Geochemical maps of Finland and Sweden

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doi: 10.1016/0375-6742(94)90015-9
Authors:Gustavsson, N.; Lampio, E.; Nilsson, B.; Norblad, G.; Ros, F.; Salminen, R.
Author Affiliations:Primary:
Geological Survey of Finland, Espoo, Finland
Other:
Swedish Environmental and Exploration Co., Sweden
Swedish National Board for Industrial and Technical Development, Sweden
Volume Title:Journal of Geochemical Exploration
Source:Journal of Geochemical Exploration, 51(2), p.143-160. Publisher: Elsevier, Amsterdam-New York, International. ISSN: 0375-6742
Publication Date:1994
Note:In English. 24 refs.; illus., incl. geol. sketch maps
Summary:Regional geochemical mapping programmes were carried out independently in Finland and Sweden during the 1980s. The field methods and analytical procedures used in the two countries were very similar, which allows analytical data representing a total of 83400 glacial till samples covering an area of 470 000 km2 to be compiled. The results for 14 elements (Al, Au, Ba, Ca, Co, Cu, Fe, K, Mg, Mn, Ni, P, Ti, and Zn) after aqua regia leaching are discussed and shaded contoured maps using map production methods developed at the Geological Survey of Finland are presented for Au, Ba, Cu, K, Ni, P and Zn. The compilation shows that combining two independently created geochemical data sets is not without problems, in spite of the fact that the same kind of field and laboratory methods were applied. It was not possible to use all of the elements analyzed in the map compilation because of differences in background level abundances resulting from very small differences in analytical procedures. The map of the combined area (470000 km2) makes large distribution patterns specific for this scale of study easier to understand. The concept of geochemical structure is adopted, because geochemical distribution patterns tend to reflect primarly tectonic features in the bedrock. These maps can, in cojunction with maps containing other forms of geodata, be used in exploration programmes. In the interpretation of maps more attention is given to the correlation between bedrock structural features and overall geochemical distribution patterns rather than to regional trends for individual elements.
Subjects:Copper ores; Geochemical maps; Geochemical methods; Geochemistry; Gold ores; Lead-zinc deposits; Mapping; Maps; Metal ores; Mineral exploration; Mineral resources; Nickel ores; Sampling; Stratabound deposits; Europe; Finland; Scandinavia; Sweden; Western Europe; Outokumpu-type
Abstract Numbers:95M/712
Record ID:1995032848
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands
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