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Boulder-Buffalo

Past Producer in Custer county in Colorado, United States with commodities Silver, Manganese, Iron
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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. Mineral occurrence model information
  10. Host and associated rocks
  11. Nearby scientific data
  12. Geologic structures
  13. Ore body information
  14. Controls for ore emplacement
  15. Economic information about the deposit and operations
  16. Mining district
  17. Land status
  18. Workings at the site
  19. Links to other databases
  20. Bibliographic references
  21. Reporter information

Geologic information

Identification information

Deposit ID 10012287
MRDS ID D007838
Record type Site
Current site name Boulder-Buffalo
Alternate or previous names Boulder Mine

Geographic coordinates

Point of reference Pit
Geographic coordinates: -105.4389, 38.14057 (WGS84)
Elevation 2454
Relative position at trench; 0.5 MILES N 21 E FROM THE JUNCTION OF SR 96 AND CR 277 IN SILVER CLIFF, CO.

Site location context

Political divisions (FIPS codes)

Custer(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Westcliffe(quadrangle 1:24,000 scale)

Canon City(quadrangle 1:100,000 scale)

Pueblo(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Arkansas Headwaters(hydrologic unit)

Upper Arkansas(hydrologic accounting unit)

Upper Arkansas(hydrologic subregion)

Arkansas-White-Red(hydrologic region)

Federal lands

Bureau of Land Management(Bureau of Land Management CO)

Bureau of Land Management CO BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States Colorado Custer

Public Land Survey System information

Meridian Township Range Section Fraction State
6th Principal 022S 072W 16 SW OF NW OF NE Colorado

Comments on the location information

  • NE OF GEYSER MINE NORTH OF UNNAMED TRIBUTARY TO CHLORIDE GULCH ; INFO FROM LAND.ST :(1976)

Commodities

Commodity Importance
Silver Primary
Manganese Critical Secondary
Iron Secondary

Materials information

Materials Type of material
Cerargyrite Ore
Ocher Ore
Psilomelane Ore
Kaolin Gangue

Alteration

  • (Local) argillic

Mineral occurrence model information

Model code 82
USGS model code 22
Deposit model name Epithermal veins

Host and associated rocks

  • Host or associated Associated
    Rock type Unconsolidated Deposit > Clay, Mud
    Stratigraphic age (youngest) Oligocene
    Stratigraphic age (youngest) Oligocene
    Stratigraphic age (youngest) Miocene
  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite
    Rock unit name Silver Cliff Rhyolite Unit 2
    Rock description Silver Cliff Rhyolite Unit 2
  • Host or associated Host
    Rock type Unconsolidated Deposit > Clay, Mud
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic)
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite

Nearby scientific data

Pit (1) -105.4389, 38.14057
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Silver Cliff Volcanic Center, Wet Mtns, Wet Mtn Valley
Type of structure Local
Structure description Large Nw-Trending Fault

Ore body information

  • Dip 15 NORTH
    Length 30.48M

Controls for ore emplacement

  • supergene zone of fractured controlled veins along ring fracture

Comments on the geologic information

  • ORE OCCURS IN CONCENTRIC SHELLS SURROUNDING SPHERULITES IN PARTLY DECOMPOSED ZONE

Economic information about the deposit and operations

Operation type Surface
Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1895

Mining district

District name Silver Cliff

Land status

Ownership category BLM Administrative Area

Workings at the site

  • Type of workings Surface
    Length 30.48M
    Overall length 30.48M

Comments on the workings information

  • SEVERAL CUTS

Comments on development

  • THE BOULDER AND BUFFALO HUNTER MILL WAS ERECTED TO TREAT ORES FROM BOTH MINES

Reference information

Bibliographic references

  • Deposit

    CROSS, WHITMAN, 1896, GEOLOGY OF SILVER CLIFF AND THE ROSITA HILLS, COLORADO: USGS 17TH ANN. REPORT, PT 2, P. 263-403.

  • Deposit

    EMMONS, S.F., 1896, THE MINES OF CUSTER COUNTY, COLORADO: USGS 17TH ANN. REPORT, PT 2, P. 405-472.

  • Deposit

    SHARP, W.M., 1978, GEOLOGIC MAP OF THE SILVER CLIFF AND ROSITA VOLCANIC CENTERS, CUSTER COUNTY, COLORADO: USGS MAP I-1081.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1981 Collins, Donna B. 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.