| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.781 | 0.494 | 3.440 | 5.724 |
| Arsenic | As (ppm) | 6.493 | 3.090 | 2.541 | 22.816 |
| Calcium | Ca (wt%) | 1.839 | 0.976 | 0.338 | 4.618 |
| Copper | Cu (ppm) | 13.360 | 4.780 | 5.573 | 36.987 |
| Iron | Fe (wt%) | 1.954 | 0.492 | 1.153 | 3.583 |
| Mercury | Hg (ppm) | 0.036 | 0.019 | 0.010 | 0.125 |
| Magnesium | Mg (wt%) | 0.715 | 0.216 | 0.367 | 1.373 |
| Manganese | Mn (ppm) | 360.749 | 163.478 | 196.647 | 1193.860 |
| Sodium | Na (wt%) | 0.576 | 0.131 | 0.346 | 1.076 |
| Phosphorus | P (wt%) | 0.059 | 0.022 | 0.022 | 0.103 |
| Lead | Pb (ppm) | 25.813 | 9.089 | 15.038 | 73.674 |
| Selenium | Se (ppm) | 0.633 | 0.340 | 0.124 | 1.623 |
| Titanium | Ti (wt%) | 0.222 | 0.031 | 0.140 | 0.304 |
| Zinc | Zn (ppm) | 67.205 | 34.147 | 26.155 | 214.240 |