The North Fork Mine is a gold mine located in Sierra county, California at an elevation of 4,902 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: 4,902 Feet (1,494 Meters)
Commodity: Gold
Lat, Long: 39.49778, -120.85306
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.
North Fork Mine MRDS details
Site Name
Primary: North Fork Mine
Commodity
Primary: Gold
Tertiary: Lead
Location
State: California
County: Sierra
Land Status
Not available
Holdings
Not available
Workings
Type: Surface/Underground
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
Name: Gabbro
Role: Associated
Age Type: Host Rock
Age Young: Late Permian
Analytical Data
Not available
Materials
Ore: Gold
Ore: Pyrite
Ore: Galena
Gangue: Quartz
Gangue: Talc
Comments
Comment (Location): UTM ACC. SE 1/4
Comment (Production): VEIN DISCOVERED IN OLD PLACER WORKINGS. ON MAY 31 , 1875 , $5000 TAKEN OUT IN 8 HRS.
Comment (Deposit): VEIN, ORE SHOOT
Comment (Geology): FEW IN-10 FT THICK QTZ VEIN, W SMALL STRINGERS CONTAINING ABUNDANT ALBITE. LATER QTZ VEINS CROSS EARLIER, W ASSOCIATED PYRITE & CARBONATE. FROZEN INTO HANGING WALL OF CRUSHED SLATE. FOOTWALL WELL DEFINED W GOUGE MAYBE ANDESITIC TUFF OR SLATE. PROBABLY 2 BRANCHES W PARALLEL STRIKE. MOVEMENT ALONG VEIN SHOWN ALSO BY GREENSTONE OR TUFF BEING IN HANGING WALL & BLACK CONGLOMERATIC SLATE IN FOOTWALL, & INDICATING REVERSE FAULTING. VEIN EXPLORED ON 3 LEVELS FOR 450 FT. SML GABBRO DIKE FAULTED ON E TO W ROCK CHIEFLY BLACK CONGL. SL, OVERLAIN BY ALTERED TUFF. OTHER SML DIKES OF GABBRO, OR ALTERED MORE BASIC RX. SML APLITE DIKE. VEINS APPROX. ALINE W DIADEM VEIN. ABUNDANT EVIDENCE OF POST MINERAL OPENING OF FISSURES. ON 2ND LEVEL NR WHERE XCUT REACHES VEIN, SPLITTING OF VEIN IS PRONOUNCED, & FOOTWALL CONTAINS SMALL DIKES OF FLAKY TALCOSE SCHIST, POSSIBLY DERIVED FROM SERP. STEEP E DIPPING SHEAR ZONE 200 FT E OF VEIN ON LOWEST LEVEL, MAY CORRELATE W SML QTZ STRINGERS ON 1ST LEVEL, 180 FT ABOVE.
Comment (Geology): SHAFT IN ANDESITE BRECCIA, 13 DEGREE SLOPE REACHES BEDROCK AT 230 FT E DIPPING VEIN MAY ALIGN W AMETHYST. S FORK, RED STAR MINES
Comment (Workings): INCLINED & VERT SHAFT, LEVELS AT 55 , 145 , 235 FT, 1000 FT OF DRIFTS, XCUTS,
Comment (Commodity): HIGH GRADE ORE SHOOTS 75 TO 100 FT ALONG DRIFT, ASSOC W ARSENOPYRITE
References
Reference (Deposit): AVERILL, C. V., 1942 , MINES AND MINERAL RESOURCES OF SIERRA CO: CDM CALIF. JOUR. MINES AND GEOL, VOL 38, NO 1, P 61
Reference (Deposit): LOGAN, C. A., 1929 , SIERRA CO: CDMM 25TH REPORT STATE MINERALOGIST, APRIL, P 180
Reference (Deposit): FERGUSON, H. G., & GANNETT, R. W., 1932 , GOLD QTZ VEINS OF THE ALLEGHANY DISTRICT, CALIF.;: USGS PROF PAPER 172 , P 95 - 97 , FIG 27
Reference (Production): FERGUSON AND GANNETT, 1932 .
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.
