Big Hurrah Mine

The Big Hurrah 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

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Site Name

Primary: Big Hurrah Mine

Commodity

Primary: Gold
Secondary: Silver
Tertiary: Tungsten
Tertiary: Zinc
Tertiary: Copper

Location

State: Alaska

Land Status

Not available

Holdings

Not available

Workings

Type: Surface/Underground

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Producer
Operation Type: Unknown
Year First Production: 1903
Discovery Year: 1900
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

Not available

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Type: L
Description: Nw Trending Trhust Fault Dips 30 Degrees S At Mine Site; Set Of High Angle Conjugate Faults Trend Nw With 50-60 Degrees Sw Dips, Contain Au Veins; Offset By Nne Trending, Se Dipping Faults.

Alterations

Alteration Type: L
Alteration Text: Silicification, Carbonatization, And Quartz-Carbonate Stockwork Assoc. With Type Iii Veins.

Rocks

Not available

Analytical Data

Analytical Data: ADGGS GR 33, P. 13, TABLE 1.
Analytical Data: RATIO OF 1 OZ AU TO 6 OZ AG
Analytical Data: 2) ASSAYS TAKEN ON SAMPLES FROM 70-FT LEVEL RAN 0.08-5.2 OZ/TON AU AND 0.5-17.2 OZ/TON AG
Analytical Data: ECON. GEOL., V. 81, NO. 7, P. 1766-7
Analytical Data: 5-FT INTERVALS OF PHYLLONITE IN WHICH AT LEAST ONE QUARTZ-ALBITE-ARSENOPYRITE VEIN OCCURS HAVE GRADES OF ABOUT 0.3 PPM
Analytical Data: 1) RIBBON QUARTZ AU VEINS GRADE 0.4-3.5 OZ/TON AU WITH AVG. AU/AG RATIO OF 9:1

Materials

Ore: Chalcopyrite
Ore: Electrum
Ore: Scheelite
Ore: Sphalerite
Gangue: Quartz
Gangue: Albite
Gangue: Pyrite
Gangue: Sericite

Comments

Comment (Workings): 60 DEGREE INCLINED SHAFT TO 250 FT LEVEL AND ABOUT 1800 FT OF LATERAL WORKINGS ON 3 LEVELS; FILLED WITH WATER (1969); SOME TRENCHES DUG IN EARLY 1980'S, 1985.

Comment (Geology): COUNTRY ROCKS IN GENERAL AREA CONSISTS OF CARBONACEOUS METASEDIMENTARY AND METAVOLCANIC ROCKS AND PELITIC SCHISTS THAT HAVE UNDERGONE REGIONAL BLUESCHIST GRADE METAMORPHISM.

Comment (Deposit): CONFLICTING REPORTS ON AU/AG RATIO AND SULFIDE CONTENT OF ORE; SEE ALSO: BIG HURRAH CREEK. ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT

Comment (Commodity): AG ALLOYED WITH AU IN ORE; SCHEELITE CONTENT OF ORE AVERAGES ABOUT 0.25%.

Comment (Location): MINE SYMBOL IS PRINTED ON USGS SOLOMON (C-5) TOPO. MAP. LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).

Comment (Production): SOME MINOR PRODUCTION MAY HAVE TAKEN PLACE LATER LTHAN 1907; THE ESTIMATE GIVEN IS FOR TOTAL PRODUCTION.

Comment (Development): MOST MINING WAS BETWEEN 1903 AND 1907; IN 1951, THE TOP OF THE LODE WAS EXCAVATED AND RUN THROUGH SLUICE BOXES; TAILINGS CYANIDED IN 1951-52; IN 1953-54, THE MINE WAS DEWATERED, NEW UNDERGROUND WORKINGS DRIVE, NEW MILL BUILT AND ABOUT 500 TONS OF ORE MINED; MINE CLOSED IN 1954 DUE TO FIRE AND UNSAFE GROUND; EXPLORATIONAL ACTIVITY, INCLUDING DRILLING, REPORTED IN 1980 AND 1983; CORNWALL PACIFIC/NIGHT HAWK RESOURCES JOINT VENTURE DRILLED 6500 FT OF DIAMOND CORE AND TRENCHED 2000 FT DURING 14-WEEK PERIOD IN 1985.

Comment (Deposit): FIVE TYPES OF VEINS OCCUR; TYPE I: QUARTZ +/- CARBONATE LENSES, 2 TO 7 CM THICK, LOCALLY CONTAIN MINOR SPHALERITE, CHLORITE AND ARSENOPYRITE; TYPE II: TABULAR VEINS 2 TO 5 MM THICK COMPOSED OF QUARTZ, CARBONATE, PYRITE, SPHALERITE AND CHALCOPYRITE; TYPE III: AU-BEARING RIBBON QUARTZ VEINS UP TO 4 M WIDE (AVE. 0.5 M) AND 40-80 FT LONG; OCCUPY NW-TRENDING FAULTS, RIBBON QUARTZ VEINS ARE COMPOSED OF QUARTZ (GREATER THAN 90%), DOLOMITE, ALBITE, SERICITE, SCHEELITE, ARSENOPYRITE, PYRITE AND NATIVE AU; THIN RIBBON-LIKE INCLUSIONS OF WALL ROCK ORIENTED PARALLEL TO VEIN WALLS; TOTAL SULFIDE CONTENT LESS THAN 2-3%; LESS THAN 1% SCHEELITE; TYPE IV: QUARTZ-ALBITE +/- ARSENOPYRITE VEINS 5-25 CM WIDE CONTAIN UP TO 25% ALBITE, UP TO 20% ARSENOPYRITE AND MINOR GOLD; THOUGHT TO BE SYNGENETIC WITH TYPE III VEINS; TYPE V: POST-MINERALIZATION CARBONATE-QUARTZ VEINLETS 2-3 MM THICK, CUT ALL OTHER VEIN TYPES.

References

Reference (Other Database): BAG-MF-445-19

Reference (Production): ECON. GEOL., V. 81, NO. 7, P. 1760.

Reference (Deposit): USGS BULLETIN 722, P. 163, 173-174, 198, 200-204.

Reference (Deposit): USGS BULLETIN 433, P. 93, 139, 143-147.

Reference (Deposit): USGS BULLETIN 328, P. 223, 228-231.

Reference (Deposit): ECON. GEOL., V. 81, NO. 7, P. 1760-1774.

Reference (Deposit): ADGGS SR 39, P. 6.

Reference (Deposit): USGS OFR 78-1-C, P. 42.

Reference (Deposit): ADGGS GR 33, P. 2, 5-6, 12-14, 21, 29.

Reference (Deposit): USGS OFR 4, P. 1-2, 4.

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