GEOROC Sample Information
Location
Latitude -0.41 | Longitude -91.03
GALAPAGOS ISLANDS / ISABELA (ALBEMARLE) / ALCEDO
OCEAN ISLAND
Reference
GEIST D. J.,HOWARD K. A.,LARSON P. B.
THE GENERATION OF OCEANIC RHYOLITES BY CRYSTAL FRACTIONATION: THE BASALT-RHYOLITE ASSOCIATION AT VOLCAN ALCEDO, GALAPAGOS ARCHIPELAGO
J. PETROL. 36 [1995] 965-982
Sample Name: H29
Sample Information
GRANOPHYRE / MEDIUM-GRAINED TEXTURE / BLOCK
OUTCROP
Sample Age Information
No sample age information given.
Chemistry (and, if given, analytical ages)
Analyzed: WHOLE ROCK
| D18O | 5.5 ‰SMOW |
| AL2O3 | 14.25 WT% |
| CAO | 1.85 WT% |
| FE2O3T | 3.96 WT% |
| K2O | 3.19 WT% |
| LOI | 0.89 WT% |
| MGO | 0.35 WT% |
| MNO | 0.1 WT% |
| NA2O | 5.26 WT% |
| P2O5 | 0.09 WT% |
| SIO2 | 69.22 WT% |
| TIO2 | 0.54 WT% |
| BA | 324 PPM |
| NB | 54 PPM |
| NI | 10 PPM |
| RB | 70 PPM |
| SR | 118 PPM |
| Y | 64 PPM |
| ZR | 598 PPM |