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Idaho - Maryland

Past Producer in Nevada county in California, United States with commodities Gold, Silver, Lead, Zinc, 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. Geologic structures
  11. Ore body information
  12. Economic information about the deposit and operations
  13. Production statistics
  14. Workings at the site
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10007405
MRDS ID C011231
Record type Site
Current site name Idaho - Maryland

Geographic coordinates

Geographic coordinates: -121.03881, 39.22433 (WGS84)
Elevation 774
Relative position 1/2 MI. E 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 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 25,26 California

Commodities

Commodity Importance
Gold Primary
Silver Secondary
Lead Secondary
Zinc Critical Secondary
Copper Secondary

Materials information

Materials Type of material
Gold Ore
Scheelite Ore
Sphalerite Ore
Ankerite Gangue
Dolomite Gangue
Quartz Gangue
Talc Gangue

Host and associated rocks

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

Nearby scientific data

(1) -121.03881, 39.22433
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description 3 Faults Cut Veins. Diabase Dike 20 - 30 Ft. Thick.

Ore body information

  • General form SHOOTS, SEAMS, STRINGERS, RIBBON - LIKE, FISSURES
    Strike N 77 W
    Dip 70 E
    Thickness 9.14M
    Depth to top 0M

Comments on the geologic information

  • QTZ INDICATES RIBBONED LAYERS, 1 IN. THICK, IN PLACES. INTRUDED AT DEPTH BY GRANITE.

Economic information about the deposit and operations

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

Production statistics

  • Year 1893
    Period 1868 - 1893
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 29g/mt
  • Year 1933
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 18g/mt

Comments on the production information

  • FOR YEARLY PRODUCTION VALUES BETWEEN 1868 AND 1893 , SEE MACBOYLE ( 1918 ) P. 187 . OTHER YEARLY VALUES IN JOHNSTON ( 1941 ) P. 95

Workings at the site

  • Type of workings Surface/Underground
    Length 72418.5M
    Overall depth 3450M

Comments on the workings information

  • VERTICAL, INCLINED SHAFTS, DRIFTS, STOPES, CROSSCUTS, RAISES, DIAMOND DRILLING ( 11,650 FT ) WINZES

Reference information

Bibliographic references

  • Deposit

    WOLFIN, H. M., 1941 , MINERAL RESOURCES OF NEVADA COUNTY: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, V. 37 , NO. 3 , PL. 3 P. 403 - 406 .

  • Deposit

    MACBOYLE, E., 1918 , MINES AND MINERAL RESOURCES OF NEVADA COUNTY: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, V. 16 , P. 185 - 191 .

  • Deposit

    LOGAN, C. A., 1934 , SACRAMENTO FIELD DIVISION: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, VOL. 31 , NO. 1 , P. 15 - 16 .

  • Deposit

    LOGAN, C. A., 1930 , SACRAMENTO FIELD DIVISION: REPORT XXVI OF THE STATE MINERALOGIST; CALIFORNIA DIVISION OF MINES VOL. 26 , NO. 2 , P. 114 - 118 .

  • Deposit

    5) GOODWIN, J. G., 1957 , LEAD AND ZINC IN CALIFORNIA: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, V. 53 , NOS. 3 AND 4 , P 580 .

  • Deposit

    6) JOHNSTON, W. D., 1940 , THE GOLD QUARTZ VEINS OF GRASS VALLEY, CALIFORNIA: US GEOLOGICAL SURVEY PROFESSIONAL PAPER 194 , P. 94 - 96 .

  • Production

    MACBOYLE ( 1918 ) LOGAN ( 1934 ) WOLFIN ( 1941 ) GOODWIN ( 1957 ), JOHNSON ( 1941 )

General comments

Subject category Comment text
Deposit VEINS AVG. 2 1/2 - 3 FT. W/AVG 2 % SULFIDES
Deposit PATENTED ADJOINS EUREKA CLAIM TO THE EAST ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-1979 Bowman, J. And Albers, J. U.S. Geological Survey HOST ROCK CHECKED. ENTERED ASSOCIATED ROCK TYPE.
Updater 08-OCT-1991 Mosier, Dan 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.

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.