| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.073 | 0.356 | 3.112 | 5.572 |
| Arsenic | As (ppm) | 10.604 | 6.154 | 4.642 | 36.726 |
| Calcium | Ca (wt%) | 0.254 | 0.040 | 0.164 | 0.419 |
| Copper | Cu (ppm) | 12.380 | 3.990 | 5.550 | 31.895 |
| Iron | Fe (wt%) | 1.382 | 0.180 | 0.947 | 2.223 |
| Mercury | Hg (ppm) | 0.042 | 0.008 | 0.019 | 0.070 |
| Magnesium | Mg (wt%) | 0.215 | 0.033 | 0.136 | 0.379 |
| Manganese | Mn (ppm) | 930.554 | 221.149 | 306.523 | 1964.730 |
| Sodium | Na (wt%) | 0.633 | 0.059 | 0.436 | 0.818 |
| Phosphorus | P (wt%) | 0.034 | 0.005 | 0.024 | 0.050 |
| Lead | Pb (ppm) | 16.741 | 1.514 | 12.770 | 20.515 |
| Selenium | Se (ppm) | 0.388 | 0.119 | 0.209 | 1.017 |
| Titanium | Ti (wt%) | 0.300 | 0.019 | 0.255 | 0.352 |
| Zinc | Zn (ppm) | 41.161 | 5.321 | 25.873 | 62.241 |