|Quadrangle map, 1:250,000-scale||JU|
|Quadrangle map, 1:63,360-scale||C-3|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This placer prospect is at an elevation of approximately 100 feet on Herbert River near the terminus of the Herbert Glacier. It is in the SE1/4SE1/4 section 32, T. 38 S., R. 65 E. of the Copper River Meridian. The location is accurate.|
Geologic descriptionThe Herbert Glacier gold placer prospect consists of glacial sand deposited near the terminus of the glacier. The sand was mined in 1932 and 1933 and processed with a centrifugal concentrator, but recovery was poor and the operation failed. Native gold-bearing quartz veins outcrop upstream from this prospect along the southern margin of Herbert Glacier (JU097) (Redman and others, 1989).
|Geologic map unit||(-134.704788965999, 58.530774349999)|
|Mineral deposit model||Placer Au (Cox and Singer, 1986; model 39a)|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary.|
|Workings or exploration||Glacial sand from the Herbert River was mined in 1932 and 1933 and processed with a centrifugal concentrator, but recovery was poor and the operation failed.|
|Indication of production||Undetermined|
Gehrels, G.E., McClelland, W.C., Samson, S.D., and Patchett, P.J., 1991, U-Pb geochronology of detrital zircons from a continental margin assemblage in the northern Coast Mountains, southeastern Alaska: Canadian Journal of Earth Sciences, v. 28, no. 8, p.1285-1300.
Goldfarb, R.J., Miller, L.D., Leach, D.L., and Snee, L.W, 1997, Gold deposits in metamorphic rocks in Alaska, in Goldfarb, R.J., and Miller, L.D., eds., Mineral Deposits of Alaska: Economic Geology Monograph 9, p. 151-190.
Miller, L.D., Goldfarb, R.J., Gehrels, G,E., and Snee, L.W., 1994, Genetic links among fluid cycling, vein formation, regional deformation, and plutonism in the Juneau gold belt, southeastern Alaska: Geology, v. 22, p. 203-206.
Redman, E.C., Maas, K.M., Kurtak, J.M., and Miller, L.D., 1991, Section D: Juneau Gold Belt subarea, in U.S. Bureau of Mines, Mineral investigations in the Juneau Mining District, Alaska, 1984-1988: Volume 2 - Detailed mine, prospect, and mineral occurrence descriptions: U.S. Bureau of Mines Special Publication VOL. 2D, 424 p., 19 sheets.
|Reporters||J.C. Barnett and L.D. Miller (Juneau, Alaska )|
|Last report date||12/15/2001|