|Quadrangle map, 1:250,000-scale||MH|
|Quadrangle map, 1:63,360-scale||B-3|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is at an elevation of about 6,200 feet on the Johnson Glacier 2 miles east-northeast of Snow White Peak. It is in the SW1/4 section 8, T. 18 S., R. 13 E., Fairbanks Meridian. The location is accurate.|
This occurrence is generally described as lead-zinc-antimony veins in quartz sericite schist occurring along a 1,500-foot-long, northwest-trending, rubble train. Samples show erratic values: as much as 9.4 percent antimony, 1.25 percent arsenic, 0.3 percent zinc, 0.06 percent lead, and 0.035 ounce of gold per ton (R.A. Blakestad and others, unpublished Resource Associates of Alaska, Inc. report, 1976).This unnamed occurrence is within the Jarvis Creek subterrane, which is Devonian and older. This terrane is chiefly composed of fine-grained, mylonitic metasedimentary rocks. The unit is about 65 percent quartz-mica schist, 15 percent quartzite, and 5 percent each of chlorite-white-mica schist, quartz-biotite schist, calcareous schist, and marble. Protoliths are mainly pelite, quartz sandstone, graywacke, marl, and limestone. Intense deformation and recrystallization have obliterated most relict minerals and textures. The unit is probably is a few thousand meters thick (Nokleberg and others, 1992).
|Geologic map unit||(-145.312442393672, 63.3647975646019)|
|Mineral deposit model||Polymetallic veins (Cox and Singer, 1986; model 22c).|
|Mineral deposit model number||22c|
|Age of mineralization||Devonian or younger, on the basis of the age of the host rock, which is in the Jarvis Creek Glacier subterrane (Nokleberg and others, 1992).|
|Workings or exploration||This occurrence was visited in 1976 by Resource Associates of Alaska, Inc. but there is no more recent report of work (Rodney A. Blakestad and others, unpublished Resource Associates of Alaska, Inc. report, 1976).|
|Indication of production||None|
Additional commentsUnpublished data cited is available for viewing by contacting Grayd Resources Inc. in Vancouver, B. C., Canada (www.grayd.com), or Northern Associates Inc. in Fairbanks, Alaska.
Nokleberg, W.J., Aleinikoff, J.N., Lange, I.M., Silva, S.R., Miyaoka, R.T., Schwab, C.E., Zehner, R.E., Bond, G.C., Richter, D.H., Smith, T.E., and Stout, J.H., 1992, Preliminary geologic map of the Mount Hayes quadrangle, eastern Alaska Range, Alaska: U.S. Geological Survey Open-File Report 92-594, 39 p., 1 sheet, scale 1:250,000.
|Reporters||W.T. Ellis (Alaska Earth Sciences) and A.W. Wyatt and S.S. Dashevsky (Northern Associates Inc.)|
|Last report date||3/20/2003|