The Keystone Shaft is a gold mine located in Storey 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
Keystone Shaft MRDS details
Site Name
Primary: Keystone Shaft
Commodity
Primary: Gold
Location
State: Nevada
County: Storey
District: Comstock Lode
Land Status
Land ownership: Private
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.
Holdings
Not available
Workings
Type: Surface/Underground
Ownership
Owner Name: Dayton Mines
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1935
Discovery Year: 1900
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Physiography
General Physiographic Area: Intermontane Plateaus
Physiographic Province: Basin And Range Province
Physiographic Section: Great Basin
Physiographic Detail: Basin And Mountains
Mineral Deposit Model
Model Name: Epithermal vein, Comstock
Orebody
Form: TABULAR TO IRREGULAR
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Not available
Materials
Not available
Comments
Comment (Deposit): THE KEYSTONE CLAIM COVERS THE FIRST OUTEROPPING OF THE SILVER CITY BRANCH BELOW THE MAIN COMSTOCK LODE. IN THE EARLY DAYS IT WAS DEVELOPED BY A TUNNEL, AN INCLINED SHAFT WITH LEVELS TO 270 FEET, AND A 400 FT VERTICAL SHAFT. THE ORE DEVELOPED WAS TOO LOW GRADE FOR STOPING BUT WITH THE INCREASED PRICE OF GOLD PROFITABLE SHIPMENTS WERE MADE IN THE 1930'S WITH A RECORDED PRODUCTION THROUGH 1939 OF $146.44 FROM 15,074 TONS. THE DAYTON MINE TOOK OVER, REHABILITED THE SHAFT, AND MINED PYRITIC ANDESITE FROM THE CROSSCUTS. BY THE TIME THE DAYTON MINE CLOSED, 170,000 TONS OF $10 KEYSTONE ORE HAD BEEN MINED. NEARLY 90% WAS GOLD VALUES WITH OVER A 90% EXTRACTION RATE.
Comment (Deposit): Discovery Year: ABOUT 1900 OR BEFORE
Comment (Development): EARLY ORE TOO LOW-GRADE TO STORE, BUT PROFITABLE BY THE 1930'S. DAYTON MINES TOOK OVER AND REHABILITATED THE SHAFT AND MINED PYRITIC ANDESITE.
Comment (Deposit): SILVER CITY BRANCH OF THE COMSTOCK LODE; VEIN AND DISSEMINATED AURIFEROUS PYRITE IN ANDESITE
Comment (Workings): TUNNEL, SHAFT, INCLINE
References
Reference (Deposit): NEVADA BUREAU OF MINES AND GEOLOGY DATA BASE
Reference (Production): STODDARD, C. AND CARPENTER, J.A., 1950.
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.
