Boundary

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

Name: Boundary  

State:  California

County:  Nevada

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.


Satelite image of the Boundary

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

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"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.