The Mary Harrison Group is a gold mine located in Mariposa county, California at an elevation of 2,001 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
Elevation: 2,001 Feet (610 Meters)
Commodity: Gold
Lat, Long: 37.69528, -120.19694
Map: View on Google Maps
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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.
Mary Harrison Group MRDS details
Site Name
Primary: Mary Harrison Group
Commodity
Primary: Gold
Location
State: California
County: Mariposa
District: Coulterville
Land Status
Not available
Holdings
Not available
Workings
Type: Underground
Ownership
Owner Name: Lautenschlager, Walter J.
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Discovery Year: 1852
Years of Production:
Organization:
Significant: N
Deposit Size: M
Physiography
General Physiographic Area: Pacific Mountain System
Physiographic Province: Cascade-Sierra Mountains
Physiographic Section: Sierra Nevada
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Type: L
Description: Thrust Fault
Alterations
Alteration Type: L
Alteration Text: Oxidation By H2so4
Rocks
Name: Slate
Role: Host
Age Type: Host Rock
Age Young: Late Jurassic
Analytical Data
Not available
Materials
Ore: Gold
Gangue: Ankerite
Gangue: Quartz
Comments
Comment (Geology): BLACK SLATE IS ONE OF HOST ROCK. ; GEOL.DESC: GREENSTONE DERIVED FROM PYROXENE ANDESITE OF PALEOZOIC CALAVERAS FM. FROM HANGING WALL. FOOTWALL SLATE IS PROBABLY PART OF THE UPPER JURASSIC MARIPOSA FM. MARY HARRISON VEIN IS TRACEABLE FROM THE COUNTY LINE ON THE NORTH TO THE VIRGINIA MINE ON THE SOUTH. IT IS CHARACTERISED BY A PROMINANT, MASSIVE SHEET OF MILKY QUARTZ 4 - 20 FT. THICK BETWEEN IRREGULAR, RIBBONED MASSES OF QTZ.-MARIPOSITE-PYRITE ROCK, THE UPPER PARTS OF WHICH ARE COMMONLY CONVERTED TO POROUS, EARTHY MASSES OF YELLOWISH BROWN IRON AND SILICA OXIDES.
Comment (Production): BETWEEN $330,000 AND $400,000 PRODUCED BETWEEN 1895 & 1903 AT $5 AU/TON IN 1897 .
Comment (Deposit): VEIN IN THRUST FAULT FISSURE
Comment (Workings): 1200 FT. VERTICAL SHAFT WITH LEVELS AT 100 FT. INTERVALS, A SECOND INCLINED SHAFT ALSO WITH LEVELS AT 100 FT. INTERVALS, AN AIRSHAFT. MORE THAN 5000 FT. DRIFTS.
References
Reference (Deposit): CASTELLO, W. O., 1921 , MINES AND MINERAL RESOURCES OF MARIPOSA COUNTY IN SEVENTEENTH REPORT OF THE STATE GEOLOGIST: CALIFORNIA STATE MINING BUREAU, P. 124 - 125 .
Reference (Deposit): LOGAN, C. A., 1935 , THE MOTHER LODE BELT OF CALIFORNIA: CALIFORNIA DIVISION OF MINES BULLETIN 108 , P. 185 .
Reference (Deposit): LAIZURE, C. MCK., 1928 , SAN FRANCISCO FIELD DIVISION IN TWENTY-FOURTH REPORT OF THE STATE MINERALOGIST: CALIFORNIA STATE MINING BUREAU, P. 100 .
Reference (Deposit): 5) AUBURY, L. E., 1904 , REGISTER OF MINES AND MINERALS, MARIPOSA COUNTY CALIFORNIA: CALIFORNIA STATE MINING BUREAU, P. 12 .
Reference (Production): BOWEN & GRAY, 1957
Reference (Deposit): 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. 130 - 132 .
California Gold
"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.
