Sample 85L-18E
NavDat sample number 45797 · PYROCLASTIC-FALL
Sample
| Sample ID | 85L-18E |
|---|---|
| Rock name | PYROCLASTIC-FALL |
| Rock type | VOLCANIC |
| Composition | FELSIC |
| Material | IGNEOUS |
Location
| Latitude | 37.938 |
|---|---|
| Longitude | -107.064 |
| Location | Miners Creek, Snow Mesa |
| State / province | COLORADO |
| Formation | Nelson Mountain Caldera cycle, Nelson Mountain Tuff |
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|---|---|---|---|---|
| 26.5 | 25.9 | 27.1 |
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|---|---|---|---|
| SIO2 | 71.35 | WT% | XRF | |
| TIO2 | 0.321322 | WT% | XRF | |
| AL2O3 | 14.821 | WT% | XRF | |
| FE2O3 | 2.02834 | WT% | XRF | |
| MGO | 0.471942 | WT% | XRF | |
| CAO | 1.48611 | WT% | XRF | |
| NA2O | 4.11694 | WT% | XRF | |
| K2O | 4.90016 | WT% | XRF | |
| P2O5 | 0.0903718 | WT% | XRF | |
| MNO | 0.0702892 | WT% | XRF | |
| LOI | 0.41 | WT% | XRF | |
| TOTAL | 99.66 | WT% | XRF | |
| ZN | 65 | PPM | XRF | |
| RB | 147 | PPM | XRF | |
| SR | 291 | PPM | XRF | |
| Y | 28 | PPM | XRF | |
| ZR | 236 | PPM | XRF | |
| NB | 20 | PPM | XRF | |
| PB | 40 | PPM | XRF | |
| NI | 7 | PPM | XRF | |
| RB | 138 | PPM | INAA | |
| BA | 1230 | PPM | INAA | |
| SR | 265 | PPM | INAA | |
| TH | 11.7 | PPM | INAA | |
| U | 4.05 | PPM | INAA | |
| LA | 46.5 | PPM | INAA | |
| CE | 93.5 | PPM | INAA | |
| ND | 38.5 | PPM | INAA | |
| SM | 7.31 | PPM | INAA | |
| EU | 1.34 | PPM | INAA | |
| GD | 5.61 | PPM | INAA | |
| TB | 0.847 | PPM | INAA | |
| TM | 0.486 | PPM | INAA | |
| YB | 2.85 | PPM | INAA | |
| LU | 0.418 | PPM | INAA | |
| TA | 1.44 | PPM | INAA | |
| ZR | 214 | PPM | INAA | |
| HF | 6.7 | PPM | INAA | |
| SB | 0.238 | PPM | INAA | |
| SC | 4.42 | PPM | INAA | |
| CR | 0.847 | PPM | INAA | |
| CO | 1.87 | PPM | INAA | |
| ZN | 62.6 | PPM | INAA |