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Buena Mine

Past Producer in Boulder county in Colorado, United States with commodities Gold, Silver, Copper, Tungsten, Fluorine-Fluorite
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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. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Ownership information
  17. Workings at the site
  18. Links to other databases
  19. Bibliographic references
  20. General comments
  21. Reporter information

Geologic information

Identification information

Deposit ID 10017417
MRDS ID DC03450
MAS/MILS ID 80130153
Record type Site
Current site name Buena Mine
Alternate or previous names Bueno Mine, Buena, Buena Group, Bueno
Related records 10214216

Comments on the site identification

  • Seems that Buena is the same as Bueno. Because this record for Bueno (only spelled Bueno in ColoMetalMining, 1960) contains comments with quoteed material about the mine clearly labeled Buena in PP-223 (p. 265-269).
  • Unclear if the Buena Mine is the same as the Bueno Mine. The former is in the center of the W2 of Sec. 24. The latter is listed as being in the SE4 of Sec. 24 (Colorado Metal Mining Fund Board, 1960, Tungsten in Colorado, p. 18).
  • Buena Mine appears to include the Wano Group (p. 269, PP-223). Original MAS record 0080130841 (=newMRDS 10166242) for Wano Group has been deleted. It was a very minimal record.

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -105.40682, 40.11877 (WGS84)
Location accuracy 250(meters)
Relative position SW 1/4. 2000 FT. E. OF TOP OF BUENA (Bueno?) MT. AND ABOUT A MILE N 70 W OF JAMESTOWN. On south side of a steep gulch. Workings range in altitude from 7,500 to 8,050 ft. Probably one or more of the unidentified workings on ths ourth side of the gulch near where the old road ends on the topo map. Location from PP-223, pl. 3.

Site location context

Political divisions (FIPS codes)

Boulder(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Gold Hill(quadrangle 1:24,000 scale)

Estes Park(quadrangle 1:100,000 scale)

Greeley(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

St. Vrain(hydrologic unit)

South Platte(hydrologic accounting unit)

South Platte(hydrologic subregion)

Missouri(hydrologic region)

Federal lands

Arapaho and Roosevelt National Forests(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Colorado Boulder

Public Land Survey System information

Meridian Township Range Section Fraction State
6th Principal 02N 72W 24 Colorado

Comments on the location information

  • Sec. 24, T2N, R 72W, about 1 mile NW of Jamestown.
  • ColoMetalMining, 1960, p. 18 gives location as SE4 of sec. 24, but pl. 3 of PP-223 shows mine in C of W2 Sec. 24. This may be part of the reason it is unclear if Buena = Bueno.

Commodities

Commodity Importance
Gold Primary
Silver Primary
Copper Secondary
Tungsten Critical Secondary
Fluorine-Fluorite Critical Tertiary

Comments on the commodity information

  • Considerable fluorite in places, may be recoverable.

Materials information

Materials Type of material
Krennerite Ore
Gold Ore
Sylvanite Ore
Petzite Ore
Fluorite Gangue
Pyrite Gangue
Quartz Gangue

Alteration

  • (Local) silicified or sericitized wall rock

Mineral occurrence model information

Model code 84
USGS model code 22b
Deposit model name Alkaline Au-Te (Au-Ag-Te veins)
Mark3 model number 80

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Granitoid
    Rock unit name Silver Plume Granite
    Stratigraphic age (youngest) Neoproterozoic

Nearby scientific data

Main Entrance (1) -105.40682, 40.11877
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description pipe-like stockworks at vein interections and along veins

Controls for ore emplacement

  • Intersection Of Fissures And Schist Granite Contact.

Comments on the geologic information

  • Six major and several minor veins are exposed; important ore veins strike NE and dip steeply NW. Large pipe-like orebodies occur at vein intersections.

Economic information about the deposit and operations

Operation type Underground
Development status Past Producer
Commodity type Both
Significant No

Mining district

District name Jamestown District

Ownership information

  • Type Owner
    Owner Harry M. Williiamson, & Son
    Year 1960
  • Type Operator
    Owner Ray Imel
    Year 1960
  • Type Owner-Operator
    Owner BUENO COUER DALENE
    Year 1977

Comments on the ownership information

  • BUENO COUER DALENE is probably a very bad misspelling of BUENO COEUR D'ALENE.

Comments on the production information

  • The most productive gold mine in the district, the Bueno is credited with $2,000,000 from 1879 to 1943, mostly in gold. Additional exploration and mining during the 1960s, 70s, and 80s probably resulted in limited gold production. The mine has seven levels, from 7500 to 8050 feet in elevation.
  • Produced 3 or 4 units of WO3.

Comments on the reserve resource information

  • Sunshine Mining Co. files (Boulder County - Jamestown Project) contain several reports, dated from 1930 to 1992, that describe the Bueno mine workings, geology, and facilities, and include results of drilling and sample assays, discussions of ore reserves, and exploration targets. In 1992 Sunshine declined to do additional work.

Workings at the site

  • Type of workings Underground

Comments on the workings information

  • Shaft with many levels. Adits above shaft collar (ColoMetalMining, 1960, p. 18)

Reference information

Bibliographic references

  • Deposit

    STATE OF COLO. METAL MINING FUND BOARD, 1960, TUNGSTEN MINES OF COLO.

  • Deposit

    CONSV. DIV. COMP. DATE, 1,62

  • Deposit

    Lovering, T. S., and Goddard, E. N., 1950, Geology and ore deposits of the Front Range, Colorado: U.S. Geological Survey Professional Paper 223, 319 p.

  • Deposit

    Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.

  • Deposit

    Vanderwilt, J.W., 1947, Mineral resources of Colorado: State of Colorado Mineral Resources Board, 547 p.

  • Deposit

    COLO BOM 1963 LIST [for Wano Group]

General comments

Subject category Comment text
Deposit GOLD MINE. TUNGSTEN OCCURED IN ONE POCKET ONLY, ON THE 3RD LEVEL (ColoMetalMining, 1960, p. 18)

Reporter information

Type Date Name Affiliation Comment
Reporter 1973-03-01 Conservation Division Files U.S. Geological Survey also DC03449 = 10017416
Updater 1974-01-01 Unknown U.S. Geological Survey
Updater 2005-12-09 Beach, Richard A. Colorado Geological Survey
Editor 2014-01-27 Wilson, Anna B U.S. Geological Survey merged and deleted duplicate records. Uncertain if Buena is the same mine as Bueno.
Reporter 1983-11-17 Intermountain Field Operations Center (IFOC) U.S. Bureau of Mines MAS 0080130153 = 10214216, 0080130841 = 10166242

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.