The Eldorado 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.
Eldorado MRDS details
Site Name
Primary: Eldorado
Secondary: Eldorado Ext
Secondary: Terrible
Commodity
Primary: Gold
Tertiary: Zinc
Tertiary: Lead
Tertiary: Copper
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: Gabbro
Role: Associated
Age Type: Host Rock
Age Young: Late Permian
Analytical Data
Not available
Materials
Ore: Gold
Ore: Galena
Ore: Tetrahedrite
Ore: Pyrite
Gangue: Quartz
Gangue: Marble
Comments
Comment (Location): UTM ACC. SE 1/4 34
Comment (Deposit): VEINS, ORE SHOOTS
Comment (Deposit): 3 UNPATENTED CLAIMS. ; INFO.SRC : 1 PUB LIT
Comment (Commodity): ORE SHOOTS OF HIGH-GRADE ORE ALL HIGH GRADE ORE OF VEIN IS IN BEND, WHERE QTZ IS PRESENT ONLY IN LENSES. PRINCIPAL GOLD ASSOCIATED W ARSENOPYRITE
Comment (Production): ELDORADO IS PRODUCTIVE VEIN.
Comment (Geology): 3 VEINS; EASTERN MAIN VEIN, EL DORADO, CONTINUOUS EXCEPT AT BEND - FROM N 50 W TO N 30 E STRIKE. BEND MAYBE DUE TO CROSSING OF SERPENTINE DIKE. POST MINERAL THRUSTS & INTERMINERAL THRUSTS. OUTCROP OF COARSE CRYSTALINE MARBLE AT PORTAL. DIKES OF GABBRO ALSO FAULTED BY ELDORADO VEIN. TWO SMALL MASSES OF APLITE OUTCROP IN S PART OF CLAIM. COUNTRY ROCK AMPHIBOLITE SCHIST. GROOVING ON HANGING WALL HAS N 85 E, & ELSEWHERE N 65 E STRIKE, THE LATTER MOST INTENSE. VEIN REOPENING INDICATED BY QTZ-CEMENTED BRECCIA ALONG HANGING WALL. VEIN FOLLOWS REVERSE FAULT, SAME AS PLUMBAGO VEIN MAYBE, DISPLACEMENT 50 FT IN N, 100 FT IN S. MIDDLE AND BULLION VEINS, STRIKE N 30 W & NO 20 W.
Comment (Workings): AT LEAST 3 ADITS, WINZES, SUBLEVELS W 3600 FT DRIFTS, 1000 FT RAISES & WINZES.
References
Reference (Production): FERGUSON & GANNETT, 1932
Reference (Deposit): AVERILL, C. V., 1942 , MINES AND MINERAL RESOURCES OF SIERRA CO.: CDM CALIF. JOUR. MINES AND GEOL., VOL. 38 , NO. 1 , P. 54 .
Reference (Deposit): LOGAN, C. A., 1929 , SIERRA CO.: CDMM 25TH REPORT STATE MINERALOGIST, APRIL, P. 176 .
Reference (Deposit): FERGUSON, H. G., & GANNETT, R. W., 1932 , GOLD QTZ VEINS OF THE ALLEGHANY DISTRICT, CALIF.; USGS PROF. PAPER 172 , P. 118 , 119 , PLS 55 , 56 .
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.
