|Quadrangle map, 1:250,000-scale||WI|
|Quadrangle map, 1:63,360-scale||B-1|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is at an elevation of about 3,250 feet on the divide between Fay creek and Swift Creek. It is just north of the center of the southern boundary of section 23, T. 31 N., R. 12 W., of the Fairbanks Meridian. The location is accurate.|
Geologic descriptionBrosge and Reiser (1972) collected a series of soil and rock samples, and quartz veins for approximately 0.5 mile across this area. The quartz veins contain elevated gold, silver, antimony, and arsenic. One of the samples, described as a thin quartz vein contains 5.8 and 0.97 ppm gold in replicate analyses. Eden (2000) reported quartz veins with arsenopyrite and pyrite exposed in a trench in the same general area. Several trench and outcrop samples of oxidized, pyrite- or arsenopyrite-bearing quartz contained up to 90 ppb gold and 4,760 arsenic. The veins strike east-west and dip steeply. The pyrite and arsenopyrite form euhedral crystals in open spaces. The rocks in the area are Upper Devonian quartz-mica schist, phyllite, and micaceous schist (Eden, 2000).
|Geologic map unit||(-150.159550188045, 67.4890753094557)|
|Mineral deposit model||Low-sulfide Au-quartz vein (Cox and Singer, 1986; model 36a)|
|Mineral deposit model number||36a|
|Alteration of deposit||Iron-oxide alteration.|
|Workings or exploration||Surface sampling and trenching.|
|Indication of production||None|
Additional commentsSee also: Smith Creek Dome (WI110).
Cobb, E.H., 1972, Metallic mineral resources map of the Wiseman quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-469, 1 sheet, scale 1:250,000
Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Chandalar and Wiseman quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-340, 205 p.
Dillon, J.T., 1982, Source of lode and placer gold deposits of the Chandalar and upper Koyukuk Districts: Alaska Division of Geological and Geophysical Surveys Open-File Report AOF-158, 25 p., 1 sheet, scale 1:250,000.
Eden, K., 2000, Geology and gold mineralization of the Nolan area in the Brooks Range, Alaska: U.S. Bureau of Land Management Open-File Report 78, 87 p.
|Reporters||J.M. Britton (Anchorage)|
|Last report date||8/9/2002|