|Quadrangle map, 1:250,000-scale||MH|
|Quadrangle map, 1:63,360-scale||A-2|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||The occurrence is about 2 miles northwest of the terminus of the Chistochina Glacier. It is about 0.2 mile east-northeast of peak 5990 in the NW1/4NE1/4 section 4, T. 20 S., R. 15 E., Fairbanks Meridian. The occurrence corresponds to locality 16 on figure 1 of Rose (1967), locality 7 on figure 6 of Cobb (1979 [OFR 79-238]), and locality 131 in table 2 of Nokleberg and others (1991). The location is probably accurate within 0.2 mile.|
Geologic descriptionThe metavolcanic rocks in the vicinity of the occurrence are chiefly amphibolite and derived from the Nikolai Greenstone of Late Triassic age; the rocks were earlier mapped as Mankomen Formation of Permian age (Nokleberg and others, 1991; Rose, 1967). The metavolcanic rocks are cut by quartz veins that contain pyrite, pyrrhotite, possibly pentlandite, and a trace of chalcopyrite. Sample 6E537 collected by Rose (1967, table 5) contained 0.02 ounce of gold per ton, 0.14 ounce of silver per ton, and detectable trace amounts of copper and nickel. Sample 79IL067C collected at the site by Nokleberg and others (1991) contained 10 parts per million molybdenum. Stream-sediment samples collected below the site were anomalous in zinc and molybdenum (Rose, 1967).
|Geologic map unit||(-144.883530335626, 63.2154049462476)|
|Mineral deposit model||Basaltic Cu (Cox and Singer, 1986; model 23).|
|Mineral deposit model number||23|
|Age of mineralization||Post-Late Triassic, on the basis of the age of the host rock.|
|Alteration of deposit||Sulfidization of amphibolite.|
|Indication of production||None|
Cobb, E.H., 1979, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Mount Hayes quadrangle, Alaska: U.S. Geological Survey Open-File Report 79-238, 140 p.
Nokleberg, W.J., Lange, I.M., Roback, R.C., Yeend, Warren, and Silva, S.R., 1991, Map showing locations of metalliferous lode and placer mineral occurrences, mineral deposits, prospects, and mines, Mount Hayes quadrangle, eastern Alaska Range, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1996-C, 42 p., 1 sheet, scale 1:250,000.
|Reporters||W.T. Ellis (Alaska Earth Sciences), C.C. Hawley (Hawley Resource Group), and W.J. Nokleberg (USGS)|
|Last report date||7/1/2003|