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Contention Mine

Past Producer in Hinsdale county in Colorado, United States with commodities Silver, Gold, Copper, Lead, Zinc, Manganese, Antimony
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Alteration
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Land status
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10014676
MRDS ID D011555
Record type Site
Current site name Contention Mine
Alternate or previous names Patented Claims: Contention, MS 4694, Mayflower, MS 9792
Related records 10288052

Geographic coordinates

Geographic coordinates: -107.29369, 37.98612 (WGS84)
Elevation 2749
Relative position 3.25 MILES S 18 E FROM LAKE CITY

Site location context

Political divisions (FIPS codes)

Hinsdale(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Lake San Cristobal(quadrangle 1:24,000 scale)

Silverton(quadrangle 1:100,000 scale)

Durango(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Gunnison(hydrologic unit)

Gunnison(hydrologic accounting unit)

Gunnison(hydrologic subregion)

Upper Colorado(hydrologic region)

Geographic areas

Country State County
United States Colorado Hinsdale

Public Land Survey System information

Meridian Township Range Section Fraction State
New Mexico 043N 004W 15,16 Colorado

Comments on the location information

  • CONTIGUOUS CLAIMS LIE ACROSS LAKE FORK ABOUT 700 FT NORTH OF NORTH END OF LAKE SAN CRISTOBAL AND EXTEND WEST UP MOUNTAIN SLOPE. ELEV AND LAT-LONG GIVEN ARE FOR PROBABLE LOWER TUNNEL ON MAYFLOWER CLAIM, IN SW SE NW SEC. 15. ; INFO FROM LAND.ST :1977

Commodities

Commodity Importance
Silver Primary
Gold Primary
Copper Secondary
Lead Tertiary
Zinc Critical Tertiary
Manganese Critical Tertiary
Antimony Critical Tertiary

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Silver Ore
Sphalerite Ore
Barite Gangue
Quartz Gangue
Rhodochrosite Gangue

Alteration

  • (Local) Silicification; Supergene Oxidation Of Argentiferous Cu Sulfide To Chalcocite And Native Ag; Sericitization

Analytical data

Result 2500-LB TEST SAMPLE OF PYRITE FROM LOWER ORE CONTAINED 11.34 OZ AG AND 0.28 OZ AU

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Quartz Latite
    Rock unit name Biotite-Quartz Latite Of Burns Member Of Silverton Volcanics
    Rock description Biotite-Quartz Latite Of Burns Member Of Silverton Volcanics
    Stratigraphic age (youngest) Oligocene
    Stratigraphic age (youngest) Oligocene
    Stratigraphic age (youngest) Oligocene
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Quartz Latite

Nearby scientific data

(1) -107.29369, 37.98612
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description San Juan Volcanic Field, San Juan Depression
Type of structure Local
Structure description San Juan-Uncompahgre Calderas, Lake City Caldera

Ore body information

  • Thickness 0.61M

Controls for ore emplacement

  • Ne-Trending Radial Fault/Fracture Related To Lake City Caldera Formation

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Lake (Lake City) District

Land status

Ownership category Private

Comments on the production information

  • PROBABLE PARTIAL PRODUCTION RECORD. FIGURES UNAVAILABLE FOR ANY PRODUCTION BEFORE OR AFTER YEARS CITED ABOVE. ESTIMATED AG FIGURES CALCULATED USING AG PRICES OF $0.94/OZ, $1.05/OZ, $0.99/OZ, AND $0.87/OZ FOR 1889, 1890, 1891, AND 1892, RESPECTIVELY, BASED ON TOTAL REPORTED PRODUCTION (IN OZ) AND REPORTED VALUE FOR HINSDALE COUNTY FOR THOSE YEARS. ESTIMATED AU FIGURES CALCULATED USING AVERAGE AU PRICE OF $20.65/OZ.

Comments on the workings information

  • LOWER TWO TUNNELS (MAYFLOWER CLAIM) DRIVEN GENERALLY WEST OR WSW ON VEIN. UPPER TUNNEL (CONTENTION CLAIM) DRIVEN GENERALLY WEST OR WSW, POSSIBLY CONNECTING WITH BLACK CROOK/ILMA WORKINGS.

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit MINE LOCATED JUST BEYOND NE RIM OF LAKE CITY CALDERA IN MOAT-INFILL SEQUENCE OF UNCOMPAHGRE CALDERA. VEIN FILLS RADIAL FRACTURE OR FAULT WITHIN SLACK'S (1980) BARITE/PRECIOUS METALS ASSEMBLAGE, QUARTZ-SPHALERITE ZONE. VEIN TRENDS N 60 TO 79 E, DIPS NEARLY VERTICAL. IRVING AND BANCROFT (1911) DESCRIBE UPPER ORE AS VERY RICH AG-BEARING TETRAHEDRITE WITH SOME RHODOCHROSITE, AND SOME RICH POCKETS OF NATIVE AG. LOWER WORKINGS SHOW ABUNDANT AU- AND AG-BEARING PYRITE, LESS TETRAHEDRITE, IN DENSE, VUGGY, CHALCEDONIC SILICA CONTAINING NETWORKS OF TABULAR BARITE, FINE-GRAINED NONCRYSTALLINE PYRITE, SPHALERITE, TETRAHEDRITE, AND SUBORDINATE GALENA AND CHALCOPYRITE. SECONDARY CHALCOCITE DEPOSITED ON SURFACES AND IN CRACKS OF PYRITE. DISCONTINUOUS VEIN PINCHES TO NARROW, SILICIFIED, SLIGHTLY PYRITIZED SHEETED ZONE WITH INTERVENING ORE IN SHOOTS.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1984 Schwochow, Stephen D. Colorado Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site

Authoritative Colorado resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.