Geochemical mapping of stream waters and sediments in Finland; selected results

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Authors:Lahermo, P.; Salminen, R.; Tarvainen, T.; Vaananen, P.
Author Affiliations:Primary:
Geological Survey of Finland, Espoo, Finland
Volume Title:Geological Survey of Finland, current research 1993-1994
Volume Authors:Autio, Sini, editor
Source:Geological Survey of Finland, current research 1993-1994, edited by Sini Autio. Special Paper - Geological Survey of Finland, Vol.20, p.155-166. Publisher: Geologian Tutkimuskeskus, Espoo, Finland. ISSN: 0782-8535. ISBN: 951-690-585-4
Publication Date:1995
Note:In English
Summary:A total of 1167 sites were sampled for water and stream sediments at a mean sampling density of one sample/300 km2. Peatlands and cultivated fields have a strong influence on the contents of Mn, Zn, Cu, Ni and As; humus acts as a complexing carrier for metals such as Al, Fe, Mn, Cu and Cr. A reciprocal partitioning was found for many metals between the stream waters and the stream sediments, i.e. if the concentrations are low in the stream sediments they are high in the stream waters, and vice versa. This is explained by the prevailing redox conditions in water-sediment systems and the abundance of complexing agents in water (e.g. humic substances). In catchments composed of arable land Cr seems to be trapped in clay-rich stream sediments although Cr concentrations in the water are small; in boggy catchment areas most of the Cr is in the water and it is low in the sediments. [R.A.H.]
Subjects:Chemical composition; Geochemistry; Metals; Stream sediments; Surface water; Trace elements; Europe; Finland; Scandinavia; Western Europe
Abstract Numbers:96M/2003
Record ID:1995068742
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom, Reference includes data from FINGEO, Geological Survey of Finland
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