GEOROC Sample Information
Location
Latitude 4.895 | Longitude -75.323
ANDEAN ARC / NORTHERN ANDEAN VOLCANIC ZONE / COLOMBIA / NEVADO DEL RUIZ
CONVERGENT MARGIN
Reference
SIGURDSSON H.,DEVINE J. D.,CAREY S. N.,PALAIS J. M.
PRE-ERUPTION COMPOSITIONAL GRADIENTS AND MIXING OF ANDESITE AND DACITE MAGMA ERUPTED FROM NEVADO DEL RUIZ VOLCANO, COLOMBIA IN 1985
J. VOLCANOL. GEOTHERM. RES. 41 [1990] 127-151
Sample Name: COL-26A
Sample Information
ANDESITE / PUMICE
OUTCROP
Sample Age Information
HOLOCENE
11/13/1985 eruption
Chemistry (and, if given, analytical ages)
Analyzed: WHOLE ROCK
| AL2O3 | 15.83 WT% |
| CAO | 6.06 WT% |
| FEOT | 5.57 WT% |
| K2O | 2.05 WT% |
| MGO | 4.76 WT% |
| MNO | 0.1 WT% |
| NA2O | 3.47 WT% |
| P2O5 | 0.19 WT% |
| SIO2 | 61.27 WT% |
| TIO2 | 0.68 WT% |
| CE | 42 PPM |
| LA | 14 PPM |
| BA | 1055 PPM |
| CU | 44 PPM |
| NB | 6 PPM |
| NI | 75 PPM |
| RB | 61 PPM |
| SR | 539 PPM |
| Y | 12 PPM |
| ZN | 64 PPM |
| ZR | 121 PPM |
Analyzed: MINERAL / COMPONENT (INCL. GROUNDMASS) GLASS
| AL2O3 | 13.6 ± 0.38 WT% |
| CAO | 1.22 ± 0.25 WT% |
| FEOT | 1.82 ± 0.15 WT% |
| K2O | 4.96 ± 0.33 WT% |
| MGO | 0.36 ± 0.03 WT% |
| MNO | 0.01 ± 0.01 WT% |
| NA2O | 5.33 ± 1.03 WT% |
| P2O5 | 0.03 ± 0.06 WT% |
| SIO2 | 71.94 ± 1.51 WT% |
| TIO2 | 0.73 ± 0.04 WT% |