| Deposit ID | 10014134 |
|---|---|
| MRDS ID | D010779 |
| Record type | Site |
| Current site name | Newman Mines |
| Alternate or previous names | Swansea, Klingender, and Chestnut Tunnels, Patented Claims: Swansea, MS 434, Chestnut, MS 435, Newman, MS 436a |
| Related records | 10288038 |
| Geographic coordinates: | -108.02732, 37.68279 (WGS84) |
|---|---|
| Elevation | 2807 |
| Relative position | 0.67 MILES S 21 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 | 36 | S2 | Colorado |
| Commodity | Importance |
|---|---|
| Silver | Primary |
| Lead | Primary |
| Zinc Critical | Primary |
| Copper | Secondary |
| Gold | Secondary |
| Manganese Critical | Tertiary |
| Materials | Type of material |
|---|---|
| Quartz | Gangue |
| Rhodochrosite | Gangue |
| Rhodonite | Gangue |
| 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 > Clastic Sedimentary Rock > Shale |
| Rock unit name | Hermosa Formation |
| Rock description | Hermosa Formation |
| (1) | -108.02732, 37.68279 |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | San Juan Uplift, Paradox Basin |
| Type of structure | Local |
| Structure description | Rico Dome |
| General form | TABULAR |
|---|
| Development status | Past Producer |
|---|---|
| Commodity type | Metallic |
| Deposit size | Small |
| Significant | No |
| Discovery year | 1879 |
| Discoverer | Harry Irving |
| Year of first production | 1879 |
| District name | Pioneer (Rico) District |
|---|
| Ownership category | National Forest |
|---|---|
| Area name | San Juan N. F. |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | D010779 |
MCKNIGHT, E.T., 1974, GEOLOGY AND ORE DEPOSITS OF THE RICO DISTRICT, COLORADO: USGS PROF. PAPER 723, P. 73-75.
PRATT, W.P., AND OTHERS, 1969, GEOLOGIC MAP OF THE RICO QUADRANGLE, DOLORES AND MONTEZUMA COUNTIES, COLORADO: USGS MAP GQ-797.
RANSOME, F.L., 1901, THE ORE DEPOSITS OF THE RICO MOUNTAINS, COLORADO: USGS 22D ANN. REPT., PT. 2, P. 328-334.
CROSS, WHITMAN, AND RANSOME, F.L., 1905, DESCRIPTION OF THE RICO QUADRANGLE: USGS FOLIO 130.
BLM MINERAL SURVEYS MS 434, 435, 436A&B
| Subject category | Comment text |
|---|---|
| Deposit | 75 NW, AND IS SOLID BANDED VEIN 8 INCHES THICK WIDENING IN PLACES TO 2-FT WIDE SHEETED ZONE, PARTLY BRECCIATED AND RECEMENTED AND CONTAINING ORE TO 140 FT BELOW BLANKET. VEIN IS CUT OFF BY NNW-TRENDING CUARTO CROSS VEIN. OFFSET TO NW IS SUPPOSED TO BE KLINGENDER VEIN. CUARTO, PRINCIPAL CROSS VEIN, IS BARREN BUT REPORTEDLY FAULTS BLANKET ORE DEVELOPED OVER IT. BLANKET REPLACEMENT ORES BEST DEVELOPED OVER NW VEINS IN SHALE AND SANDSTONE BRECCIA ABOVE BLANKET OR CONTACT LIMESTONE AND IS OVERLAIN BY SHALE. NE VEINS SHOW DISPLACEMENT WHERE CUT BY SOME NW VEINS BUT NO DISPLACEMENT ACROSS OTHERS. |
| Deposit | LOWER HERMOSA FM SANDSTONE, SHALE, AND LIMESTONE DIP ABOUT 15 SW AND ARE CUT BY MINERALIZED NW-TRENDING FISSURES AND ESSENTIALLY BARREN NW-TRENDING CROSS FISSURES. PRINCIPAL NE-TRENDING VEINS INCLUDE NORTH SWANSEA, SWANSEA, KLINGENDER, NEWMAN, NEWMAN NO. 2 (EQUIVALENT? TO ENTERPRISE), AND CHESTNUT. NE VERTICAL VEINS AVERAGE 6 TO 8 INCHES WIDE WITH SOME WIDER STOPED AREAS, AND CONTAIN BANDED STRUCTURES OFTEN WITH MEDIAL PLANES OF QUARTZ-LINED VUGS. IN CONTRAST TO ENTERPRISE, NEWMAN ORES ARE FOUND FROM JUST BENEATH OVERLYING BLANKET LIMESTONE TO ONLY 70 TO 80 FT BELOW BLANKET, AND ORE IS OXIDIZED WITH RHODOCHROSITE ALTERING TO MN OXIDES AND ARGENTIFEROUS SULFIDES ALTERING PARTLY TO NATIVE AG. CHESTNUT VEIN CONSISTS OF TWO OR MORE PARALLEL VEINS TRENDING NE AND DIPPING 50 TO 70 NW AND CUT BY SEVERAL NW FISSURES. LODE IS PARTLY SHEETED ZONE OF 3 OR 4 STRINGERS EACH UP TO 3 INCHES WIDE SEPARATED BY SLABS OF COUNTRY ROCK, PARTLY OXIDIZED AND CONTAINING NATIVE AG. NEWMAN VEIN TRENDS NE, DIPS |
| 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.
These are landing pages for further research — the state agencies don't currently expose per-mine deep links.