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Analysis of geochemical data for mineral exploration using a GIS—A case study from the Swayze greenstone belt, northern Ontario, Canada

By
J. R. Harris
J. R. Harris
Geological Survey of Canada, 615 Booth Street, Ottawa, Ontario K1A 0E9, Canada (e-mail:harris@gis.nrcan.gc. ca)
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;
L. Wilkinson
L. Wilkinson
Geological Survey of Canada, 615 Booth Street, Ottawa, Ontario K1A 0E9, Canada (e-mail:harris@gis.nrcan.gc. ca)
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;
M. Bernier
M. Bernier
Asquith Resources, Toronto, Canada
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Published:
January 01, 2001

Abstract

Geographic Information Systems (GIS) provide the geologist with a powerful tool, when used in concert with statistical and geostatistical analysis, for archiving, manipulating, analysing and visualizing geochemical data. This paper uses geochemical (Zn, Cu) data obtained from various media (rock, lake sediments, till, soil and humus) over the Swayze greenstone belt in northern Ontario, to explore methods for analysing and visualizing geochemical data with a focus to mineral exploration applications.

The behaviour of Zn and Cu in both bedrock and the surficial environment is studied using statistical and geostatistical techniques. Interpretation and uses of traditional statistics and dot plots are contrasted with interpolated geochemical maps as well as red-green-blue (RGB) ternary maps. Techniques for multimedia comparison and geochemical anomaly detection and screening are presented. The processing methods presented in this paper can be utilized and adapted by other geologists for exploring their own geochemical data. Many of the algorithms presented here are available within standard GIS software packages, or can be written easily using a GIS macro language.

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Contents

Geological Society, London, Special Publications

Drift Exploration in Glaciated Terrain

M. B. McClenaghan
M. B. McClenaghan
Geological Survey of Canada, Canada
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;
P. T. Bobrowsky
P. T. Bobrowsky
British Columbia Geological Survey, Canada
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;
G. E. M. Hall
G. E. M. Hall
Geological Survey of Canada, Canada
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;
S. J. Cook
S. J. Cook
Hudson Bay Exploration and Development Co. Ltd., Canada
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Geological Society of London
Volume
185
ISBN electronic:
9781862394339
Publication date:
January 01, 2001

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