|Quadrangle map, 1:250,000-scale||AN|
|Quadrangle map, 1:63,360-scale||A-2|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||Located near the mouth of Miners River, on the east side of Unakwik Bay. It should be noted that the Cobb (1972) locality is plotted too far upstream on MF 409. Accurate within 1 mile. Locality 65 of Cobb (1972), locality 53 of MacKevett and Holloway (1977), locality 73 of Hoekzema (1984) and locality A-14 of Jansons and others (1984).|
A 'vein' or zone that has no sharply defined walls in the diorite country rock has been pyritized in a zone 10-20 ft wide. This sulfide-bearing rock is iron-stained and contains pegmatitic veins which also carry pyrrhotite. These veins are 0.25 to 2 inches in width and are not sharply defined (Grant, 1906). The pyrrhotite disseminated in the pegmatitic veins carry nickel, cobalt, and copper (Hoekzema and Fechner, 1986).Chip samples contained from 400 ppm to 2,000 ppm Ni, 93 ppm to 2,000 ppm Co, and 100 ppm to 2,000 ppm Cu. Grab samples contained from 20 ppm to 2,000 ppm Ni, 36 to 800 ppm Co, and 20 ppm to 1,000 ppm Cu. A 260 lb bulk sample contained 2,500 ppm Ni, 200 ppm Co, and 3,100 ppm Cu (Hoekzema, 1984).
|Geologic map unit||(-147.412074596989, 61.0894681292874)|
|Age of mineralization||Tertiary or younger.|
|Alteration of deposit||Pyritization of diorite country rock.|
|Workings or exploration||Exploration consists of an 8 ft and an 218 ft adit. Chip samples contained from 400 ppm to 2,000 ppm Ni, 93 ppm to 2,000 ppm Co, and 100 ppm to 2,000 ppm Cu. Grab samples contained from 20 ppm to 2,000 ppm Ni, 36 to 800 ppm Co, and 20 ppm to 1,000 ppm Cu. A 260 lb bulk sample contained 2,500 ppm Ni, 200 ppm Co, and 3,100 ppm Cu. These results indicate low mineral potential (Hoekzema, 1984).|
|Indication of production||Undetermined|
|Reserve estimates||Webber and Rutledge (1944) stated that inferred reserves are 11,000 tons at 0.2 percent Ni and 0.2 percent Cu.|
Additional commentsCobb (1972) located this site north of Miners Lake, however Grant (1906) whom serves as Cobb primary references, indicate that it is where Miners River enters into Miners Bay.
Hoekzema, R.B., and Fechner, S.A., 1986, Placer Gold sampling in and near the Chugach National Forest, Alaska: U.S. Bureau of Mines Information Circular 9091, 42 p.
|Reporters||D.P. Bickerstaff (USGS contractor); S.W. Huss (USGS)|
|Last report date||7/30/1998|