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Hippie Creek-South

Occurrence, Inactive

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Commodities and mineralogy

Main commodities Ag; Pb
Other commodities Sb; Zn
Ore minerals galena; pyrite; sphalerite; stibnite
Gangue minerals calcite; epidote

Geographic location

Quadrangle map, 1:250,000-scale MG
Quadrangle map, 1:63,360-scale A-2
Latitude 62.215
Longitude -153.715
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Hippie Creek-South occurrence is located on the east side of a cirque basin at an elevation of 4,100 feet (1,250 m) in the SW1/4 sec. 34, T. 25 N., R. 24 W., of the Seward Meridian (prospect #10 of Cobb, 1972). The occurrence is located to within 500 feet (152 m).

Geologic setting

Geologic description

According to Reed and Elliott (1968, C 596), the Hippie Creek-South occurrence consists of locally abundant calcite, pyrite, and galena and minor to trace sphalerite and stibnite (?) in several 2 to 8 cm thick shear zones in limestone of the Terra Cotta Mountains Sandstone, a formation of the lower Paleozoic Dillinger subterrane (Bundtzen and others, 1988, 1997). The mineralized shear zone is parallel to a 6 m thick, pyrite-bearing felsite porphyry dike swarm (Bundtzen and others, 1988). The dikes are undated but a similar plutonic suite to the south yielded a 60.5 Ma age (Solie and others, 1991). The shear zone is discontinuously mineralized.
Analyses cited in Reed and Elliott (1968, C 596) contained greater than 1,000 ppm silver, 1,000 ppm arsenic, greater than 0.50 percent lead, 0.30 percent antimony, and greater than 1.00 percent zinc.
Geologic map unit (-153.71722314784, 62.2143844410267)
Mineral deposit model Lead-zinc skarn deposit (Cox and Singer, 1986; model 18c).
Mineral deposit model number 18c
Age of mineralization Unknown; inferred to be mid-Tertiary, based on isotopic age dating of nearby genetically related plutonic rocks (Solie and others, 1991).

Production and reserves

Workings or exploration The Hippie Creek-South occurrence was found and investigated by the late Bruce Reed during regional geological investigations in the southern Alaska Range by the U.S. Geological Survey (Reed and Elliott, 1968, C 596). Selected analyses contain greater than 1,000 ppm arsenic, greater than 0.50 percent lead, 0.30 percent antimony, and greater than 1.0 percent zinc.
Indication of production None
Reserve estimates None known.

Additional comments

Peripheral to Bowser Creek-Main (MG068), Bowser Creek-Northeast (MG067), and Bowser Creek-Headwaters (MG066) prospects.

References

MRDS Number A015033

References

Bundtzen, T.K., Harris, E.E., and Gilbert, W.G., 1997, Geologic Map of the eastern McGrath quadrangle, Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 97-14, 34 p., 1 sheet, scale 1:125,000.
Bundtzen, T.K., Kline, J.T., Smith, T.E., and Albanese, M.D., 1988, Geology of the McGrath A-2 quadrangle, Alaska: Alaska Division of Geological and Geophysical Surveys Professional Report 91, 18 p., 1sheet, scale 1:63,360.
Cobb, E.H., 1972, Metallic mineral resources map of the McGrath quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-379, 1 sheet, 1:250,000 scale.
Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Iliamna, Lake Clark, Lime Hills, and McGrath quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-485, 101 p.
Reed, B.L. and Elliott, R.L., 1968, Geochemical anomalies and metalliferous deposits between Windy Fork and Post River, southern Alaska: U.S. Geological Survey Circular 569, 22 pages.
Solie, D.N., Bundtzen, T.K., and Gilbert, W.G., 1991, K/Ar ages of igneous rocks in the McGrath quadrangle, Alaska: Alaska Division of Geological and Geophysical Surveys Public Data File 91-23, 7 p., 1 sheet, 1:250,000 scale.
Reporters T.K. Bundtzen (Pacific Rim Geological Consulting)
Last report date 10/30/1998