| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.288 | 1.623 | 2.124 | 9.202 |
| Arsenic | As (ppm) | 5.840 | 4.957 | 1.066 | 46.862 |
| Calcium | Ca (wt%) | 3.445 | 1.137 | 0.542 | 6.208 |
| Copper | Cu (ppm) | 23.361 | 18.558 | 4.278 | 200.556 |
| Iron | Fe (wt%) | 3.546 | 1.520 | 0.753 | 10.031 |
| Mercury | Hg (ppm) | 0.062 | 0.259 | 0.010 | 4.881 |
| Magnesium | Mg (wt%) | 1.772 | 0.753 | 0.311 | 4.722 |
| Manganese | Mn (ppm) | 608.655 | 235.962 | 132.660 | 2088.760 |
| Sodium | Na (wt%) | 1.450 | 0.643 | 0.251 | 2.832 |
| Phosphorus | P (wt%) | 0.086 | 0.018 | 0.026 | 0.139 |
| Lead | Pb (ppm) | 20.925 | 11.118 | 9.223 | 175.893 |
| Selenium | Se (ppm) | 0.208 | 0.084 | 0.100 | 0.595 |
| Titanium | Ti (wt%) | 0.382 | 0.132 | 0.135 | 0.894 |
| Zinc | Zn (ppm) | 69.141 | 22.188 | 20.597 | 202.887 |