The Minnie D Extension is a gold mine located in Sierra 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.
Minnie D Extension MRDS details
Site Name
Primary: Minnie D Extension
Commodity
Primary: Gold
Location
State: California
County: Sierra
Land Status
Not available
Holdings
Not available
Workings
Not available
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: Schist
Role: Host
Age Type: Host Rock
Age Young: Late Permian
Analytical Data
Not available
Materials
Ore: Gold
Ore: Pyrite
Gangue: Quartz
Comments
Comment (Deposit): PART OF MORNIN GLORY PROPERTY BUT WORKED INDEPENDENTLY. ; INFO.SRC : 1 PUB LIT
Comment (Production): NO OTHER PRODUCTION RECORD FOUND.
Comment (Deposit): VEINS
Comment (Workings): 3 ADITS, SEVERAL CUTS, MORE THAN 1150 FT. OF DRIFTS & CROSSCUTS.
Comment (Geology): 3 DISTINCT VEINS & MINOR BRANCHES & COMPLEX SYSTEM OF FAULTS OF DIFFERENT AGES. THREE ROCK TYPES. 1) A BANDED CHLORITE-AMPHIBOLITE SCHIST OF RATHER SLATY ASPECT, BELIEVED TO REPRESENT ORIGINAL WATER-LAID TUFF & SHALES, 2) AMPHIBOLITE SCHIST WITH NEEDLE HORNBLENDE XTLS, 3) MASSIVE AMPHIBOLITE PROBABLY ORIGINALLY A BASIC FLOW. 3 SYSTEMS OF PREMINERAL FISSURES. THE OLDEST HAS A NW STRIKE, DIPS NE, CONFORMING TO PRODUCTIVE FISSURES OF NEAR VICINITY. TWO PRINCIPAL VEINS STRIKE N 20 W , WITH LOW W DIP, IN PART A CONTEMPORANEOUS SYSTEM W FIRST. 3RD DIPS W AND IS LATER THAN CONTROLLING FAULTS. PARALLEL FAULTS, 10 FT. APART, NORMAL & REVERSE, THE LATTER POST MINERAL, & PROBABLY PREMINERAL OR INTERMINERAL & LIMITS SMALL ORE SHOOT. INTERMINERAL MOVEMENT GROOVES WITH PYRITE, PYRITE ON FREE WALLS W/O GOUGE, & RARE SULFIDE BANDING IN QTZ. MAJOR POST MINERAL FAULTING ALONG PREMINERAL FISSURES, PARALLEL TO VEINS.
References
Reference (Deposit): FERGUSON, H. G., & GANNETT, R. W., 1932 , GOLD QTZ. VEINS OF THE ALEGHANY DISTRICT, CALIF.; USGS PROF. PAPER 172 , P. 112 , 113
Reference (Production): FERGUSON, 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.
