Grant Mine

The Grant 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: Grant Mine

Commodity

Primary: Gold
Tertiary: Antimony
Tertiary: Lead
Tertiary: Tungsten

Location

State: Alaska
District: Fairbanks

Land Status

Not available

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Producer
Operation Type: Unknown
Year First Production: 1931
Discovery Year: 1929
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

Not available

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: Breccia Zones Heavily Oxidized In Places

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Gold
Ore: Galena
Ore: Scheelite
Gangue: Goethite
Gangue: Muscovite

Comments

Comment (Deposit): INFORMATION FROM MRDS RECORD NUMBER A010696 WAS INCORPORATED INTO THIS RECORD AND DELETED BY DAVE FRANK, SPOKANE MIO, 1/94.

Comment (Workings): PRINCIPAL UNDERGROUND WORKINGS CONSIST OF OVER 2,700 FT. OF DRIFTS, CROSSCUTS, AND RAISES ON THE 100, 150, AND 200 FT. LEVELS OF THE IRISHMAN SYSTEM, AND THE 80, 120, AND 200 FT. LEVELS OF THE O'DEA BRECCIA ZONE.

Comment (Geology): THE O'DEA BRECCIA ZONE TRENDS OBLIQUELY TO THE IRISHMAN VEIN FAULT WITH AN AVERAGE STRIKE OF N 45-54 E. IF THE STRIKE AND DIP OF THE O'DEA-BRECCIA AND IRISHMAN ZONES PERSIST AT DEPTH, THEY MAY INTERSECT BELOW THE 200 FT. LEVEL. WIDTH OF THE ORE STRUCTURES IN ALL SYSTEMS APPEAR TO BE CONTROLED BY THE RELATIVE COMPETENCY OF THE HOST ROCK.

Comment (Deposit): PRINCIPAL LODES ARE IRISHMAN VEIN AND O'DEA BRECCIA ZONE. THE IRISHMAN VEIN FAULT CONTAINS AT LEAST THREE AGES OF VEIN QUARTZ; LATE STAGE SILICA INJECTION WAS ACCOMPANIED BY FREE GOLD, ARSENOPYRITE, LEAD-ANTIMONY SULFOSALTS, AND SCHEELITE. ORE FLUIDS WERE EMPLACED ALONG A FAULT ZONE TRENDING SINUOUSLY N 20-40 E AND DIPPING STEEPLY TO THE SE. VEIN WIDTHS VARY FROM 3 TO OVER 22 IN. O'DEA BRECCIA ZONE: AURIFEROUS QUARTZ BRECCIA CEMENTED BY IRON, ARSENIC, AND ANTIMONY OXIDES, BROKEN SCHIST FRAGMENTS, MYLONITE, AND MINOR SULFIDE ZONES. VEIN-FAULT WIDTHS VARY FROM 6 IN. TO OVER 6 FT., AND AVERAGE 42 IN. MULTIPLE SILICA INJECTIONS OCCURRED ALONG THE O'DEA BRECCIA ZONE; RECURRENT MOVEMENT ALONG THE VEIN-FAULT ZONE RESULTED IN HEAVILY OXIDIZED BROKEN AND BRECCIATED ZONES.

Comment (Location): USGS MF-410, LOC. 21. MINE MARKED ON FAIRBANKS (D-2) ALONG ST. PATRICK RD ON THE SE FLANK OF ESTER DOME. LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).

Comment (Development): AURIFEROUS QUARTZ VEIN DISCOVERED AT BOTTOM OF PLACER PROSPECT SHAFT, 1929. AS OF 1931 THERE WERE 250 FT. OF DRIFTS ON 2 LEVELS AND 500-600 TONS OF ORE THAT RETURNED ABOUT 1 OZ./TON HAD BEEN MINED. MINING IN 1937 REPORTED. UNREPORTED MINING OCCURRED IN OTHER YEARS. MUCH EXPLORATION AND DEVELOPMENT WORK BY TRICON INC IN THE 1980'S ON THE IRISHMAN VEIN AND O'DEA BRECCIA ZONE; OTHER DEPOSITS HAVE BEEN DISCOVERED DURING UNDERGROUND DRIFTING, DRILLING PROGRAMS, AND GEOPHYSICAL INVESTIGATIONS. PRESENT PRODUCTION BY TRICON INC., WHO NOW HAS A GRAVITY-FEED MILL FACILITY THERE, IS LIKELY.

References

Reference (Deposit): USGS MF-410 (D-2), LOC. 21

Reference (Deposit): ADDGS OF 141, P. 1-2.

Reference (Deposit): USGS BULL. 849-B, P. 150-151

Reference (Deposit): USGS OFR 76-662, P. 65

Reference (Deposit): MINING JOUNAL, APRIL 27, 1984, P. 285

Reference (Deposit): ADGGS SPEC REPT 31, P. 11.

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