French Gulch Prospect, Bonnifield District, Denali Borough, Alaska, USA
Location: The French Gulch placer gold prospect is along French Gulch about 0.5 mile from its junction with Healy Creek. The map site is in sec. 17, T. 12 S., R. 6 W., of the Fairbanks Meridian. This is location 64 of Clark and Cobb (1972).
Geology: French Gulch drains the Tertiary Nenana Gravel, which locally contains gold paleoplacers. The source of the placer gold in French Gulch probably results from reworking the Nenana Gravel.
Workings: Surface only.
Production: One of the limiting factors for mining here was the lack of water.
Commodities (Major) - Au
Development Status: Undetermined.
Deposit Model: Placer Au (Cox and Singer, 1986; model 39a)
ReferencesBrooks, A.H., 1915, Mineral resources of Alaska; report on progress of investigations in 1914: U.S. Geological Survey Bulletin 622, 380 p. Clark, A.L., and Cobb, E.H., 1972, Metallic mineral resources map of the Healy quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-394, 1 sheet, scale 1:250,000. Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Healy quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-1062, 113 p. Maddren, A.G., 1918, Gold placers near the Nenana coal field: U.S. Geological Survey Bulletin 662-G, p. 363-402. Wahrhaftig, Clyde, 1970, Geologic map of the Healy D-4 quadrangle: U.S. Geological Survey Geologic Quadrangle Map GQ-806, scale 1:63,360.
1 entry listed. 1 valid mineral.
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Locality Updated: Pommerit-Jaudy quarry, Côtes-d'Armor, Brittany, FranceFrom Jean-Marc Johannet, 28th Aug 2014 09:07:04