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Natural and anthropogenic impacts on the composition of lake sediments

Published online by Cambridge University Press:  05 July 2018

T. Eskola  and
V. Peuraniemi
T. Eskola*
Affiliation:
Institute of Geosciences, University of Oulu, P.O. Box 3000, 90014 University of Oulu, Finland
V. Peuraniemi
Affiliation:
Institute of Geosciences, University of Oulu, P.O. Box 3000, 90014 University of Oulu, Finland
*
*E-mail: tiina.eskola@oulu.fi
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Abstract

Lake sediments were studied from four lakes in environmentally different areas in northern Finland. Lakes Pyykösjärvi and Kuivasjärvi are situated near roads with heavy traffic and the city of Oulu. Lakes Martinlampi and Umpilampi are small lakes in a forest area with no immediate human impact nearby. The concentration of Pb increases in the upper parts of the sedimentary columns of Lake Kuivasjärvi and Lake Pyykösjärvi. This is interpreted as being an anthropogenic effect related to heavy traffic in the area and use of Lake Pyykösjärvi as an airport during World War II. High Ni and Zn concentrations in the Lake Umpilampi sediments are caused by weathered black schists. Sediments in Lake Martinlampi show high Pb and Zn contents with increasing Pb concentrations up through the sedimentary column. The sources of these elements are probably Pb-Zn mineralization in the bedrock, Pb-Zn-rich boulders and anomalous Pb and Zn contents in till in the catchment area of the lake.

Type
Research Article
Information
Mineralogical Magazine , Volume 72 , Issue 1 , February 2008 , pp. 411 - 413
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2008

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References

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