The Union Gulch is a copper mine located in Marin 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.
Union Gulch MRDS details
Site Name
Primary: Union Gulch
Secondary: Bolinas
Secondary: Chetco
Secondary: Pearson and Bros.
Commodity
Primary: Copper
Secondary: Gold
Secondary: Silver
Location
State: California
County: Marin
Land Status
Not available
Holdings
Not available
Workings
Type: Underground
Ownership
Owner Name: J. G. Wilkins
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Discovery Year: 1863
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Pacific Mountain System
Physiographic Province: Pacific Border Province
Physiographic Section: California Coast Ranges
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Chalcopyrite
Ore: Pyrite
Gangue: Quartz
Comments
Comment (Workings): SHAFT, MORE THAN 2500 FT. OF DRIFTS ON 100 AND 180 FT. LEVEL
Comment (Deposit): MOST OF THE WORKINGS ARE NOW CAVED (1954) AND LITTLE REMAINS OF BUILDINGS AND EQUIPMENT.
Comment (Production): SOME ORE SHIPPED IN EARLY DAYS BY UNION GULCH MINING CO.
Comment (Deposit): NINE PARALLEL VEINS 6 INCHES TO 2 FT.
References
Reference (Deposit): AUBURY, L.E., 1908 ; COPPER RESOURCES OF CALIFORNIA BULL. 50 ; CALIF. MIN. BUR., P. 168 - 169
Reference (Deposit): ERIC, J.H., 1948 : COPPER IN CALIFORNIA BULL. 144 ; DIV. OF MINES, P. 264
Reference (Deposit): PLANCK, WM. E. VER., 1955 : MINES AND MINERAL RESOURCES OF MARIN COUNTY, CA.; CALIF. JOUR. MINES AND GEOLOGY, VOL. 51 , NO. 3 ; DIV. OF MINES, P. 279 .
Reference (Production): ERIC, J.H., 1948 .
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.
