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Sample 94L-20
NavDat sample number 45897 · ANDESITE
Sample
| Sample ID | 94L-20 |
|---|
| Rock name | ANDESITE |
|---|
| Rock type | VOLCANIC |
|---|
| Composition | INTERMEDIATE |
|---|
| Material | IGNEOUS |
|---|
Location
| Latitude | 37.793 |
|---|
| Longitude | -107.058 |
|---|
| Location | Bristol Head |
|---|
| State / province | COLORADO |
|---|
| Formation | Rat Creek or late flow of SR cycle? Caldera Cycle, andesite of Bristol Head, capping flow |
|---|
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 31.5 |
|
28 |
35 |
|
|
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|
| SIO2 | 63.07 | | WT% | XRF |
| TIO2 | 0.713017 | | WT% | XRF |
| AL2O3 | 16.1684 | | WT% | XRF |
| FE2O3 | 5.50328 | | WT% | XRF |
| MGO | 1.59676 | | WT% | XRF |
| CAO | 4.17768 | | WT% | XRF |
| NA2O | 3.66551 | | WT% | XRF |
| K2O | 3.86636 | | WT% | XRF |
| P2O5 | 0.381615 | | WT% | XRF |
| MNO | 0.130552 | | WT% | XRF |
| LOI | 0.42 | | WT% | XRF |
| TOTAL | 99.27 | | WT% | XRF |
| ZN | 51 | | PPM | XRF |
| RB | 104 | | PPM | XRF |
| SR | 700 | | PPM | XRF |
| Y | 30 | | PPM | XRF |
| ZR | 240 | | PPM | XRF |
| NB | 13 | | PPM | XRF |
| BA | 1200 | | PPM | XRF |
| LA | 30 | | PPM | XRF |
| CE | 89 | | PPM | XRF |
| CU | 20 | | PPM | XRF |
| CR | -20 | | PPM | XRF |
| NI | -10 | | PPM | XRF |
