Breen East (Hobson)

The Breen East (Hobson) is a gold 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: Breen East (Hobson)

Commodity

Primary: Gold
Secondary: Antimony

Location

State: Alaska
District: Nome

Land Status

Not available

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Prospect
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
Ore: Pyrrhotite
Ore: Pyrite
Ore: Gold
Ore: Arsenopyrite
Gangue: Quartz

Comments

Comment (Deposit): Model Name = Sulfide-bearing quartz veins (?) in metasedimentary rocks.

Comment (Geology): Geologic Description = The Breen East prospect includes two claims patented in 1924, the Hobson Gold Lode and the adjacent Great American Lode. Hummel reported this to be an iron sulfide occurrence that may include arsenopyrite, pyrite, and, in some cases, pyrrhotite. The claims are immediately to the east of the northeastmost Sliscovich group of patented claims (NM086). The Breen East claims lie along a steep northeast-trending fault mapped by Hummel (1962, location 27 [MF 248]). Bundtzen and others (1994) show the same northeast-trending fault as a lineament that passes northerly into a fault. The country rock is interlayered calcareous schist, quartz-muscovite schist, and lesser amounts of marble, schistose marble and black quartz schist. Part of the area is underlain by a metagranodiorite (Hummel, 1962 [MF 248]) that approximately corresponds to a muscovite-bearing felsic metavolcanic schist mapped by Bundtzen and others (1994).

Comment (Exploration): Status = Active?

Comment (Workings): Workings / Exploration = Workings at the time of the patent application included six shafts, six surface cuts, and two discovery locations. The two claims were patented in 1924; there has been no recent exploration.

Comment (Reference): Primary Reference = Hummel, 1962 (MF 248)

References

Reference (Deposit): Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Nome quadrangle, Alaska: U.S. Geological Survey Open-File report 78-93, 213 p.

Reference (Deposit): Cobb, E.H., 1972, Metallic mineral resources map of the Nome quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-463, 2 sheets, scale 1:250,000.

Reference (Deposit): Hummel, C.L., 1962, Preliminary geologic map of the Nome D-1 quadrangle, Seward Peninsula, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-248, 1 sheet, scale 1:63,360.

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