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Bonanza Mine

Past Producer in Saguache county in Colorado, United States with commodities Lead, Copper, Silver, Zinc, Gold, Manganese, Titanium, Metal
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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. Ownership information
  18. Links to other databases
  19. Bibliographic references
  20. General comments
  21. Reporter information

Geologic information

Identification information

Deposit ID 10012564
MRDS ID D008246
Record type Site
Current site name Bonanza Mine
Alternate or previous names Bonanza, Bonanza No. 1, Cornucopia Claims
Related records 10240261

Geographic coordinates

Geographic coordinates: -106.14949, 38.31279 (WGS84)
Elevation 3252
Relative position 15.5 MILES N 01W FROM SAGUACHE

Site location context

Political divisions (FIPS codes)

Saguache(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Bonanza(quadrangle 1:24,000 scale)

Saguache(quadrangle 1:100,000 scale)

Montrose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

San Luis(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 Saguache

Public Land Survey System information

Meridian Township Range Section Fraction State
New Mexico 047N 007E 24 NE OF NE OF SW Colorado

Comments on the location information

  • S-T-R, LAT-LONG, AND ELEV. TAKEN FROM BURBANK'S (1932) PLATE 1 (SCALE 1:12000). MINE OR CLAIM LIES ALONG KERBER CR. ABOVE CONFLUENCE WITH SQUIRREL CR. ; INFO FROM LAND.ST :(1976)

Commodities

Commodity Importance
Lead Primary
Copper Primary
Silver Primary
Zinc Critical Primary
Gold Secondary
Manganese Critical Tertiary
Titanium, Metal Critical Tertiary

Comments on the commodity information

  • SECONDARY OXIDIZED ORES INCLUDE CERUSSITE, ANGLESITE, COVELLITE

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Pyrite Ore
Sphalerite Ore
Stromeyerite Ore
Tennantite Ore
Anatase Gangue
Apatite Gangue
Barite Gangue
Fluorite Gangue
Limonite Gangue
Quartz Gangue
Rhodochrosite Gangue
Rhodonite Gangue
Rutile Gangue

Alteration

  • (Local) Early Barren Stage Of Alteration By Fumarolic Or Acid-Hot Spring Activity Resulted In Intense Silicification, Wallrock Replacement By Jasper And Alteration Products Hematite, Diaspore, Alunite, Barite, Zunyite, Rutile, And Kaolin Minerals. Later Mineralizing Stage By Alkaline Or Neutral Solutions Deposited Ore And Gangue And Caused Micaceous Alteration (Sericite And Chlorite) And Calcite, Quartz, And Pyrite.

Analytical data

Result ORE ANALYSES FROM VARIOUS LEVELS. EACH SET OF VALUES IS OZ/TON AG, % PB, % ZN: BETW. 200 AND 300 LEVELS SOUTH OF SHAFT, 1.50, 3.1, 4.75
Result 350 LEVEL SOUTH OF SHAFT, 2.50, 5.4, 3.85
Result BETW. 350 AND 400 LEVELS SOUTH OF SHAFT, 1.12, 11.6, 9.60
Result BETW. 300 AND 400 LEVELS NORTH OF SHAFT, 4.40, 7.1, 14.10
Result BETW. 400 AND 500 LEVELS NORTH OF SHAFT, 3.40, 2.6, 7.10
Result ABOVE 400 LEVEL NW OF SHAFT, 10.60, 7.3, 14.93
Result BETW. 300 AND 400 LEVELS NORTH OF SHAFT (ON VEIN IN BONANZA HANGING WALL), 2.50, 5.9, 10.50
Result ON 300 LEVEL IN SHAFT ON COCOMONGO FOOTWALL, 2.00, 3.7, 7.50
Result BETW. 400 AND 500 LEVELS SOUTH OF SHAFT, 1.30, 4.4, 9.90
Result ON WINZE BETW. 350 AND 500 LEVELS SOUTH OF SHAFT, 2.40, 12.5, 13.80.

