| Quadrangle map, 1:250,000-scale | DE |
|---|---|
| Quadrangle map, 1:63,360-scale | D-2 |
| Latitude | 54.8955 |
| Longitude | -132.3642 |
| Nearby scientific data | Find additional scientific data near this location |
| Location and accuracy | The Cordova Group consists of 8 claims about one-quarter mile north of the abandoned village of Klinkwan. The claims are just west of the head of the northwest arm of Klinkwan Cove, near the center of the NW1/4 section 31, T. 80 S., R. 87 E. |
Geologic descriptionJust above the high tide line at the head of the northwest arm of Klinkwan Cove, a small pit exposes carbonaceous slate that is cut by quartz stringers that contain some pyrite and chalcopyrite (Wilcox, 1937 [PE 121-2]). Wilcox collected two samples of the most highly mineralized slate-quartz rock; the best one contained 2.08 ounces of gold per ton and 0.6 ounce of silver per ton. About one-quarter mile 'back' of Klinkwan, an outcrop of greenstone is highly fractured. The fractures, which vary from 1 to 10 inches wide, are filled with calcite that contain sparse, disseminated pyrite and chalcopyrite, some of which is altered to bornite. A sample of the most highly mineralized material contained only a trace of gold and silver. Gehrels (1992) has mapped the rocks in the area as mudstone and siltstone of the Devonian Karheen Formation; several major, northwest-trending faults are nearby. | |
| Geologic map unit | (-132.365862840716, 54.8951576162884) |
|---|---|
| Mineral deposit model | Sulfide-bearing, quartz and calcite veinlets in slate and greenstone. |
| Age of mineralization | The mineralized fractures cut Devonian rocks. |
| Workings or exploration | Only a few surface pits. |
|---|---|
| Indication of production | None |
Additional commentsThese prospects are in the South Prince of Wales Wilderness, which is closed to prospecting and mineral exploration. | |
References | |
| Reporters | D.J. Grybeck (Applied Geology) |
|---|---|
| Last report date | 9/1/2003 |