The Big Twenty Mine is a silver and gold mine located in Mineral county, Nevada.
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.
Big Twenty Mine MRDS details
Site Name
Primary: Big Twenty Mine
Secondary: NBMG # 3784
Commodity
Primary: Silver
Primary: Gold
Location
State: Nevada
County: Mineral
District: Mountain View District
Land Status
Not available
Holdings
Not available
Workings
Type: Underground
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Deposit Type: Vein
Operation Type: Unknown
Year First Production: 1904
Discovery Year: 1904
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Intermontane Plateaus
Physiographic Province: Basin And Range Province
Physiographic Section: Great Basin
Physiographic Detail: Basin And Mountains
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Sericitization Of Country Rock
Rocks
Name: Diorite
Role: Associated
Age Type: Host Rock Unit
Age Young: Late Cretaceous
Name: Diorite
Role: Associated
Age Type: Associated Rock
Age Young: Late Cretaceous
Name: Diorite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Late Cretaceous
Name: Diorite
Role: Associated
Age Type: Host Rock
Age Young: Late Cretaceous
Analytical Data
Not available
Materials
Ore: Gold
Ore: Pyrite
Gangue: Quartz
Comments
Comment (Location): N END WASSUK RANGE, OF SUMMIT NEAR E-WSPUR RISING ABOVE GRANITE SITE
Comment (Deposit): THREE SUB PARALLEL VEINS, A CONTINUATION OF THE VEIN AT MOUNTAIN VIEW MINE, RANGING FROM A FEW INCHES TO 4 FEET WIDE. THE CROPPINGS OF THE VEINS CONSIST OF IRON-STAINED QUARTZ, UNDERGROUND THEY ARE REPRESENTED BY FRACTURE ZONES, ALONG WHICH THE GRANODIORITE IS SERICITIZED FOR A WIDTH OF 1 TO 2 FEET. SMALL IRON-STAINED QUARTZ STRINGERS CUT THE ALTERED ROCK IN A FEW PLACES, SHOWING SOME MANGANESE STAIN.
Comment (Workings): SEVERAL INCLINED SHAFTS AND A LONG CROSSCUT TUNNEL THREE SHORT ADITS AND A SHAFT
Comment (Geology): GOLD OCCURS IN VEIN IN SMALL IRREGULAR POCKETS
Comment (Deposit): THE MINERALIZATION WAS REPORTED TO BE MAINLY ON THE SOUTHSIDE OF THE DIKE. THE VEIN FILLING WAS DESCRIBED AS A SOFT LIGHT PUMICE-LIKE QUARTZ CONTAINING A LITTLE SULPHUR THOUGHT TO BE A PRODUCT OF THE OXIDATION OF PYRITE.THE DUMPS ARE COVERED WITH PYRITE AND SULPHUR. THE OLD MILL APPEARS TO HAVE TREATED SOME OF THE ORE WHICH IS NOW WITHIN THE WALKER RIVER INDIAN RESERVATION. ; INFO.SRC : 1 PUB LIT
References
Reference (Deposit): VANDERBURG, 1937, RECONNAISSANCE OF MINING DISTRICTS IN MINERAL COUNTY, NEVADA; USBM IC 6941
Reference (Deposit): ROSS, 1961, GEOLOGY AND MINERAL DEPOSITS OF MINERAL COUNTY, NEVADA; NBMG BULL. 58
Reference (Deposit): HILL, 1915, SOME MINING DISTRICTS IN NORTHEASTERN CALIFORNIA AND NORTHWESTERN NEVADA; USUGS BULL. 594
Reference (Deposit): LINCOLN, 1923, MINING DISTRICTS AND MINERAL RESOURCES OF NEVADA; NEVADA NEWSLETTER PUBLISHING CO.
Reference (Deposit): RANSOME, 1908, "THE YERINGTON COPPER DISTRICT, NEVADA";USGS BULL. 380, P. 118
Reference (Deposit): TELLURIDE CLAIMS, MOUNTAIN VIEW MINING DISTRICT,MINERAL COUNTY, QUADE SITE VISIT 6-12-89,NBMG UNPUBLISHED MINING DISTRICT FILES (TINGLEY FILES)
Nevada Gold
Nevada has a total of 368 distinct gold districts. Of the of those, just 36 are major producers with production and/or reserves of over 1,000,000 ounces, 49 have production and/or reserves of over 100,000 ounces, with the rest having less than 100,000 ounces. Read more: Gold Districts of Nevada.