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Latite
    Rock unit name Bonanza Tuff;Rawley Andesite
    Rock description Bonanza Tuff;Rawley Andesite
    Stratigraphic age (youngest) Oligocene
    Stratigraphic age (youngest) Oligocene
  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Latite
    Rock unit name Bonanza Tuff;Rawley Andesite
    Rock description Bonanza Tuff;Rawley Andesite
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite

Nearby scientific data

(1) -106.14949, 38.31279
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Bonanza Caldera
Type of structure Regional
Structure description Sawatch Range, San Juan Volcanic Field, Rio Grande Rift

Ore body information

  • Width 3.66M

Controls for ore emplacement

  • See Comments

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Significant No
Discovery year 1880
Year of first production 1883
Year of last production 1954

Mining district

District name Bonanza (Kerber Creek)

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner Bonanza Consolidated Mining Co.
    Home office Salida, Co.
    First year 1955
  • Type Owner
    Owner Stanley Blunt
    Home office Canon City, Co.
    First year 1966

Comments on the workings information

  • MINE DEVELOPED BY 450-FT-DEEP INCLINED SHAFT ON BEARING OF N40E. SIX LEVELS DRIVEN AT 105, 150, 200, 300, 350, 400, AND 500 FT DEPTHS. MOST SIGNIFICANT DEVELOPMENT HAS BEEN ON LOWER FIVE LEVELS. MAJOR STOPES ARE ABOVE 200 LEVEL EAST OF SHAFT, ABOVE 300 LEVEL NORTH OF SHAFT, ABOVE 350 LEVEL NE OF SHAFT. EXTENT OF DRIFTING AS FOLLOWS: 105 LEVEL, 250 FT; 150 LEVEL, 200 FT; 200 LEVEL, 430 FT; 300 LEVEL, 2130 FT; 350 LEVEL, 860 FT; 400 LEVEL, 1900 FT; 500 LEVEL, 1130 FT. FIGURES FOR 200,300, AND 400 LEVELS INCLUDE COCOMONGO WORKINGS. CORNUCOPIA INCLINED SHAFT LIES 200 FT N73E FROM BONANZA SHAFT, IS DRIVEN AT BEARING OF S85E, AND INTERSECTS RAISE DRIVEN FROM 500 TO 350 LEVELS.

Comments on development

  • CLAIMS LOCATED 1880, FIRST PRODUCTION APPARENTLY 1883, BUT NO APPARENT PRODUCTION IN 1887, 1888, 1889 AND 1891. AFTER 1917 AND DEVELOPMENT OF COCOMONGO PROPERTY, BONANZA AND COCOMONGO WORKINGS AND PRODUCTION WERE CONSOLIDATED AND REPORTED TOGETHER. MINE WAS INACTIVE AFTER 1926 EXCEPT FOR SPORADIC PRODUCTION IN 1943 AND 1954. IN 1966 COTTER CORP. LEASED THE PROPERTY FOR EXPLORATION BUT CLOSED IT DOWN THE SAME YEAR.

Reference information

Bibliographic references

  • Deposit

    PATTON, H.B., 1916, GEOLOGY AND ORE DEPOSITS OF THE BONANZA DISTRICT, SAGUACHE COUNTY, COLORADO: COLORADO GEOLOGICAL SURVEY BULL. 9, 136 P.

  • Deposit

    BURBANK, W.S., 1932, GEOLOGY AND ORE DEPOSITS OF THE BONANZA MINING DISTRICT, COLORADO: USGS PROF. PAPER 169, 166 P.

  • Production

    BURBANK (1932), AS COMPILED FROM USGS AND USBM RECORDS; COLO. DIV.MINES ANN. OPERATORS REPTS

General comments

Subject category Comment text
Deposit FRACTURE CONTAINING BONANZA VEIN APPEARS TO BE A MORE NORTHWESTERLY STRIKING AND MORE STEEPLY DIPPING HANGING WALL FRACTURE OF THE COCOMONGO VEIN. ITS JUNCTION WITH COCOMONGO VEIN ON 500 LEVEL IS ZONE OF COMPOUND VERTICAL FRACTURES, NOT A CLEARCUT INTERSECTION. ON SOUTHEASTERNMOST 350 LEVEL DRIFT, BONANZA VEIN BECOMES TIGHT, IRREGULARLY MINERALIZED, AND SPLITS INTO SEVERAL STEEPER FRACTURES. IN RAISE ABOVE 350 LEVEL, PB-ZN ORE OCCURS PARTLY AS CEMENT BETWEEN FRAGMENTAL MATERIAL IN FISSURE, BUT VEIN MATTER COATS FRACTURE WALLS NEAR INTERSECTION WITH COCOMONGO VEIN.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-DEC-1981 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.