Sample RDS78
NavDat sample number 36749 · DACITE
Sample
| Sample ID | RDS78 |
|---|---|
| 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 | 68.3 | WT% | XRF | |
| TIO2 | 0.64 | WT% | XRF | |
| AL2O3 | 15.6 | WT% | XRF | |
| FEO | 3.56 | WT% | XRF | |
| MGO | 1.12 | WT% | XRF | |
| CAO | 2.65 | WT% | XRF | |
| NA2O | 4.3 | WT% | AAS | |
| K2O | 3.68 | WT% | XRF | |
| P2O5 | 0.19 | WT% | XRF | |
| LOI | 2.35 | WT% | XRF | |
| TOTAL | 98.74 | WT% | XRF | |
| RB | 119 | PPM | XRF | |
| SR | 329 | PPM | XRF | |
| BA | 1153 | PPM | XRF | |
| LA | 47 | PPM | XRF | |
| NB | 17 | PPM | XRF | |
| ZR | 300 | PPM | XRF | |
| Y | 26 | PPM | XRF | |
| NI | 8 | PPM | XRF | |
| SC | 7 | PPM | XRF | |
| PB | 15.8 | PPM | ICPMS | |
| TH | 14.1 | PPM | ICPMS | |
| U | 4.4 | PPM | ICPMS | |
| CE | 81.6 | PPM | MS-ID | |
| ND | 32 | PPM | MS-ID | |
| SM | 5.67 | PPM | MS-ID | |
| EU | 1.37 | PPM | MS-ID | |
| GD | 4.74 | PPM | MS-ID | |
| DY | 4.14 | PPM | MS-ID | |
| ER | 2.38 | PPM | MS-ID | |
| YB | 2.37 | PPM | MS-ID | |
| SR87_SR86 | 0.704762 | MS | ||
| SR87_SR86_INITIAL | 0.704253 | MS | ||
| ND143_ND144 | 0.512645 | MS | ||
| PB206_PB204 | 18.56 | MS | ||
| PB207_PB204 | 15.62 | MS | ||
| PB208_PB204 | 38.41 | 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