| Deposit ID | 10100957 |
|---|---|
| MRDS ID | A011313 |
| Record type | Site |
| Current site name | Golden Zone Mine |
| Geographic coordinates: | -149.65172, 63.21319 (WGS84) |
|---|
Political divisions (FIPS codes)
Matanuska-Susitna(Borough)
Alaska(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Healy A-6(quadrangle 1:63,360 scale)
Healy S(quadrangle 1:100,000 scale)
Healy(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Chulitna River(hydrologic unit)
Susitna River(hydrologic accounting unit)
South Central Alaska(hydrologic subregion)
Alaska(hydrologic region)
| Country | State |
|---|---|
| United States | Alaska |
| Commodity | Importance |
|---|---|
| Gold | Primary |
| Silver | Primary |
| Copper | Primary |
| Lead | Secondary |
| Zinc Critical | Tertiary |
| Antimony Critical | Tertiary |
| Tin Critical | Tertiary |
| Materials | Type of material |
|---|---|
| Arsenopyrite | Ore |
| Cassiterite | Ore |
| Galena | Ore |
| Malachite | Ore |
| Pyrite | Ore |
| Sphalerite | Ore |
| Stibnite | Ore |
| Epidote | Gangue |
| Tourmaline | Gangue |
| Result | 100 FT LEVEL: 0.18 OZ/TON AU, 3.4 OZ/TON AG, 10.4% FE, 4.1% AS, 0.97% CU, 0.05% PB, 0.32% ZN |
|---|---|
| Result | 200 FT LEVEL: 0.23 OZ/TON AU, 1.25 OZ/TON AG, 9.5% FE, 14.9% AS, 0.24% CU, 0.05% PB, 0.05% ZN, COMPOSITE CHANNEL SAMPLES USED IN MILL TESTS, USGS PP 758-B, P. B15 |
| Result | ATOMIC ABSORPTION ANALYSIS OF ARSENOPYRITE-RICH VEIN: 36.0 PPM AU, 30 PPM AG, GREATER THAN 10,000 PPM AS, 15 PPM BI |
| Result | 10PPM CO, 2000 PPM CU, 15PPM NI, 500 PPM PB, 500 PPM SB, 15 PPM NI, 3 PPM FE |
| Result | ARSENOPYRITE-RICH BRECCIA: 14.8 PPM AU, 105 PPM AG, GREATER THAN 10,000 PPM AS, 50PPM BI, TRACE CO, 5000 PPM CU, TRACE NI, 700 PPM PB, 500 PPM SB, 50PPM SN, 2000 PPM ZN, 15 PPM FE, (SEMIQUANTITATIVE DATA), USGS PP 758-B, P. B16 TABLE 4 |
| Host or associated | Associated | ||
|---|---|---|---|
| Rock type | Sedimentary Rock > Clastic Sedimentary Rock > Siltstone | ||
| |||
| Host or associated | Host |
|---|---|
| Rock type | Plutonic Rock > Mafic Intrusive Rock > Diorite |
| Rock unit name | Golden Zone Stock |
| Rock description | Golden Zone Stock |
| (1) | -149.65172, 63.21319 |
|---|
| Type of structure | Local |
|---|---|
| Structure description | Bryn Mawr Fault Bounds The Eastern Extent Of Golden Zone Mineralization |
| General form | PIPE |
|---|---|
| Length | 91.44M |
| Width | 60.96M |
| Depth to bottom | 457.2M |
| Development status | Past Producer |
|---|---|
| Commodity type | Metallic |
| Deposit size | Small |
| Significant | No |
| Discovery year | 1909 |
| Year of first production | 1941 |
| Year of last production | 1942 |
| Type of workings | Surface/Underground |
|---|---|
| Length | 579.12M |
| Overall depth | 152.4M |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | A011313 |
USGS BULL 692, P.221, 226-227, 230
USGS BULL 849-E, P. 309-310, 321-326
USBM RI 5245, P. 1, 6-8
USGS BULL 1246, P. 26
USBM OFR 9-67, P. 6-25
USGS CIRC 564, P. 1, 4-9
USGS OFR 305, P. 1-16
USGS PP 758-B, P. B12-B16, B20-B21, B23, B31-B35, B40
ADGGS GR 55, P. 27
USBM OFR 24-78, P. 4-76 TO 4-76 TO 4-86 AND FIG 4.2-A(1)
USGS OFR 9-67, P. 13
| Subject category | Comment text |
|---|---|
| Deposit | BRECCIA PIPE IN BIOTITE QUARTZ DIORITE PORPHRY; RELATIVELY HIGH GRADE ORE IN OUTER MARGINAL ZONE COMPOSED OF SLIGHTLY ROTATED ANGULAR BLOCKS OF ALTERED PORPHYRY CEMENTED IN A MATRIX OF ARSENOPYRITE, QUARTZ AND CUT BY MANY SMALL QUARTZ SULFIDE VEINS; LEAN INNER CORE OF PIPE IS SHATTERED QUARTZ PORPHYRY CARRYING SULFIDES DISSEMINATED AND ON FRACTURE SURFACES; HALO OF SLIGHTLY MINERALIZED (0.04 OZ/TON AU) PORPHYRY SURROUNDS THE PIPE |
| Deposit | MOST IMPORTANT MINE OF THE DISTRICT; ANOMALOUS AMOUNTS OF SN, MO, BI, CD, AND B REPORTED; DRILL CORE DATA AND MILL TESTS SUGGEST A PERIPHERAL AND UPWARD ENRICHMENT OF CU AND AU RELATIVE TO AS; IT APPEARS GEOLOGICALLY POSSIBLE, BASED ON THE SIZE OF AEROMAGNETIC AND GEOCHEMICAL ANOMALIES, THAT THE EXISTING BRECCIA PIPE IS A SURFACE EXPRESSION OF A DEPOSIT IN THE TENS OF MILLIONS OF TONS CLASS, USBM OFR 24-78, P. 4-85 ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-DEC-1984 | Leonard, Kenneth R. (Elliott, R. L.) | U.S. Geological Survey | |
| Editor | 13-APR-1994 | Mosier, Dan | U.S. Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.
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