Deposit ID | 10001362 |
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MRDS ID | A012103 |
Record type | Site |
Current site name | Comet Mine |
Related records | 10233596 |
Geographic coordinates: | -135.07456, 58.85531 (WGS84) |
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Country | State |
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United States | Alaska |
Commodity | Importance |
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Gold | Primary |
Copper | Tertiary |
Lead | Tertiary |
Materials | Type of material |
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Chalcopyrite | Ore |
Galena | Ore |
Calcite | Gangue |
Feldspar | Gangue |
Pyrite | Gangue |
Quartz | Gangue |
Result | ORE AVERAGED LESS THAN 0.5 OZ/TON AU, USGS BULL 1246, P. 160 |
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Host or associated | Associated | ||||||
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Rock type | Plutonic Rock > Mafic Intrusive Rock > Diorite | ||||||
Rock unit name | Jualin Diorite | ||||||
Rock description | Jualin Diorite | ||||||
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Host or associated | Host |
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Rock type | Plutonic Rock > Mafic Intrusive Rock > Diorite |
Rock unit name | Berners Formation |
Rock description | Berners Formation |
(1) | -135.07456, 58.85531 |
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Type of structure | Local |
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Structure description | Comet Vein Cut Off By Fault To The N; Extension Not Found |
Strike | N 5 E |
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Dip | 70 E |
Depth to bottom | 182.88M |
Width | 2.74M |
Length | 152.4M |
Development status | Past Producer |
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Commodity type | Metallic |
Deposit size | Small |
Significant | No |
Discovery year | 1891 |
Year of first production | 1894 |
Year of last production | 1901 |
District name | Juneau/Berner'S Bay |
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Ownership category | National Forest |
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Type of workings | Surface/Underground |
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Length | 1609.3M |
Overall depth | 198.12M |
Agency | Database name | Acronym | Record ID | Notes |
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USGS | Mineral Resources Data System | MRDS | A012103 |
USGS 18TH ANNUAL REPORT, PART 3, P. 76-77
USGS BULL 287, P. 136-137
USGS BULL 284, P. 32
USGS BULL 446, P. 42-43
USGS BULL 1246, P. 160
METZ, PAUL A. AND WIEBMER, JOHN D., 1977, M.I.R.L. SUMMARY FILE REPORT; EUREKA, KENSINGTON, COMET, JOHNSON AND JUALIN MINE, BERNER'S BAY, JUNEAU DISTRICT, ALASKA: UNPUBLISHED REPORT TO USBM, FIELD OPERATIONS CENTER, JUNEAU, AK.
USGS OFR 85-717, NO. J098
BAG-OFR-85-717-098
Subject category | Comment text |
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Deposit | SEE ALSO: KENSINGTON, JUALIN ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT |
Deposit | 2 QUARTZ VEINS ABOUT 50 FT APART; MOST PRODUCTION WAS FROM COMET VEIN, 300-500 FT LONG; AVERAGED 2 TO 3 FT IN WIDTH AT THE SURFACE, BUT WAS UP TO 9 FT THICK IN WORKINGS; VEINS CARRY PYRITE, CHALCOPYRITE, GALENA AND FREE GOLD |
Type | Date | Name | Affiliation | Comment |
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Reporter | 01-NOV-1985 | Leonard, Kenneth R. (Elliott, R. L.) | U.S. Geological Survey |