| Deposit ID | 10043924 |
|---|---|
| MRDS ID | M231229 |
| Record type | Site |
| Current site name | Keystone Shaft |
| Geographic coordinates: | -119.65517, 39.27546 (WGS84) |
|---|
Political divisions (FIPS codes)
Storey(county)
Nevada(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Virginia City(quadrangle 1:24,000 scale)
Carson City(quadrangle 1:100,000 scale)
Reno(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Middle Carson(hydrologic unit)
Carson(hydrologic accounting unit)
Central Lahontan(hydrologic subregion)
Great Basin(hydrologic region)
Federal lands
Bureau of Land Management(Bureau of Land Management NV)
Bureau of Land Management NV BLM(Type of land area)
BLM(Federal land areas administered by BLM)
| Country | State | County |
|---|---|---|
| United States | Nevada | Storey |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| Mount Diablo | 016N | 021E | Nevada |
| Commodity | Importance |
|---|---|
| Gold | Primary |
| Model code | 150 |
|---|---|
| USGS model code | 25c |
| Deposit model name | Epithermal vein, Comstock |
| Mark3 model number | 16 |
| (1) | -119.65517, 39.27546 |
|---|
| General form | TABULAR TO IRREGULAR |
|---|
| Development status | Past Producer |
|---|---|
| Commodity type | Metallic |
| Significant | No |
| Discovery year | 1900 |
| Year of first production | 1935 |
| District name | Comstock Lode |
|---|
| Ownership category | Private |
|---|
| Type | Owner |
|---|---|
| Owner | Dayton Mines |
| Type of workings | Surface/Underground |
|---|---|
| Overall depth | 121.92M |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | M231229 |
NEVADA BUREAU OF MINES AND GEOLOGY DATA BASE
STODDARD, C. AND CARPENTER, J.A., 1950.
| Subject category | Comment text |
|---|---|
| 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. |
| Deposit | SILVER CITY BRANCH OF THE COMSTOCK LODE; VEIN AND DISSEMINATED AURIFEROUS PYRITE IN ANDESITE |
| Deposit | Discovery Year: ABOUT 1900 OR BEFORE |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-JAN-1975 | Nevada Bureau Of Mines And Geology | Nevada Bureau of Mines and Geology |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.
These are landing pages for further research — the state agencies don't currently expose per-mine deep links.