Missouri Girl Mine

The Missouri Girl Mine is a copper mine located in Montezuma county, Colorado at an elevation of 8,199 feet.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

Name: Missouri Girl Mine  

State:  Colorado

County:  Montezuma

Elevation: 8,199 Feet (2,499 Meters)

Commodity: Copper

Lat, Long: 37.57889, -108.17889

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Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.


Satelite image of the Missouri Girl Mine

Missouri Girl Mine MRDS details

Site Name

Primary: Missouri Girl Mine
Secondary: Missouri Girl Deposit


Commodity

Primary: Copper


Location

State: Colorado
County: Montezuma
District: Bear Creek District


Land Status

Land ownership: National Forest
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.
Administrative Organization: San Juan N. F.


Holdings

Not available


Workings

Type: Unknown


Ownership

Owner Name: T.L. Jackson, C.L. Snyder, C.F. Eggers
Info Year: 1953


Production

Not available


Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Underground
Year First Production: 1909
Discovery Year: 1909
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S


Physiography

General Physiographic Area: Intermontane Plateaus
Physiographic Province: Colorado Plateaus
Physiographic Section: Canyon Lands


Mineral Deposit Model

Model Name: Polymetallic veins


Orebody

Form: VEINLETS, LENTICULAR MASSES, DISSEMINATED


Structure

Type: R
Description: San Juan Uplift (San Juan Mountains), La Plata Mountains Dome

Type: L
Description: Small Ne-Trending Fault About 0.5 Mile To Northwest; Parallel Faults, Fractures


Alterations

Alteration Type: L
Alteration Text: Hydrothermal Alteration, Bleaching


Rocks

Name: Monzonite
Role: Associated
Age Type: Host Rock Unit
Age Young: Late Triassic

Name: Monzonite
Role: Associated
Age Type: Host Rock
Age Young: Late Triassic

Name: Monzonite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Pliocene

Name: Monzonite
Role: Associated
Age Type: Associated Rock
Age Young: Pliocene


Analytical Data

Analytical Data: SORTED ORE CONTAINED 25-30% CU
Analytical Data: UNSORTED ORE REPORTED TO CONTAIN 4-5% CU


Materials

Ore: Chalcocite
Ore: Malachite
Gangue: Pyrite
Gangue: Limonite
Gangue: Calcite


Comments

Comment (Development): FROM 1904-1931 NO PRODUCTION WAS LISTED. DURING 1931-1939 AND 1941 SMALL AMOUNTS OF AU WERE RECOVERED BY SLUICING.

Comment (Deposit): MAY HAVE BEEN 2 SOURCES FOR GOLD. IT HAS BEEN DESCRIBED AS LIGHT YELLOW AND DULL YELLOW.

Comment (Production): ESTIMATE PRODUCTION AS GREATER THAN $30000.

Comment (Location): (LAND STATUS AND ADMINISTRATIVE AREA LOCATIONS CALCULATED USING GIS OVERLAY ANALYSIS FOR SAN JUAN N. F.). ON NORTH SIDE OF LA PLATA MOUNTAINS, ALONG BEAR CREEK NEAR ITS JUNCTION WITH DOLORES RIVER; SOUTH AND SOUTHWEST OF RICO; UNSURVEYED; NORTH OF DOLORES RIVER OPPOSITE STEWART GULCH ; INFO FROM LAND.ST :1976

Comment (Production): 2 OR 3 CARLOADS OF UNSORTED ORE CONTAINING 4-5% CU SHIPPED IN 1909-10. TOTAL PRODUCTION ABOUT 6 CARLOADS

Comment (Geology): ALL OF THE DEPOSITS IN THIS AREA ARE CLOSELY RELATED TO THE MONZONITE PORPHYRY DIKES

Comment (Deposit): DEPOSIT WITHIN 40 FT OF BORDER OF MONZONITE PORPHYRY DIKE, CONCENTRATED IN FRACTURED COALY SEAMS IN SANDSTONE

Comment (Workings): 3 PARALLEL TUNNELS EACH 40 TO 80 FT LONG, ONE CROSSCUT TUNNEL; WORKINGS EXPLORE 3 SMALL, STEEPLY DIPPING FAULTS ALONG BORDERS OF DIKE, TWO ON EAST SIDE, ONE ON WEST SIDE OF DIKE.

Comment (Deposit): Merged and deleted record 10239503, derived from MAS 0080830080, listed "Green Frog" as a previous name. A.B. Wilson was unable to confirm this information. It is not mentioned in PP-219. Same record listed holdings as a located claim.

Comment (Reference): All references except PP-219 are from the deleted record 10239503.

Comment (Production): Deleted record 10239503 estimates production at 150 tones ore.

Comment (Ownership): Ownership info from deleted record 10239503.

Comment (Location): LAT LONG ARE GENERAL FOR DISTRICT. UNSURVEYED AREA. ; INFO FROM LAND.ST :(1959)

Comment (Geology): PLACER AU PROBABLY ORIGINATED IN SMALL VEINS RELATED TO THE TERTIARY INTRUSIVES OVER WHICH THE CREEK FLOWS.


References

Reference (Deposit): GODDARD, E.N., 1949, COPPER DEPOSITS OF THE BEAR CREEK DISTRICT, IN ECKEL, E.B., 1949, GEOLOGY AND ORE DEPOSITS OF THE LA PLATA DISTRICT, COLORADO: USGS PROF. PAPER 219, P. 70-72, 150-152.


Colorado Mining Photos

Placer mines at Cripple Creek, Colorado ca. 1892

Check out this collection of Colorado's best historic mining photos: Incredible Photos of Colorado Mining Scenes.