| Deposit ID | 10014036 |
|---|---|
| MRDS ID | D010650 |
| Record type | Site |
| Current site name | Golconda Mine |
| Alternate or previous names | Golconda No. 1, Golconda No. 2 |
| Related records | 10288894 |
| Geographic coordinates: | -106.59754, 37.42113 (WGS84) |
|---|---|
| Elevation | 3641 |
| Relative position | 0.65 MILES S 21 W FROM SUMMITVILLE |
Political divisions (FIPS codes)
Rio Grande(county)
Colorado(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Summitville(quadrangle 1:24,000 scale)
Antonito(quadrangle 1:100,000 scale)
Durango(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Alamosa-Trinchera(hydrologic unit)
Rio Grande Headwaters(hydrologic accounting unit)
Rio Grande Headwaters(hydrologic subregion)
Rio Grande(hydrologic region)
Federal lands
Rio Grande National Forest(National Forest)
National Forest FS(Type of land area)
FS(Federal land areas administered by FS)
| Country | State | County |
|---|---|---|
| United States | Colorado | Rio Grande |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| New Mexico | 037N | 004E | 30 | NE OF SW | Colorado |
| Commodity | Importance |
|---|---|
| Gold | Primary |
| Silver | Primary |
| Copper | Secondary |
| Lead | Secondary |
| Materials | Type of material |
|---|---|
| Galena | Ore |
| Sphalerite | Ore |
| Barite | Gangue |
| Model code | 85 |
|---|---|
| USGS model code | 22c |
| Deposit model name | Polymetallic veins |
| Mark3 model number | 46 |
| Host or associated | Associated | ||||
|---|---|---|---|---|---|
| Rock type | Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Quartz Latite | ||||
| Rock unit name | Quartz Latite Of South Mountain;Summitville Andesite | ||||
| Rock description | Quartz Latite Of South Mountain;Summitville Andesite | ||||
| |||||
| Host or associated | Associated |
|---|---|
| Rock type | Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite |
| Host or associated | Host |
|---|---|
| Rock type | Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Quartz Latite |
| Rock unit name | Quartz Latite Of South Mountain;Summitville Andesite |
| Rock description | Quartz Latite Of South Mountain;Summitville Andesite |
| (1) | -106.59754, 37.42113 |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | San Juan Volcanic Field |
| Type of structure | Local |
| Structure description | Platoro Caldera, Summitville Caldera, Summitville Fault, South Mountain Dome |
| Development status | Past Producer |
|---|---|
| Commodity type | Metallic |
| Deposit size | Small |
| Significant | No |
| District name | Summit (Summitville) District |
|---|
| Ownership category | Private |
|---|
| Type of workings | Surface/Underground |
|---|---|
| Length | 1112.52M |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | D010650 | |
| U.S. Bureau of Mines | Minerals Availability System | MAS | 0081050012 |
PATTON, H.B., 1917, GEOLOGY AND ORE DEPOSITS OF THE PLATORO-SUMMITVILLE MINING DISTRICT, COLORADO: CGS BULL. 13.
LIPMAN, P.W., 1974, GEOLOGIC MAP OF THE PLATORO CALDERA AREA, SOUTHEASTERN SAN JUAN MOUNTAINS, SOUTHWESTERN COLORADO: USGS MAP I-828.
| Subject category | Comment text |
|---|---|
| Deposit | MINE DEVELOPED PRINCIPALLY ON BLACK WONDER (OR GOLCONDA) VEIN, MCDONALD VEIN, AND AZTEC VEIN, AND SECONDARILY ON TEWKSBURY VEIN, AZTEC VEIN IS OVAL PIPE IN HIGHLY SILICIFIED QUARTZ LATITE SURROUNDED BY ENVELOPE OF SOFT HIGHLY ARGILLIZED ALTERATION OVER TOP OF PIPE AT SE END. BETWEEN IOWA AND AZTEC 1 LEVELS, DEPOSIT IS CROSS-SHAPED AND SUGGESTS LOCALIZATION BY INTERSECTING FRACTURES. NORTH END OF AZTEC VEIN INTERSECTED BY N 50 TO 60 W TRENDING MCDONALD VEIN, AN IRREGULAR AND DISCONTINUOUS FRACTURE ZONE THAT ALSO INTERSECTS SOUTH END OF BLACK WONDER VEIN AND REFLECTS LOCALIZATION OF MINERALIZATION/ALTERATION BY INTERSECTION OF FRACTURES IN VEIN ZONE COMPLEX. DIP OF MCDONALD VEIN VARIES FROM 80 NE NEAR BLACK WONDER INTERSECTION TO NEAR VERTICAL FARTHER TO SE. BLACK WONDER VEIN TRENDS SUBPARELLEL TO TEWKSBURY VEIN AT N 10 TO 30 W AND MAY JOIN WITH IT ON IOWA LEVEL. PATTON (1917) DESCRIBES BLACK WONDER (OR GOLCONDA) VEIN AS CONTAINING UPPER OXIDIZED ORE ZONE 50 TO 300 FT IN DEPTH AND LOWER |
| Deposit | UNOXIDIZED SULFIDE ORE ZONE. IN OXIDIZED ZONE, FREE AU OCCURS IN LIMONITE OR LIMONITE-CLAP MIXTURE OR IN FE-STAINED QUARTZ GANGUE; NO CU. SULFIDE ZONE CONTAINS AURIFEROUS AND SLIGHTLY ARGENTIFEROUS PIR ITE, ENARGITE,AND SPORATIC GALENA AND SPHALERITE. |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-JUN-1983 | Schwochow, Stephen D. | Colorado Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.
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