Unnamed (at head of Eagle Creek)

The Unnamed (at head of Eagle Creek) is a antimony mine located in Alaska.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

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Site Name

Primary: Unnamed (at head of Eagle Creek)

Commodity

Primary: Antimony
Secondary: Gold
Secondary: Silver

Location

State: Alaska
District: Bonnifield

Land Status

Not available

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Years of Production:
Organization:
Significant:

Physiography

Not available

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Stibnite

Comments

Comment (Geology): Geologic Description = The divide between Lynx and Eagle Creeks is underlain by the California Creek Member of the Totatlanika Schist. It consists of gray quartz-orthoclase-sericite schist and augen gneiss (Wahrhaftig, 1970 [GQ 810]). In a report of antimony deposits in the Fairbanks area, Brooks (1916 [B 642-A]), states that where the lode has been opened, the limits of ore deposition appear to be within walls 3 to 4 feet apart, widening to as much as 10 feet in some places. The richest ore occurs in shoots, which appear to be pod or lens shaped. The largest of these shoots measured 40 feet in its longest dimension. The shoots are separated by an aggregate of quartz intergrown with stibnite and kidneys of stibnite, together with iron-stained fragments of the schist that form the country rock . Stibnite is the only important metallic mineral in the lode, but a little free gold and galena are also present, as well as possibly pyrite. The surface of the masses of stibnite shows considerable oxidation; secondary minerals form an incrustation half an inch or more in thickness. The larger ore shoots are composed of almost entirely stibnite with some quartz (Brooks, 1916 [B 642-A]). Antimony ore in float on the divide between Lynx Creek and Eagle Creeks was examined in 1942 by the Alaska Department of Mines (Joesting, 1942 [ATDM MR 194-11, p. 10-11]). High-grade, coarse, bladed stibnite float is scattered for 100 feet along the ridge (Joesting, 1943 [ATDM Pamph. 2]).

Comment (Exploration): Status = Inactive

Comment (Reference): Primary Reference = Joesting, 1942 (ATDM MR 194-11)

Comment (Workings): Workings / Exploration = There may have been some pits dug prior to 1916. Samples of stibnite were found in float (Joesting, 1942 [ATDM MR 194-11]).

References

Reference (Deposit): Brooks, A.H., 1916, Antimony deposits of Alaska: U.S. Geological Survey Bulletin 649, 67 p.

Reference (Deposit): Joesting, H.R., 1942, Antimony and tungsten deposits in the Fairbanks and adjacent districts: Alaska Department of Mines Miscellaneous Report 194-11, 25 p.

Reference (Deposit): 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.

Reference (Deposit): 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.

Reference (Deposit): Joesting, H.R., 1943, Strategic mineral occurrences in interior Alaska, supplement to pamphlet no. 1: Alaska Territorial Department of Mines Pamphlet 2, 26 p.

Reference (Deposit): Wahrhaftig, Clyde, 1970, Geologic map of the Fairbanks A-4 quadrangle, Alaska: U.S. Geological Survey Geologic Quadrangle Map GQ-810, 1 sheet, scale 1:63:360.

Reference (Deposit): Hill, H.A., and Associates, Ltd., 1965, Report on the Eagle Creek antimony mine, Fairbanks: Alaska Territorial Department of Mines Miscellaneous Report 58-9, 21 p., 1 map.

Reference (Deposit): Berg, H.C., and Cobb, E.H., 1967, Metalliferous Lode Deposits of Alaska. U.S. Geological Survey Bulletin 1246, 254 p.

Reference (Deposit): Joesting, H.R., 1942, Antimony and tungsten deposits in Fairbanks and adjacent areas: Alaska Department of Mines MR 194-11, 25 p.

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