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Frodenburg and Bloom

Prospect, Inactive

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Commodities and mineralogy

Main commodities Au
Ore minerals gold
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale SR
Quadrangle map, 1:63,360-scale D-3
Latitude 60.9812
Longitude -147.9715
Nearby scientific data Find additional scientific data near this location
Location and accuracy This prospect is about one mile northeast of Golden at an elevation of 1,150 feet. It is within the SE1/4 section 2, T. 10 N., R. 8 E., of the Seward Meridian. This is location 98 of Condon and Cass (1958), location 80 of Cobb and Richter (1972), location 96 of MacKevett and Holloway (1977), location 153 of Cobb and Tysdal (1980), and location S-134 of Jansons and others (1984). This location is accurate to within a quarter of a mile.

Geologic setting

Geologic description

The prospect is hosted in sheared graywacke and slate of the Valdez Group of Late Cretaceous age (Cobb and Tysdal, 1980). The shear strikes N80E and dips 60N. At one place a quartz lens, 10 to 18 inches wide and traceable for 45 feet, fills the entire shear. About 50 feet farther uphill, a 25-foot open cut exposes a 10-inch shear containing 8 inches of quartz. Johnson (1914 [B 592-G, p. 221-222]) reported a few fine colors were obtainable from this quartz by panning, but no assay results are reported. The workings on the prospect consist of minor surface stripping.
Geologic map unit (-147.97355011052, 60.98063058426)
Mineral deposit model Low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a)
Mineral deposit model number 36a
Age of mineralization Cretaceous or younger; the deposit is in a shear zone that cuts rocks of the Valdez Group of Late Cretaceous age.

Production and reserves

Workings or exploration Johnson (1914 [B 592-G, p. 221-222]) reported minor surface stripping and that a few fine colors were obtainable from panning the veins. No assay values were reported. The U.S. Bureau of Mines searched for the prospect in 1979 but did not find it (Hoekzema and Sherman, 1983).
Indication of production None

References

MRDS Number A010388

References

Cobb, E.H., and Richter, D.H., 1972, Metallic mineral resources map of the Seward quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-466, 2 sheets, scale 1:250,000.
Cobb, E.H., and Tysdal, R.G., 1980, Summaries of data on and list of references to metallic and selected nonmetallic mineral deposits in the Blying Sound and Seward quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-621, 276 p.
Condon, W.H., and Cass, J.T., 1958, Map of a part of the Prince William Sound area, Alaska, showing linear geologic features as shown on aerial photographs: U.S. Geological Survey Miscellaneous Investigations Series Map I-273, 1 sheet, scale 1:125,000.
Hoekzema, R.P., and Sherman, G.E., 1983, Mineral investigations in the Chugach National Forest, Alaska (Peninsula study area): U.S. Bureau of Mines in-house report; held at U.S. Bureau of Land Management Alaska State Office, Anchorage, 524 p.
Jansons, Uldis, Hoekzema, R.B., Kurtak, J.M., and Fechner, S.A., 1984, Mineral occurrences in the Chugach National Forest, southcentral Alaska: U.S. Bureau of Mines Mineral Land Assessment 5-84, 218 p., 2 sheets, scale 1:250,000.
Johnson, B.L., 1914, The Port Wells gold-lode district, Alaska: U.S. Geological Survey Bulletin 592-G, p. 195-236.
MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous and selected non-metalliferous mineral deposits in the eastern part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-A, 99 p., 1 sheet, scale 1:1,000,000.
Tysdal, R.G., 1978, Mines, prospects, and occurrences map of the Seward and Blying Sound quadrangles, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-880-A, 2 sheets, scale 1:250,000.
Reporters Jeff A. Huber (Anchorage)
Last report date 5/9/2000