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Lenard Harbor

Occurrence, Inactive

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Commodities and mineralogy

Main commodities Ag; Au
Other commodities Hg

Geographic location

Quadrangle map, 1:250,000-scale CB
Quadrangle map, 1:63,360-scale A-2
Latitude 55.1083
Longitude -162.3417
Nearby scientific data Find additional scientific data near this location
Location and accuracy Approximate location is near head of Lenard Harbor. May correspond in part to anomaly no. 58 of Christie (1974), described as northeast of Lenard Harbor in first north-south valley. See also CB006, Unnamed. Occurrence no. 6 of MacKevett and Holloway (1977, p. 9).

Geologic setting

Geologic description

Christie (1974) reported two 3,000 ft (900 m) in diameter color anomalies resulting from irregularly distributed disseminated pyrite, and apparently not related to any intrusive bodies. Country rocks are pyroclastic volcanic rocks and minor andesite flows and diorite dikes. Pyroclastic rocks having high initial porosity are best pyritized. A few weakly altered diorite dikes having trace disseminated pyrite cut the lower elevation(?) anomaly.
Geologic map unit (-162.343711585543, 55.1074296749059)
Mineral deposit model Hot-springs gold-silver, epithermal gold vein, polymetallic vein
Mineral deposit model number 25a, 25d, 22
Age of mineralization Pliocene or younger
Alteration of deposit Country rocks show weak propylitic alteration.

Production and reserves

Workings or exploration Brief reconnaissance geologic mapping reported by Christie (1974, source of geologic description) who also collected a few silt samples. Only anomaly was silver at up to 1.6 ppm. Butherus and others (1979) did brief reconnaissance of area for gold around Lenard Harbor and found elevated mercury over a broad area.
Indication of production None

References

MRDS Number A106055

References

Butherus, D.L, Gressitt, E.E., Pray, J., Corner, N.G., Lindberg, P.H., and Fankhauser, R.E., 1979, Exploration and evaluation of the Aleut Native Corporation lands; Volume III: Resource Associates of Alaska, 69 p. 90 sheets, various sacales. (Report held by the Aleut Native Corporation, Anchorage, Alaska.)
Christie, J.S., 1974, Aleut-Quintana-Duval 1974 joint venture, final report: Unpublished Quintana Minerals Corporation report, 24 p., 3 appendices, 2 maps. (Report held by the Aleut Corporation, Anchorage, Alaska.)
MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous mineral deposits in the western part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-F, 38 p., 1 sheet, scale 1:1,000,000.
Reporters G.D. DuBois, F.H. Wilson
Last report date 5/9/1994