| Deposit ID | 10165287 |
|---|---|
| MRDS ID | X025475 |
| MAS/MILS ID | 0060910290 |
| Record type | Site |
| Current site name | Oxford Mine |
| Alternate or previous names | Jefferson No.2 Claim, Milton Claim, Oxford Mine and Mill |
| Related records | 10086547 |
| Point of reference | Trench |
|---|---|
| Geographic coordinates: | -120.82633, 39.57158 (WGS84) |
| Elevation | 2079 |
| Location accuracy | 10(meters) |
Political divisions (FIPS codes)
Sierra(county)
California(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Downieville(quadrangle 1:24,000 scale)
Portola(quadrangle 1:100,000 scale)
Chico(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Upper Yuba(hydrologic unit)
Lower Sacramento(hydrologic accounting unit)
Sacramento(hydrologic subregion)
California(hydrologic region)
Federal lands
Tahoe National Forest(National Forest)
National Forest FS(Type of land area)
FS(Federal land areas administered by FS)
| Country | State | County |
|---|---|---|
| United States | California | Sierra |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| Mount Diablo | 020 N | 010 E | 22 | S2NWSE | California |
| Commodity | Importance |
|---|---|
| Chromium Critical | Tertiary |
| Iron | Tertiary |
| Materials | Type of material |
|---|---|
| Chromite | Unknown |
| Olivine | Unknown |
| Penninite | Unknown |
| Serpentine | Unknown |
| Uvarovite | Unknown |
| Trench (1) | -120.82633, 39.57158 |
|---|
| Strike | N55W | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dip | 55N | ||||||||||||||||||||||||||||||||
| Thickness | 9M | ||||||||||||||||||||||||||||||||
| Length | 30M | ||||||||||||||||||||||||||||||||
| Width | 1M | ||||||||||||||||||||||||||||||||
| Area | 3HA | ||||||||||||||||||||||||||||||||
| Depth to top | 0M | ||||||||||||||||||||||||||||||||
| |||||||||||||||||||||||||||||||||
| Operation type | Underground |
|---|---|
| Development status | Past Producer |
| Commodity type | Metallic |
| Deposit size | Small |
| Significant | No |
| Discovery year | 1918 |
| Year of first production | 1918 |
| District name | Downieville Area |
|---|
| Ownership category | National Forest |
|---|
| Type | Operator |
|---|---|
| Owner | E. R. C. Zaring Last Operator 1941 |
| Home office | California |
| Year | 1976 |
| Type | Operator |
|---|---|
| Owner | C. L. Best- Last Operator |
| Home office | California |
| Year | 1975 |
| First year | 1942 |
| Last year | 1944 |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| U.S. Bureau of Mines | Minerals Availability System | MAS | 0060910290 | |
| USGS | Mineral Resources Data System | MRDS | X025475 | MAS references MRDS |
CDMG BULL 134 GEOL INVEST OF CHROMITE IN CAL;PT 3,SIERRA NEV
P 5 SIERRA CO. PP 257-258 1953
CAL JOUR OF MINES AND GEOL VOL 38NO 1,PP 16, 1942 AVRILL
| Subject category | Comment text |
|---|---|
| Deposit | ABOUT 2250 LONG TONS OF ORE HAS BEEN PRODUCED-2000 TONS OF GRADE OF ORE 40.60 PERCENT CR2O3(ORE),11.76 PERCENT FE,0.22 5102,0.10 PERCENT P WITH CR/FE RATIO 2.36:1. CITED FROM REFE 700. INADEQUATE RESOURCES FOR COST ANALYSIS. CR2O3. OBSERVED DURING RECENT VISIT 1975. INADEQUATE RESOURCES FOR COST ANALYSIS. ANALYSIS BY CDMG IN 1976 GAVE FOLLOWING PERCENTAGES-MASSIVE 2 02.10,CR2O3 56.64,FEO 10.98,TOTAL FE 15.76,AL203 07.56,MGO CR/FE 3.16. |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 05-NOV-1984 | Unknown | 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.