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Michigan Mine

Past Producer in Saguache county in Colorado, United States with commodities Lead, Silver, Copper, Gold, Zinc
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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 10013080
MRDS ID D009176
Record type Site
Current site name Michigan Mine

Geographic coordinates

Geographic coordinates: -106.12004, 38.32612 (WGS84)
Elevation 3493
Relative position 16.1 MILES N 03 E FROM SAGUACHE

Site location context

Political divisions (FIPS codes)

Saguache(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Whale Hill(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 18 NE OF NE OF SE 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 ON SOUTH SLOPE OF MOUNT MANITOU ABOVE RAWLEY GULCH ; INFO FROM LAND.ST :1976

Commodities

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

Materials information

Materials Type of material
Galena Ore
Pyrite Ore
Sphalerite Ore
Tennantite Ore
Barite Gangue
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 ORE PRODUCTION FROM 1881 TO 1900 INDICATES AVERAGE CONTENT OF 20 TO 25 % PB AND 8 TO 10 OZ/TON AG. SMALL ORE SHIPMENT FROM MICHIGAN VEIN NEAR INTERSECTION WITH PARAGON VEIN ASSAYED 8.9 % PB, 2.9 % CU, 9.1 OZ/TON AG, 0.03 OZ/TON AU.

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > 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) -106.12004, 38.32612
ListMap

Economic information

Geologic structures

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

Ore body information

  • Thickness 9.14M

Controls for ore emplacement

  • See Comments

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Bonanza (Kerber Creek)

Land status

Ownership category Private

Comments on the production information

  • PATTON ESTIMATES 700 TONS ORE VALUED AT $24,500 PRODUCED FROM 1881 TO 1900. PRODUCTION IN 1888 INCLUDED $5,337 AG AND $8,253 PB. PRODUCTION IN 1890 INCLUDED $1,337 AG AND $2,471 PB. PRODUCTION IN 1920, 1921, AND 1939 COMBINED WITH PARAGON AND OTHER PROPERTIES, SEE PARAGON MINE FOR PARTIAL PRODUCTION RECORD.

Comments on the workings information

  • MINE DEVELOPED BY ONE SHAFT OF UNKNOWN DEPTH AND TWO TUNNELS SW (DOWNSLOPE) FROM SHAFT. UPPER TUNNEL 350 FT SW OF SHAFT AND DRIVEN APPROX. 175 FT NE ALONG VEIN. LOWER TUNNEL IS APPROX. 570 FT SW OF SHAFT AND DRIVEN APPROX. 100 FT NE ALONG VEIN.

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.

General comments

Subject category Comment text
Deposit MICHIGAN VEIN TRENDS N 20 TO 25E, DIPPING 45 TO 58 SE AND APPEARS TO BE NE-TRENDING BRANCH OF PARAGON FAULT, CONFINED TO FOOTWALL OF PARAGON FAULT. NEAR THEIR INTERSECTION, MICHIGAN VEIN BECOMES COMPLEX FISSURE ZONE 30 FT OR MORE WIDE. MINERALIZED PART OF MICHIGAN FISSURE TURNS SHARPLY TO PARALLEL PARAGON FAULT NEAR INTERSECTION. ORE MOSTLY ZINC WITH MINOR PB HERE. FARTHER NE AT MICHIGAN WORKINGS, EARLY SHIPPING ORES WERE OXIDIZED, CONTAINING PB CARBONATE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-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.