| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.211 | 0.277 | 4.539 | 5.696 |
| Arsenic | As (ppm) | 11.272 | 1.084 | 9.210 | 13.509 |
| Calcium | Ca (wt%) | 0.811 | 0.302 | 0.456 | 1.564 |
| Copper | Cu (ppm) | 22.006 | 5.386 | 15.594 | 35.209 |
| Iron | Fe (wt%) | 3.894 | 0.593 | 3.233 | 5.490 |
| Mercury | Hg (ppm) | 0.040 | 0.006 | 0.031 | 0.053 |
| Magnesium | Mg (wt%) | 0.515 | 0.083 | 0.383 | 0.724 |
| Manganese | Mn (ppm) | 1465.500 | 447.458 | 1016.110 | 2651.090 |
| Sodium | Na (wt%) | 0.476 | 0.044 | 0.381 | 0.530 |
| Phosphorus | P (wt%) | 0.059 | 0.009 | 0.046 | 0.082 |
| Lead | Pb (ppm) | 40.503 | 14.841 | 26.732 | 75.156 |
| Selenium | Se (ppm) | 0.429 | 0.038 | 0.370 | 0.495 |
| Titanium | Ti (wt%) | 0.310 | 0.005 | 0.299 | 0.325 |
| Zinc | Zn (ppm) | 126.076 | 31.539 | 88.706 | 190.516 |