Sample RDS49
NavDat sample number 36741 · IGNIMBRITE
Sample
| Sample ID | RDS49 |
|---|---|
| Rock name | IGNIMBRITE |
| Rock type | VOLCANIC |
| Composition | FELSIC |
| Material | IGNEOUS |
| Comment | High Y upper ignimbrite |
Location
| Latitude | 27.9 |
|---|---|
| Longitude | -104.267 |
| Location | La Olivina xenolith locality |
| State / province | CHIHUAHUA |
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|---|---|---|---|---|
| 31.4 | 30.7 | 32.1 |
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|---|---|---|---|
| SIO2 | 75.5 | WT% | XRF | |
| TIO2 | 0.21 | WT% | XRF | |
| AL2O3 | 12.4 | WT% | XRF | |
| FEO | 1.93 | WT% | XRF | |
| MNO | 0.03 | WT% | AAS | |
| MGO | 0.14 | WT% | XRF | |
| CAO | 0.55 | WT% | XRF | |
| NA2O | 3.32 | WT% | AAS | |
| K2O | 5.97 | WT% | XRF | |
| P2O5 | 0.01 | WT% | XRF | |
| LOI | 0.65 | WT% | XRF | |
| TOTAL | 99.15 | WT% | XRF | |
| RB | 288 | PPM | XRF | |
| SR | 27 | PPM | XRF | |
| BA | 77 | PPM | XRF | |
| LA | 84 | PPM | XRF | |
| NB | 47 | PPM | XRF | |
| ZR | 290 | PPM | XRF | |
| Y | 56 | PPM | XRF | |
| PB | 24.6 | PPM | ICPMS | |
| TH | 38.2 | PPM | ICPMS | |
| U | 8.9 | PPM | ICPMS | |
| CE | 155.2 | PPM | MS-ID | |
| ND | 54.7 | PPM | MS-ID | |
| SM | 9.73 | PPM | MS-ID | |
| EU | 0.32 | PPM | MS-ID | |
| GD | 7.71 | PPM | MS-ID | |
| DY | 7.97 | PPM | MS-ID | |
| ER | 4.96 | PPM | MS-ID | |
| YB | 5.3 | PPM | MS-ID | |
| SR87_SR86 | 0.727907 | MS | ||
| SR87_SR86_INITIAL | 0.714836 | MS | ||
| ND143_ND144 | 0.512535 | MS | ||
| PB206_PB204 | 18.71 | MS | ||
| PB207_PB204 | 15.68 | MS | ||
| PB208_PB204 | 38.67 | MS |
References
- McDowell, Fred W; Mauger, Richard L (1994) K-Ar and U-Pb zircon chronology of Late Cretaceous and Tertiary magmatism in central Chihuahua State, Mexico; with Suppl. Data 9403. Geological Society of America Bulletin, vol.106, no.1, pp.118-132, Jan 1994 doi:10.1130/0016-7606(1994)106<0118:KAAUPZ>2.3.CO;2