The Boundary is a gold mine located in Nevada county, California at an elevation of 2,480 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: 2,480 Feet (756 Meters)
Commodity: Gold
Lat, Long: 39.21528, -121.08194
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.
Boundary MRDS details
Site Name
Primary: Boundary
Secondary: Grass Valley Boundary
Commodity
Primary: Gold
Secondary: Copper
Secondary: Lead
Location
State: California
County: Nevada
District: Grass Valley
Land Status
Not available
Holdings
Not available
Workings
Type: Unknown
Ownership
Not available
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
Not available
Analytical Data
Not available
Materials
Ore: Pyrite
Ore: Chalcopyrite
Ore: Galena
Ore: Gold
Gangue: Quartz
Gangue: Epidote
Comments
Comment (Location): UTM EST. SW 1/4 27 , SE 1/4 28
Comment (Production): PRODUCTION FROM BROCK VEIN EST. $182,000 , $12,000 FROM ABOVE 80 FT. DEPTH, WHEN ORE AVG. 2 - 4 OZ AU/TON. MORE RECENT WORKINGS TO THIRD LEVEL PRODUCED ABOUT $170,000 , ORE AVG. 1/2 - 3/4 OZ AU/TON. SEVERAL HIGH GRADE POCKETS YIELDED $25,000 .
Comment (Deposit): VEINS, 3 , BROCK, PEABODY, FOOTWALL, 1.5 - 3 FT. THICK
Comment (Workings): SHAFT W/EXTENSIVE WORKINGS
Comment (Deposit): 30 ACRES, INCLUDES NEW IDEA, OAK TREE QTZ. & OAK TREE MINE. ; INFO.SRC : 1 PUB LIT
References
Reference (Deposit): JOHNSTON, W. D., 1940 , THE GOLD QUARTZ VEINS OF GRASS VALLEY, CALIFORNIA: US GEOLOGICAL SURVEY PROFESSIONAL PAPER 194 , P. 63 - 65 .
Reference (Deposit): LOGAN, C. A., 1941 , MINERAL RESOURCES OF NEVADA COUNTY: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, V. 37 , NO. 3 , P. 387 , PL. 3 .
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.
