| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.885 | 0.416 | 3.518 | 6.187 |
| Arsenic | As (ppm) | 3.921 | 1.994 | 0.949 | 10.655 |
| Calcium | Ca (wt%) | 2.291 | 0.711 | 0.698 | 4.942 |
| Copper | Cu (ppm) | 17.426 | 9.552 | 7.902 | 78.723 |
| Iron | Fe (wt%) | 2.562 | 0.447 | 1.570 | 3.733 |
| Mercury | Hg (ppm) | 0.041 | 0.010 | 0.011 | 0.078 |
| Magnesium | Mg (wt%) | 0.716 | 0.115 | 0.419 | 1.117 |
| Manganese | Mn (ppm) | 903.902 | 154.376 | 538.065 | 1427.580 |
| Sodium | Na (wt%) | 1.236 | 0.214 | 0.734 | 1.753 |
| Phosphorus | P (wt%) | 0.072 | 0.013 | 0.048 | 0.112 |
| Lead | Pb (ppm) | 32.087 | 2.247 | 24.941 | 44.204 |
| Selenium | Se (ppm) | 0.170 | 0.049 | 0.101 | 0.388 |
| Titanium | Ti (wt%) | 0.558 | 0.109 | 0.228 | 0.988 |
| Zinc | Zn (ppm) | 48.965 | 6.939 | 28.231 | 70.430 |