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St. Louis Mine

Past Producer in Saguache county in Colorado, United States with commodities Silver, Lead, Copper, Gold, 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. Ownership information
  18. Production statistics
  19. Workings at the site
  20. Links to other databases
  21. Bibliographic references
  22. General comments
  23. Reporter information

Geologic information

Identification information

Deposit ID 10012565
MRDS ID D008247
Record type Site
Current site name St. Louis Mine
Related records 10167535

Geographic coordinates

Geographic coordinates: -106.12949, 38.30195 (WGS84)
Elevation 3062
Relative position 14.9 MILES N 03E 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 008E 30 NE OF SE OF NW 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 COPPER GULCH 0.9 MILE NE OF BONANZA ; INFO FROM LAND.ST :(1976)

Commodities

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

Materials information

Materials Type of material
Bornite Ore
Chalcocite Ore
Galena Ore
Pyrite Ore
Sphalerite Ore
Tennantite Ore
Jasper Gangue
Quartz 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 GOLD SHOOT BETWEEN 50 AND 180 LEVELS RANGED 0.03 TO G.T. 7 OZ/TON AU, AVERAGING 1.3 TO 1.4 OZ/TON, TWO 5-TON SHIPMENTS CONTAINED 27 TO 35 OZ/TON AU, AVERAGING 12 TO 15 OZ/TON AG, 8 TO 9% PB, 1.5 TO 2% CU, 12% ZN. BORNITE ORE FROM 180 LEVEL CONTAINED 7.55% CU, 55.3 OZ/TON AG, 0.15 OZ/TON AU. NORMAL LOWER GRADE ORE RAN 6.5 TO 16% PB, UP TO 12% ZN, 1% CU, 6 TO 22 OZ/TON AG, 0.03 TO 0.07 OZ/TON AU. MILLED ORES IN 1941-42 RAN 0.01 OZ/TON AU, 4.5 TO 6 OZ/TON AG, 8.4 TO 12.5% PB, 10 TO 15% ZN, 0.25% CU. CRUDE ORE RAN 0.01 TO 0.0166 OZ/TON AU, 6 OZ/TON AG, 6.816 TO 13.26% PB, 13 TO 15.29 % ZN, 0.347 TO 0.35% CU.

Host and associated rocks

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

Nearby scientific data

(1) -106.12949, 38.30195
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 1.22M

Controls for ore emplacement

  • See Comments

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Significant No
Year of last production 1946

Mining district

District name Bonanza (Kerber Creek)

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner Pratt-Bonanza Mining And Milling Co.
    Home office Pratt, Ks.
    First year 1946

Production statistics

  • Year 1942
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Conc. Copper Copper 0wt-pct
    Minor Conc. Zinc Zinc 33wt-pct
    Major Conc. Lead Lead 17wt-pct
    Major Conc. Silver Silver 219g/mt
    Major Conc. Gold Gold 0g/mt
  • Year 1942
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Copper Copper 0wt-pct
    Minor Ore Zinc Zinc 10wt-pct
    Major Ore Lead Lead 8wt-pct
    Major Ore Silver Silver 127g/mt
    Major Ore Gold Gold 0g/mt
  • Year 1942
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Copper Copper 0wt-pct
    Minor Ore Zinc Zinc 13wt-pct
    Major Ore Lead Lead 13wt-pct
    Major Ore Silver Silver 169g/mt
    Major Ore Gold Gold 0g/mt
  • Year 1943
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Copper Copper 0wt-pct
    Minor Ore Zinc Zinc 14wt-pct
    Major Ore Lead Lead 7wt-pct
    Major Ore Silver Silver 133g/mt
    Major Ore Gold Gold 0g/mt
  • Year 1946
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Silver Silver 163g/mt
    Major Ore Lead Lead 13wt-pct
    Major Ore Copper Copper 0wt-pct
    Minor Ore Zinc Zinc 15wt-pct
    Major Ore Gold Gold 0g/mt

Workings at the site

  • Type of workings Underground
    Length 682.75M
    Overall length 152.4M

Comments on the workings information

  • MINE IS DEVELOPED BY 340-FT INCLINED SHAFT AND FIVE PRINCIPAL LEVELS. LEVEL NAMES (BASED ON DEPTH BELOW SURFACE) AND DRIFT FOOTAGES WEST AND EAST OF SHAFT ARE AS FOLLOWS: 50 LEVEL, 75,40; 70 LEVEL, 50,0; 80 LEVEL, 75,105; 130 LEVEL, 50 (TO CAVED AREA), 410 (TO CAVED AREA); 180 LEVEL, 0, 140 (TO CAVED AREA); 230 LEVEL, 0, 190 (TO CAVED AREA). ON 80 LEVEL AT 50 FT ALONG WEST DRIFT, CROSSCUT ADIT DRIVEN SE FROM SURFACE APPROX. 150 FT TO PROVIDE DRAINAGE FOR UPPER LEVELS. ALSO ON 80 LEVEL, CROSSCUT TUNNEL DRIVEN FROM SHAFT SE TO INTERSECT SOUTH VEIN, ALONG WHICH 220 FT DRIFT DEVELOPED. RAISE CONNECTS 50,70, AND 80 LEVELS AT POINT 50 FT WEST OF SHAFT. RAISES CONNECT 80 AND 130 LEVELS AT POINTS 30 AND 80 FT EAST OF SHAFT. RAISES CONNECT 130 AND 180 LEVELS AT POINTS 15,35,75, AND 105 FT EAST OF SHAFT. RAISE CONNECTS 180 AND 230 LEVELS AT POINT 55 FT EAST OF SHAFT.

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 U.S. GOVT. RECORDS; COLO. DIV. MINES ANN. OPERATORS REPTS.

General comments

Subject category Comment text
Deposit MAIN OR NORTH VEIN TRENDS N50 TO 70E, 75 TO 80 SE. SOUTH VEIN TRENDS N50 TO 70E, BUT DIPS 55 TO 60 NW AND IS PROBABLY A HANGING WALL FAULT THAT JOINS MAIN VEIN ABOUT 15 FT BELOW 80 LEVEL. ORE SHOOT ON MAIN VEIN PITCHES 50 DEG EAST, IS BOUNDED BY CROSS-FISSURES AND PINCHOUTS, AND CONTAINS NARROW HIGH-GRADE GOLD SHOOT GRADING LATERALLY INTO LOWER GRADE PB-ZN ORE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-NOV-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.