATION ; SECTOR ; COPPER ; ANDES |
WOS类目 | Geochemistry & Geophysics |
WOS研究方向 | Geochemistry & Geophysics |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/173563 |
作者单位 | 1.Univ La Serena, Dept Ingn Minas, La Serena, Chile; 2.Univ La Serena, CEAZA, La Serena, Chile; 3.Ctr Agua Zonas Aridas & Semiaridas Amer Latina &, La Serena, Chile; 4.Newcastle Univ, Sch Civil Engn & Geosci, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England; 5.Newcastle Univ, Newcastle Inst Res Sustainabil, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England |
推荐引用方式 GB/T 7714 | Oyarzun, Jorge,Castillo, Daniela,Maturana, Hugo,et al. Abandoned tailings deposits, acid drainage and alluvial sediments geochemistry, in the arid Elqui River Basin, North-Central Chile[J],2012,115:47-58. |
APA | Oyarzun, Jorge.,Castillo, Daniela.,Maturana, Hugo.,Kretschmer, Nicole.,Soto, Guido.,...&Oyarzun, Ricardo.(2012).Abandoned tailings deposits, acid drainage and alluvial sediments geochemistry, in the arid Elqui River Basin, North-Central Chile.JOURNAL OF GEOCHEMICAL EXPLORATION,115,47-58. |
MLA | Oyarzun, Jorge,et al."Abandoned tailings deposits, acid drainage and alluvial sediments geochemistry, in the arid Elqui River Basin, North-Central Chile".JOURNAL OF GEOCHEMICAL EXPLORATION 115(2012):47-58. |
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