| Main commodities | Mo |
|---|---|
| Ore minerals | molybdenite |
| Gangue minerals | feldspar and quartz (aplite) |
| Quadrangle map, 1:250,000-scale | BC |
|---|---|
| Quadrangle map, 1:63,360-scale | B-3 |
| Latitude | 56.39 |
| Longitude | -130.98 |
| Nearby scientific data | Find additional scientific data near this location |
| Location and accuracy | This unnamed occurrence (Elliott and Koch, 1981, p. 8, loc. 12) is at an elevation of about 2400 feet on a ridge between Blue River and West Fork of Blue River. It is on or near the boundary of Sections 24 and 25, and about 0.4 mile south-southwest of the Alaska-British Columbia boundary. The location is accurate to within about a quarter of a mile. |
Geologic descriptionThe country rocks in the general area of this occurrence comprise a stock of Eocene leucocratic quartz monzonite and granodiorite (Elliott and Koch, 1981; Koch, 1996). The occurrence consists of a float sample collected by the U. S. Geological Survey in 1979 (Elliott and Koch, 1981, loc. 12). The sample consists of aplite rubble that contains up to about 0.5% visible molybdenite. All of the rubble at the locality is aplite, but not all of it contains visible molybdenite. The association of molybdenite, aplite, and leucocratic quartz monzonite suggests a porphyry-molybdenum deposit model. | |
| Geologic map unit | (-130.981708010493, 56.3896552543115) |
|---|---|
| Mineral deposit model | Porphyry molybdenum (Cox and Singer, 1986; model 21b)? |
| Mineral deposit model number | 21b? |
| Age of mineralization | Eocene? |
| Indication of production | None |
|---|---|
Additional commentsThis occurrence is in Misty Fiords National Monument. | |
| MRDS Number | A010204 |
|---|---|
| Reporters | H. C. Berg (Fullerton, California) |
| Last report date | 5/17/1998 |