The Black Hill is a gold mine located in Mariposa county, California.
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.
Black Hill MRDS details
Site Name
Primary: Black Hill
Secondary: Pumpkin
Commodity
Primary: Gold
Location
State: California
County: Mariposa
Land Status
Not available
Holdings
Not available
Workings
Type: Underground
Ownership
Owner Name: Louise A. Boyd
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Discovery Year: 1867
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
Not available
Structure
Type: L
Description: En Echelon Vein System
Alterations
Not available
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Gold
Ore: Pyrite
Comments
Comment (Location): E 1/2 . UTM EST.
Comment (Commodity): LOW GRADE ORE
Comment (Workings): MAIN INCLINED SHAFT SURMOUNTED BY A WOODEN HEADFRAME AND ORE BIN, TWO TUNNELS, SEVERAL AUXILLIARY SHAFTS AND STOPES.
Comment (Production): LITTLE RECORD OF ACTIVITY BEFORE 1890'S WHEN CONSIDERABLE DEVELOPMENT WORK MUST HAVE BEEN DONE. MINE REOPENED IN 1900 AND SOME RICH ORE WAS DISCOVERED.VERY LITTLE HAS BEEN DONE ON THE PROPERTY SINCE 1902 AND WORKINGS WERE CAVED AND INACCESSIBLE IN SEPTEMBER, 1954.
Comment (Deposit): VEIN
Comment (Geology): GEOL.DESC: SERPENTINE IS NEAR SLATE. LOW GRADE ORE ALSO FOUND AS PYRITIC IMPREGNATIONS IN SERPENTINE WALL ROCK ADJACENT TO THE VEIN.
Comment (Deposit): PATENTED LAND. THIS MINE IS THE MOST NORTHERLY MINE IN THE MARY HARRISON GROUP WHICH IS ALIGNED ON A BRANCH OF THE MOTHER LODE VEIN SYSTEM COMMONLY CALLED THE EAST BRANCH.
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. 78 - 79 , 241 .
Reference (Deposit): RANSOME, F. L., 1900 , MOTHER LODE DISTRICT FOLIO: USGS GEOL. ATLAS OF THE US, FOLIO 63 , CLAIM SHEET 2 , SEC 4 (LOC.).
Reference (Production): BOWEN AND GRAY, 1957 .
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.
