Lafayette Glacier

Occurrence site, 15 of 807 in Valdez-Cordova Census area (in Alaska)

Commodities and mineralogy

Geographic location

Quadrangle map, 1:250,000-scaleAN
Quadrangle map, 1:63,360-scaleA-3
Latitude61.05
Longitude-147.85
Nearby scientific dataFind additional scientific data near this location
Location and accuracyOccurrence in a glacial stream that flows westward from the terminus of Lafeyette Glacier. Accurate within 1 mile. Locality A-17 and P-37 of Jansons and others (1984) and locality P-34 of Hoekzema and Fechner (1986).

Geologic setting

Geologic descriptionJansons and others (1984) reported disseminated, very fine-grained gold in poorly washed fluvial glacial gravels. A large volume of gravel occurs in the stream flowing from Lafayette Glacier and large boulders are present. The bedrock in the area is metasedimentary rocks of the Late Cretaceous Valdez Group. Quartz vein material and metasedimentary float rock contain pyrite, a trace of gold, and up to 0.12 oz/ton Ag (Jansons and others, 1984).
Geologic map unit(-147.852045424253, 61.0494486412502)
Mineral deposit modelPlacer Au (Cox and Singer, 1986; model 39a)
Mineral deposit model number39a
Age of mineralizationQuaternary.

Production and reserves

Workings or explorationThere have been no placer workings or production to date and potential for mineral development is low (Jansons and others, 1984). An alluvium sample contained 0.001 oz/cubic yard Au. Two float samples contained a trace of gold and 0.03 and 0.12 oz/ton Ag.
Indication of productionNone

References

MRDS NumberA106190
References
Hoekzema, R.B., and Fechner, S.A., 1986, Placer Gold sampling in and near the Chugach National Forest, Alaska: U.S. Bureau of Mines Information Circular 9091, 42 p.
ReportersD.P. Bickerstaff (USGS contractor); S.W. Huss (USGS)
Last report date7/30/1998

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