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Ammiline

Prospect, Inactive

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Commodities and mineralogy

Main commodities Hg
Other commodities Sb
Ore minerals cinnabar; stibnite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale SM
Quadrangle map, 1:63,360-scale D-4
Latitude 61.80345
Longitude -157.34567
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Ammiline prospect is on a west-facing slope of Parks Creek, about 0.6 mile north-northeast of the mouth of Parks Creek. It is at an elevation of about 430 feet in the SE1/4 sec. 24, T. 20 N., R. 45 W., of the Seward Meridian. The prospect is locality 11 of Miller and others (1989).

Geologic setting

Geologic description

At the Ammiline prospect, cinnabar and minor stibnite in a gangue of fine-grained silica occurs along fractures in an albite rhyolite or granite porphyry dike that intrudes shale and sandstone of the Upper Cretaceous, Kuskokwim Group (Cady and others, 1955; Sainsbury and MacKevett, 1965). The Ammiline prospect is geologically similar to the Fairview prospect (SM019). No other information is available.
Geologic map unit (-157.348049930955, 61.8027602256168)
Mineral deposit model Silica-carbonate mercury (Cox and Singer, 1986; model 27c).
Mineral deposit model number 27c
Age of mineralization Undated; the nearby Fairview prospect (ARDF SM019) has a 40Ar/39Ar age of 72.6 Ma (Gray, Gent, and others, 1997).
Alteration of deposit Albitization of the rhyolite host rock.

Production and reserves

Indication of production None

References

MRDS Number A013436

References

Cady, W.M., Wallace, R.E., Hoare, J.M., and Webber, E.J., 1955, The central Kuskokwim region, Alaska: U.S. Geological Survey Professional Paper 268, 132 p.
Cobb, E.H., 1972, Metallic mineral resources map of the Sleetmute quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-368, 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 Dillingham, Sleetmute, and Taylor Mountains quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-606, 92 p.
Gray, J.E., Gent, C.A., Snee, L.W., and Wilson, F.H., 1997, Epithermal mercury-antimony and gold-bearing vein lodes of southwest Alaska, in Goldfarb, R.J., and Miller, L.D., eds., Mineral Deposits of Alaska: Economic Geology Monograph 9, p. 287-305.
Miller, M.L., Belkin, H.E., Blodgett, R.B., Bundtzen, T.K., Cady, J.W., Goldfarb, R.J., Gray, J.E., McGimsey, R.G., and Simpson, S.L., 1989, Pre-field study and mineral resource assessment of the Sleetmute quadrangle, southwestern Alaska: U.S. Geological Survey Open-File Report 89-363, 115 p., 3 plates, scale 1:250,000.
Sainsbury, C.L., and MacKevett, E.M., Jr., 1965, Quicksilver deposits of southwestern Alaska a description of the quicksilver mines and prospects, with special emphasis on the structural controls of ore deposition: U.S. Geological Survey Bulletin 1187, 89 p.
Reporters T.K. Bundtzen (Pacific Rim Geological Consulting, Inc.) and M.L. Miller (U.S. Geological Survey)
Last report date 5/3/2003