| Deposit ID | 10014127 |
|---|---|
| MRDS ID | D010771 |
| Record type | Site |
| Current site name | Iron Mine |
| Alternate or previous names | Patented Claim: Iron Mine, Ms 8758 |
| Related records | 10166738 |
| Geographic coordinates: | -108.01482, 37.70057 (WGS84) |
|---|---|
| Elevation | 2865 |
| Relative position | 1.0 MILES N 54 E FROM RICO |
Political divisions (FIPS codes)
Dolores(county)
Colorado(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Rico(quadrangle 1:24,000 scale)
Dove Creek(quadrangle 1:100,000 scale)
Cortez(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Upper Dolores(hydrologic unit)
Upper Colorado-Dolores(hydrologic accounting unit)
Upper Colorado-Dolores(hydrologic subregion)
Upper Colorado(hydrologic region)
Federal lands
San Juan National Forest(National Forest)
National Forest FS(Type of land area)
FS(Federal land areas administered by FS)
| Country | State | County |
|---|---|---|
| United States | Colorado | Dolores |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| New Mexico | 040N | 011W | 25 | E2 OF E2 | Colorado |
| Commodity | Importance |
|---|---|
| Silver | Primary |
| Copper | Primary |
| Zinc Critical | Secondary |
| Lead | Secondary |
| Materials | Type of material |
|---|---|
| Chalcopyrite | Ore |
| Pyrite | Ore |
| Sphalerite | Ore |
| Quartz | Gangue |
| Result | STOPED ORE CONTAINED 40 TO 70 OZ/TON AG, 2 TO 3% CU. 30% FE |
|---|
| Model code | 72 |
|---|---|
| USGS model code | 19a |
| Deposit model name | Polymetallic replacement |
| Mark3 model number | 47 |
| Host or associated | Associated | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Rock type | Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Latite | ||||||||
| Rock unit name | Hornblende Latite Porphyry | ||||||||
| Rock description | Hornblende Latite Porphyry | ||||||||
| |||||||||
| Host or associated | Host |
|---|---|
| Rock type | Sedimentary Rock > Carbonate > Limestone |
| Rock unit name | Hermosa Formation |
| Rock description | Hermosa Formation |
| (1) | -108.01482, 37.70057 |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | San Juan Uplift, Paradox Basin |
| Type of structure | Local |
| Structure description | Rico Dome, Nellie Bly Fault, Unnamed Fault |
| Development status | Past Producer |
|---|---|
| Commodity type | Metallic |
| Deposit size | Small |
| Significant | No |
| Discovery year | 1882 |
| Year of last production | 1920 |
| District name | Pioneer (Rico) District |
|---|
| Ownership category | National Forest |
|---|---|
| Area name | San Juan N. F. |
| Type | Operator |
|---|---|
| Owner | John Doyle Mining And Milling Co. |
| Home office | Rico, Co. |
| First year | 1920 |
| Type | Owner |
|---|---|
| Owner | H. Obendorfer And Matt Jacobson |
| Home office | Rico, Co. |
| First year | 1920 |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | D010771 | |
| U.S. Bureau of Mines | Minerals Availability System | MAS | 0080330102 |
RANSOME, F.L., 1901, THE ORE DEPOSITS OF THE RICO MOUNTAINS, COLORADO: USGS 22D ANN. REPT., PT. 2, P. 383-385.
MCKNIGHT, E.T., 1974, GEOLOGY AND ORE DEPOSITS OF THE RICO DISTRICT, COLORADO: USGS PROF. PAPER 723.
PRATT, W.P., AND OTHERS, 1969, GEOLOGIC MAP OF THE RICO QUADRANGLE, DOLORES AND MONTEZUMA COUNTIES, COLORADO: USGS MAP GQ-797.
CROSS, WHITMAN, AND RANSOME, F.L., 1905, DESCRIPTION OF THE RICO QUADRANGLE: USGS FOLIO 130.
BLM MINERAL SURVEY MS 8758
COLORADO DIV. MINES INF. REPT.
| Subject category | Comment text |
|---|---|
| Deposit | MIDDLE AND UPPER HERMOSA FM LIMESTONES, SANDSTONES, AND SHALES TREND NW-SE, DIP 25 TO 30 NE, AND ARE INTRUDED BY HORNBLENDE LATITE PORPHYRY SILL. IRON VEIN TRENDS N 16 W, 60 TO 85 NE, AND CONSISTS OF 4 TO 10 INCHES OF BANDED QUARTZ ON HANGING WALL FOLLOWED BY DISTURBED QUARTZ AND COUNTRY ROCK, WITH PINKISH MANGANIFEROUS (?) CALCITE AS GANGUE. PRACTICALLY NO ORE FOUND WHERE FAULT TRAVERSES SANDSTONE AND SHALE. LIMESTONE REPLACED OVER 100-FT LENGTH AND 6- TO 12-FT WIDTH WHERE VEIN CUTS MIDDLE HERMOSA FM. ORE ALSO EXTENDS INTO LIMESTONE FOR SOME DISTANCE FROM VEIN ALONG FISSURES DIPPING 40 SW AND COMING TO MAIN VEIN FROM NE. PRESENCE OF EAST-WEST-TRENDING NELLIE BLY FAULT SUGGESTED BY CHANGE IN DIP OF BEDDING AND THIN VEIN OF CRUSHED BANDED QUARTZ. LOWER TUNNEL WORKED DOWNDIP EXTENSION OF LIMESTONE REPLACEMENT ORE, BUT NELLIE BLY FAULT MAY TRUNCATE MINERALIZED BEDS AT DEPTH. |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-SEP-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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