Engineer Prospect, Fairbanks District, Fairbanks North Star Borough, Alaska, USA

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Location: The Engineer prospect is located in the SE1/4SW1/4 sec. 7, T. 1 N., R. 1 E., Fairbanks Meridian. The prospect is located on the nose of the ridge between Little Blanche Creek and French Gulch; it is on the southwest side of Engineer Creek and southwest of the Old Steese Highway at an elevation of about 880 feet. The propsect is locality 24 of Cobb (1972 [MF 410]).
Geology: The Engineer prospect is located along a ridge composed of Fairbanks Schist, which consists of quartz-muscovite schist, quartzite, and chlorite-quartz schist (Newberry and others, 1996). A grab sample from two, parallel, iron-stained, arsenopyrite-bearing quartz veins oriented N. 70 E., assayed $2.86 per ton or 0.14 ounce of gold per ton (Hill, 1933, p. 153).
Workings: When visited by Hill in 1931, the few prospect pits were caved (Hill, 1933, p. 153).
Alteration: White quartz is iron-stained.

Commodities (Major) - Au
Development Status: None
Deposit Model: Schist-hosted gold-quartz vein

References

Chapman, R.M., and Foster, R.L., 1969, Lode mines and prospects in the Fairbanks district, Alaska: U.S. Geological Survey Professional Paper 625-D, 25 p., 1 plate. Cobb, E.H., 1972, Metallic mineral resources map of the Fairbanks quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-410, 1 sheet, scale 1:250,000. Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Fairbanks quadrangle, Alaska: U.S. Geological Survey Open-File Report 76-662, 174 p. Hill, J.M., 1933, Lode deposits of the Fairbanks district, Alaska: U.S. Geological Survey Bulletin 849-B, p. 29-163.

Mineral List

Arsenopyrite

Gold

2 entries listed. 2 valid minerals.