| Deposit ID | 10014102 |
|---|---|
| MRDS ID | D010732 |
| Record type | Site |
| Current site name | Merrimac Mine |
| Alternate or previous names | Merrimac Group, Patented Claims: Merrimac, MS 6200a, Wild Cat, MS 6200a, Telluride, MS 6200a, Bismuth, MS 6200a, Merrimac Mill Site, MS 6200b |
| Related records | 10167071 |
| Geographic coordinates: | -106.54116, 37.34974 (WGS84) |
|---|---|
| Elevation | 3066 |
| Relative position | 2300 FT S 73 W FROM PLATORO |
Political divisions (FIPS codes)
Conejos(county)
Colorado(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Platoro(quadrangle 1:24,000 scale)
Antonito(quadrangle 1:100,000 scale)
Durango(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Conejos(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 | Conejos |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| New Mexico | 036N | 004E | 15,22 | SW OF SW (15); NW (22) | Colorado |
| Commodity | Importance |
|---|---|
| Gold | Primary |
| Silver | Primary |
| Copper | Secondary |
| Lead | Secondary |
| Molybdenum | Tertiary |
| Zinc Critical | Tertiary |
| Antimony Critical | Tertiary |
| Materials | Type of material |
|---|---|
| Chalcocite | Ore |
| Covellite | Ore |
| Digenite | Ore |
| Electrum | Ore |
| Ferrimolybdite | Ore |
| Galena | Ore |
| Gold | Ore |
| Marcasite | Ore |
| Miargyrite | Ore |
| Molybdenite | Ore |
| Polybasite | Ore |
| Proustite | Ore |
| Pyrargyrite | Ore |
| Pyrrhotite | Ore |
| Silver | Ore |
| Sphalerite | Ore |
| Zinkenite | Ore |
| Quartz | Gangue |
| Model code | 154 |
|---|---|
| USGS model code | 25e |
| Deposit model name | Epithermal quartz-alunite Au |
| Mark3 model number | 38 |
| Host or associated | Associated | ||||||
|---|---|---|---|---|---|---|---|
| Rock type | Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Quartz Latite | ||||||
| Rock unit name | La Jara Canyon Member Of Treasure Mountain Tuff | ||||||
| Rock description | La Jara Canyon Member Of Treasure Mountain Tuff | ||||||
| |||||||
| Host or associated | Host |
|---|---|
| Rock type | Metamorphic Rock > Gneiss |
| Host or associated | Host | ||||||
|---|---|---|---|---|---|---|---|
| Rock type | Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Quartz Latite | ||||||
| Rock unit name | La Jara Canyon Member Of Treasure Mountain Tuff | ||||||
| Rock description | La Jara Canyon Member Of Treasure Mountain Tuff | ||||||
| |||||||
| (1) | -106.54116, 37.34974 |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | San Juan Volcanic Field |
| Type of structure | Local |
| Structure description | Platoro Caldera, Summitville Caldera, Platoro Fault Zone, Cornwall Block |
| Thickness | 29.87M |
|---|
| Development status | Past Producer |
|---|---|
| Commodity type | Metallic |
| Deposit size | Small |
| Significant | No |
| Discoverer | Jerome B. Frank (Claimant) |
| District name | Ute (Platoro) District |
|---|
| Ownership category | Private |
|---|
| Type of workings | Surface/Underground |
|---|---|
| Length | 125.27M |
| Overall depth | 53.34M |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | D010732 | |
| U.S. Bureau of Mines | Minerals Availability System | MAS | 0080210024 |
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.
BIRD, W.H., 1972, MINERAL DEPOSITS OF THE SOUTHERN PORTION OF THE PLATORO CALDERA COMPLEX, SOUTHEAST SAN JUAN MOUNTAINS, COLORADO: MTN. GEOLOGIST, V. 9, NO. 4, P. 379-387.
WORCESTER, P.G., 1919, MOLYBDENUM DEPOSITS OF COLORADO WITH GENERAL NOTES ON THE MOLYBDENUM INDUSTRY: CGS BULL. 14, P. 52.
BLM MINERAL SURVEY MS 6200A&B
BIRD, W.H., 1973, THE DEVELOPMENT OF THE SOUTHERN PORTION OF THE PLATORO CALDERA COMPLEX AND ITS RELATED MINERAL DEPOSITS, SOUTHEAST SAN JUAN MOUNTAINS, COLORADO: COLORADO SCHOOL OF MINES THESIS T-1440.
| Subject category | Comment text |
|---|---|
| Deposit | MINE DEVELOPED ON MERRIMAC FAULT, ONE OF SEVERAL PRINCIPAL QUARTZ-PYRITE VEINS IN PLATORO FAULT ZONE. FAULT TRENDS GENERALLY N 40 W, DOWNDROPPED TO NE, BUT CHANGES TO GENERALLY N 20 W SOUTH OF ITS INTERSECTION WITH ENE-TRENDING EMMA FAULT ABOUT 0.35 MILE SE OF MINE. EXTENSION OF FAULT TO NW BEYOND MIX LAKE CAMPGROUND IS UNCERTAIN; BIRD (1973) INFERS EXTENSION SE INTO BIG LAKE RADIAL FRACTURE SYSTEM. WORCESTER (1919) DESCRIBES OUTCROPPING OF 2-INCH QUARTZ VEIN CARRYING MOLYBDENITE AND TRENDING N 15 TO 17 W, VERTICAL. IT WAS BELIEVED THAT SAME VEIN WAS CUT IN UPPER DRIFTS OF MINE. |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-JUN-1983 | Schwochow, Stephen D. (King, Robert U.) | Colorado Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.
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