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Wyoming

Occurrence, Probably inactive

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Commodities and mineralogy

Main commodities Au
Other commodities As
Ore minerals arsenopyrite; pyrite; pyrrhotite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale NM
Quadrangle map, 1:63,360-scale D-1
Latitude 64.818
Longitude -165.2466
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Wyoming vein crops out in Dorothy Creek (NM097) above the confluence with Short Creek, a west tributary. It is at an elevation of about 700 feet. This is locality 20 of Hummel (1962 [MF 248]) and locality 58 of Hummel (1975).

Geologic setting

Geologic description

Hummel (1962 [MF 248]) reported arsenopyrite, pyrite, and possibly pyrrhotite at this locality. Dorothy Creek (NM097) is auriferous, and Collier and others (1908) noted numerous quartz veins in schist bedrock of the drainage. The Wyoming prospect is apparently an arsenopyrite- and (or) pyrite-bearing vein. Antimony occurrences (NM068 and NM069) and the Bulk Gold prospects (NM071 and NM072) occur on the ridge along the southwest headwaters of Dorothy Creek . Bladed stibnite crystals were common in placer concentrates recovered from Dorothy Creek (Anderson, 1947).
Geologic map unit (-165.249222733263, 64.8172422051717)
Mineral deposit model Arsenopyrite- and (or) pyrite-bearing vein in metamorphic rocks.
Age of mineralization Mid-Cretaceous or younger; postdates regional metamorphism.

Production and reserves

Workings or exploration Prospect pits.
Indication of production None

References

References

Anderson, Eskil, 1947, Mineral occurrences other than gold deposits in northwestern Alaska: Alaska Territorial Division of Mines Pamphlet 5-R, 48 p.
Collier, A.J., Hess, F.L., Smith, P.S., and Brooks, A.H., 1908, The gold placers of parts of Seward Peninsula, Alaska, including the Nome, Council, Kougarok, Port Clarence, and Goodhope precincts: U.S. Geological Survey Bulletin 328, 343 p.
Hummel, C.L., 1962, Preliminary geologic map of the Nome D-1 quadrangle, Seward Peninsula, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-248, 1 sheet, scale 1:63,360.
Hummel, C.L., 1975, Mineral deposits and occurrences, and associated altered rocks in southwest Seward Peninsula, western Alaska: U.S. Geological Survey Open-File Report 75-2, 1 sheet, scale 1:125,000.
Reporters C.C. Hawley and Travis L. Hudson
Last report date 10/22/1999