Sample 6
NavDat sample number 4636 · ANDESITE
Sample
| Sample ID | 6 |
|---|---|
| Rock name | ANDESITE |
| Rock type | VOLCANIC |
| Composition | INTERMEDIATE |
| Material | IGNEOUS |
| Comment | differentiated from other andesites by brecciation, sub-equal amounts of hornblende and biotite phenocrysts, and darker color of hornblende and biotite |
Location
| Latitude | 39.1845 |
|---|---|
| Longitude | -121.815 |
| Location | De Witt's volcano |
| State / province | California |
| Volcanic field | Sutter Buttes |
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|---|---|---|---|---|
| 1.75 | 1.5 | 2 |
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|---|---|---|---|
| SIO2 | 60.24 | WT% | XRF | |
| TIO2 | 0.58 | WT% | XRF | |
| AL2O3 | 17.78 | WT% | XRF | |
| FEO | 2.91 | WT% | XRF | |
| FE2O3 | 2.12 | WT% | XRF | |
| MNO | 0.12 | WT% | XRF | |
| CAO | 6.02 | WT% | XRF | |
| MGO | 3.26 | WT% | XRF | |
| NA2O | 3.78 | WT% | XRF | |
| K2O | 2.1 | WT% | XRF | |
| P2O5 | 0.17 | WT% | XRF | |
| H2O_MINUS | 0.25 | WT% | XRF | |
| H2O_PLUS | 0.69 | WT% | XRF | |
| TOTAL | 100.02 | WT% | XRF | |
| ZR | 135 | PPM | XRF | |
| Y | 20 | PPM | XRF | |
| SR | 865 | PPM | XRF | |
| RB | 95 | PPM | XRF | |
| TH | 5 | PPM | XRF | |
| PB | 20 | PPM | XRF | |
| GA | 20 | PPM | XRF | |
| ZN | 60 | PPM | XRF | |
| CU | 20 | PPM | XRF | |
| NI | 25 | PPM | XRF | |
| V | 90 | PPM | XRF | |
| CR | 75 | PPM | XRF | |
| BA | 1300 | PPM | XRF | |
| CE | 50 | PPM | XRF | |
| ND | 20 | PPM | XRF | |
| PR | 15 | PPM | XRF | |
| LA | 20 | PPM | XRF | |
| CL | 170 | PPM | XRF | |
| S | 40 | PPM | XRF |