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  3. Mineral Resource Data System (MRDS)

Boreham

Past Producer in Nevada 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. Geologic structures
  11. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10007393
MRDS ID C011209
Record type Site
Current site name Boreham
Alternate or previous names Grass Valley Boreham
Related records 10236817

Geographic coordinates

Geographic coordinates: -121.03242, 39.23489 (WGS84)
Elevation 805
Relative position S SLOPE TOWN TULK RIDGE 2 MI. S NEVADA CITY

Site location context

Political divisions (FIPS codes)

Nevada(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Grass Valley(quadrangle 1:24,000 scale)

Yuba City(quadrangle 1:100,000 scale)

Chico(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Bear(hydrologic unit)

Lower Sacramento(hydrologic accounting unit)

Sacramento(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Nevada

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 016N 008E 24 California

Comments on the location information

  • UTM EST. SW 1/4

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Quartz Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Schist
    Rock unit name Calaveras Complex
    Rock description Calaveras Complex

Nearby scientific data

(1) -121.03242, 39.23489
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Fault N 65 W, 58 E Crosses Vein

Ore body information

  • Thickness 2.44M
    Depth to top 0M

Controls for ore emplacement

  • Ore Generally Richer On Footwall Side

Comments on the geologic information

  • HANGING WALL SERPENTINE, FOOTWALL CALAVERAS SCHIST, BLACK W/IMPERFECTLY DEVELOPED SLATY CLEAVAGE.

Economic information about the deposit and operations

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

Mining district

District name Grass Valley, Nevada City

Comments on the production information

  • $2000 IN HIGH GRADE ORE FROM ONE ROUND OF SHOTS.

Workings at the site

  • Type of workings Underground
    Length 146.3M
    Overall depth 41.15M

Comments on the workings information

  • INCLINE & DRIFTS, RAISE

Reference information

Bibliographic references

  • Deposit

    LOGAN, C. A., 1930 , SACRAMENTO FIELD DIVISION: REPORT XXVI OF THE STATE MINERALOGIST; CALIFORNIA DIVISION OF MINES VOL. 26 , NO. 2 , P. 113 - 114

General comments

Subject category Comment text
Deposit VEIN, 1 - 8 FT. THICK

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1979 Bowman, J. And Albers, J. U.S. Geological Survey PARSED HOST ROCK AND ASSOCIATED ROCK INFORMATION FROM OLD SINGLE VALUED FIELD TO NEW MULTIVALUED FIELD
Editor 27-APR-1995 Mosier, Dan U.S. Geological Survey

Beyond USGS

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

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.