Data processing requirements and visual representation for stream sediment exploration geochemical surveys

Stream sediment geochemistry of the Upper Mahaweli River Basin of Sri Lanka—Geological and environmental significance

“…Samples were separated using a mechanical sieve shaker into size fractions. Since b63 μm sediment size fraction has the highest concentration of most of the trace elements, it was selected for chemical analysis (Chapman, 1975;Horowitz, 1991;Ranasinghe et al, 2002).…”

Statistical evaluation of stream sediment geochemistry in interpreting the river catchment of high-grade metamorphic terrains

“…Samples were then separated using a mechanical sieve shaker into size fractions. The < 63 μm sediment size fraction was selected for chemical analysis as this size fraction had the highest concentration of most of the trace elements (Ranasinghe et al, 2002;Horowitz, 1991;Chapman, 1975).…”

Log transformations in geochemistry

“…However, a biased or poor estimate of the sample mean will have an effect on other statistics. This is a common problem that may be resolved in a number of ways, and very simply by standardizing each analytical result to the appropriate background or threshold (Govett and others, 1975;Govett and Galanos, 1974;Chapman, 1975). 2.…”