Sample H87-204
NavDat sample number 21005 · RHYOLITE
Sample
| Sample ID | H87-204 |
|---|---|
| Rock name | RHYOLITE |
| Rock type | VOLCANIC |
| Composition | FELSIC |
| Material | IGNEOUS |
Location
| Latitude | 30.5 |
|---|---|
| Longitude | -104.75 |
| Location | Bracks Rhyolite |
| State / province | Texas |
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|---|---|---|---|---|
| 36.8 | 26 | 38 |
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|---|---|---|---|
| SIO2 | 68.61 | WT% | ICPAES | |
| TIO2 | 0.53 | WT% | ICPAES | |
| AL2O3 | 13.03 | WT% | ICPAES | |
| FE2O3 | 4.32 | WT% | ICPAES | |
| FEO | 1.4 | WT% | ICPAES | |
| MNO | 0.17 | WT% | ICPAES | |
| MGO | 0.4 | WT% | ICPAES | |
| CAO | 1.15 | WT% | ICPAES | |
| NA2O | 3.89 | WT% | ICPAES | |
| K2O | 6.81 | WT% | ICPAES | |
| H2O_PLUS | 0.61 | WT% | ICPAES | |
| CO2 | 0.32 | WT% | ICPAES | |
| TOTAL | 99.43 | WT% | ICPAES | |
| Y | 71 | PPM | ICPMS | |
| LA | 68 | PPM | ICPMS | |
| CE | 152 | PPM | ICPMS | |
| ND | 66 | PPM | ICPMS | |
| EU | 2.2 | PPM | ICPMS | |
| GD | 15 | PPM | ICPMS | |
| DY | 14 | PPM | ICPMS | |
| ER | 8.9 | PPM | ICPMS | |
| YB | 7.9 | PPM | ICPMS | |
| LU | 1.2 | PPM | ICPMS |