| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.965 | 0.577 | 3.344 | 6.070 |
| Arsenic | As (ppm) | 7.853 | 1.423 | 4.960 | 11.271 |
| Calcium | Ca (wt%) | 0.270 | 0.075 | 0.150 | 0.568 |
| Copper | Cu (ppm) | 11.438 | 2.811 | 6.582 | 18.065 |
| Iron | Fe (wt%) | 2.599 | 0.390 | 1.924 | 3.355 |
| Mercury | Hg (ppm) | 0.040 | 0.008 | 0.023 | 0.081 |
| Magnesium | Mg (wt%) | 0.333 | 0.069 | 0.196 | 0.500 |
| Manganese | Mn (ppm) | 759.363 | 105.916 | 355.317 | 1027.220 |
| Sodium | Na (wt%) | 0.521 | 0.062 | 0.306 | 0.744 |
| Phosphorus | P (wt%) | 0.040 | 0.003 | 0.033 | 0.049 |
| Lead | Pb (ppm) | 20.597 | 2.414 | 15.063 | 26.470 |
| Selenium | Se (ppm) | 0.394 | 0.083 | 0.178 | 0.777 |
| Titanium | Ti (wt%) | 0.319 | 0.024 | 0.240 | 0.369 |
| Zinc | Zn (ppm) | 70.050 | 9.379 | 44.568 | 115.453 |