Quadrangle map, 1:250,000-scale | SM |
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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 descriptionAt 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) |
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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. |
Indication of production | None |
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MRDS Number | A013436 |
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ReferencesGray, 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.
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Reporters | T.K. Bundtzen (Pacific Rim Geological Consulting, Inc.) and M.L. Miller (U.S. Geological Survey) |
Last report date | 5/3/2003 |