The White Porphyry 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: 37.62861, -120.08222
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.
White Porphyry Group MRDS details
Site Name
Primary: White Porphyry Group
Commodity
Primary: Gold
Location
State: California
County: Mariposa
District: Cat Town
Land Status
Not available
Holdings
Not available
Workings
Type: Surface/Underground
Ownership
Owner Name: F. E. Ryberg
Production
Not available
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
Not available
Structure
Not available
Alterations
Not available
Rocks
Name: Mafic Intrusive Rock
Role: Associated
Age Type: Host Rock
Age Young: Late Permian
Analytical Data
Not available
Materials
Gangue: Albite
Gangue: Quartz
Comments
Comment (Location): UTM EST ALT EST
Comment (Deposit): VEIN, DIKE 30 - 50 FT THICK
Comment (Workings): 2 PARALLEL LINES ON EITHER WALL OF ALBITITE DIKE TRACEABLE FOR OVER 1 MILEFROM LENGTH AND PERSISTANCE OF STOPES AND THE KNOWN HIGH GRADE OF ORE IN POCKETS IN THIS DISTRICT, THE YIELD MUST HAVE BEEN LARGE. THE MOST NORTHERLY WORKINGS WERE BEING OPERATED BY RYBERG IN SEPT. 1955FROM LENGTH AND PERSISTANCE OF STOPES AND THE KNOWN HIGH GRADE OF ORE IN POCKETS IN THIS DISTRICT, THE YIELD MUST HAVE BEEN LARGE. THE MOST NORTHERLY WORKINGS WERE BEING OPERATED BY RYBERG IN SEPT. 1955
Comment (Geology): CALAVERAS GP.,
References
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. 181 - 183 , 315
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.
