| Deposit ID | 10190465 |
|---|---|
| MRDS ID | W025880 |
| MAS/MILS ID | 0061030009 |
| Record type | Site |
| Current site name | West Pit of Grau Mine |
| Alternate or previous names | North Elder Creek Group |
| Related records | 10111209 |
| Point of reference | Trench |
|---|---|
| Geographic coordinates: | -122.67279, 40.02816 (WGS84) |
| Elevation | 756 |
| Location accuracy | 100(meters) |
Political divisions (FIPS codes)
Tehama(county)
California(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Raglin Ridge(quadrangle 1:24,000 scale)
Red Bluff(quadrangle 1:100,000 scale)
Redding(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Lower Sacramento(hydrologic accounting unit)
Sacramento(hydrologic subregion)
California(hydrologic region)
Federal lands
Mendocino National Forest(National Forest)
National Forest FS(Type of land area)
FS(Federal land areas administered by FS)
| Country | State | County |
|---|---|---|
| United States | California | Tehama |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| Mount Diablo | 025 N | 007 W | 17 | W2NWNE | California |
| Commodity | Importance |
|---|---|
| Chromium Critical | Primary |
| Materials | Type of material |
|---|---|
| Antigorite | Unknown |
| Chromite | Unknown |
| Enstatite | Unknown |
| Magnesite | Unknown |
| Olivine | Unknown |
| Trench (1) | -122.67279, 40.02816 |
|---|
| Thickness | 6M | ||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Length | 30.5M | ||||||||||||||||||||||||||||
| Width | 12.2M | ||||||||||||||||||||||||||||
| Area | 50HA | ||||||||||||||||||||||||||||
| Depth to top | 0M | ||||||||||||||||||||||||||||
| |||||||||||||||||||||||||||||
| Operation type | Surface |
|---|---|
| Development status | Past Producer |
| Commodity type | Metallic |
| Significant | No |
| Discovery year | 1886 |
| Year of first production | 1942 |
| District name | North Elder Crk |
|---|
| Type of mineral rights | Unknown |
|---|
| Ownership category | National Forest |
|---|
| Type | Owner |
|---|---|
| Owner | John K. Withers |
| Interest | 100 |
| Home office | California |
| Year | 1985 |
| Type | In-situ | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Estimate year | 1946 | ||||||||||||||
| Indicated | 4000mt ore | ||||||||||||||
| Demonstrated | 4000mt ore | ||||||||||||||
| Inferred | 4000mt ore | ||||||||||||||
| Total resources | 8000mt ore | ||||||||||||||
| |||||||||||||||
| Type | In-situ | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Estimate year | 1946 | ||||||||||||||
| Measured | 20mt ore | ||||||||||||||
| Demonstrated | 20mt ore | ||||||||||||||
| Total resources | 20mt ore | ||||||||||||||
| |||||||||||||||
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| U.S. Bureau of Mines | Minerals Availability System | MAS | 0061030009 | |
| USGS | Mineral Resources Data System | MRDS | W025880 | MAS references MRDS |
CALIF DIV MINES GEOL BULL 134 CH 3 PP133-191 1965.
RYNEARSON, A.G., USGS BULLETIN 945-G, 1946
CALIF JOUR MINES GEOL V42 NO3 PP183-195 1946.
CALIF STATE DIV MINES 39TH REPT STATE MINERAL CH 1 PP90-92 1
WFOC MIN PROP FILE.
| Subject category | Comment text |
|---|---|
| Deposit | 3/75 ORE BODY TYPE - DISSEMINATED,STRINGERS & MASSIVE; ORE & Y ROCK FORMING CONTEMPORANEOUSLY. ALT. TYPE - SERPENTINIZATION. MIN CAP DEV 15M EQUIP 061030011 WORK CAP 70M CUSTOM MILL,NO CAP.COSTS INVOLVEDCR/FE RATIO 3:1. |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 12-JUL-1993 | Wetzel, Nicholas | 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.