| Ore minerals | pyrite; pyrrhotite |
|---|
| Quadrangle map, 1:250,000-scale | CG |
|---|---|
| Quadrangle map, 1:63,360-scale | B-2 |
| Latitude | 56.27 |
| Longitude | -158.39 |
| Nearby scientific data | Find additional scientific data near this location |
| Location and accuracy | The approximate location of this occurrence is 1.5 miles south of the village of Chignik (Fields, 1977, locality 8). Site is accurate to within 2 miles. |
Geologic descriptionThis site represents a 3-square-mile color anomaly which generally corresponds in location to a Tertiary quartz diorite stock containing up to 0.25 percent disseminated pyrite. The stock cuts sedimentary rocks of the Tolstoy Formation (Eocene and Paleocene age). The siltstones and sandstones near the intrusive are hornfelsed and carry up to 5 percent pyrrhotite (Fields, 1977). | |
| Geologic map unit | (-158.392033972379, 56.2692219568863) |
|---|---|
| Mineral deposit model | Porphyry copper? (Cox and Singer, 1986; model 17). |
| Mineral deposit model number | 17? |
| Age of mineralization | Tertiary. |
| Workings or exploration | The area was examined by Bear Creek Mining Company during the period 1975-1976 (Fields, 1977). |
|---|---|
| Indication of production | None |
Additional commentsThis site is located on land conveyed to or patented by the Bristol Bay Native Corporation. | |
| MRDS Number | 10307320 |
|---|---|
| Reporters | S.H. Pilcher (Anchorage) |
| Last report date | 2/8/2000 |