Table 2
Shape classification of Mn nodule based on the size of the nodules from the East Siberian Arctic shelf
| Size | Shape | ARA12B-St52 | ARA12B-St58i | ||
|---|---|---|---|---|---|
| n | % | n | % | ||
| Small (< 3 cm) | Spherical | 5 | 2.1 | - | - |
| Ellipsoidal | 9 | 3.8 | - | - | |
| Tabular | 5 | 2.1 | 5 | 2.5 | |
| Tube | 7 | 2.9 | 1 | 0.5 | |
| Irregular | 38 | 15.9 | 3 | 1.5 | |
| Medium (3-6 cm) | Spherical | 2 | 0.8 | - | - |
| Ellipsoidal | 27 | 11.3 | 2 | 1.0 | |
| Tabular | 49 | 20.5 | 101 | 50.2 | |
| Tube | 24 | 10.0 | 8 | 4.0 | |
| Irregular | 21 | 8.8 | 14 | 7.0 | |
| Polynucleate | 1 | 0.4 | - | - | |
| Large (> 6 cm) | Tabular | 36 | 15.1 | 60 | 29.9 |
| Tube | 14 | 5.9 | 5 | 2.5 | |
| Irregular | 1 | 0.4 | 2 | 1.0 | |
| Total | 239 | 100.0 | 201 | 100.0 | |
Econ. Environ. Geol. 2023;56:1~11 https://doi.org/10.9719/EEG.2023.56.1.1
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