| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.725 | 0.599 | 5.167 | 8.415 |
| Arsenic | As (ppm) | 6.380 | 2.540 | 0.803 | 14.568 |
| Calcium | Ca (wt%) | 2.156 | 0.626 | 0.703 | 4.595 |
| Copper | Cu (ppm) | 19.279 | 7.558 | 3.007 | 43.094 |
| Iron | Fe (wt%) | 3.148 | 0.541 | 1.463 | 6.544 |
| Mercury | Hg (ppm) | 0.127 | 0.251 | 0.015 | 2.559 |
| Magnesium | Mg (wt%) | 0.920 | 0.301 | 0.299 | 3.051 |
| Manganese | Mn (ppm) | 750.575 | 140.805 | 384.987 | 1444.820 |
| Sodium | Na (wt%) | 1.547 | 0.280 | 0.759 | 2.360 |
| Phosphorus | P (wt%) | 0.091 | 0.022 | 0.042 | 0.163 |
| Lead | Pb (ppm) | 34.341 | 13.889 | 18.321 | 113.676 |
| Selenium | Se (ppm) | 0.589 | 0.388 | 0.100 | 2.207 |
| Titanium | Ti (wt%) | 0.371 | 0.063 | 0.212 | 0.644 |
| Zinc | Zn (ppm) | 151.472 | 143.909 | 39.023 | 800.193 |