Mathematical Geology

, Volume 28, Issue 4, pp 477–499 | Cite as

Quality mapping of the Ryytimaa dolomite in western Finland

  • Eevaliisa Laine


The Ryytimaa dolomite formation in western Finland is mined for fertilizing purposes in agriculture. Ordinary kriging, indicator kriging, and indicator principal components simulation were used to map the dolomite quality. The fertilizing properties depend on the relative amounts of MgO and neutralizing CaO in dolomite. Based on the chemical composition the dolomite is divided into six quality classes according to the Finnish legislation. This quality classification is only partially in accordance with the three populations inferred from the distributions of the MgO, CaO, and neutralizing CaO contents. These populations probably represent compositionally different dolomite layers, now forming complicated fold interference structures that are visible on the kriged maps. The mapping of the quality, and thus, selective mining of the dolomite deposit is possible using the quality classification based on the three populations. In contrast, selective mining of the dolomite based on the legislation is difficult—at least with techniques used in this study.

Key words

Fennoscandia kriging indicators indicator principal components simulation geostatistics 


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Copyright information

© International Association for Mathematical Geology 1996

Authors and Affiliations

  • Eevaliisa Laine
    • 1
  1. 1.Laboratory of Engineering Geology and GeophysicsHelsinki University of TechnologyEspooFinland

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