Figure 2. Box plots of relative enrichments of elements compared to "average crust" (Taylor and McLennan, 1985). The definition of enrichment factor is described in the text. Sources or textural associations of the elements as inferred from their depth profiles are also shown.

Figure 2. Box plots of relative enrichments of elements compared to "average crust" (Taylor and McLennan, 1985). The definition of enrichment factor is described in the text. Sources or textural associations of the elements as inferred from their depth profiles are also shown.