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Sample MR-4
NavDat sample number 67148 · DACITE
Sample
| Sample ID | MR-4 |
|---|
| Rock name | DACITE |
|---|
| Rock type | PLUTONIC |
|---|
| Composition | FELSIC |
|---|
| Material | IGNEOUS |
|---|
| Comment | dacite dike |
|---|
Location
| Latitude | 39.08 |
|---|
| Longitude | -106.58 |
|---|
| Location | first tributary of McNasser Creek |
|---|
| State / province | COLORADO |
|---|
| Formation | Post-resurgent intrusions of Grizzly Peak Cauldron |
|---|
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 33 |
|
29.7 |
36.3 |
|
|
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|
| SIO2 | 70.4 | | WT% | XRF |
| AL2O3 | 16.78 | | WT% | XRF |
| FE2O3 | 2.52 | | WT% | XRF |
| MGO | 0.85 | | WT% | XRF |
| CAO | 1.54 | | WT% | XRF |
| NA2O | 4.29 | | WT% | XRF |
| K2O | 4.51 | | WT% | XRF |
| TIO2 | 0.35 | | WT% | XRF |
| P2O5 | 0.14 | | WT% | XRF |
| MNO | 0.09 | | WT% | XRF |
| NB | 14 | | PPM | XRF |
| ZR | 173 | | PPM | XRF |
| Y | 24 | | PPM | XRF |
| SR | 475 | | PPM | XRF |
| RB | 127 | | PPM | XRF |
| BA | 1406 | | PPM | XRF |
