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Boss Mine

Past Producer in Summit county in Colorado, United States with commodities Silver, Gold, Lead, Zinc, Copper
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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. Economic information about the deposit and operations
  15. Mining district
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10021669
MRDS ID DE00807
Record type Site
Current site name Boss Mine
Alternate or previous names Boss-Thunderbolt group
Related records 10240393

Geographic coordinates

Geographic coordinates: -106.19644, 39.69638 (WGS84)
Location accuracy 10(meters)

Site location context

Political divisions (FIPS codes)

Summit(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Willow Lakes(quadrangle 1:24,000 scale)

Vail(quadrangle 1:100,000 scale)

Leadville(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Blue(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)

Eagles Nest Wilderness(Wilderness)

Wilderness FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Colorado Summit

Public Land Survey System information

Meridian Township Range Section Fraction State
004S 079W 23 Colorado

Comments on the location information

  • North side of North Rock Creek, near the common corner of secs. 13, 14, 23, and 24, T 4 S, R 79 W, about 8 miles NW of Silverthorne.

Commodities

Commodity Importance
Silver Primary
Gold Secondary
Lead Secondary
Zinc Critical Secondary
Copper Secondary

Materials information

Materials Type of material
Argentite Ore
Chalcopyrite Ore
Galena Ore
Sphalerite Ore
Hematite Gangue
Quartz Gangue
Siderite Gangue

Alteration

  • (Local) Silicified and chloritized granite with hematite stain

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Granitoid
    Stratigraphic age (youngest) Paleoproterozoic

Nearby scientific data

(1) -106.19644, 39.69638
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description frontal fault zone

Ore body information

  • Strike NW
    Dip 45 NE TO VERTICAL
    Thickness 3.66M

Comments on the geologic information

  • Several veins follow fractures in the frontal fault zone, trend NNW and dip from 40 degrees east to near vertical; they are quartz veins with streaks of sulfide ore minerals.
  • Boss vein strikes N12W and dips 40 NE (average). Vein width averages 3.5 ft, but mineralized material generally much narrower. Thunderbolt vein strikes N05W and dips about 35 NE. Averages about 5.0 ft in width, but mineralized portions of the vein are narrower. Several other veins are present, and ore shoots are commonly localized at vein intersections.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Significant No
Production years 1882-1897, 1901-1963

Mining district

District name North Rock Creek Area (Wilkinson Mining District)

Comments on the production information

  • About $222,000 of high-grade silver ore was produced from 1882-1897; a small amount has been produced since then.

Comments on the reserve resource information

  • Mine dumps and old stopes may contain lower grade material that could be concentrated and processed. Maximum tonnage estimated to be 60,000 tons.

Workings at the site

  • Type of workings Underground
    Area 0.526HA

Comments on the workings information

  • The mine is developed on at least five levels by 6,000 feet of workings.

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit FISSURE VEINS IN PORPHYRY

Reporter information

Type Date Name Affiliation Comment
Reporter 01-APR-1991 Wilson, Anna B. U.S. Geological Survey
Updater 18-JAN-2006 Beach, Richard A. 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.