The Kate Hardy is a gold mine located in Sierra county, California at an elevation of 4,199 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: 4,199 Feet (1,280 Meters)
Commodity: Gold
Lat, Long: 39.47806, -120.88750
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.
Kate Hardy MRDS details
Site Name
Primary: Kate Hardy
Secondary: Derelict
Commodity
Primary: Gold
Secondary: Silver
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
Alteration Type: L
Alteration Text: Carbonate
Rocks
Name: Diorite
Role: Associated
Age Type: Host Rock
Age Young: Late Permian
Analytical Data
Analytical Data: UP TO 4 % SULFIDES-CONCENTRATE
Materials
Ore: Silver
Ore: Gold
Gangue: Quartz
Gangue: Talc
Comments
Comment (Geology): VEIN IN BLACK SLATE, CUT BY DIKES OF GABBRO & SERPENTINE POST MINERAL VERT FAULT W 25-30 FT OFFSET, TO N. FURTHER S IT MAY COMPLETELY CUT OFF THE VEIN. SLATE IS MAINLY FISSILE, FINE-GRAINED. VEIN LENSES OF QUARTZITE. CLOSE TO VEIN A MASSIVE GREEN ROCK, TUFF? OR FINE GRAINED GABBROIC DIKE? THE SERPENTINE MASS CROSSING ENTIRE DISTRICT IS HERE 100-200 FT E, & SMALL DIKES FROM IT EXTEND NEARLY TO VEIN. LARGEST GABBROIC DIKE CROSSES SLATE & SERPENTINE & GRADES IN SHORT DISTANCE FROM OLIVINE GABBRO TO DIORITE W PORPHYRITIC PHASE CONTAINING ORTHOCLASE. 3 OUT CROPS OF ACIDIC INTRUSIVES: APLITE DIKE 4 TO 8 FT THICK; PYRITIZED GRANITE OF MAINLY QTZ & ORTO CLASE. VEIN CUTS SLATE AT SMALL ANGLE & IS TRACABLE 1000 FT NEARLY TO LAUA CONTACT. QTZ FLOAT INDICATES N EXTENSION FOR ABOUT 1200 FT OF VEIN. VEIN CHANGES TO ZONE OF QTZ STRINGERS & SILICIFIED SLATE 100 FT THICK. EARLY MOVEMENT REVERSED, GROOVING PITCHES A FEW DEGREES S OF DIP. RIBBON STRUCTURE DUE TO SUCCESSIVE FISSURING. LATER QTZ VEINING
Comment (Geology): CROSSES EARLIER STRUCTURE. LESS ALTERED THAN BRUSH CREEK MINE.
Comment (Production): ONE OF THE EARLIEST DISCOVERED MINES. OPERATED INTERMITTENTLY. PRODUCTION OF AU ORE REPORTED IN 1949.
Comment (Deposit): SHOOTS, VEIN, POCKET
Comment (Commodity): LG NUMBER OF SMALL BUNCHES OF HIGH GRADE ORE. HIGH GRADE SHOOTS GENERALLY VERT & END AGAINST PROMINENT SHEETING ZONES WHICH GENERALLY DIPS LESS THAN 10 N, AND IS ASSOC W. COARSE-GRAINED ARSENOPYRITE, AND IS MORE LIKELY TO BE HIGH GRADE WHERE IT APPROACHES SERPENTINE.
Comment (Location): UTM ACC. NW 1/4 NW 1/4 29, ADIT ENTRANCE.
References
Reference (Deposit): FERGUSON, H. G., & GANNETT, R. W., 1932 , GOLD QTZ VEINS OF THE ALLEGHANY DISTRICT, CALIF.;: USGS PROF PAPER 172, P 89, 91, SKETCH MAP P 90.
Reference (Deposit): LOGAN, C. A., 1929 , SIERRA CO.: CDMM 25TH REPORT STATE MINERALOGIST, APRIL, P 178.
Reference (Deposit): USBM MINERAL REPORT, 1949, P
Reference (Deposit): AVERILL, C. V., 1942 , MINES AND MINERAL RESOURCES OF SIERRA CO.: CDM CALIF. JOUR. MINES AND GEOL, VOL 38, NO 1, P 58.
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.
