Moosehead Rack Prospect, Hot Springs Mining District, Yukon-Koyukuk Census Area, Alaska, USAi

Regional Level Types
Moosehead Rack Prospect	Prospect
Hot Springs Mining District	Mining District
Yukon-Koyukuk Census Area	Census Area
Alaska	State
USA	Country

Although this prospect is not on Doyon, Ltd., lands, mineral exploration of the ground is reported in documents held by Doyon, Ltd., Native Corporation. For more information, contact Doyon, Ltd., at 1 Doyon Place, Suite 300, Fairbanks, Alaska, 99701-2941.
Location: Moosehead Rack, on the south bank of the Yukon River opposite the mouth of Morelock Creek, consists of a four-square-mile terrace rising abruptly more than 200 feet above the river to an elevation of about 900 feet. The site of this approximately located prospect is at an elevation of 600 feet at the west end of Moosehead Rack, in the northwest quarter of section 21, T. 5 N., R. 18 W., of the Fairbanks Meridian. The location is accurate to within a half-mile.
Geology: The country rocks in the area of this prospect include a Cretaceous or Tertiary quartz monzonite stock, Paleozoic limestone, greenstone, and chert, and undated conglomerate, sandstone, shale, and lignite (Chapman and others, 1982). Moosehead Rack is a bedrock terrace cut by the Kaltag fault, a regional east-northeast-trending, right-lateral structure. Bedrock in the area is partly covered by Quaternary loess. The prospect consists of pyritized hornfelsed slate and highly siliceous zones of breccia adjacent to megacrystic granite porphyry (WGM, Inc., 1998). Pyrite, pyrrhotite, and chalcopyrite locally constitute up to 6 percent of the host rock(s). Panning of some of the material yielded colors of gold. The prospect is marked by a red and yellow-white color anomaly, visible from the Yukon River.
Workings: The area has been explored by WGM, Inc. (1998). Details of their work have not been made public.
Age: Cretaceous or younger, inferred from age of granitic pluton.
Alteration: Oxidation of sulfide minerals.

Commodities (Major) - Au
Development Status: None
Deposit Model: Porphyry Cu-Au(?) (Cox and Singer, 1986; model 20c).

Other Databases

Link to USGS - Alaska:	TN039

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References