Mineral Queen (ARDF #JU208) Ag, Au, Cu

Mineral Queen

Prospect, Inactive

Commodities and mineralogy

Main commodities	Ag; Au; Cu
Other commodities	Mo
Ore minerals	chalcopyrite; molybdenite; pyrite; pyrrhotite
Gangue minerals	quartz

Geographic location

Quadrangle map, 1:250,000-scale	JU
Quadrangle map, 1:63,360-scale	B-2
Latitude	58.2546
Longitude	-134.3472
Nearby scientific data	Find additional scientific data near this location
Location and accuracy	The Mineral Queen prospect is at an elevation of approximately 100 feet on Douglas Island, on the southwest shore of Gastineau Channel near the mouth of Ready Bullion Creek. It is in the NE1/4SE1/4 section 6, T. 42 S., R. 68 E. of the Copper River Meridian. The location is accurate.

Geologic setting

Geologic description The Mineral Queen prospect was discovered before 1887 and was developed by a 410-foot adit, a 40-foot adit, a 18-foot adit, an open cut and several trenches. The deposit is in phyllite, chlorite schist and coarse- to fine-grained amphibolite that contains disseminated pyrite, pyrrhotite, and chalcopyrite (Redman and others, 1989). Shearing has converted some of the amphibolite to chlorite phyllite that contains quartz veins up to 6 feet thick. Some of the veins contain fragments of altered albite-diorite. Pyrite cubes and molybdenite occur in the margins of the veins and along the foliation of the chlorite phyllite. U.S. Bureau of Mines samples contained up to 441 ppm gold, 34 ppm silver, 1,184 ppm copper, and 0.13 percent molybdenum (Redman and others, 1989). The rocks in the general area are Upper Jurassic or Cretaceous marine argillite and graywacke, interbedded with andesite or basalt (Brew and Ford, 1985). The bedded rocks are regionally metamorphosed to prehnite-pumpellyite or greenschist grade, and cut by diorite or gabbro dikes and sills.
Geologic map unit	(-134.348966353028, 58.2542712456324)

Geologic description

The Mineral Queen prospect was discovered before 1887 and was developed by a 410-foot adit, a 40-foot adit, a 18-foot adit, an open cut and several trenches. The deposit is in phyllite, chlorite schist and coarse- to fine-grained amphibolite that contains disseminated pyrite, pyrrhotite, and chalcopyrite (Redman and others, 1989). Shearing has converted some of the amphibolite to chlorite phyllite that contains quartz veins up to 6 feet thick. Some of the veins contain fragments of altered albite-diorite. Pyrite cubes and molybdenite occur in the margins of the veins and along the foliation of the chlorite phyllite. U.S. Bureau of Mines samples contained up to 441 ppm gold, 34 ppm silver, 1,184 ppm copper, and 0.13 percent molybdenum (Redman and others, 1989).

The rocks in the general area are Upper Jurassic or Cretaceous marine argillite and graywacke, interbedded with andesite or basalt (Brew and Ford, 1985). The bedded rocks are regionally metamorphosed to prehnite-pumpellyite or greenschist grade, and cut by diorite or gabbro dikes and sills.

Geologic map unit

(-134.348966353028, 58.2542712456324)

Production and reserves

Workings or exploration	The Mineral Queen prospect was discovered before 1887 and was developed by a 410-foot adit, a 40-foot adit, a 18-foot adit, an open cut, and several trenches.
Indication of production	None

References

References Brew, D.A., and Ford, A.B., 1985, Preliminary reconnaissance geologic map of the Juneau, Taku River, Atlin, and part of the Skagway 1:250,000 quadrangles, southeastern Alaska: U.S. Geological Survey Open-File Report 85-395, 23 p., 2 sheets, scale 1:250,000. Redman, E.C., Maas, K.M., Kurtak, J.M., and Miller, L.D., 1991, Section D: Juneau Gold Belt subarea, in U.S. Bureau of Mines, Mineral investigations in the Juneau Mining District, Alaska, 1984-1988: Volume 2 - Detailed mine, prospect, and mineral occurrence descriptions: U.S. Bureau of Mines Special Publication VOL. 2D, 424 p., 19 sheets.
Reporters	J.C. Barnett and L.D. Miller (Juneau, Alaska )
Last report date	12/15/2001