Keystone Shaft

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

Name: Keystone Shaft

State:  Nevada

County:  Storey

Elevation:

Commodity: Gold

Lat, Long: 39.27556, -119.65417

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.


Satelite image of the Keystone Shaft

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

Gold Districts of Nevada

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.