Big Four Mineral Cr. Mine

The Big Four Mineral Cr. Mine 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

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.

Site Name

Primary: Big Four Mineral Cr. Mine

Commodity

Primary: Gold
Tertiary: Lead
Tertiary: Zinc

Location

State: Alaska
District: Port Valdez

Land Status

Land ownership: State
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.

Holdings

Not available

Workings

Type: Underground

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1914
Year Last Production: 1939
Discovery Year: 1911
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

Not available

Mineral Deposit Model

Not available

Orebody

Form: QUARTZ VEIN

Structure

Type: L
Description: Veins Are Offset By Faults Trending N 10 To 20 E

Alterations

Not available

Rocks

Name: Slate
Role: Host
Age Type: Host Rock
Age Young: Late Cretaceous

Name: Slate
Role: Host
Age Type: Host Rock Unit
Age Young: Late Cretaceous

Analytical Data

Analytical Data: NO DATA

Materials

Ore: Galena
Ore: Gold
Ore: Sphalerite
Gangue: Pyrite
Gangue: Quartz

Comments

Comment (Location): SEE VALDEZ A-7 QUADRANGLE; LOCATION IS PLOTTED AS ADIT SYMBOL. LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).

Comment (Production): UNKNOWN BUT SMALL AMOUNT OF ORE MILLED ON PROPERTY IN 1921, 1922, 1934, 1937 AND PROBABLY IN 1939

Comment (Development): LOCATED 1911; MILL INSTALLED 1914; INTERMITTENT ACTIVITY 1914 TO 1939

Comment (Deposit): SHATTERED QUARTZ VEINS 1 TO 5 FT THICK; STRIKE: N 55 TO 80 E, DIP:70 TO 80 N; CUT OUT BY FAULTS IN AT LEAST 2 PLACES

Comment (Workings): 450 FT OF UNDERGROUND WORKINGS DRIVEN BY 1921, NOT INCLUDING STOPES; PROBABLY WAS MORE WORK DONE IN LATER YEARS; PRESENT CONDITION UNKNOWN

Comment (Deposit): SEE ALSO: BIG FOUR (MCALLISTER CR.) ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT

References

Reference (Deposit): USGS BULL 520, P. 125

Reference (Deposit): USGS BULL 622, P. 153, 164-165

Reference (Deposit): USGS BULL 880-A, P. 23-24

Reference (Deposit): USGS MF-438, LOC. 22

Reference (Deposit): USGS OFR 80-892B, LOC. 19

Reference (Other Database): BAG-OFR-80-892B-19

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