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North Star

Past Producer in Nevada county in California, United States with commodities Gold, Copper, Lead, Zinc
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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. Alteration
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Ore body information
  13. Economic information about the deposit and operations
  14. Production statistics
  15. Reserves and resources
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10086478
MRDS ID X024328
Record type Site
Current site name North Star

Geographic coordinates

Geographic coordinates: -121.14604, 39.19406 (WGS84)
Elevation 732
Relative position 1 MI. S GRASS VALLEY

Site location context

Political divisions (FIPS codes)

Nevada(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Rough And Ready(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 015N;016N 008E;008E 03,02;27,28,34 California

Comments on the location information

  • UTM ACC. SW 1/4 34

Commodities

Commodity Importance
Gold Primary
Copper Secondary
Lead Secondary
Zinc Critical Secondary

Materials information

Materials Type of material
Gold Ore
Calcite Gangue
Quartz Gangue

Alteration

  • (Local) Oxidized To 5 - 150 Ft. Depth W/High Grade Ore

Host and associated rocks

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

Nearby scientific data

(1) -121.14604, 39.19406
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Ne-Striking Fissures, Faulting (Strike N, Dip 50 W)

Ore body information

  • General form PINCHS, SWELLS, IRREGULAR
    Strike E
    Dip N
    Depth to top 0M

Comments on the geologic information

  • DIABASE IS BRECCIATED ALONG VEINS

Economic information about the deposit and operations

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

Production statistics

  • Year 1919
    Material CON
    Accuracy Accurate
    Description Ap_Grade: ^3180 Lbs. Cu, 222000 Lbs Pb
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Conc. Copper Copper 1.43mt
  • Year 1933
    Material ORE
    Accuracy Accurate
    Description Ap_Grade: ^.38 Oz Au/Ton
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 11g/mt

Comments on the production information

  • 1933 - 34 FIGURES FOR NORTH STAR & EMPIRE MINES. COMBINED PRODUCTION OF GRASS VALLEY HOLDINGS OF NORTH STAR MINES. UP TO END OF 1928 WAS $33,267,734 . CON. AVG. $60 - $125/TON. PRODUCTION YIELD DECREASES W/DEPTH WHILE HORIZONTAL YIELD (PER SQUARE FOOT) INCREASES: $50 - $100 AU/TON 5 - 150 FT. LEVEL, TO 3000 FT. AVG. $20 AU/TON FOR ADDITIONAL PRODUCTION DATA, SEE LOGAN ( 1930 ) P. 121 - 124 .

Reserves and resources

  • Type In-situ
    Estimate year 1934
    Total resources 116000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 10.729 g/mt Gold Major 1934

Workings at the site

  • Type of workings Underground
    Length 4572M
    Overall depth 1463.04M

Comments on the workings information

  • STOPED, SHAFTS, DRIFTING, WINZE, RAISES, MANY LEVELS

Reference information

Bibliographic references

  • Deposit

    LOGAN, C. A., 1941 , MINERAL RESOURCES OF NEVADA COUNTY: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, V. 37 , NO. 3 , PL. 3 , 394 - 5 .

  • Deposit

    MACBOYLE, E., 1918 , MINES AND MINERAL RESOURCES OF NEVADA COUNTY: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, V. 16 , P. 211 - 224 .

  • Deposit

    GOODWIN, J. G., 1957 , LEAD AND ZINC IN CALIFORNIA: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, V. 57 , NOS 3 AND 4 , P. 582 .

  • Deposit

    LOGAN, C. A., 1930 , SACRAMENTO FIELD DIVISION: REPORT XXVI OF THE STATE MINERALOGIST; CALIFORNIA DIVISION OF MINES VOL. 26 , NO. 2 , P. 121 - 124 .

  • Production

    LOGAN, ( 1941 ) MACBOYLE ( 1918 ) LOGAN ( 1930 ) GOODWIN ( 1957 )

General comments

Subject category Comment text
Deposit VEINS, AVG. 16 IN. THICK. GOUGE ZONE AROUND WALLS, SULFIDES AVG. 2 %
Deposit PATENTED 1200 ACRES. CLAIM PART OF EMPIRE STAR MINES CO. INCLUDES GOLD HILL; NEW YORK HILL, NEW ROCKY BAR, GRANITE HILL, CINCINNATI & OTHERS ; 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

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.