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Big Blue

Prospect in Alaska, United States with commodity Gold
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Geologic information

Identification information

Deposit ID 10308575
Record type Site
Current site name Big Blue

Geographic coordinates

Geographic coordinates: -148.01095, 64.87466 (WGS84)
Relative position The Big Blue prospect is located west of Henderson Road, just west of the Prometheus shaft (FB041), at an elevation of approximately 1,550 feet (Hill, 1933, p. 148). It is about 1.3 miles east-southeast of the top of Ester Dome, in the NW1/4 sec. 32, T. 1 N., R. 2 W., Fairbanks Meridian.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Gold Ore

Nearby scientific data

(1) -148.01095, 64.87466
ListMap

Comments on the geologic information

  • Geologic Description = Material on the dump suggests the ore zone consisted of a fault zone of crushed schist, quartz, and gouge (Hill, 1933, p. 148). The vein strikes N. 27 E., but a dip could not be determined at the time of Hill's visit in 1931, due to the collapse of the prospect pits. The bedrock is mainly biotite schist; many pieces of quart-mica schist are on several of the dumps. The Big Blue prospect is in a unit of quartz-muscovite schist, quartzite, and chlorite-quartz schist of the Fairbanks Schist as mapped by Newberry and others (1996).

Economic information

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Fairbanks

Comments on the workings information

  • Workings / Exploration = In 1931, the Big Blue lead consisted of a number of shallow shafts and pits (Hill, 1933, p. 148).

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Alaska Resource Data File ARDF FB039

Bibliographic references

  • Deposit

    Hill, J.M., 1933, Lode deposits of the Fairbanks District, Alaska: U.S. Geological Survey Bulletin 849-B, p. 29-163.

  • Deposit

    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.

Comments on the references

  • Primary Reference = Hill, 1933

General comments

Subject category Comment text
Deposit Model Name = Schist-hosted gold-quartz vein

Reporter information

Type Date Name Affiliation Comment
Reporter 31-JUL-2001 J.R. Guidetti Schaefer and C.J. Freeman Avalon Development Corporation