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  3. Alaska Resource Data File (ARDF)

O.K.

Prospect, Undetermined

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Commodities and mineralogy

Main commodities Au; Cu; Pb; Zn
Ore minerals chalcopyrite; galena; gold; pyrite; sphalerite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale CR
Quadrangle map, 1:63,360-scale A-1
Latitude 55.1975
Longitude -132.03038
Nearby scientific data Find additional scientific data near this location
Location and accuracy The location of the O.K. prospect is based solely on small-scale map in Wright and Wright (1908). It probably is within 0.5 mile of the center of the NE1/4 section 17, T. 77 S., R. 89 E.

Geologic setting

Geologic description

As described by Wright and Wright (1908), the O.K. prospect is a quartz vein 3 to 4 feet thick that strikes N75W; it contains chalcopyrite, pyrite, sphalerite, galena, and gold. Little work had been done on it then and apparently it has not been described since. The vein is at the contact between schist and limestone of the Wales Group of Late Proterozoic and Cambrian age (Eberlein and others, 1983; Brew 1996). Hedderly-Smith (1999 [Inventory]) suggests that the deposit may be similar to the quartz-breccia mineralization along the Kael-7 Mile Trend (CR188), as the prospect is well within that mineralized belt.
Geologic map unit (-132.03205354804, 55.1971451473005)
Mineral deposit model Quartz vein with sulfides and gold.

Production and reserves

Workings or exploration Little work had been done on this prospect in 1908 and apparently there has been none since.
Indication of production None

References

MRDS Number A010099

References

Brew, D.A., 1996, Geologic map of the Craig, Dixon Entrance, and parts of the Ketchikan and Prince Rupert quadrangles, southeastern Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-2319, 53 p., 1 sheet, scale 1:250,000.
Cobb, E. H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Craig quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-869, 262 p.
Eberlein, G.D., Churkin, Michael, Jr., Carter, Claire, Berg, H.C., and Ovenshine, A. T., 1983, Geology of the Craig quadrangle, Alaska: U.S. Geological Survey Open-File Report 83-91, 52 p.
Hedderly-Smith, D.A., 1999, Inventory of metallic mineral prospects, showings and anomalies on Sealaska lands, 1988 through 1998: Sealaska Corporation, Juneau, Alaska, 217 p. (internal report held by Sealaska Corporation, Juneau, Alaska).
Wright, F.E., and Wright, C.W., 1908, The Ketchikan and Wrangell mining districts, Alaska: U.S. Geological Survey Bulletin 347, 210 p.
Reporters D.J. Grybeck (Applied Geology)
Last report date 5/1/2004