| Deposit ID | 10235156 |
|---|---|
| MRDS ID | M006028 |
| MAS/MILS ID | 0060090349 |
| Record type | Site |
| Current site name | Keystone Union |
| Alternate or previous names | Calaveras Copper |
| Related records | 10028813 |
| Point of reference | Main Entrance |
|---|---|
| Geographic coordinates: | -120.64771, 37.98431 (WGS84) |
| Elevation | 305 |
| Location accuracy | 100(meters) |
Political divisions (FIPS codes)
Calaveras(county)
California(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Copperopolis(quadrangle 1:24,000 scale)
Oakdale(quadrangle 1:100,000 scale)
San Jose(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Upper Stanislaus(hydrologic unit)
San Joaquin(hydrologic accounting unit)
San Joaquin(hydrologic subregion)
California(hydrologic region)
| Country | State | County |
|---|---|---|
| United States | California | Calaveras |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| Mount Diablo | 002 N | 012 E | 34 | NESWNW | California |
| Commodity | Importance |
|---|---|
| Copper | Tertiary |
| Gold | Tertiary |
| Lead | Tertiary |
| Silver | Tertiary |
| Main Entrance (1) | -120.64771, 37.98431 |
|---|
| Operation type | Underground |
|---|---|
| Development status | Past Producer |
| Commodity type | Metallic |
| Deposit size | Large |
| Significant | No |
| Type of mineral rights | Patented |
|---|
| Type of workings | Underground | ||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| |||||||||||||||||||||||||||||||||||||||
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| U.S. Bureau of Mines | Minerals Availability System | MAS | 0060090349 | |
| USGS | Mineral Resources Data System | MRDS | M006028 | MAS references MRDS |
REF 1 CALIF.DIV.OF MINES, COPPER IN CALIF, BULL.144, CALIF.
NAT.RES.,1948. INCLUDES PLATES OF MINE MAPS, REFERENC
3 & 4,P 427;EC MINERAL MAP NO 7,1957;COUNTY REPT NO 2,P 24-2
REF 2 LYMAN MOORE DATA FROM 1970 EVALUATION
ED,SEPT 1,1944,P 26;CALIF B 176,P 170,171 & 174
REF 3 CALIF.DIV.OF MINES AND GEOLOGY, MINES AND MINERAL RES
OF CALIVERAS COUNTY,CALIF., COUNTY REPORT NO.2, 196
| Subject category | Comment text |
|---|---|
| Deposit | PRELIMINARY COMMENTS. FOLLOWING 2 YEARS OF PREPRODUCTION, TH WILL OPERATE THE SECOND 4 YEARS OF AN 8 YEAR PROGRAM. THE MINE WILL OPERATE THE FIRST 4 YEARS. ALL ORE PROCESSED AT MILL. REFER TO PENN MINE (ID 060090102) COMMENTS 800 TO 84 CAPITAL COSTS ASSOCIATE WITH THE MILL ARE ATTRIBUTED TO TH PROPERTY. COSTS LISTED BELOW REFLECT ADDITIONAL INVESTMENT THE KEYSTONE-UNION MINING OPERATION REC 101 ESTIMATE LIFE OF 4 YEARS BASED ON PLANT CAPACITY, RE REC 120 BASE YEAR 1970 USE FOR COSTING MINE MINE CAPITAL COSTS TOTAL 1,825,700 (1970 DOLLAR VALU ACQ 30,000 EXPLOR 385,000 DEVEL 1,410,700 EQUIP 0 PLANT 0 WORK.CAP. 0 MINE OPERATING COSTS 11.355/MT REC 151 MILL CAPITAL COST ATTRIBUTED TO PENN PROPERTY(ID 060 BOXES FLAGGED .0001 OR .00001 REFER TO THE ABOVE MIL COMMENT REC 160 ORE TRUCKED 61KM TO PENN MILL. |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 08-JUN-1984 | Lewis, J.D. | U.S. Bureau of Mines |
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.