Michigan Mine

Saguache County, Colorado, United States

Lead Silver Copper Gold Zinc

Land & claims · BLM · live

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BLM MLRS ↗Claims at this point ↗Surface mgmt ↗

Surface manager + active mining claims at this point, live from BLM. The "open to location" notes are a general 1872-Mining-Law guide, not BLM output — decision-support only; verify with BLM MLRS and on the ground before staking or entry.

Commodities

PrimaryLead, Silver, Copper, Gold

SecondaryZinc

Commodity typeMetallic

Deposit

Deposit sizeSmall

Ore controlSee Comments

Materials

Ore mineralsGalena, Pyrite, Sphalerite, Tennantite

GangueBarite, Jasper, Quartz

Geology

Host rockAndesite · Rawley Andesite

Associated rockAndesite

StructureSawatch Range, San Juan Volcanic Field, Rio Grande Rift, Bonanza Caldera

Tectonic settingCentral Cordillera (Southern Rocky Mtns.)

AlterationEarly 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.

Economic & production

Development statusPast Producer

Community notes

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References

PATTON, H.B., 1916, GEOLOGY AND ORE DEPOSITS OF THE BONANZA DISTRICT, SAGUACHE COUNTY, COLORADO: COLORADO GEOLOGICAL SURVEY BULL. 9, 136 P.BURBANK, W.S., 1932, GEOLOGY AND ORE DEPOSITS OF THE BONANZA MINING DISTRICT, COLORADO: USGS PROF. PAPER 169, 166 P.

Identification

Deposit ID10013080

MRDS IDD009176

RegionNA

Data scoreB

Coordinates38.32612, -106.12004