Mathematical Geology

, Volume 18, Issue 8, pp 823–843 | Cite as

Evaluation of geochemical data acquired from regular grids

  • Václav Bezvoda
  • Eva Jelínková
  • Karel Segeth
Articles

Abstract

Geochemical data obtained during mineral exploration often are biased by systematic as well as random errors; these may result in failures when usual methods of evaluation are used. This is true particularly in soil surveys carried out in regions where a long history of prospecting and mining activity has occurred and/or where aerial chemical pollution is likely to have occurred.

A satisfactory evaluation of geochemical data even in such an unfavorable case requires sampling on a relatively dense grid and utilization of all available knowledge of types of mineralization. The evaluation procedure proposed consists of five consecutive phases: (1). Dividing the area of interest into subareas of a relatively homogeneous geological nature. (2). Processing by multivariate methods (factor analysis, in particular) without consideration of geographic relations. (3). A preliminary interpretation and search for a geochemical explanation of factors. (4). Processing of individual factors in two-dimensional geographic space by directional and frequency linear filtering methods. (5). Final interpretation and construction of a geochemical model. The procedure is illustrated by an example from a geochemical exploration survey in the vicinity of Příbram (Middle Bohemia).

Key words

multivariate analysis linear filtering Fourier transform soil survey geochemical exploration methods 

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Copyright information

© Plenum Publishing Corporation 1986

Authors and Affiliations

  • Václav Bezvoda
    • 1
  • Eva Jelínková
    • 1
  • Karel Segeth
    • 2
  1. 1.Department of Applied Mathematics, Faculty of SciencesCharles UniversityPraha 2Czechoslovakia
  2. 2.Mathematical Institute of the Czechoslovak Academy of SciencesPraha 1Czechoslovakia

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