| Main commodities | Cu |
|---|---|
| Other commodities | Ag; Mo |
| Ore minerals | chalcopyrite; molybdenite |
| Quadrangle map, 1:250,000-scale | CG |
|---|---|
| Quadrangle map, 1:63,360-scale | A-1 |
| Latitude | 56.21 |
| Longitude | -158.31 |
| Nearby scientific data | Find additional scientific data near this location |
| Location and accuracy | This site is located approximately on the point between the northwest and southwest arms of Castle Bay (MacKevett and Holloway, 1977, locality 26). Site location is accurate to within 2 miles. |
Geologic descriptionThis site is described as an altered zone in Tertiary intrusive and volcanic rocks (MacKevett and Holloway, 1977). Fields (1977) reports a 3/4-square-mile color anomaly associated with a small quartz diorite body in this general area. A silt sample collected by Bear Creek Mining Company from a northeast-flowing drainage approximately 1 mile west of the site as plotted contained 138 ppm copper and 3.4 ppm molybdenum. Sparse chalcopyrite was noted in quartz diorite boulders. | |
| Geologic map unit | (-158.312028679315, 56.2092237488034) |
|---|---|
| Mineral deposit model | Porphyry copper? (Cox and Singer, 1986; model 17). |
| Mineral deposit model number | 17? |
| Age of mineralization | Tertiary. |
| Workings or exploration | Bear Creek Mining Company did limited exploration at this occurrence during the period 1975-1976. |
|---|---|
| Indication of production | None |
Additional commentsThis site is located on land conveyed to or patented by the Bristol Bay Native Corporation. | |
| MRDS Number | 10307315 |
|---|---|
| Reporters | S.H. Pilcher (Anchorage) |
| Last report date | 2/8/2000 |