| Deposit ID | 10014157 |
|---|---|
| MRDS ID | D010808 |
| MAS/MILS ID | 0080830022 |
| Record type | Site |
| Current site name | Century Mine |
| Alternate or previous names | Patented Claim: Century, MS 1097.5, Century vein |
| Geographic coordinates: | -108.06292, 37.44811 (WGS84) |
|---|---|
| Elevation | 3420 |
| Location accuracy | 100(meters) |
| Relative position | 15.4 MILES N 42 W FROM DURANGO, Approx. location on PP-219, pl. 1, #12. Used MAS location 0080830022. |
Political divisions (FIPS codes)
Montezuma(county)
Colorado(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
La Plata(quadrangle 1:24,000 scale)
Cortez(quadrangle 1:100,000 scale)
Cortez(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Middle San Juan(hydrologic unit)
Upper San Juan(hydrologic accounting unit)
San Juan(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 | Montezuma |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| New Mexico | 037N | 011W | 22 | SW | Colorado |
| Commodity | Importance |
|---|---|
| Gold | Primary |
| Silver | Primary |
| Materials | Type of material |
|---|---|
| Barite | Gangue |
| Quartz | Gangue |
| Result | ECKEL AND OTHERS' (1949) ANALYSES: SAMPLE 421 (LOWER DUMP), 0.02 OZ/TON AU AND 0.01 OZ/TON AG |
|---|---|
| Result | SAMPLE 423 (ORE PILE ON UPPER DUMP), 0.74 0Z/TON AU AND 0.40 OZ/TON AG |
| Result | SAMPLE 424 (SMALL ORE PILE NEAR UPPER DUMP, 0.24 OZ/TON AU AND 0.72 OZ/TON AG. OTHER VEIN SAMPLES IN CENTURY MINE AREA CONTAINED 0.01 TO 0.08 OZ/TON AU WITH HIGH OF 0.25 OZ/TON, AND TRACE TO 0.99 OZ/TON AG WITH HIGHS OF 1.74 AND 4.19 OZ/TON AG. |
| Model code | 85 |
|---|---|
| USGS model code | 22c |
| Deposit model name | Polymetallic veins |
| Mark3 model number | 46 |
| Host or associated | Associated | ||||||
|---|---|---|---|---|---|---|---|
| Rock type | Plutonic Rock > Granitoid > Monzonite | ||||||
| |||||||
| Host or associated | Associated |
|---|---|
| Rock type | Plutonic Rock > Mafic Intrusive Rock > Diorite |
| Rock unit name | Porphyritic Rocks--Diorite-Monzonite Porphyry;Nonporphyritic Rocks--Monzonite |
| Rock description | Porphyritic Rocks--Diorite-Monzonite Porphyry;Nonporphyritic Rocks--Monzonite |
| Host or associated | Host |
|---|---|
| Rock type | Sedimentary Rock > Clastic Sedimentary Rock > Sandstone |
| Rock unit name | Junction Creek Sandstone |
| Rock description | Junction Creek Sandstone |
| (1) | -108.06292, 37.44811 |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | San Juan Uplift, Four Corners Platform |
| Type of structure | Local |
| Structure description | La Plata Dome, Spiller Peak-Mt Moss Stock |
| Thickness | 1.52M |
|---|
| Operation type | Underground |
|---|---|
| Development status | Past Producer |
| Commodity type | Metallic |
| Deposit size | Small |
| Significant | No |
| Discovery year | 1882 |
| Discoverer | James P. Wallace (Claimant) |
| Year of last production | 1896 |
| District name | La Plata (California) District |
|---|
| Ownership category | National Forest |
|---|---|
| Area name | San Juan N. F. |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | D010808 | |
| U.S. Bureau of Mines | Minerals Availability System | MAS | 0080670052 | |
| U.S. Bureau of Mines | Minerals Availability System | MAS | 0080830022 | MAS assigned mine to wrong county (La Plata, not Montezuma) |
ECKEL, E.B., AND OTHERS, 1949, GEOLOGY AND ORE DEPOSITS OF THE LA PLATA DISTRICT, COLORADO: USGS PROF. PAPER P. 67-68, 99-101.
BLM MINERAL SURVEY MS 1097.5
| Subject category | Comment text |
|---|---|
| Deposit | COUNTRY ROCK CONSISTS OF GENERALLY UNMETAMORPHOSED DOLORES FM AND OTHER METAMORPHOSED JURASSIC SEDIMENTARY ROCKS INTRUDED BY DIORITE-MONZONITE PORPHYRY SILL AND APPENDAGE OF SPILLER PEAK-MT MOSS MONZONITE STOCK. SHALY BEDS SILICIFIED OR ALTERED TO HORNFELS; SANDSTONE SILICIFIED TO QUARTZITE. CENTURY VEIN TRENDS N 70 TO 80 E, DIPS 85 SE, AND IS STROnGEST IN JUNCTION CREEK SANDSTONE, TRACEABLE DOWN INTO ENTRADA SANDSTONE, BUT STOPS ABRUPTLY AT SHALE LAYER IN OVERLYING MORRISON FM. IN LOWER ADIT, VEIN IS 2- TO 5-FT-WIDE ZONE OF STRONGLY BRECCIATED QUARTZITE WITH QUARTZ AS BRECCIA-FRAGMENT CEMENT AND AS FILMS AND VEINLETS; PYRITE WIDELY BUT SPARINGLY DISTRIBUTED; VEIN WALLS SHARPLY DEFINED AND VERTICALLY SLICKENSIDED. |
| Deposit | Changed district name from California (La Plata) to La Plata (California) to eliminate confusion with other California districts. Prof. Paper 219 calls this area La Plata District. |
| Deposit | Comment from old, now deleted, record # 10263965: "northeast-trending subparalllel qtz vein hosted in silicified Junction Creek Sandstone" |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-AUG-83 | Schwochow, Stephen D. | Colorado Geological Survey | |
| Reporter | 28-MAY-92 | Intermountain Field Operations Center | U.S. Bureau of Mines | |
| Reporter | 17-NOV-83 | Intermountain Field Operations Center | U.S. Bureau of Mines | |
| Editor | 25-JUN-08 | Wilson, Anna B. | U.S. Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.
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