Sample 13-Apr
NavDat sample number 31679 · BASALT
Sample
| Sample ID | 13-Apr |
|---|---|
| Rock name | BASALT |
| Rock type | VOLCANIC |
| Composition | MAFIC |
| Material | IGNEOUS |
| Comment | Flows, dikes, and plugs of olivine-phyric alkali basalt that locally contain mantle xenoliths. |
Location
| Latitude | 36.25 |
|---|---|
| Longitude | -113.833 |
| Location | Grand Wash Trough |
| State / province | Arizona |
| Volcanic field | Lake Mead area |
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|---|---|---|---|---|
| 5.45 | 3.99 | 6.9 |
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|---|---|---|---|
| SIO2 | 47.58 | WT% | ICP | |
| AL2O3 | 14.4 | WT% | ICP | |
| FEO | 14.53 | WT% | ICP | |
| CAO | 8.74 | WT% | ICP | |
| MGO | 8.55 | WT% | ICP | |
| NA2O | 3 | WT% | ICP | |
| K2O | 1.55 | WT% | ICP | |
| TIO2 | 1.25 | WT% | ICP | |
| MNO | 0.19 | WT% | ICP | |
| P2O5 | 0.26 | WT% | ICP | |
| CR | 326 | PPM | INAA | |
| CO | 50.49 | PPM | INAA | |
| SC | 27 | PPM | INAA | |
| V | 242 | PPM | INAA | |
| HF | 3.14 | PPM | INAA | |
| LA | 9.04 | PPM | INAA | |
| CE | 21.87 | PPM | INAA | |
| EU | 0.95 | PPM | INAA | |
| YB | 1.96 | PPM | INAA | |
| LU | 0.3 | PPM | INAA | |
| SR | 321.83 | PPM | MS-ID | |
| RB | 7.47 | PPM | MS-ID | |
| ND | 14.35 | PPM | MS-ID | |
| ND143_ND144 | 0.512295 | MS | ||
| SR87_SR86_INITIAL | 0.7046 | MS | ||
| PB206_PB204 | 17.821 | MS | ||
| PB207_PB204 | 15.55 | MS | ||
| PB208_PB204 | 38.05 | MS |
References
- Feuerbach, Dan L; Smith, Eugene I; Walker, J D; Tangeman, J A (1993) The role of the mantle during crustal extension; constraints from geochemistry of volcanic rocks in the Lake Mead area, Nevada and Arizona. Geological Society of America Bulletin, vol.105, no.12, pp.1561-1575, Dec 1993 doi:10.1130/0016-7606(1993)105<1561:TROTMD>2.3.CO;2