|Quadrangle map, 1:250,000-scale||BN|
|Quadrangle map, 1:63,360-scale||D-3|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is on both sides of Old Glory Creek at the mouth of Nelson Creek. It is about 0.4 mile west of the center of section 7, T. 5 N., R. 22 W. The location is accurate.|
Herreid (1966) described mineralized, quartz segregations and boudins in schist and marble in an old placer cut just above the mouth of Nelson Creek. A sample contains 0.02 ounce of gold per ton, 0.10 ounce of silver per ton, 0.05 percent copper, 0.05 percent lead, and 0.05 percent zinc (Herreid, 1966). The rocks in the area are Paleozoic schist and marble (Till and others, 1986); they are locally bleached and altered to clay at the occurrence.In 2006, Royal Pretoria Mines working for Millrock Resources Inc. carried out geochemical surveys in the area; they defined a geochemical anomaly in gold, arsenic, and antimony over this occurrence (Hawley, 2007). Subsequently, they discovered mineralized float on both sides of Old Glory Creek. The float consisted of silicified carbonate rocks with quartz veinlets and a iron-stained quartz boulder with various combinations of stibnite, arsenopyrite, and pyrite. Five samples contained up to 0.92 parts per million (ppm) gold, more than 10,000 ppm antimony, 4,750 ppm zinc, and 3,130 ppm arsenic.
|Geologic map unit||(-163.189694594735, 65.8461029167024)|
|Mineral deposit model||Gold-stibnite-arsenopyrite-quartz veins in marble.|
|Age of mineralization||Unclear, other than the mineralization is younger than the Paleozoic host rocks. Epigenetic mineralization in metamorphic rocks of Seward Peninsula is primarily of Cretaceous age.|
|Alteration of deposit||Schist is bleached locally and crosscut by a zone of clay alteration.|
|Workings or exploration||Mineralized float occurs on both sides of Old Glory Creek; sampled by government and industry geologists.|
|Indication of production||None|
Cobb, E.H., 1975, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Bendeleben quadrangle, Alaska: U.S. Geological Survey Open-File Report 75-429, 123 p.
Hawley, C.C., 2007, Inmachuk exploration project, Seward Peninsula, northwestern, Alaska: NI 43-101 Technical Report for First Factor Developments, Inc., 57 p. (Posted on www.sedar.com, June 25, 2007, under Millrock Resources, Inc.)
Herreid, G.H., 1966, The geology and geochemistry of the Inmachuk River map area, Seward Peninsula, Alaska: Alaska Division of Mines and Minerals Geological Report 23, 25 p., 1 sheet, scale 1:63,360.
Hudson, T.L., Miller, M. L., and Pickthorn, W. J., 1977, Map showing metalliferous and selected nonmetalliferous mineral deposits, Seward Peninsula, Alaska: U.S. Geological Survey Open-File Report 77-796-B, 46 p., 1 sheet, scale 1:1,000,000.
|Reporters||Travis L. Hudson (Applied Geology); D.J. Grybeck (Contractor, U.S. Geological Survey)|
|Last report date||4/2/2010|