Historic metal mining inputs to Tees river sediment

被引:70
作者
HudsonEdwards, K
Macklin, M
Taylor, M
机构
[1] UNIV MANCHESTER,DEPT EARTH SCI,MANCHESTER M13 9PL,LANCS,ENGLAND
[2] UNIV LEEDS,SCH GEOG,LEEDS LS2 9JT,W YORKSHIRE,ENGLAND
基金
英国自然环境研究理事会;
关键词
contamination; metal mining; river sediment;
D O I
10.1016/S0048-9697(96)05381-8
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Historic metal mining has greatly influenced sediment delivery and metal contamination in the Tees River Basin. Investigations of metal-contaminated overbank river sediment show that sediment-borne metal concentrations decrease downstream of mining areas. Metalliferous mineralogy also changes: sulphides and carbonates are abundant in the upstream part of the basin, and both decline and disappear downstream where iron oxyhydroxides dominate. Mineral compositional and textural information can be used to trace sources of mining-related contaminated sediment. Sulphides, carbonates, and oxyhydroxides which pseudomorph ore deposit minerals, are interpreted to be derived from outcropping ore bodies and mine-waste tips. The relative abundance of these grains suggests that the ore bodies and mine-waste tips are still important sources of metal pollutants. This is corroborated by morphological mapping and coring of Tees floodplain sequences, which also suggests that metal-contaminated alluvium downstream has experienced limited re-working. (C) 1997 Elsevier Science B.V.
引用
收藏
页码:437 / 445
页数:9
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