The Johnson Mine & Group is a copper and silver mine located in Elko county, Nevada at an elevation of 6,601 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: 6,601 Feet (2,012 Meters)
Commodity: Copper, Silver
Lat, Long: 41.68722, -114.63111
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.
Johnson Mine & Group MRDS details
Site Name
Primary: Johnson Mine & Group
Commodity
Primary: Copper
Primary: Silver
Secondary: Gold
Secondary: Molybdenum
Location
State: Nevada
County: Elko
District: Contact (48)
Land Status
Not available
Holdings
Not available
Workings
Type: Underground
Ownership
Owner Name: Montilla Mining Co.
Years: 1912 -
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Discovery Year: 1912
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Intermontane Plateaus
Physiographic Province: Columbia Plateau
Physiographic Section: Snake River Plain
Mineral Deposit Model
Model Name: Skarn Cu
Orebody
Form: IRREGULAR
Structure
Type: L
Description: Granodiorite Stock With Assoc. Faults, Fractures
Alterations
Alteration Type: L
Alteration Text: Oxidation
Rocks
Name: Diorite
Role: Associated
Age Type: Host Rock Unit
Age Young: Late Permian
Name: Diorite
Role: Associated
Age Type: Associated Rock
Age Young: Late Jurassic
Name: Diorite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Late Jurassic
Analytical Data
Not available
Materials
Ore: Chalcopyrite
Ore: Bornite
Comments
Comment (Location): COVERS MOST OF JOHNSON HILL
Comment (Production): SMALL PRODUCTION INCLUDED SOME MOLYBDENUM
Comment (Development): 9 OR MORE CLAIMS
Comment (Deposit): THIS GROUP COMPRISES 9 OR MORE CLAIMS AND COVERS MOST OF JOHNSON HILL. THE PRINCIPAL OPENINGS ARE A 400-FOOT TUNNEL AND A 100-FOOT SHAFT. THE TUNNEL SHOWS 6 INCHES TO 18 INCHES OF BANDED AND CRUSHED PARTLY MINERALIZED VEIN MATERIAL FOR MUCH OF ITS LENGTH; HOWEVER, COPPER CARBONATE STAINING IS VERY SPORADIC AND THERE IS NO TRACE OF ORE. THE SHAFT IS ALSO LOCATED ON THE GRANODIORITE-LIMESTONE CONTACT AND AT 100 FEET IS STILL IN THE OXIDIZED ZONE (SCHRADER, 1912, 141-2). ; INFO.SRC : 1 PUB LIT
Comment (Geology): GRANODIORITE IS UNUSUALLY DARK WITH FAR MORE THAN THE ORDINARY AMOUNT OF GREEN HORNBLENDE, AND IS CRUSHED, SHEARED, PRESSED, AND SHISTOSE. BOTH GRANODIORITE AND LIMESTONE ARE CUT BY DIKES OF COARSE QUARTZ SYENITE PORPHYRY YOUNGER THAN THE SHEARING (SCHRADER, 1912, P 142).
Comment (Deposit): TUNNEL SHOWS 6 TO 18 INCHES OF BANDED & CRUSHED PARTLY MINERALIZED VEIN MATERIAL FOR MUCH OF ITS LENGTH. SHAFT IS ON THE GRANODIORITE-LIMESTONE CONTACT. ORE IS OXIDIZED TO 100 FEET DOWN, AT LEAST
Comment (Workings): 400-FT. TUNNEL; 100 FT. SHAFT ON THE GRANODIORITE - LIMESTONE CONTACT.
References
Reference (Deposit): SMITH, R.M. (1976) MINERAL RESOURCES OF ELKO CO., NEV: USGS OFR 76-56, P 39-45
Reference (Deposit): SCHRADER, F.C. (1936) THE CONTACT MINING DISTRICT, NEVADA: USGS BUL. 847-A
Reference (Deposit): HOPE, R.A.& COATS, R.R. (1976) PRELIM. GEOLOGIC MAP OF ELKO CO., NEV: USGS OFR 76-779.
Reference (Deposit): SCHRADER, F.C. (1912) A RECONN. OF THE JARBRIDGE, CONTACT, AND ELK MT. MINING DISTRICTS, ELKO COUNTY, NEVADA: USGS BUL 497.
Reference (Production): SMITH, R.M. (1976)
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.
