Decatur West District

Past Producer in Conejos county in Colorado, United States with commodities Gold, Silver, Zinc, Antimony, Tin, Molybdenum, Lead, Copper, Aluminum
Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Alteration
  7. Mineral occurrence model information
  8. Nearby scientific data
  9. Geologic structures
  10. Controls for ore emplacement
  11. Economic information about the deposit and operations
  12. Mining district
  13. Ownership information
  14. Bibliographic references

Geologic information

Identification information

Deposit ID 60000373
MRDS ID D010635
Record type District
Current site name Decatur West District
Alternate or previous names Stunner District

Geographic coordinates

Geographic coordinates: -106.5925, 37.38942 (WGS84)
Relative position DISTRICT LOCATED ALONG ALAMOSA RIVER 3 MILES NW OF PLATORO, FROM ELEPHANT MTN ON NE TO SHEEPSHEAD-PROSPECT MTN ON SW NORTH OF RIVER, AND FROM TELLURIDE MTN-LILY POND ON NE TO ABOUT GILMORE ON SW SOUTH OF RIVER. INCLUDES DRAINAGES OF BITTER CREEK, ALUM CREEK, LOWER IRON CREEK, ASIATIC CREEK, LOWER GLOBE CREEK, AND EURYDICE CREEK. DISTRICT ACCESSIBLE BY ROAD UP ALAMOSA RIVER FROM CAPULIN THROUGH JASPER, BY TRAIL DOWN WIGHTMAN FORK FROM SUMMITVILLE, BY ROAD OVER STUNNER PASS NW FROM PLATORO, AND BY TRAIL AND ROAD SE OVER ELWOOD PASS. DISTRICT ALSO EXTENDS ONTO PLATORO QUAD. ELEV AND LAT-LONG GIVEN ARE FOR CENTRALLY LOCATED LOOKOUT MTN (NE SW SEC. 06, T36N, R3E). ; INFO FROM LAND.ST :(1975)

Site location context

Political divisions (FIPS codes)

Conejos(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Summitville(quadrangle 1:24,000 scale)

Antonito(quadrangle 1:100,000 scale)

Durango(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Alamosa-Trinchera(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)

Geographic areas

Country State County
United States Colorado Conejos

Commodities

Commodity Importance
Gold Primary
Silver Primary
Zinc Critical Tertiary
Antimony Critical Tertiary
Tin Critical Tertiary
Molybdenum Tertiary
Lead Tertiary
Copper Tertiary
Aluminum Critical Tertiary

Alteration

  • (Local) SOLFATARIC
  • (Local) PROPYLITIC
  • (Local) ARGILLIC
  • (Local) POTASSIC

Mineral occurrence model information

Model code 154
USGS model code 25e
Deposit model name Epithermal quartz-alunite Au
Mark3 model number 38

Nearby scientific data

(1) -106.5925, 37.38942

Economic information

Geologic structures

Type of structure Local
Structure description PLATORO CALDERA, SUMMITVILLE CALDERA, ALAMOSA RIVER STOCK, PLATORO FAULT ZONE, SUMMITVILLE FAULT
Type of structure Regional
Structure description SAN JUAN VOLCANIC FIELD

Controls for ore emplacement

  • DISSEMINATED MINERALIZATION IN ZONED HYDROTHERMAL ALTERATION AROUND ALUM CREEK PORPHYRY INTRUDING POST-SUMMITVILLE-COLLAPSE RING-FAULT INTRUSION (ALAMOSA RIVER STOCK) AND ZONED SOLFATARIC ALTERATION AROUND VENT-DOME COMPLEXES; QUARTZ VEIN DEPOSITION IN POST-INTRUSION EXTENSIONAL FAULTING IN PLATORO FAULT ZONE AND SUMMITVILLE FAULT

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Discovery year 1870
Year of first production 1870
Year of last production 1938

Mining district

District name DECATUR WEST DISTRICT
District name STUNNER DISTRICT

Ownership information

  • Type Owner
    Owner GEORGE L. AND KATHERINE T. PATTERSON
    Home office NEW YORK CITY
    Year 1938
  • Type Operator
    Owner STUNNER MINES, INC.
    Home office MONTE VISTA
    Year 1938

Reference information

Bibliographic references

Beyond USGS

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

Authoritative Colorado resources

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