Sample J87-66
NavDat sample number 33621 · RHYOLITE
Sample
| Sample ID | J87-66 |
|---|---|
| Rock name | RHYOLITE |
| Rock type | VOLCANIC |
| Composition | FELSIC |
| Material | IGNEOUS |
Location
| Latitude | 30.5933 |
|---|---|
| Longitude | -103.962 |
| Location | Barrel Springs Formation |
| State / province | Texas |
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|---|---|---|---|---|
| 35.6 | 26 | 38 |
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|---|---|---|---|
| SIO2 | 71.57 | WT% | ICP | |
| TIO2 | 0.49 | WT% | ICP | |
| AL2O3 | 13.81 | WT% | ICP | |
| FE2O3 | 1.67 | WT% | ICP | |
| FEO | 1.49 | WT% | ICP | |
| MNO | 0.08 | WT% | ICP | |
| MGO | 0.35 | WT% | ICP | |
| CAO | 0.98 | WT% | ICP | |
| NA2O | 3.22 | WT% | ICP | |
| K2O | 6.32 | WT% | ICP | |
| P2O5 | 0.02 | WT% | ICP | |
| H2O_PLUS | 3.46 | WT% | ICP | |
| TOTAL | 96.02 | WT% | ICP | |
| SR | 76 | PPM | ICP | |
| Y | 78 | PPM | ICP | |
| BA | 179 | PPM | ICP | |
| LA | 102 | PPM | ICP | |
| CE | 206 | PPM | ICP | |
| ND | 77 | PPM | XRF | |
| GD | 14 | PPM | XRF | |
| DY | 13 | PPM | XRF | |
| ER | 9.6 | PPM | XRF | |
| TM | 9.2 | PPM | XRF | |
| YB | 1.4 | PPM | XRF |