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Old Glory Occurrence, Fairhaven District, Northwest Arctic Borough, Alaska, USA

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Location: This occurrence is on the east side of Old Glory Creek valley, at an elevation of 400 feet. It is about 4,000 feet upstream of the mouth of Old Glory Creek. Old Glory Creek is a northeast-flowing tributary to Pinnell River. The mouth Old Glory Creek is about 1.5 miles upstream of the confluence of Pinnell and Inmachuk Rivers.
Geology: A ferruginous gossan in dolomitic marble is developed over a 110 by 500 foot area. The gossan is developed along a marble layer that now contains dolomite, quartz, pyrite (?), sericite, chlorite and minor fuchsite. A composite grab sample of ferruginuous marble collected over a distance of 115 feet contained 0.04 ounces/ton Au, 0.24 ounces/ton Ag, and 0.05 % Zn (Herried, 1966, Table 1). Most of the bedrock in the area is a metasedimentary schist and marble sequence of Lower Paleozoic age (Till and others, 1986).
Workings: Small, hand dug prospecting pits may be present.
Age: Epigenetic mineralization in metamorphic rocks of Seward Peninsula is primarily of Cretaceous age. Some lode gold deposits on southern Seward Peninsula are mid-Cretaceous in age (see Midnight Mountain, BN047).
Alteration: The occurrence is oxidized and the dolomitic marble is replaced by sulfides and phyllosilicates.

Commodities (Major) - Au; (Minor) - Ag, Zn
Development Status: No
Deposit Model: Replacement in marble

Mineral List



6 entries listed. 3 valid minerals.

The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Herried, 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. Till, A.B., Dumoulin, J.A., Gamble, B. ., Kaufman, D.S., and Carroll, P.I., 1986, Preliminary geologic map and fossil data, Soloman, Bendeleben, and southern Kotzebue quadrangles, Seward Peninsula, Alaska: U.S. Geological Survey Open-File Report 86-276, 10 p., 3 plates, scale 1:250,000.

 
Mineral and/or Locality  
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