Sample RDS79
NavDat sample number 36748 · DACITE
Sample
| Sample ID | RDS79 |
|---|---|
| Rock name | DACITE |
| Rock type | VOLCANIC |
| Composition | FELSIC |
| Material | IGNEOUS |
| Comment | Low Y dacite |
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 |
|---|---|---|---|---|---|
| 34.6 | 34.7 | 35.5 |
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|---|---|---|---|
| SIO2 | 67 | WT% | XRF | |
| TIO2 | 0.76 | WT% | XRF | |
| AL2O3 | 15.6 | WT% | XRF | |
| FEO | 4.16 | WT% | XRF | |
| MGO | 1.61 | WT% | XRF | |
| CAO | 3.53 | WT% | XRF | |
| NA2O | 3.86 | WT% | AAS | |
| K2O | 3.28 | WT% | XRF | |
| P2O5 | 0.22 | WT% | XRF | |
| LOI | 2.26 | WT% | XRF | |
| TOTAL | 99.66 | WT% | XRF | |
| RB | 105 | PPM | XRF | |
| SR | 452 | PPM | XRF | |
| BA | 1187 | PPM | XRF | |
| LA | 36 | PPM | XRF | |
| NB | 11 | PPM | XRF | |
| ZR | 214 | PPM | XRF | |
| Y | 18 | PPM | XRF | |
| PB | 13.6 | PPM | ICPMS | |
| TH | 12.6 | PPM | ICPMS | |
| U | 4 | PPM | ICPMS | |
| CE | 65.2 | PPM | MS-ID | |
| ND | 25.5 | PPM | MS-ID | |
| SM | 4.53 | PPM | MS-ID | |
| EU | 1.21 | PPM | MS-ID | |
| GD | 3.65 | PPM | MS-ID | |
| DY | 2.95 | PPM | MS-ID | |
| ER | 1.62 | PPM | MS-ID | |
| YB | 1.54 | PPM | MS-ID | |
| SR87_SR86 | 0.70464 | MS | ||
| SR87_SR86_INITIAL | 0.704313 | MS | ||
| ND143_ND144 | 0.512641 | MS | ||
| PB206_PB204 | 18.68 | MS | ||
| PB207_PB204 | 15.62 | MS | ||
| PB208_PB204 | 38.29 | 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