|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 at an elevation of about 5,500 feet near the head of a north-flowing tributary glacier to Chistochina Glacier. The occurrence is in the SW1/4SW1/4 section 18, T. 20 S., R. 16 E., Fairbanks Meridian. The site corresponds to locality 22 of Rose (1967), locality 23 on figure 6 of Cobb (1979 [OFR 79-238]), and locality 141 in table 2 of Nokleberg and others (1991).|
Geologic descriptionThe rocks in the vicinity of the occurrence are argillite, probably of the Eagle Creek Formation of Early Permian age (Richter and Dutro, 1975), a unit formerly assigned to the Mankomen Formation. The rock has been pyritized. An assay showed a trace of gold and 0.12 ounce of silver per ton (Rose, 1967).
|Geologic map unit||(-144.767231145226, 63.1754063296234)|
|Age of mineralization||Early Permian or younger.|
|Alteration of deposit||Pyritization.|
|Workings or exploration||The mineral site is a natural outcrop; only limited surface sampling has been done.|
|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.
Richter, D.H., and Dutro, J.T., Jr., 1975, Revision of the type Mankomen Formation (Pennsylvanian and Permian), Eagle Creek area, eastern Alaska Range, Alaska: U.S. Geological Survey Bulletin 1395-B, p. B1-B25.
|Reporters||W.T. Ellis (Alaska Earth Sciences), C.C. Hawley (Hawley Resource Group), and W.J. Nokleberg (USGS)|
|Last report date||7/12/2003|