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. 2021 Oct 9;44(10):3173–3189. doi: 10.1007/s10653-021-01098-4

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© The Author(s) 2021

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Fig. 5 — Elemental distribution of sulfur in the study area. In the upper left box, the results of 109 samples analyzed are indicated, whose concentrations vary from the minimum value (0.02 wt%) to the maximum value (0.9 wt%), with Q₁: 0.1 wt% and Q₃: 0.3 wt%