Unnamed Occurrence (ARDF - JU059; on William Henry Mountain), Skagway District, Juneau District, Haines Borough, Alaska, USA
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Location: This occurrence is at an elevation of about 2,800 feet, approximately 1/2 mile north-northeast of William Henry Mountain and 1.5 mile west of Lynn Canal. It is just northwest of the center of section 17, T. 36 S., R. 61 E. of the Copper River Meridian. The location is accurate within 1/4 mile.
Geology: The general area is underlain mainly by Silurian and Devonian graywacke and argillite and Middle Devonian carbonate, clastic and volcanic rocks (MacKevett and others, 1971; Brew and others,1978). The country rocks at this prospect are Silurian graywacke and Devonian and Silurian greenstone intruded by small bodies of Cretaceous quartz monzonite and syenite (Clough and Redman, 1989). The U.S. Bureau of Mines sampled a quartz vein at this site that contained 17,000 ppm zinc and 1,400 ppm lead (Clough and Redman, 1989).
Workings: Surface sampling only.
Commodities (Major) - Pb, Zn
Development Status: None
Mineral List
1 entry listed. 1 valid mineral.
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References
Brew, D.A., Johnson, B.R., Grybeck, D., Griscom, A., Barnes, D.F., Kimball, A.L., Still, J.C., and Rataj, J.L., 1978, Mineral resources of the Glacier Bay National Monument Wilderness Study Area, Alaska: U.S. Geological Survey Open-File Report 78-494, 670 p., 7 sheets. Clough, A.H., and Redman, E.C., 1989, Bureau of Mines mineral investigations in the Juneau mining district, Alaska, 1984-1988, Volume 2, Detailed mine, prospect, and mineral occurrence descriptions, Section C, West Lynn Canal subarea: U.S. Bureau of Mines of Mines Special Publication, 44 p. MacKevett, E.M., Jr., Brew, D.A., Hawley, C.C., Huff, L.C., and Smith, J.G., 1971, Mineral resources of Glacier Bay National Monument, Alaska: U.S. Geological Survey Professional Paper 632, 90 p., 12 plates, scale 1:250,000.
