| Quadrangle map, 1:250,000-scale | MH |
|---|---|
| Quadrangle map, 1:63,360-scale | A-4 |
| Latitude | 63.0064 |
| Longitude | -145.5712 |
| Nearby scientific data | Find additional scientific data near this location |
| Location and accuracy | This occurrence is at an elevation of 4,500 feet approximately one-half mile southeast of the top of Paxson Mountain. It is in an east-flowing creek in the NE1/4SE1/4 section 14, T. 22 S., R. 11 E., Fairbanks Meridian. This site corresponds to locality S97 in table 2 of Nokleberg and others (1991). |
Geologic descriptionAt this locality bornite occurs in 1-centimeter-wide quartz veins that cut Nikolai Greenstone metabasalt of Late Triassic age (Nokleberg and others, 1991). Copper minerals also occur in amygdules in metabasalt. A composite chip sample across a 6.5-foot zone of malachite and azurite in amygdules contained 2.6 percent copper and 20 parts per million silver (Nokleberg and others, 1991). | |
| Geologic map unit | (-145.573419409753, 63.0059781135382) |
|---|---|
| Mineral deposit model | Basaltic Cu (Cox and Singer, 1986; model 23). |
| Mineral deposit model number | 23 |
| Age of mineralization | Late Triassic and Cretaceous. |
| Alteration of deposit | The vesicular basalt host rock is altered in part to chlorite and epidote; copper mineral(s) are oxidized. |
| Workings or exploration | A composite chip sample across a 6.5-foot zone of malachite and azurite in amygdules contained 2.6 percent copper and 20 parts per million silver (Nokleberg and others, 1991). |
|---|---|
| Indication of production | None |
References | |
| Reporters | W.T. Ellis (Alaska Earth Science), C.C. Hawley (Hawley Resource Group), and W.J. Nokleberg (USGS) |
|---|---|
| Last report date | 6/19/2002 |