| Quadrangle map, 1:250,000-scale | AN |
|---|---|
| Quadrangle map, 1:63,360-scale | A-2 |
| Latitude | 61.17 |
| Longitude | -147.66 |
| Nearby scientific data | Find additional scientific data near this location |
| Location and accuracy | On slope 1 mile north-northeast from terminus of Dartmouth Glacier. Accurate within 3,000 ft. Locality A-16 of Jansons and others (1984). |
Geologic descriptionJansons and others (1984) reported several sub-parallel quartz veins in shear zones in and along margin of a small granitic stock. The veins are 2 to 12 inches wide and contain disseminated grains and massive pods of arsenopyrite and lesser disseminated galena and pyrite. The granitic stock intrudes metasedimentary rocks of the Late Cretaceous Valdez Group. Three chip samples averaged 0.15 oz/ton Au and 0.37 oz/ton Ag. Three grab samples contained traces of gold and up to 0.03 oz/ton Ag (Jansons and others, 1984). | |
| Geologic map unit | (-147.662041108607, 61.1694642812968) |
|---|---|
| Mineral deposit model | Chugach-type low-sulfide Au-quartz veins? (Bliss, 1992; model 36a.1?) or Epithermal Au vein? |
| Mineral deposit model number | 26a.1? |
| Age of mineralization | Late Cretaceous or younger; shear zones and veins cut a small granitic stock which intrudes metasedimentary rocks of the Late Cretaceous Valdez Group. |
| Workings or exploration | Three chip samples averaged 0.15 oz/ton Au and 0.37 oz/ton Ag. Three grab samples contained traces of gold and up to 0.03 oz/ton Ag. This location has moderate mineral development potential (Jansons and others, 1984). |
|---|---|
| Indication of production | None |
| MRDS Number | A106195 |
|---|---|
| Reporters | D.P. Bickerstaff (USGS contractor); S.W. Huss (USGS) |
| Last report date | 7/30/1998 |