| Quadrangle map, 1:250,000-scale | CR |
|---|---|
| Quadrangle map, 1:63,360-scale | A-3 |
| Latitude | 55.20305 |
| Longitude | -132.93498 |
| Nearby scientific data | Find additional scientific data near this location |
| Location and accuracy | This occurrence is on the west coast of Goat Island about 0.3 mile east-southeast of triangulation station Timmy. It is about 0.5 mile northwest of the southeast corner of section 8, T. 77 S., R. 83 E., of the Copper River Meridian. |
Geologic descriptionThis occurrence was discovered during a search for the source of a gold geochemical anomaly (Maas and others, 1991; Hedderly-Smith, 1999 [Inventory]). The rocks in the vicinity consist of argillite with subordinate volcanic flows, agglomerate, and chert. The argillite is locally silicified and contains small pods of massive pyrite. A sample from a quartz stockwork with 50 percent pyrite and intense hematite and limonite staining contained 0.564 parts per million (ppm) gold and 2.0 ppm silver (Maas and others, 1991). | |
| Geologic map unit | (-132.936624733642, 55.2027037340302) |
|---|---|
| Mineral deposit model | Insufficient evidence. |
| Alteration of deposit | A sample from a quartz stockwork with 50 percent pyrite has intense hematite and limonite staining. |
| Workings or exploration | Only surface sampling by government agency. |
|---|---|
| Indication of production | None |
ReferencesHedderly-Smith, D.A., 1999, Inventory of metallic mineral prospects, showings and anomalies on Sealaska lands, 1988 through 1998: Sealaska Corporation, Juneau, Alaska, 217 p. (internal report held by Sealaska Corporation, Juneau, Alaska).
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| Reporters | D.J. Grybeck (Applied Geology) |
|---|---|
| Last report date | 5/1/2004 |