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Aruba - a geochemical baseline study

Published online by Cambridge University Press:  01 April 2016

F. van den Oever
F. van den Oever*
Affiliation:
TAUW, Australiëlaan 5, P.O. Box 3015, 3502 GA UTRECHT, the Netherlands; e-mail: for@tauw.nl
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Abstract

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A stream-sediment survey was carried out for the island of Aruba. Concentrations in stream sediments represent the abundance of chemical elements in the drainage basins. A geochemical atlas was created from the collected data and natural background values were established. Cluster analysis and pattern recognition techniques were used to gain a better understanding of the data set.

Two cluster models were selected to study the various geochemical controls on the sediments and to establish a spatial basis of environmental-quality settings for the development of future environmental policies. The first cluster model was suitable to recognise in some detail the reflection of the geology on the geochemistry of the stream sediments. The second, coarser cluster model stressed the importance to distinguish between the two main lithological units of the island when instituting natural background values. Not one uniform value per element is valid, but the value depends on the lithology.

Keywords

background valuesenvironmentgeochemical mappingthreshold values
Type
Research Article
Information
Netherlands Journal of Geosciences , Volume 79 , Special Issue 4: Geochemical mapping in the Kingdom of the Netherlands , December 2000 , pp. 467 - 477
Copyright
Copyright © Stichting Netherlands Journal of Geosciences 2000

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