Alaska Endicott Mine

The Alaska Endicott Mine is a gold and silver 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: Alaska Endicott Mine
Secondary: William Henry Bay Mine

Commodity

Primary: Gold
Primary: Silver
Secondary: Copper

Location

State: Alaska
District: Juneau/William Henry Bay

Land Status

Land ownership: National Forest
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: Surface/Underground

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

Not available

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Type: L
Description: Many Small Displacement Faults

Alterations

Not available

Rocks

Name: Limestone
Role: Associated
Age Type: Host Rock
Age Young: Late Permian

Analytical Data

Analytical Data: CALCITE VEINS WITH 10-20% QUARTZ, 1-3% PYRITE AND 1-2% CHALCOPYRITE CONTAINED 0.5-1.0% CU, 0.5% ZN AND 10-15 PPM AG

Materials

Ore: Chalcopyrite
Gangue: Quartz
Gangue: Calcite
Gangue: Pyrite
Gangue: Chalcedony

Comments

Comment (Deposit): FAULTED QUARTZ-CALCITE BRECCIA VEIN; 10 FT AVE THICKNESS; CARRYINGCHALCOPYRITE, PYRITE AND LOW AU-AG VALVES; MANY ANGULAR FRAGMENTS OF PARTLY REPLACED GREENSTONE IN VEIN

Comment (Workings): DEVELOPED BY 2400 FT OF ADITS, DRIFTS AND RAISES AND 3 SMALL STOPES; VEIN LOST 1350 FT FROM PORTAL, FAULTED OFF SECTION NEVER FOUND; WORKINGS OPEN (1985)

Comment (Geology): COUNTRY ROCK IN GENERAL AREA: FOLDED LIMESTONE WITH INTERBEDDED ARGILLITE, CHERT, GREENSTONE FLOWS, GREENSTONE TUFFS AND GRAYWACKE; CUT BY DIABASE DIKES

Comment (Deposit): SEE ALSO: LUCKY SIX CLAIMS ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT

Comment (Location): ADGGS GR 44, P. 14, FIG. 4 LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).

Comment (Commodity): ORE PRODUCED WAS ABOUT 8% SULFIDES; REMAINING ORE CONTAINS 2% CU ORLESS

Comment (Development): ACTIVE 1915-1923; VERY MINOR PRODUCTION PRIOR TO 1919; MILL INSTALLED 1922; SHIPMENT OF CU ORE IN 1923

References

Reference (Deposit): USGS BULL 714, P. 19, 109-112

Reference (Deposit): USGS BULL 963-A, P. 28-30

Reference (Deposit): USGS BULL 1246, P. 162

Reference (Deposit): ADGGS GR44, P. 15

Reference (Deposit): USGS OFR 85-717, P. 43

Reference (Other Database): BAG-OFR-85-717-030

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