| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.491 | 0.627 | 4.101 | 6.608 |
| Arsenic | As (ppm) | 7.369 | 2.940 | 2.542 | 18.617 |
| Calcium | Ca (wt%) | 1.527 | 0.832 | 0.374 | 3.553 |
| Copper | Cu (ppm) | 11.117 | 3.680 | 7.322 | 27.283 |
| Iron | Fe (wt%) | 3.288 | 0.498 | 2.095 | 4.075 |
| Mercury | Hg (ppm) | 0.037 | 0.008 | 0.018 | 0.053 |
| Magnesium | Mg (wt%) | 0.888 | 0.181 | 0.609 | 1.566 |
| Manganese | Mn (ppm) | 683.384 | 100.427 | 474.019 | 1049.900 |
| Sodium | Na (wt%) | 0.707 | 0.111 | 0.499 | 0.996 |
| Phosphorus | P (wt%) | 0.055 | 0.003 | 0.048 | 0.065 |
| Lead | Pb (ppm) | 25.569 | 4.316 | 13.717 | 41.216 |
| Selenium | Se (ppm) | 0.170 | 0.035 | 0.103 | 0.274 |
| Titanium | Ti (wt%) | 0.366 | 0.036 | 0.289 | 0.434 |
| Zinc | Zn (ppm) | 75.019 | 10.691 | 44.892 | 99.873 |