Colorado

The Colorado is a gold mine located in Mariposa county, California at an elevation of 2,851 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: Colorado  

State:  California

County:  Mariposa

Elevation: 2,851 Feet (869 Meters)

Commodity: Gold

Lat, Long: 37.55556, -119.97167

Map: View on Google Maps

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 Colorado

Colorado MRDS details

Site Name

Primary: Colorado
Secondary: Colorado Quartz Mine


Commodity

Primary: Gold
Secondary: Silver


Location

State: California
County: Mariposa
District: Colorado


Land Status

Not available


Holdings

Not available


Workings

Not available


Ownership

Owner Name: Corinne Kratzer, F. E. And P. W. Judkins, Et Al.


Production

Year: 1938
Time Period: - 1938
Material type: AU
Description: Cp_Grade: ^ .12 Oz/Ton Ag
Year: 1938
Time Period: - 1938
Material type: ORE
Description: Cp_Grade: ^.31 Oz/Ton Au


Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S


Physiography

General Physiographic Area: Pacific Mountain System
Physiographic Province: Cascade-Sierra Mountains
Physiographic Section: Sierra Nevada


Mineral Deposit Model

Not available


Orebody

Form: PINCH AND SWELL


Structure

Not available


Alterations

Not available


Rocks

Name: Metasedimentary Rock
Role: Host
Age Type: Host Rock
Age Young: Late Permian


Analytical Data

Not available


Materials

Ore: Pyrite
Ore: Gold
Ore: Silver
Gangue: Quartz


Comments

Comment (Deposit): QUARTZ VEIN

Comment (Workings): 200-FT. INCLINED SHAFT, 500-FT. WORKING LEVEL, 200-FT. DRIFT, STOPE.

Comment (Geology): GEOL.DESC: SANDY METASEDIMENTS HAVE BEEN INTRUDED BY GREENSTONE DIKES AND SILLS 1-3 FT THICK. VEIN AVE 1.5-2 FT THICK, CHIEFLY BANDED QUARTZ. ORE SHOOTS ARE 30 - 75 FT WIDE AND PITCH ABOUT 45 DEG. STRIKE AND DIP OF SLATY CLEAVAGE NEAR THE SHAFT IS ROUGHLY PARALLEL TO THE VEIN AND TO THE BEDDING PLANES.

Comment (Deposit): ONE PATENTED FRACTIONAL CLAIM OF 11 ACRES AND 2 UNPATENTED CLAIMS. VEIN MATTER IS CHIEFLY BANDED QUARTZ CARRYING FREE GOLD AND A LITTLE PYRITE.

Comment (Production): NOTHING IS RECORDED OF EARLY PRODUCTION. IN THE LATE 1920'S ABOUT 2500 TONS OF ORE WAS MINED WHICH RAN $10 TO $11 PER TON WITH SOME DEVELOPMENT ROCK RUNNING $8. TOTAL PRODUCTION PROBABLY DOES NOT EXCEED $50,000 .

Comment (Location): NR. CTR. OF SEC. IN SW 1/4 UTM EST.


References

Reference (Deposit): BOWEN, O. E., JR., & GRAY, H., JR., 1957 , MINES AND MINERAL DEPOSITS OF MARIPOSA COUNTY, CALIF.: CALIF. JOUR. MINES & GEOL., VOL. 53 , NOS. 1 & 2 , P. 90 - 91 , 251 .

Reference (Deposit): LAIZURE, C. MCK., 1928 , S. F. FIELD DIV.- MARIPOSA COUNTY: 24TH REPORT STATE MINERALOGIST, VOL. 24 , NO. 2 , P. 84 , 124 .

Reference (Deposit): CASTELLO, W. O., 1921 , MARIPOSA COUNTY: 17TH REPORT STATE MINERALOGIST ( FOR 1920 ), P. 111 .

Reference (Production): BOWEN AND GRAY, 1957


California Gold

Where to Find Gold in California

"Where to Find Gold in California" looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in California. Read more: Where to Find Gold in California.