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Cook

Prospect, Inactive

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Alternative names

Coronado

Commodities and mineralogy

Main commodities Au; Cu

Geographic location

Quadrangle map, 1:250,000-scale SI
Quadrangle map, 1:63,360-scale C-1
Latitude 57.5204
Longitude -134.0733
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Coronado (U.S. Bureau of Land Management, 2002) or Cook (Cobb, 1972, 1978) prospect is at an elevation of about 1,100 feet, 0.5 mile northeast of the north head of Gambier Bay. The prospect is 0.4 mile southeast of the center of sec. 19, T. 50 S., R. 71 E. It is location 70 of Cobb (1972, 1978) and MAS no. 0021140175 (U.S. Bureau of Land Management, 2002). The location is accurate within 0.2 mile.

Geologic setting

Geologic description

This prospect is in marble of the Gambier Bay Formation (Lathram and others, 1965). There are several references to this prospect but all refer back to Wright (1906) as the source of their information. Wright had little information on the Cook prospect other than that a claim was located on a gold- and silver-bearing 'ledge' (vein?) and that no work had been done on it as of 1904.
Geologic map unit (-134.075035080845, 57.5200605878528)
Age of mineralization Devonian or younger based on the age of the host rock.

Production and reserves

Workings or exploration A claim was staked before 1904.
Indication of production None

Additional comments

The prospect is now within the Wilderness of the Admiralty Island National Monument and is closed to mineral exploration and development.

References

MRDS Number A013316

References

Berg, H.C., and Cobb, E.H., 1967, Metalliferous lode deposits of Alaska: U.S. Geological Survey Bulletin 1246, 254 p.
Cobb, E.H., 1972, Metallic mineral resources map of the Sitka quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-467, scale 1:250,000.
Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Sitka quadrangle: U.S. Geological Survey Open-File Report 78-450, 124 p.
Herbert, C.F., and Race, W.H., 1964, Geochemical investigations of selected areas in southeastern Alaska, 1964: Alaska Division of Mines and Minerals Geochemical Report 1, 75 p.
Herbert, C.F., and Race, W.H., 1965, Geochemical investigations of selected areas in southeastern Alaska, 1964 and 1965: Alaska Division of Mines and Minerals Geochemical Report 6, 67 p., 4 sheets, scale 1:63,360.
Lathram, E.H., Loney, R.A., Berg, H.C., and Pomeroy, J.S., 1960, Progress map of the geology of Admiralty Island, Alaska: U.S. Geological Survey Miscellaneous Investigations Map I-323, 1 sheet, scale 1:250,000.
Lathram, E.H., Pomeroy, J.S., Berg, H.C., and Loney, R.A., 1965, Reconnaissance geology of Admiralty Island, Alaska: U.S. Geological Survey Bulletin 1181-R, p. R1-R48.
Race, W.H., and Rose, A.W., 1967, Geochemical and geological investigations of Admiralty Island, southeastern Alaska: Alaska Division of Geological and Geophysical Surveys, Geochemical Report 8, 45 p.
U.S. Bureau of Land Management, 2002, Alaska mineral locations database report (Sitka quadrangle), July 2, 2002, 205 p. [http://imcg.wr.usgs.gov/dem.html]
Wright, C.W., 1906, A reconnaissance of Admiralty Island, in Spencer, A.C. and Wright, C.W., The Juneau Gold Belt, Alaska; and A Reconnaissance of Admiralty Island, Alaska: U. S. Geological Survey Bulletin 287, p. 138-161.
Wright, F.E., and Wright, C.W., 1905, Economic developments in southeastern Alaska, in Brooks, A.H., Report on Progress of Investigations of Mineral Resources of Alaska in 1904: U.S. Geological Survey Bulletin 259, p. 47-68.
Reporters Donald Grybeck (U.S. Geological Survey)
Last report date 5/5/2005