| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.848 | 0.782 | 2.225 | 6.151 |
| Arsenic | As (ppm) | 2.547 | 1.872 | 0.416 | 12.560 |
| Calcium | Ca (wt%) | 1.552 | 1.013 | 0.589 | 6.770 |
| Copper | Cu (ppm) | 4.251 | 5.049 | 1.000 | 21.287 |
| Iron | Fe (wt%) | 2.996 | 2.399 | 1.278 | 17.776 |
| Mercury | Hg (ppm) | 0.050 | 0.020 | 0.021 | 0.112 |
| Magnesium | Mg (wt%) | 0.440 | 0.176 | 0.202 | 1.076 |
| Manganese | Mn (ppm) | 446.726 | 101.259 | 282.839 | 821.133 |
| Sodium | Na (wt%) | 0.944 | 0.251 | 0.583 | 1.720 |
| Phosphorus | P (wt%) | 0.052 | 0.020 | 0.026 | 0.106 |
| Lead | Pb (ppm) | 22.630 | 11.980 | 8.450 | 73.458 |
| Selenium | Se (ppm) | 0.135 | 0.060 | 0.100 | 0.460 |
| Titanium | Ti (wt%) | 0.511 | 0.085 | 0.334 | 0.741 |
| Zinc | Zn (ppm) | 39.574 | 18.951 | 17.979 | 99.469 |