Geochemical surveys studies scales

Geochemical patterns are related to choice of map scale, which depends on densities of data. What map scale and data density used mainly depends on the size of the surveyed area and the purpose of the mapping study. 

Figure 1.2 Sampling density (sampling sites per km2) for different scales of geochemical studies according to the new classification scheme after the continent-wide geochemical baseline surveys were started.

Erickson, R. L., Mosier, E. L., and Viets, J. G., 1978, Generalized geologic and summary geochemical maps of the Rolla 1x2 degree quadrangle, Missouri U. S. Geological Survey Miscellaneous Field Studies Map MF-1004-A, scale 1 250,000. 

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