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. Author manuscript; available in PMC: 2019 Mar 1.
Published in final edited form as: Nat Sustain. 2018 Sep 14;1(9):495–504. doi: 10.1038/s41893-018-0139-4

Figure 2. Concentrations of trace elements in surface dust and ore.

Figure 2

Left panel: concentrations of trace elements, ranked by their abundance in 3 samples of ore (grey bars), surface dust from the mining (exposed) area (9 plots, red bars) and the control area (5 plots, green bars); bars represent the range of values with mean (for some elements, green bars are partially or totally hidden behind another bar).

Right panel: Ratio of geometric mean (GM) concentrations of metals in surface dust from the exposed area over the control area (y-axis) against ratio of GM concentrations of metals in ore over control surface dust (x-axis). Confidence intervals of GM ratios can be found in Supplementary Table 1. Full symbols indicate both GM ratios are significantly higher than 1, half-filled symbols indicate GM ratio differs significantly from 1 only for ore/control (symbol divided horizontally) or only for exposed/control (symbol divided vertically). Spearman correlation coefficient for the 20 data points is 0.85 (95% CI 0.65–0.94, p<0.0001)]