GEOROC Sample Information
Location
Latitude -0.5133 | Longitude -91.13
ALCEDO
CONVERGENT MARGIN
Reference
MACDONALD R.,SMITH R. L.,THOMAS J. E. JR.
CHEMISTRY OF THE SUBALKALIC SILICIC OBSIDIANS
U. S. GEOL. SURV. PROF. PAP. 1523 [1992] 1-214
Sample Name: 193
Sample Information
NOT GIVEN / PHENOCRYSTIC TEXTURE / OBSIDIAN, POST(?)-CALDERA LAVA FLOW
OUTCROP
Sample Age Information
No sample age information given.
Chemistry (and, if given, analytical ages)
Analyzed: VOLCANIC GLASS
| AL2O3 | 13.36 WT% |
| CAO | 1.23 WT% |
| CL | 0.12 WT% |
| CL | 0.1 WT% |
| F | 0.1 WT% |
| F | 0.09 WT% |
| FE2O3 | 1.1 WT% |
| FEO | 2.83 WT% |
| H2OP | 0.14 WT% |
| K2O | 3.01 WT% |
| MGO | 0.24 WT% |
| MNO | 0.14 WT% |
| NA2O | 5.93 WT% |
| P2O5 | 0.03 WT% |
| SIO2 | 71 WT% |
| TIO2 | 0.37 WT% |
| CE | 136 PPM |
| EU | 2.81 PPM |
| GD | 16.7 PPM |
| LA | 66 PPM |
| LU | 1.35 PPM |
| ND | 73 PPM |
| SM | 17.5 PPM |
| TB | 2.76 PPM |
| TM | 1.5 PPM |
| YB | 10 PPM |
| BA | 435 PPM |
| BE | 5.2 PPM |
| CO | 1.5 PPM |
| CR | 0.6 PPM |
| CS | 1 PPM |
| HF | 21.3 PPM |
| LI | 28 PPM |
| MO | 6 PPM |
| NB | 83 PPM |
| NB | 79 PPM |
| PB | 10 PPM |
| RB | 71 PPM |
| RB | 50 PPM |
| SB | 0 PPM |
| SC | 4.7 PPM |
| SN | 8.4 PPM |
| SR | 90 PPM |
| TA | 5.64 PPM |
| TH | 10.4 PPM |
| U | 2.8 PPM |
| W | 2.1 PPM |
| Y | 108 PPM |
| ZN | 142 PPM |
| ZR | 840 PPM |