Deposit ID | 10002400 |
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MRDS ID | A013318 |
Record type | Site |
Current site name | Crystal Gold Mine |
Alternate or previous names | Daisy Belle |
Related records | 10160840 |
Geographic coordinates: | -133.79253, 57.96808 (WGS84) |
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Elevation | 259 |
Relative position | 2.3 MI. SW OF SENTINAL PT. |
(click for info) |
Country | State |
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United States | Alaska |
Commodity | Importance |
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Gold | Primary |
Copper | Tertiary |
Materials | Type of material |
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Chalcopyrite | Ore |
Gold | Ore |
Pyrite | Gangue |
Quartz | Gangue |
Result | AVERAGE OF 45 SAMPLES: 0.29 TOZ/ST AU. PYRITE SAMPLE FROM VEIN: 6.46 TOZ/ST AU. USBM OFR 85-86, P. 47, LOC. 155. |
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Host or associated | Associated | ||
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Rock type | Metamorphic Rock > Amphibolite | ||
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Host or associated | Host |
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Rock type | Metamorphic Rock > Amphibolite |
(1) | -133.79253, 57.96808 |
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General form | LENS |
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Width | 3.05M |
Development status | Past Producer |
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Commodity type | Metallic |
Deposit size | Small |
Significant | No |
Discovery year | 1895 |
Discoverer | Bernard Heinz |
Year of first production | 1899 |
Year of last production | 1909 |
District name | Juneau |
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Ownership category | National Forest |
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Type of workings | Surface |
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Length | 701.04M |
Agency | Database name | Acronym | Record ID | Notes |
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USGS | Mineral Resources Data System | MRDS | A013318 |
USBM OFR 85-86, P. 46-47, FIG. 4, LOC. 155 (1986)
USBM OFR 91-86, P. 5, TABLE 2 (1986)
USGS OF 78-698, P. 10-11 (1978)
USGS MF-425, LOC. 1 (1972)
USBM-OFR-85-86-FIG-4-155
USBM OFR 91-86, P. 5, 17, 22, 24, 29, 30, 32, 35; ALSO USBM OFR 85-86, P. 46, 47
Subject category | Comment text |
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Deposit | CRYSTAL VEIN IS 1-10 FT. WIDE, AVERAGE WIDTH 4 FT., FILLS LOW-ANGLE FAULT ZONE THAT CUTS AMPHIBOLITE. QUARTZ IN VEIN IS DISCONTINUOUS AND FORMS LARGE LENSOID MASSES UP TO A FEW HUNDRED FT. LONG. VEIN INCLUDES ABUNDANT ALTERED AND UNALTERED WALLROCK FRAGMENTS, AND MANY QUARTZ, AND CALCITE-LINED VUGS. PYRITE CUBES COMMON IN BOTH QUARTZ AND FRAGMENTS, WITH SMALL CRYSTALS OF GOLD ON PYRITE FACES. CHALCOPYRITE LOCALLY PRESENT. PYRITE ALSO PRESENT IN MASSES UP TO 6 IN. THICK AND 10 FT. LONG. ALTERED AMPHIBOLITE EXTENDS A FEW IN. TO FEW FT. FROM VEIN. |
Type | Date | Name | Affiliation | Comment |
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Reporter | 01-JUN-1987 | Leonard, Kenneth R. (Huber, Donald F.) | U.S. Geological Survey |