Unnamed (head of Yankee Creek) (ARDF #ID033) Ag, Au

Unnamed (head of Yankee Creek)

Prospect, Active

Commodities and mineralogy

Main commodities	Ag; Au
Other commodities	As; Pb; Sb
Ore minerals	arsenopyrite; gold; iron oxide; jamesonite
Gangue minerals	carbonate minerals; dickite; quartz

Geographic location

Quadrangle map, 1:250,000-scale	ID
Quadrangle map, 1:63,360-scale	D-1
Latitude	62.9591
Longitude	-156.44737
Nearby scientific data	Find additional scientific data near this location
Location and accuracy	This prospect is at an elevation of about 2,000 feet on the south flank of feature locally called Telephone Hill. It is about 2.3 miles east-southeast of the mouth of Six Gulch and about 0.6 mile southeast of the center of section 11, T. 33 N., R. 38 W., of the Seward Meridian. The location is accurate.

Geologic setting

Geologic description This prospect consists of: 1) quartz breccia and vuggy veins on the hanging wall of an altered, N30E-trending, granite-porphyry dike, and 2) sheeted quartz-sulfide veins in sandstone of the Upper Cretaceous, Kuskokwim Group. The deposit is exposed in several pits, and locally is oxidized to iron-oxide-rich gossan (Miller and Bundtzen, 1994; Bundtzen and Miller, 1997; Miller, Bundtzen, and Gray, 2005). Arsenopyrite, jamesonite, and visible free gold are reported from quartz-sulfide veins in the old prospect pits. Bundtzen and Laird (1983) collected samples that contained 730 parts per billion gold and 5.0 parts per million. The geology and mineralization at this prospect is similar to that at the Independence Mine (ID031) about 2 miles to the southwest.
Geologic map unit	(-156.449733479913, 62.9584671973044)
Mineral deposit model	Polymetallic vein or Porphyry Au-Cu (Cox and Singer, 1986; models 22c, 20c).
Mineral deposit model number	22c or 20c
Age of mineralization	Probably Late Cretaceous, based on the age of nearby, dated intrusives at the Telephone Hill prospect (ID035).
Alteration of deposit	Dike has undergone carbonatization and is silicified and argillized.

Production and reserves

Workings or exploration	Prospect pits were dug prior to World War II. The Telephone Hill area was prospected by Westgold Inc., in 1989 and by Placer Dome Exploration in 1997. From 1997 to 2002, the prospect was included in the area of a an option agreement between Doyon Limited (the land owner) and North Star Exploration, Inc., a Colorado-based exploration firm.
Indication of production	None

References

References Bundtzen, T.K., and Laird, G.M., 1983, Geologic map of the Iditarod D-1 quadrangle, Alaska: Alaska Division of Geological and Geophysical Surveys Professional Report 78, scale 1:63,360. Bundtzen, T.K., and Miller, M.L., 1997, Precious metals associated with Late Cretaceous-early Tertiary igneous rocks of southwestern Alaska, in Goldfarb, R.J., and Miller, L.D., eds., Mineral Deposits of Alaska: Economic Geology Monograph 9, p. 242-286. Miller, M.L., and Bundtzen, T.K., 1994, Generalized geologic map of the Iditarod quadrangle, Alaska showing potassium-argon, major oxide, trace element, fossil, paleocurrent, and archeological sample localities: U.S. Geological Survey Miscellaneous Field Studies Map MF-2219-A, 48 pages; 1 sheet, scale 1:250,000. Miller, M.L., Bundtzen, T.K., and Gray, J.E., 2005, Mineral resource assessment of the Iditarod quadrangle, west-central Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-2219-B, scale 1:250,000, pamphlet.
Reporters	T.K. Bundtzen (Pacific Rim Geological Consulting, Inc.), M.L. Miller (U.S. Geological Survey); and C.C. Hawley (Hawley Resource Group)
Last report date	5/16/2003