|Quadrangle map, 1:250,000-scale||MG|
|Quadrangle map, 1:63,360-scale||B-6|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This unnamed occurrence is situated on a distinct, northeast-trending ridgeline about 9 kilometers south of the Kuskokwim River and 4 kilometers southwest of VABM Upselat, at an elevation of 1,475 feet (450 m) in the NE1/4 sec. 27, T. 27 N., R. 36 W., of the Seward Meridian. The reporter investigated the site in 1977 and again in 1989 (as station nos. 77BT301 and 89BT69).|
Geologic descriptionThis unnamed occurrence is associated with a small, 2 square kilometer alaskite pluton that intrudes the Late Cretaceous Kuskokwim Group. A prominent northwest trending lineament - possibly a fault - forms the eastern boundary of the alaskite. The alaskite is undated, but thought to be correlative with other Late Cretaceous-early Tertiary plutonic suites in the Kuskokwim Mineral Belt (Bundtzen and Miller, 1997). A stockwork-bearing hornfels that crops out 1.5 kilometers east of the alaskite pluton may indicate a larger intrusion at depth. Mineralization occurs as ferricrete stained, pyritic-quartz veins and breccia in hornfels. Two chip samples collected of mineralized zones average 2.33 grams/tonne silver and 0.68 grams/tonne gold.
|Geologic map unit||(-155.930351390902, 62.3993484476053)|
|Mineral deposit model||Polymetallic vein (Cox and Singer, 1986; model 22c).|
|Mineral deposit model number||22c|
|Alteration of deposit||Ferricrete oxidation common.|
|Workings or exploration||The reporter investigated the site in 1977 as part of an ADGGS minerals appraisal. Two chip samples collected from the mineralized zone in alaskite average 2.33 grams/tonne silver and 0.68 grams/tonne gold.|
|Indication of production||None|
Bundtzen, T.K., and Miller, M.L., 1997, Precious metals associated with Late Cretaceous-early Tertiary igneous rocks of southwestern Alaska, in Goldfarb, R.J., and Miller, L.D., eds., Mineral Deposits of Alaska: Economic Geology Monograph 9, p. 242-286.
|Reporters||T.K. Bundtzen (Pacific Rim Geological Consulting)|
|Last report date||11/25/1998|