Unnamed (west of Snowy Mountain)

Occurrence, Active

Commodities and mineralogy

Main commodities Cu; Pb
Ore minerals chalcopyrite; galena; pyrite
Gangue minerals quartz; siderite

Geographic location

Quadrangle map, 1:250,000-scale JU
Quadrangle map, 1:63,360-scale A-3
Latitude 58.2012
Longitude -134.8324
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of approximately 3,000 feet on the Mansfield Peninsula, 1/2 mile northwest of Snowy Mountain. It is just above the center of the boundary between section 29 and 30, T. 42 S., R. 65 E. of the Copper River Meridian. The location is accurate.

Geologic setting

Geologic description

Wells and others (1986) describe this occurrence as disseminated pyrite, chalcopyrite, and galena in siderite-cemented quartz breccia. The rocks in the general area are mainly Ordovician and Devonian to Triassic, clastic units, mafic-intermediate volcanic rocks, and subordinate limestone. The bedded rocks are intruded and locally metamorphosed by Cretaceous granodiorite (Gehrels and Berg, 1994).
Geologic map unit (-134.834190932467, 58.2008638227432)

Production and reserves

Workings or exploration Probably explored in conjunction with exploration of the Alaska Dano mine (JU235).
Indication of production None

Additional comments

The occurrence is on the southern portion of a large block of patented mining claims that cover the Alaska Dano and Nowell-Otterson properties (JU235, JU236).

References

MRDS Number A012093

References

Gehrels, G.E., and Berg, H.C., 1994, Geology of southeastern Alaska, in Plafker, George, and Berg, H. C., eds., The geology of Alaska: Geological Society of America, DNAG, The geology of North America, Vol. G-1, p. 451-467.
Reporters J.C. Barnett and L.D. Miller (Juneau, Alaska )
Last report date 12/15/2001