Sample NPR1
NavDat sample number 54633 · TUFF
Sample
| Sample ID | NPR1 |
|---|---|
| Rock name | TUFF |
| Rock type | VOLCANIC |
| Composition | FELSIC |
| Material | IGNEOUS |
| Comment | Nevada Point Ridge, Placer County, California [SE 1/4, SW 1/4, SE 1/4, SE 1/4, Sec. 17, T13N, R13E along dirt road to Ramsey Crossing] White quartz sanidine vitric devitrified pumice free moderately welded tuff. |
Location
| Latitude | 38.9878 |
|---|---|
| Longitude | -120.563 |
| State / province | California |
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|---|---|---|---|---|
| 25.22 | 24.1 | 26.34 |
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|---|---|---|---|
| SIO2 | 74.79 | WT% | XRF | |
| TIO2 | 0.15 | WT% | XRF | |
| AL2O3 | 14.52 | WT% | XRF | |
| FEO | 0.61 | WT% | XRF | |
| MNO | 0.03 | WT% | XRF | |
| MGO | -0.41 | WT% | XRF | |
| CAO | 0.27 | WT% | XRF | |
| NA2O | 3.54 | WT% | XRF | |
| K2O | 4.83 | WT% | XRF | |
| P2O5 | -0.07 | WT% | XRF | |
| ZN | 75 | PPM | XRF | |
| GA | 22 | PPM | XRF | |
| RB | 215 | PPM | XRF | |
| SR | 11 | PPM | XRF | |
| Y | 41 | PPM | XRF | |
| ZR | 395 | PPM | XRF | |
| NB | 32 | PPM | XRF | |
| CS | -5 | PPM | XRF | |
| BA | 47 | PPM | XRF | |
| PB | 26 | PPM | XRF | |
| TH | 33 | PPM | XRF | |
| LA | 77 | PPM | XRF | |
| CE | 123 | PPM | XRF | |
| PR | 16 | PPM | XRF | |
| ND | 60 | PPM | XRF | |
| SM | 10 | PPM | XRF |