Little Jenny Mine

The Little Jenny Mine is a copper, silver, zinc, and lead mine located in Saguache county, Colorado at an elevation of 11,319 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

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.

Site Name

Primary: Little Jenny Mine
Secondary: Jenny Mine
Secondary: Jennie Mine

Commodity

Primary: Copper
Primary: Silver
Primary: Zinc
Primary: Lead
Secondary: Gold

Location

State: Colorado
County: Saguache
District: Bonanza (Kerber Creek)

Land Status

Land ownership: Private
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.

Holdings

Not available

Workings

Type: Underground

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1883
Year Last Production: 1958
Years of Production:
Organization:
Significant: N

Physiography

General Physiographic Area: Rocky Mountain System
Physiographic Province: Southern Rocky Mountains

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Type: R
Description: Sawatch Range, San Juan Volcanic Field, Rio Grande Rift

Type: L
Description: Bonanza Caldera

Alterations

Alteration Type: L
Alteration Text: 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 Solution Deposit Ore And Gangue And Caused Micaceous Alteration(Sericite And Chlorite) And Calcite, Quartz, And Pyrite.

Rocks

Name: Andesite
Role: Associated
Age Type: Host Rock
Age Young: Oligocene

Name: Andesite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Oligocene

Name: Andesite
Role: Associated
Age Type: Host Rock Unit
Age Young: Oligocene

Name: Andesite
Role: Associated
Age Type: Associated Rock
Age Young: Oligocene

Analytical Data

Analytical Data: SEE 1948 AND 1950 PRODUCTION ORE GRADES

Materials

Ore: Chalcopyrite
Ore: Galena
Ore: Tennantite
Ore: Pyrite
Ore: Stromeyerite
Gangue: Quartz
Gangue: Rhodonite
Gangue: Rhodochrosite
Gangue: Apatite

Comments

Comment (Location): S-T-R, LAT-LONG, AND ELEV. TAKEN FROM BURBANK'S (1932) PLATE 1 (SCALE 1:12000). MINE OR CLAIM LIES NEAR SOSTHENES GULCH SOUTH OF SOSTHENES MINE ; INFO FROM LAND.ST :(1976)

Comment (Development): CLAIM ORIGINALLY OPENED BY SHAFT, BUT DRIVING TUNNEL DISCLOSED BLIND ORE BODY WHICH WAS SUBSEQUENTLY DEVELOPED

Comment (Deposit): VEIN STRIKES S15E, DIPS STEEPLY WESTWARD TO NEARLY VERTICAL, BUT AT POINT 350 FT FROM PORTAL, VEIN SPLITS, TUNNEL FOLLOWS EAST BRANCH TRENDING S45 TO 50E, 70 NE

Comment (Workings): ONE SHAFT (UNKNOWN DEPTH); INITIAL TUNNEL HEADING S5E FOR 70 FT, THENCE IRREGULARLY FOR 310 FT AT S15 TO 40 E, THENCE 180 FT AT S45 TO 50E.

References

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

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

Colorado Mining Photos

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