Marposa

  

Mine Info

State: California

County: Mariposa

Elevation: 2,073 feet (632 meters)

Primary Mineral: Gold

Lat, Long: 37.48889, -119.95750



Marposa MRDS details

Site Name

Commodity

Location

Primary: "Marposa"
Primary: Gold
State: California
County: Mariposa
District: Mariposa
 

Land Status

Holdings

Workings

Land ownership: Private
Administrative Organization:
Type: Underground


Ownership

Production

Deposit

Owner Name: Mrs. Frank E. Gallagher
Company ID:
Percent:
Home Office:
Info Year:
Years: -

Owner Name: George Adams
Company ID:
Percent:
Home Office:
Info Year:
Years: 1957 -

Record Type: Site
Operation Category: Past Producer
Deposit Type:
Plant Type:
Plant Subtype:
Operation Type: Unknown
Mining Method:
Milling Method:
Year First Production:
Year Last Production:
Discovery Year: 1849
Discovery Method:
Years of Production:
Organization:
Significant: Y
Deposit Size: M


Physiography

Mineral Deposit Model

Orebody

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


Structure

Alterations

Rocks



Analytical Data

Materials

Ore: Pyrite
Ore: Gold
Gangue: Quartz


Comments

Comment Type:
Workings
Comment WORKINGS INCLUDE OLD UNUSABLE SHAFT 475 FT. DEEP, THREE COMPARTMENT MAIN SHAFT 1550 FT. DEEP WITH 8 LEVELS & 5757 FT. OF DRIFTS. MOST OF THE ORE HAS BEEN STOPED OUT ABOVE THE 800 FT. LEVEL AND THERE ARE A NUMBER OF RAISES AND CROSSCUTS AS WELL AS A DRAINAGE TUNNEL.
Comment Type:
Geology
Comment GEOL.DESC: EAST OF THE MAIN SHAFT THE MARIPOSA VEIN STRIKES N 70 W, AND DIPS 60 - 70 SW. BETWEEN THE MAIN AND OLD SHAFTS THE VEIN BRANCHES WITH ONE BRANCH STRIKING OFF AT N 50 W. VEIN WIDTHS VARY FROM 2 - 5 FT. WIDE EAST OF THE JUNCTION LINE OF THE TWO BRANCHES. THE BRANCHES DO NOT AVERAGE MORE THAN TWO FEET WIDE. VEIN MATTER IS MILKY QUARTZ, COMMONLY RIBBONED TOWARD THE BORDERS BY THIN INCLUSIONS OF WALL ROCK.
Comment Type:
Production
Comment GRADE OF ORE FELL FROM $25 IN 1864 TO $10 - 11/TON IN 1870 . 1927 STATE HIWAY COMMISSION PRODUCED 35,000 TONS AT CRUSHED ROCK OF UNANNOUNCED VALUE FROM MARIPOSA DUMPS. 1927 - 1932 LESSEES WORKED THE EXTENSION OF THE MARIPOSA VEIN, TAKING OUT ABOUT 1500 TONS OF LOW GRADE ORE & SEVERAL SMALL HIGH-GRADE POCKETS.
Comment Type:
Deposit
Comment VEIN
Comment Type:
Deposit
Comment Discovery Year: SPRING, 1849
Comment Type:
Deposit
Comment DISCOVERY CREDITED TO KIT CARSON AND TWO ASSOCIATES. LAND WAS INCLUDED IN LAS MARIPOSAS GRANT OWNED BY J. C. FREMONT. VEIN MATTER IS MILKY QUARTZ, COMMONLY RIBBONED TOWARD THE BORDERS BY THIN INCLUSIONS OF WALL ROCK, WITH NATIVE GOLD, PYRITE AND ARSENOPYRITE; HIGH -GRADE POCKETS NEARLY ALWAYS CONTAIN ARSENOPYRITE, TWO POCKETS ARE REPORTED TO HAVE YIELDED $30,000 AND $15,000. ACTIVE IN 1955 . POSSIBLY STILL ACTIVE.


References

Reference Category:
Deposit
Pages:
Reference: LOGAN, C. A., 1935 , THE MOTHER LODE BELT OF CALIFORNIA: CALIFORNIA DIVISION OF MINES BULLETIN 108 , P. 184 - 185 .
URL:
Reference Category:
Deposit
Pages:
Reference: 5) LAIZURE, C. MCK., 1928 , SAN FRANCISCO FIELD DIVISION IN TWENTY-FOURTH REPORT OF THE STATE MINERALOGIST: CALIFORNIA STATE MINING BUREAU, P. 99 - 100 .
URL:
Reference Category:
Production
Pages:
Reference: BOWEN & GRAY 1957
URL:
Reference Category:
Deposit
Pages:
Reference: BOWEN, O. E., JR., GRAY, C. H., JR., 1957 , MINES AND MINERAL DEPOSITS OF MARIPOSA COUNTY, CALIFORNIA: CALIF. JOUR. MINES AND GEOLOGY, V. 53 , NOS. 1 AND 2 , P. 128 - 130 , 281 .
URL:
Reference Category:
Deposit
Pages:
Reference: CASTELLO, W. O., 1921 , MINES AND MINERAL RESOURCES OF MARIPOSA COUNTY IN SEVENTEENTH REPORT OF THE STATE GEOLOGIST: CALIFORNIA STATE MINING BUREAU, P. 124 .
URL:
Reference Category:
Deposit
Pages:
Reference: AUBURY, L. E., 1904 , REGISTER OF MINES AND MINERALS, MARIPOSA COUNTY CALIFORNIA: CALIFORNIA STATE MINING BUREAU, P.
URL:

Did You Know.......

A mine is a hole in the ground, owned by a liar.
-Mark Twain

About The MRDS Mines Database

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.

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