Champion I

Prospect, Active?

Commodities and mineralogy

Main commodities Au; Cu
Other commodities Ag; Zn
Ore minerals chalcopyrite; magnetite; pyrrhotite
Gangue minerals calc-silicates; pyroxene

Geographic location

Quadrangle map, 1:250,000-scale EA
Quadrangle map, 1:63,360-scale C-2
Latitude 64.5555
Longitude -141.6806
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Champion I lode prospect is located on a ridge northwest of a large bend in Champion Creek in the southeast part of the Eagle C-2 quadrangle. The coordinates are the approximate center of the prospect, near the eastern boundary of section 22, T. 4 S., R. 30 E., of the Fairbanks Meridian. The location is accurate. The Champion I prospect is located within Doyon, Ltd. selected or conveyed land.

Geologic setting

Geologic description

The rocks in the vicinity of the Champion I prospect consist of a wide variety of undifferentiated, greenschist- to amphibolite-facies, Paleozoic schist, quartzite, marble, and lesser greenstone (Foster, 1976). The Champion I prospect contains gold and base-metal sulfides in hornfelsed roof pendants on the margin of a large granitic pluton of Tertiary or Mesozoic age (Foster, 1976; U.S. Bureau of Mines, 1995). Chalcopyrite, pyrrhotite, and magnetite occur within a 4.5- by 7.5-meter area of pyroxene skarn within biotite schist; samples contain as much as 0.41 percent copper and 11 to 490 ppb gold (WGM Inc., 1998 [DLR 98-12]). An adjacent light-green endoskarn contains as much as 78 ppm silver and 3.0 percent zinc. Fractured hornfels with gossan in the roof pendant contains as much as 872 ppb gold. Lead isotope analysis of a sample from the nearby Champion II skarn (EA049) indicates a Late Cretaceous to early Tertiary age for the skarn and its associated intrusion (U.S. Bureau of Mines, 1995); it is likely that the Champion I skarn is of the same age. Champion II (EA049), East Champion (EA047), North Champion (EA046), and Oregon Creek (EA045) are other base-metal lode prospects within 5 miles of the Champion I prospect.
The discovery of gold and base-metal sulfides at the Champion I prospect was made in the 1930s by prospectors, who hand excavated trenches (WGM Inc., 1998 [DLR 98-12]). From 1975 to 1977, WGM Inc. conducted regional geochemical surveys, mapped, and sampled in the area. A large copper-lead-zinc-silver soil anomaly was defined, but there was no indication of the prospect in VLF, EM, and magnetic surveys. The Champion I prospect was abandoned as a viable target due to the small tonnage and grade inherent in these small roof-pendant-hosted deposits (Dashevsky and others, 1986).
Geologic map unit (-141.682922650711, 64.5551717234867)
Mineral deposit model Cu skarn or Zn-Pb skarn (Cox and Singer, 1986; models 18b and 18c).
Mineral deposit model number 18b or 18c
Age of mineralization Lead isotopic ratios indicate a Late Cretaceous or early Tertiary age for the nearby Champion II skarn deposit (U.S. Bureau of Mines, 1995); it is likely that the Champion I prospect is the same age.

Production and reserves

Workings or exploration The discovery of gold and base-metal sulfides at the Champion I prospect was made in the 1930s by prospectors, who hand excavated trenches (WGM Inc., 1998 [DLR 98-12]). From 1975 to 1977, WGM Inc. conducted regional geochemical surveys, mapped, and sampled in the area. A large copper-lead-zinc-silver soil anomaly was defined, but there was no indication of the prospect in VLF, EM, and magnetic surveys. The Champion I prospect was abandoned as a viable target due to the small tonnage and grade inherent in these small roof-pendant-hosted deposits (Dashevsky and others, 1986). In 1996 and 1997, sampling of soil on a grid extended the area of defined soil anomalies.
Indication of production None
Reserve estimates The Champion I prospect was abandoned as a viable target due to the small tonnage and grade inherent in these small roof-pendant-hosted deposits (Dashevsky and others, 1986).

Additional comments

The Champion I prospect is located within Doyon, Ltd. selected or conveyed land. For more information contact Doyon, Ltd., Fairbanks, Alaska.

References

References

Dashevsky, S.S., Nicol, D.L., and Bond, J., 1986, Mines, prospects, and geochemical anomalies on Doyon Limited regional overselection lands, Alaska, Blocks 1-8: Doyon, Ltd. Report 86-01a, 300 p. (Report held by Doyon, Ltd., Fairbanks, Alaska).
Lessman, J., and Holm, B., 1978, 1977 annual progress report, Doyon Project, Champion-Lead Creek area: Doyon, Ltd. Report 78-02. (Report held by Doyon, Ltd., Fairbanks, Alaska).
WGM Inc., 1977, Doyon Project, 1976 annual progress report, volume 1a, Blocks 1, 4, 5, 7, 8: Doyon, Ltd. Report 77-02a. (Report held by Doyon, Ltd., Fairbanks, Alaska).
WGM Inc., 1998, Ventures Resource Alaska projects, 1997 progress report, Champion property exploration: Doyon, Ltd. Report 98-12, 64 p. (Report held by Doyon, Ltd., Fairbanks, Alaska).
Reporters M.B. Werdon; R.L. Flynn
Last report date 5/1/2002