|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||This occurrence is near the mouth of Slate Creek, near the center of the W1/2NW1/4 section 22, T. 20 S., R. 15 E., Fairbanks Meridian. The occurrence corresponds to locality 24 of Rose (1967), locality 17 on figure 6 of Cobb (1979 [OFR 79-238]), locality 48 of MacKevett and Holloway (1977), and locality 136 in table 2 of Nokleberg and others (1991). The location is accurate within 0.1 mile.|
Geologic descriptionRocks in the vicinity of the occurrence consist mainly of andesite and dacite of Pennsylvanian age northwest of a dike-like body of quartz monzonite of Mesozoic age (Rose, 1967). The volcanic rocks are highly pyritized and contain weakly disseminated chalcopyrite (MacKevett and Holloway, 1977). A sample of pyritized volcanic rocks contained a trace of gold, 0.12 ounce of silver per ton, and 0.15 percent copper (Rose, 1967).
|Geologic map unit||(-144.865427040287, 63.1700026623526)|
|Mineral deposit model||Porphyry Cu (Cox and Singer, 1986; model 20c).|
|Mineral deposit model number||20c|
|Age of mineralization||The mineralization is either syngenetic and related to the Pennsylvanian volcanic rocks or epigenetic, related to the Mesozoic quartz monzonite body.|
|Alteration of deposit||Pyritization of volcanic rocks.|
|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.
MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous and selected non-metalliferous mineral deposits in the eastern part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-A, 99 p., 1 sheet, scale 1:1,000,000.
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||7/9/2003|