Deposit ID | 10001791 |
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MRDS ID | A012593 |
Record type | Site |
Current site name | Big Hurrah Mine |
Related records | 10233038 |
Geographic coordinates: | -164.24049, 64.65181 (WGS84) |
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Relative position | 65 KM E OF NOME, AK. |
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Country | State |
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United States | Alaska |
Commodity | Importance |
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Gold | Primary |
Silver | Secondary |
Tungsten | Tertiary |
Zinc | Tertiary |
Copper | Tertiary |
Materials | Type of material |
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Chalcopyrite | Ore |
Electrum | Ore |
Scheelite | Ore |
Sphalerite | Ore |
Albite | Gangue |
Pyrite | Gangue |
Quartz | Gangue |
Sericite | Gangue |
Result | 1) RIBBON QUARTZ AU VEINS GRADE 0.4-3.5 OZ/TON AU WITH AVG. AU/AG RATIO OF 9:1 |
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Result | 5-FT INTERVALS OF PHYLLONITE IN WHICH AT LEAST ONE QUARTZ-ALBITE-ARSENOPYRITE VEIN OCCURS HAVE GRADES OF ABOUT 0.3 PPM |
Result | ECON. GEOL., V. 81, NO. 7, P. 1766-7 |
Result | 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 |
Result | RATIO OF 1 OZ AU TO 6 OZ AG |
Result | ADGGS GR 33, P. 13, TABLE 1. |
(1) | -164.24049, 64.65181 |
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Type of structure | Local |
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Structure 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. |
Strike | NW |
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Dip | 50-60 DEGREES SW |
Development status | Producer |
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Commodity type | Metallic |
Deposit size | Small |
Significant | No |
Discovery year | 1900 |
Year of first production | 1903 |
Type | In-situ | |||||||||||||||||||||
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Estimate year | 1978 | |||||||||||||||||||||
Total resources | 105,000,000mt ore | |||||||||||||||||||||
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Type | In-situ | ||||||||||||||
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Estimate year | 1978 | ||||||||||||||
Total resources | 5,000,000mt ore | ||||||||||||||
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Type of workings | Surface/Underground |
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Length | 640.08M |
Overall depth | 76.2M |
Agency | Database name | Acronym | Record ID | Notes |
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USGS | Mineral Resources Data System | MRDS | A012593 |
ECON. GEOL., V. 81, NO. 7, P. 1760-1774.
ADGGS SR 39, P. 6.
USGS OFR 78-1-C, P. 42.
ADGGS GR 33, P. 2, 5-6, 12-14, 21, 29.
USGS OFR 4, P. 1-2, 4.
USGS BULLETIN 722, P. 163, 173-174, 198, 200-204.
USGS BULLETIN 433, P. 93, 139, 143-147.
USGS BULLETIN 328, P. 223, 228-231.
BAG-MF-445-19
ECON. GEOL., V. 81, NO. 7, P. 1760.
Subject category | Comment text |
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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. |
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 |
Type | Date | Name | Affiliation | Comment |
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Reporter | 01-MAR-1987 | Leonard, Kenneth R. (Huber, Donald F.) | U.S. Geological Survey |