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  3. Mineral Resource Data System (MRDS)

Ophir

Past Producer in Sierra county in California, United States with commodity Gold
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Host and associated rocks
  9. Nearby scientific data
  10. Ore body information
  11. Economic information about the deposit and operations
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10034803
MRDS ID M021723
Record type Site
Current site name Ophir

Geographic coordinates

Geographic coordinates: -120.8577, 39.45711 (WGS84)
Relative position 1 MI. SW OF ALLEGHANY

Site location context

Political divisions (FIPS codes)

Sierra(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Alleghany(quadrangle 1:24,000 scale)

Truckee(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)

Geographic areas

Country State County
United States California Sierra

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 019N 010E 34 California

Comments on the location information

  • UTM EST. SE 1/4

Commodities

Commodity Importance
Gold Primary

Comments on the commodity information

  • PRACTICALLY ALL PRODUCTION CAME FROM REGION OF BEND IN VEIN.

Materials information

Materials Type of material
Gold Ore
Quartz Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Schist
    Stratigraphic age (youngest) Late Permian
  • Host or associated Host
    Rock type Metamorphic Rock > Serpentinite

Nearby scientific data

(1) -120.8577, 39.45711
ListMap

Economic information

Ore body information

  • Strike N 62 W
    Dip 60 NE
    Thickness 1.52M

Comments on the geologic information

  • VEIN ON NORMAL FAULT, ON HANGING WALL SIDE FROM SIXTEEN TO ONE, W DISPLACEMENT ONLY A FEW FEET. NEAR SIXTEEN TO ONE VEIN, OPHIR VEIN VEERS SHARPLY TOWARDS PARALLELISM; HERE ALSO MINOR THRUSTING. QTZ. DISCONTINUOUS, ONE PLACE ABSENT FOR 300 FT. ALONG FAULT. NEAR N SHAFT QTZ. REAPPEARS. 2 BRANCH VEINS WHICH DON'T SEEM TO CONTINUE FAR FROM MAIN VEIN.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No

Comments on the production information

  • NO OTHER PRODUCTION RECORD FOUND.

Comments on the workings information

  • TWO ADITS. TWO SHAFTS FROM LOWEST ADIT. EXTENT OF LOWEST WORKINGS UNKNOWN, BUT SEVERAL THOUSAND FT. OF DRIFTS AT LEAST.

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit VEIN

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1979 Hayden, F. (Albers, J.) U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

External references

Maps centered on this site

Authoritative California resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.