| Deposit ID | 10187175 |
|---|---|
| MRDS ID | M007918 |
| MAS/MILS ID | 0060170021 |
| Record type | Site |
| Current site name | Murphy Mine |
| Related records | 10030020 |
| Point of reference | Trench |
|---|---|
| Geographic coordinates: | -120.95042, 38.5427 (WGS84) |
| Elevation | 299 |
| Location accuracy | 100(meters) |
Political divisions (FIPS codes)
El Dorado(county)
California(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Latrobe(quadrangle 1:24,000 scale)
Placerville(quadrangle 1:100,000 scale)
Sacramento(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Upper Cosumnes(hydrologic unit)
San Joaquin(hydrologic accounting unit)
San Joaquin(hydrologic subregion)
California(hydrologic region)
| Country | State | County |
|---|---|---|
| United States | California | El Dorado |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| Mount Diablo | 008 N | 009 E | 14 | S2S2SE | California |
| Commodity | Importance |
|---|---|
| Chromium Critical | Tertiary |
| Iron | Tertiary |
| Materials | Type of material |
|---|---|
| Chromite | Unknown |
| Magnetite | Unknown |
| Morganite | Unknown |
| Pyroxene | Unknown |
| Serpentine | Unknown |
| Trench (1) | -120.95042, 38.5427 |
|---|
| Strike | N20E | ||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dip | 80W | ||||||||||||||||||||||||||||||||||||
| Length | 62M | ||||||||||||||||||||||||||||||||||||
| Width | 6.1M | ||||||||||||||||||||||||||||||||||||
| Area | 1HA | ||||||||||||||||||||||||||||||||||||
| Depth to top | 0M | ||||||||||||||||||||||||||||||||||||
| |||||||||||||||||||||||||||||||||||||
| Operation type | Surface |
|---|---|
| Development status | Past Producer |
| Commodity type | Metallic |
| Significant | No |
| Year of first production | 1918 |
| District name | Latrobe District |
|---|
| Type of mineral rights | Patented |
|---|---|
| Type of mineral rights | Private Lease |
| Ownership category | Private |
|---|
| Type | Owner |
|---|---|
| Owner | Eglopf, William And Laura |
| Interest | 100 |
| Home office | California |
| Year | 1976 |
| First year | 1976 |
| Type | Operator |
|---|---|
| Owner | El Dorado Chrome Co, Lease 1953 |
| Home office | California |
| Year | 1976 |
| Type | Operator |
|---|---|
| Owner | Edward Hadsel And Jerry Grant Sub-Lease 1953 |
| Home office | California |
| Year | 1976 |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| U.S. Bureau of Mines | Minerals Availability System | MAS | 0060170021 | |
| USGS | Mineral Resources Data System | MRDS | M007918 | MAS references MRDS |
CALF JOUR MINE & GEOL,V52,P387, 1956
CDM AND G BULL 134 PT3 SIERRA NEVADA,CHAP4 PP123-124, 194
| Subject category | Comment text |
|---|---|
| Deposit | CR TO FE RATIO 27:1 GRADE,CR2O3 14%,(1953)CAL JOUR OF MINE RESERVE ESTIM.1500 TONS.RECORD 701. PAST PRODUCTION 3000 TONS UPTO 1918, 2000 TON PROD 1942,AN XIMATELY 1500 TONS IN 1953. -INSUFFICENT RESOURCE FOR COSTIN DERABLE PROMISE FOR FURTHER DISCOVERIES WITH EXPLOR AT DEPTH ANALYSIS BY CDMG IN 1976 GAVE FOLLOWING PERCENTAGES-DISSEMIN E,COARSE GRAINED=S102 2.86,CR2O3 52.98,FEO 15.10,TOTAL FE 17 03 9.45,MGO 9.95,CR/FE 2.64.DISSEMINATED ORE,FINEDGRAINED=S1 CR2O3 51.15,FEO 14.93,TOTAL FE 16.08,AL203 9.45,MGO 11.19,CR |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 27-FEB-1984 | Stinson | 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.