Summary of radiometric age determinations of Mesozoic and Cenozoic igneous rocks and uranium and base metal deposits in Colorado
Marvin, R F; Young, E J; Mehnert, H H; Naeser, C W (1974) Summary of radiometric age determinations of Mesozoic and Cenozoic igneous rocks and uranium and base metal deposits in Colorado. Isochron/West, no.11, 41 pp., Dec 1974
| Authors | Marvin, R F; Young, E J; Mehnert, H H; Naeser, C W |
|---|---|
| Year | 1974 |
| Title | Summary of radiometric age determinations of Mesozoic and Cenozoic igneous rocks and uranium and base metal deposits in Colorado |
| Source | Isochron/West, no.11, 41 pp., Dec 1974 |
| ISSN | 0099-6882 |
| GeoRef | 1976-029753 |
| Keywords | absolute age; Cenozoic; Colorado; dates; fission-track; geochronology; igneous rocks; K/Ar; Mesozoic; metal ores; ore deposits; Pb-alpha; Rb/Sr; regional; U/Pb; United States; uranium ores |
| Notes | Data summary of over 400 radiometric age determinations made from 1954-1974 |
78 samples from this reference
| Sample | Rock name | Major | Trace | Isotope |
|---|---|---|---|---|
| 10 | Basalt | |||
| 11 | Andesite | |||
| 12 | Andesite | |||
| 13 | Andesite | |||
| 14 | Andesite | |||
| 15 | Basalt | |||
| 16 | Basalt | |||
| 17 | Basalt | |||
| 18 | Basalt | |||
| 19 | Basalt | |||
| 20 | Basalt | |||
| 21 | Basalt | |||
| 22 | Basalt | |||
| 24 | Basalt | |||
| 25 | Basalt | |||
| 26 | Basalt | |||
| D-7 | Granodiorite | |||
| D-6 | Granodiorite | |||
| 72G-52 | Rhyolite | |||
| 72G42 | Basalt | |||
| 55 | Not given | |||
| 458 | Monzonite | |||
| 67 | Granodiorite | |||
| B743 | Latite | |||
| B1382 | Not given | |||
| B1379 | Latite | |||
| B204 | Latite | |||
| Flag 28-65 | Latite | |||
| R-14 | Latite | |||
| 78 | Monzonite | |||
| 90 Climax Molybdenum Co. | Not given | |||
| 92 Climax Molybdenum Co. | Not given | |||
| 93 Climax Molybdenum Co. | Not given | |||
| 94 Climax Molybdenum Co. | Not given | |||
| 95 Climax Molybdenum Co. | Not given | |||
| T1-F-6-16 | Granodiorite | |||
| 107 | Basalt | |||
| 108 | Basalt | |||
| 120A | Dacite | |||
| 120A | Dacite | |||
| 120B | Rhyolite | |||
| PH-7 | Trachyte | |||
| MR-2 | Monzonite | |||
| MR-1 | Monzonite | |||
| PH-39A | Not given | |||
| 72L-66H | Basalt | |||
| 72L-66B | Basalt | |||
| 68L-1341 | Basalt | |||
| 68L-16A | Basalt | |||
| 66L-26 | Basalt | |||
| 66L-30 | Basalt | |||
| 66L-36 | Basalt | |||
| 66L-98 | Basalt | |||
| V-567 | Andesite | |||
| CM-201 | Granodiorite | |||
| SM-5-72 | Tuff | |||
| SB-1 | Not given | |||
| 68-0-39 | Rhyolite | |||
| OHM-65-01 | Tuff | |||
| OHM-65-02 | Andesite | |||
| 212 | Phonolite | |||
| 212 | Phonolite | |||
| 68-0-40 | Tuff | |||
| 5-70-1 | Rhyolite | |||
| 68-0-42 | Tuff | |||
| 68-0-42 | Tuff | |||
| 68-0-43 | Tuff | |||
| 68-0-43 | Tuff | |||
| RA-3-70 | Tonalite | |||
| SC-594 | Rhyolite | |||
| 71-S-2 | Rhyolite | |||
| SC-595 | Rhyolite | |||
| TRT-1-72 | Pyroclastic-fall | |||
| 230 | Granite | |||
| 231 | Granite | |||
| 232 | Latite | |||
| 234 | Monzonite | |||
| 235 | Tuff |