Rhodo

Prospect, Inactive

Commodities and mineralogy

Main commodities Ag; Au
Other commodities As; Cu; Hg; Pb; Zn
Ore minerals chalcopyrite; galena; gold; pyrite; sphalerite
Gangue minerals calcite; quartz; rhodonite; siderite

Geographic location

Quadrangle map, 1:250,000-scale PM
Quadrangle map, 1:63,360-scale B-2
Latitude 55.2903
Longitude -160.4693
Nearby scientific data Find additional scientific data near this location
Location and accuracy This prospect is at an elevation of about 300 feet, on a bluff overlooking Popov Strait west of Red Cove ( Wilson and others, 1988, locality 45). The map site is about 0.3 mile south of hill 545, in sec. 33, T. 56 S., R. 73 W., of the Seward Meridian. The location is accurate to within 500 feet.

Geologic setting

Geologic description

The Rhodo vein system, exposed over a 400-foot vertical extent, cuts andesite of the late Eocene to early Oligocene Popof volcanic rocks (Wilson and others, 1995). The system is 4 to 5 feet thick, and consists of quartz-carbonate veins containing chalcopyrite, galena, sphalerite, and pyrite. The veins are generally fine grained with very few vugs or open-growth features. The veins are unique for this area in containing the carbonate gangue minerals calcite, rhodonite, and siderite. There may be a vertical zonation marked by increased base metals at lower elevations (Peterson and others, 1982).
Eight channel samples contained as much as 0.13 ppm gold, 1.3 ppm silver, 290 ppm copper, 1,830 ppm lead, 198 ppm zinc, 310 ppm arsenic, and 0.45 ppm mercury. Six grab samples contained as much as 5.46 ppm gold, 108 ppm silver, 2,200 ppm copper, 7.88 percent lead, 8.4 percent zinc, 140 ppm arsenic, and 1.5 ppm mercury (Peterson and others, 1982).
Geologic map unit (-160.471313971162, 55.2894764704577)
Mineral deposit model Epithermal gold vein, Polymetallic veins (Cox and Singer, 1986; model 22c)
Mineral deposit model number 22c
Age of mineralization Eocene or younger.
Alteration of deposit The wall rocks exhibit strong carbonate alteration accompanied by pyrite.

Production and reserves

Workings or exploration UNC Teton Exploration Drilling Company collected 14 samples of this deposit. Their channel samples contained as much as 0.13 ppm gold and 1.3 ppm silver; their grab samples contained as much as 5.46 ppm gold, 108 ppm silver, 2,200 ppm copper, 7.88 percent lead, 8.4 percent zinc, 140 ppm arsenic, and 1.5 ppm mercury. Earlier workers drove a short adit on the prospect (Wilson and others, 1988).
Indication of production None

Additional comments

The site is located on land patented by, or interim-conveyed to, the Aleut Corporation.

References

MRDS Number 10308161

References

Peterson, R.J., Lemmers, J., Handverger, P., Gallagher, J., Pilcher, R., East, J., Macleod, T., Bartels. E., 1982, Geology and precious metals potential Unga, Popof, and Korovin Islands, Shumagin Group, Aleutian Chain, Alaska: UNC Teton Exploration Drilling Company report, 127 p., 5 map sheets, various scales. (Report held by the Aleut Corporation, Anchorage, Alaska.)
Reporters S.H. Pilcher
Last report date 1/16/2001