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Boundary

Past Producer in Nevada county in California, United States with commodities Gold, Lead, Copper
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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. Mining district
  13. Workings at the site
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10007420
MRDS ID C011258
Record type Site
Current site name Boundary
Alternate or previous names Grass Valley Boundary
Related records 10213045

Geographic coordinates

Geographic coordinates: -121.08298, 39.21517 (WGS84)
Elevation 756
Relative position W GRASS VALLEY

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 Yuba(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 27,28 California

Comments on the location information

  • UTM EST. SW 1/4 27 , SE 1/4 28

Commodities

Commodity Importance
Gold Primary
Lead Secondary
Copper Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Gold Ore
Pyrite Ore
Epidote Gangue
Quartz Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite > Diabase

Nearby scientific data

(1) -121.08298, 39.21517
ListMap

Economic information

Ore body information

  • Strike NW
    Dip 50 SW
    Thickness 0.91M
    Depth to top 0M

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

Comments on the production information

  • PRODUCTION FROM BROCK VEIN EST. $182,000 , $12,000 FROM ABOVE 80 FT. DEPTH, WHEN ORE AVG. 2 - 4 OZ AU/TON. MORE RECENT WORKINGS TO THIRD LEVEL PRODUCED ABOUT $170,000 , ORE AVG. 1/2 - 3/4 OZ AU/TON. SEVERAL HIGH GRADE POCKETS YIELDED $25,000 .

Workings at the site

  • Type of workings Unknown
    Overall depth 219.46M

Comments on the workings information

  • SHAFT W/EXTENSIVE WORKINGS

Reference information

Bibliographic references

  • Deposit

    JOHNSTON, W. D., 1940 , THE GOLD QUARTZ VEINS OF GRASS VALLEY, CALIFORNIA: US GEOLOGICAL SURVEY PROFESSIONAL PAPER 194 , P. 63 - 65 .

  • Deposit

    LOGAN, C. A., 1941 , MINERAL RESOURCES OF NEVADA COUNTY: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, V. 37 , NO. 3 , P. 387 , PL. 3 .

General comments

Subject category Comment text
Deposit VEINS, 3 , BROCK, PEABODY, FOOTWALL, 1.5 - 3 FT. THICK
Deposit 30 ACRES, INCLUDES NEW IDEA, OAK TREE QTZ. & OAK TREE MINE. ; INFO.SRC : 1 PUB LIT

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.