| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.030 | 0.693 | 5.161 | 8.724 |
| Arsenic | As (ppm) | 43.023 | 21.031 | 9.743 | 99.592 |
| Calcium | Ca (wt%) | 2.802 | 0.610 | 1.652 | 5.364 |
| Copper | Cu (ppm) | 74.026 | 35.858 | 18.193 | 164.775 |
| Iron | Fe (wt%) | 4.312 | 1.654 | 1.775 | 8.959 |
| Mercury | Hg (ppm) | 0.093 | 0.046 | 0.030 | 0.160 |
| Magnesium | Mg (wt%) | 1.372 | 0.409 | 0.648 | 2.604 |
| Manganese | Mn (ppm) | 1009.580 | 211.552 | 462.706 | 1546.220 |
| Sodium | Na (wt%) | 1.712 | 0.239 | 1.079 | 2.509 |
| Phosphorus | P (wt%) | 0.088 | 0.021 | 0.047 | 0.134 |
| Lead | Pb (ppm) | 42.065 | 16.274 | 15.246 | 79.031 |
| Selenium | Se (ppm) | 0.459 | 0.175 | 0.128 | 0.891 |
| Titanium | Ti (wt%) | 0.361 | 0.076 | 0.243 | 0.576 |
| Zinc | Zn (ppm) | 114.774 | 35.532 | 45.618 | 201.947 |