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Best Friend Mine

Past Producer in Pitkin county in Colorado, United States with commodities Silver, Lead, Zinc, Manganese
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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 10013238
MRDS ID D009426
Record type Site
Current site name Best Friend Mine
Alternate or previous names Claim: Best Friend
Related records 10240328

Geographic coordinates

Geographic coordinates: -106.82562, 39.16999 (WGS84)
Elevation 3048
Relative position 1.3 MILES S 17 W FROM ASPEN

Site location context

Political divisions (FIPS codes)

Pitkin(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Aspen(quadrangle 1:24,000 scale)

Leadville(quadrangle 1:100,000 scale)

Leadville(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Roaring Fork(hydrologic unit)

Colorado Headwaters(hydrologic accounting unit)

Colorado Headwaters(hydrologic subregion)

Upper Colorado(hydrologic region)

Federal lands

White River 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 Pitkin

Public Land Survey System information

Meridian Township Range Section Fraction State
6th Principal 010S 085W 24 NE Colorado

Comments on the location information

  • IN UPPER ASPEN MTN AREA WEST OF SPAR GULCH APPROX 800 FT SW OF LITTLE PERCY MINE. ELEV AND LAT-LONG APPROXIMATED FROM BRYANT (1972) ; INFO FROM LAND.ST :(1980)

Commodities

Commodity Importance
Silver Primary
Lead Primary
Zinc Critical Secondary
Manganese Critical Tertiary

Materials information

Materials Type of material
Barite Gangue

Alteration

  • (Local) Dolomitization

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
    Rock unit name Aplite Porphyry
    Rock description Aplite Porphyry
    Stratigraphic age (youngest) Paleocene
    Stratigraphic age (youngest) Mississippian
    Stratigraphic age (youngest) Paleocene
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Dolomite
    Rock unit name Leadville Limestone (Redcliff And Castle Butte Members);Belden Formation
    Rock description Leadville Limestone (Redcliff And Castle Butte Mbrs);Belden Formation

Economic information

Geologic structures

Type of structure Regional
Structure description Sawatch Uplift, Central Colorado Trough, Piceance Basin, White River Uplift, Elk Uplift
Type of structure Local
Structure description Silver Fault, Contact Fault, Aspen Mountain Syncline, Tourtellotte Park Uplift, Hallet Fault, Dixon Fault

Ore body information

  • Thickness 0.61M

Controls for ore emplacement

  • Bedding Plane Faults; Paleokarst; Geologically Recent Solution Activity (?)

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1885
Discoverer Margaret Cowenhoven And Others (Claimants)

Mining district

District name Aspen (Roaring Fork) District

Land status

Ownership category Private

Comments on the workings information

  • ONE SHAFT (OR INCLINE) WITH SEVERAL LEVELS INTERCONNECTED BY INCLINES (OR WINZES). WORKINGS CONNECT ON EAST WITH BOB INGERSOLL MINE

Reference information

Bibliographic references

  • Deposit

    SPURR, J.E., 1898, GEOLOGY OF THE ASPEN DISTRICT, COLORADO: USGS MON. 31, P. 169-170

  • Deposit

    BRYANT, BRUCE, 1971, GEOLOGIC MAP OF THE ASPEN QUADRANGLE, PITKIN COUNTY, COLORADO: USGS MAP GQ-933.

  • Deposit

    BRYANT, BRUCE, 1972, MAP SHOWING MINES, PROSPECTS, AND AREAS OF SIGNIFICANT SILVER, LEAD, AND ZINC PRODUCTION IN THE ASPEN QUADRANGLE, PITKIN COUNTY, COLORADO: USGS MAP I-785-D

  • Deposit

    BLM MINERAL SURVEY MS 4049

General comments

Subject category Comment text
Deposit MINE DEVELOPED ON CONTACT FAULT, MARKED BY BRECCIATED ZONE AND STRATIFIED LIME MUD LAYER. FAULT BLOCK BOUNDED ON NORTH BY HALLET FAULT AND ON SOUTH BY DIXON FAULT, BOTH LATE EAST-WEST-TRENDING CROSS-FAULTS. MUD APPARENTLY FILLS SOLUTION FEATURES IN DOLOMITE AND BRECCIA ZONE AND HEAVILY STAINED IN LOWER PART BY MN OXIDE MATERIAL CONTAINING 45.86 % MNO2, 12.83 % FE OXIDES AND SOME AG. FOLLOWING MINERALIZATION AND LATE DOLOMITIZATION, LATER MOVEMENT REOPENED FAULT AND ALLOWED CLAY TO FILL AND BOG MN TO FORM.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-SEP-1982 Schwochow, Stephen D. Colorado Geological Survey

Beyond USGS

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

External references

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.