| LA ICPMS results of Nyiragongo 2002 for SMIs and lava glassy matrix | ||||||||
| Geodynamic context: | Rift | |||||||
| Rift zone: | East African Rift System | |||||||
| Rift zone target: | Western Branch (WB) | |||||||
| Locality: | Goma (North Kivu)/DRC | |||||||
| Volcano: | Nyiragongo | |||||||
| Volcano type: | Stratovolcano | |||||||
| Samples | DM 14UM-N -SMI (4) | DM 14UM-H -SMI (2) | DM 14UM-P -SMI (3) | DM 14UM-A -SMI (7) | DM 14UM-N -GLASS | DM 14UM-H -GLASS | DM 14UM-P -GLASS | DM 14UM-A -GLASS |
| Major elements |
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| SiO2 (wt%) | 31.14 | 31.33 | 30.58 | 31.76 | 40.75 | 40.90 | 38.07 | 40.35 |
| TiO2 (wt%) | 1.38 | 1.67 | 1.38 | 0.20 | 1.78 | 0.92 | 1.68 | 2.66 |
| Al2O3 (wt%) | 9.14 | 7.88 | 8.85 | 9.44 | 7.81 | 24.31 | 22.88 | 20.77 |
| FeOt (wt%) | 2.36 | 2.17 | 2.16 | 2.75 | 4.55 | 2.54 | 3.85 | 2.17 |
| MnO (wt%) | 0.10 | 0.10 | 0.10 | 0.20 | 0.49 | 0.20 | 0.39 | 0.20 |
| MgO (wt%) | 20.14 | 24.14 | 21.93 | 28.12 | 6.92 | 5.39 | 7.40 | 13.98 |
| CaO (wt%) | 33.20 | 30.25 | 32.65 | 24.48 | 32.64 | 11.70 | 12.52 | 10.73 |
| Na2O (wt%) | 1.38 | 1.38 | 1.28 | 1.77 | 3.86 | 7.32 | 7.89 | 5.61 |
| K2O (wt%) | 1.08 | 0.99 | 0.98 | 1.18 | 0.99 | 6.51 | 5.03 | 3.15 |
| P2O5 (wt%) | 0.10 | 0.10 | 0.10 | 0.10 | 0.20 | 0.20 | 0.30 | 0.39 |
| Total (wt%) | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Na2O + K2O (wt%) | 2.5 | 2.4 | 2.3 | 2.9 | 4.8 | 13.8 | 12.9 | 8.8 |
| Na2O/K2O | 1.3 | 1.4 | 1.3 | 1.5 | 3.9 | 1.1 | 1.6 | 1.8 |
| Mg# [Mg/(Mg + Fe)] | 0.9 | 0.9 | 0.9 | 0.9 | 0.6 | 0.7 | 0.7 | 0.9 |
| Minor elements |
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| Sc (ppm) | 241 | 231 | 213 | 14 | 9 | 4 | 16 | 48 |
| V (ppm) | 508 | 457 | 499 | 917 | 162 | 81 | 454 | 317 |
| Cr (ppm) | 2956 | 5987 | 1842 | 399 | 8 | 11 | 15 | 176 |
| Be (ppm) | bdl | bdl | bdl | bdl | 10 | 12 | bdl | bdl |
| B (ppm) | 63 | 77 | 49 | 62 | 50 | 56 | 54 | 41 |
| Co (ppm) | 66 | 70 | 66 | 291 | 86 | 40 | 67 | 68 |
| Ni (ppm) | 296 | 251 | 266 | 2636 | 57 | 84 | 101 | 133 |
| Cu (ppm) | 4 | 4 | 41 | 13 | 39 | 132 | 170 | 115 |
| Zn (ppm) | 45 | 39 | 46 | 213 | 455 | 468 | 391 | 204 |
| Hf (ppm) | 10 | 8 | 9 | 8 | 18 | 1 | 12 | 8 |
| Ta (ppm) | 0 | 0 | 0 | 0 | 30 | 19 | 21 | 3 |
| Re (ppm) | 1 | 1 | 1 | 1 | 1 | 1 | 2 | bdl |
| Ir (ppm) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | bdl |
| Ga (ppm) | 21 | 16 | 20 | 2 | 39 | 42 | 45 | 39 |
| Rb (ppm) | 1 | 1 | 1 | 1 | 17 | 334 | 130 | 41 |
| Sr (ppm) | 241 | 220 | 241 | 658 | 11067 | 13321 | 5854 | 816 |
| Y (ppm) | 18 | 17 | 19 | 3 | 93 | 41 | 47 | 46 |
| Zr (ppm) | 168 | 135 | 175 | 219 | 1215 | 198 | 776 | 324 |
| Nb (ppm) | 1 | 1 | 1 | 3 | 420 | 461 | 240 | 52 |
| Mo (ppm) | 3 | 3 | 21 | 3 | 4 | 14 | 5 | 4 |
| Sn (ppm) | 8 | 6 | bdl | bdl | 6 | 8 | 8 | 4 |
| Sb (ppm) | bdl | bdl | bdl | bdl | 3 | bdl | bdl | bdl |
| Cs (ppm) | 1 | 5 | 18 | 1 | 1 | 4 | 9 | 1 |
| Ba (ppm) | 4 | 4 | 4 | 23 | 2761 | 9732 | 1330 | 617 |
| W (ppm) | 1 | 2 | bdl | 2 | 2 | 6 | 7 | bdl |
| Pt (ppm) | 2 | 2 | 2 | 3 | 2 | 3 | 3 | bdl |
| Pb (ppm) | 1 | 1 | 8 | 1 | 6 | 22 | 7 | 6 |
| La (ppm) | 10 | 8 | 10 | 2 | 394 | 306 | 199 | 42 |
| Ce (ppm) | 37 | 28 | 38 | 54 | 767 | 529 | 422 | 90 |
| Pr (ppm) | 6 | 6 | 6 | 1 | 81 | 49 | 45 | 11 |
| Nd (ppm) | 35 | 31 | 37 | 3 | 270 | 151 | 160 | 44 |
| Sm (ppm) | 9 | 9 | 9 | 10 | 40 | 22 | 25 | 11 |
| Eu (ppm) | 2 | 2 | 2 | 2 | 13 | 7 | 7 | 3 |
| Gd (ppm) | 7 | 7 | 7 | 7 | 27 | 11 | 17 | 9 |
| Tb (ppm) | 1 | 1 | 1 | 1 | 4 | 2 | 3 | 1 |
| Dy (ppm) | 5 | 4 | 5 | 5 | 22 | 10 | 11 | 9 |
| Ho (ppm) | 1 | 1 | 1 | 1 | 4 | 2 | 2 | 2 |
| Er (ppm) | 1 | 2 | 2 | 2 | 10 | 4 | 5 | 4 |
| Tm (ppm) | 0 | 0 | 0 | 1 | 2 | 1 | 1 | 1 |
| Yb (ppm) | 2 | 2 | 2 | 4 | 12 | 3 | 5 | 5 |
| Lu (ppm) | 0 | 0 | 0 | 1 | 2 | 0 | 1 | 1 |
| S (ppm) | 103 | 150 | 315 | 196 | 1851 | 1344 | 1538 | 2634 |
| F (ppm) | 350 | 452 | 339 | 365 | 1009 | 1256 | 1142 | 3315 |
| Cl (ppm) | 343 | 259 | 270 | 670 | 250 | 345 | 607 | 806 |
| ∑REE (ppm) | 117 | 101 | 119 | 93 | 1646 | 1096 | 902 | 231 |