| Quadrangle map, 1:250,000-scale | HE |
|---|---|
| Quadrangle map, 1:63,360-scale | A-6 |
| Latitude | 63.21 |
| Longitude | -149.61 |
| Nearby scientific data | Find additional scientific data near this location |
| Location and accuracy | The Silverdikes prospect is at an elevation of about 2,900 feet, about 1.7 miles southwest of Lookout Mountain. The map site is in the SW1/4 of sec. 2, T. 20 S., R. 11 W., of the Fairbanks Meridian. The location is accurate to within one mile. |
Geologic descriptionThe Silverdikes prospect is on the Chulitna fault. The country rocks are Upper Jurassic to Upper Triassic crystal tuff, argillite, graywacke, and chert, cut by Upper Cretaceous or Lower Tertiary, fine-grained quartz porphyry dikes. The deposit apparently consists of galena- and sphalerite-bearing quartz veins, but their hostrock is not specified. The dikes contain disseminated pyrite. Geochemically anomalous silver, lead and zinc values are reported (unpublished report, Addwest Minerals International, Ltd, 1997). The Silverdikes prospect closely resembles the deposit at Lookout Mountain (HE032). | |
| Geologic map unit | (-149.612289905542, 63.2095264005319) |
|---|---|
| Mineral deposit model | Polymetallic vein (Cox and Singer, 1986; model 22c) |
| Mineral deposit model number | 22c |
| Age of mineralization | Late Cretaceous or younger. |
| Alteration of deposit | Minor sericitic-phyllic alteration reported. |
| Workings or exploration | Surface sampling only. |
|---|---|
| Indication of production | None |
Additional commentsAlso see Lookout Mountain (HE032). | |
| MRDS Number | 10307515 |
|---|---|
| Reporters | N. Van Wyck (Stevens Exploration Management Corporation) |
| Last report date | 4/7/2000 |