Sample NPR4
NavDat sample number 54634 · TUFF
Sample
| Sample ID | NPR4 |
|---|---|
| Rock name | TUFF |
| Rock type | VOLCANIC |
| Composition | FELSIC |
| Material | IGNEOUS |
| Comment | Nevada Point Ridge, Placer County, California [NW 1/4, SE 1/4, NE 1/4, SE 1/4, Sec. 17, T13N, R13E] Devitrified densely welded tuff 0.5 m above vitrophyre |
Location
| Latitude | 38.9795 |
|---|---|
| Longitude | -120.545 |
| 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 | 74.46 | WT% | XRF | |
| TIO2 | 0.15 | WT% | XRF | |
| AL2O3 | 12.99 | WT% | XRF | |
| FEO | 0.45 | WT% | XRF | |
| MNO | 0.03 | WT% | XRF | |
| MGO | -0.41 | WT% | XRF | |
| CAO | 0.23 | WT% | XRF | |
| NA2O | 4.31 | WT% | XRF | |
| K2O | 5.15 | WT% | XRF | |
| P2O5 | -0.07 | WT% | XRF | |
| ZN | 56 | PPM | XRF | |
| GA | 25 | PPM | XRF | |
| RB | 209 | PPM | XRF | |
| SR | 11 | PPM | XRF | |
| Y | 48 | PPM | XRF | |
| ZR | 389 | PPM | XRF | |
| NB | 32 | PPM | XRF | |
| CS | -5 | PPM | XRF | |
| BA | 52 | PPM | XRF | |
| PB | 27 | PPM | XRF | |
| TH | 31 | PPM | XRF | |
| LA | 63 | PPM | XRF | |
| CE | 93 | PPM | XRF | |
| PR | 12 | PPM | XRF | |
| ND | 60 | PPM | XRF | |
| SM | 10 | PPM | XRF |