Number 5 Group

Past Producer in Stanislaus county in California, United States with commodities Chromium, Iron
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. Nearby scientific data
  9. Ore body information
  10. Economic information about the deposit and operations
  11. Mining district
  12. Mineral rights holdings
  13. Land status
  14. Ownership information
  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 10166274
MAS/MILS ID 0060990033
Record type Site
Current site name Number 5 Group
Alternate or previous names Mineral Products Company Property

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -121.40772, 37.41102 (WGS84)
Elevation 427
Location accuracy 100(meters)

Site location context

Political divisions (FIPS codes)

Stanislaus(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Mount Boardman(quadrangle 1:24,000 scale)

San Jose(quadrangle 1:100,000 scale)

San Jose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Panoche-San Luis Reservoir(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Stanislaus

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 006 S 005 E 15 NENESE California

Commodities

Commodity Importance
Chromium Critical Tertiary
Iron Tertiary

Materials information

Materials Type of material
Chromite Unknown
Olivine Unknown
Pyroxene Unknown
Serpentine Unknown

Nearby scientific data

Main Entrance (1) Mesozoic gabbroic rocks, unit 2 (undivided)

Economic information

Ore body information

  • Thickness 1M
    Length 200M
    Width 30M
    Area 3HA
    Depth to top 0M
    Field Value
    Type of Orebody #1 DISSEMINATED
    Shape of Orebody #1 LENTICULAR
    Type of Orebody #2 FISSURE VEIN
    Shape of Orebody #2 IRREGULAR
    Shape of Orebody #3 TABULAR
    Primary mode of Origin MAGMATIC DIFFER
    Primary Ore Control LITHOLOGY
    Degree of Wallrock Alter. INTENSE
    Type of Wallrock Alter. #1 OTHER
    Strike And Dip E00W:
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 0
    Min. Thick. Unconsol. Mat. 0
    Total Surface Area (HA) 3
    Date of Last Modification 820825

Economic information about the deposit and operations

Operation type Surface-Underground
Development status Past Producer
Commodity type Metallic
Significant No
Discovery year 1916
Year of first production 1917

Mining district

District name Del Puerto Area

Mineral rights holdings

Type of mineral rights Fee Ownership

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner Higuera, Larry
    Interest 100
    Home office California
    Year 1976

Workings at the site

  • Type of workings Surface
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Mining Method OPEN PIT
    Hardness of Ore M-HARD ROCKS
  • Type of workings Underground
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Mining Method GOPHERING (COYOTING) 10-29
    Swell Factor .6
    Hardness of Rock HARDROCK FISSURED WITH MODERATE WATER
    Rock Characteristics MULTIPLE SYSTEMS OF WEAKNESS PLANES
    Rock Support Chars. SUPPORTING MAY BACK SLAB
    Mine Support Chars. POST, HEADBOARD, CAPS, ROOF BOLTS
    Number of Adits 4
    1st Condition of Workings PLUGGED
    2nd Condition of Workings NO MINE ENTRY
    3rd Condition of Workings PART ACCESSIBLE

Reference information

Bibliographic references

  • Deposit

    CAL STATE MIN.BUR BULL.76 P.205, 1918

  • Deposit

    CJMG VOL.43 NO.2 P.91 1947

  • Deposit

    USGS BULL 936-D P.97-98 PLATE 111942

  • Deposit

    COM BULL 134 PART 2 NO 2 P.76 1953

General comments

Subject category Comment text
Deposit ORE RAN 53 PERCENT CHROMITE AND 30.70 PERCENT CR2O3. CONCENT AN 57.62 PERCENT CR2O3,16.36 PER CENT FE,WITH CR/FE RATIO 2. Y DATA FROM RECORD 702. INSUFFICIENT DATA FOR MATRIX CALCULATIONS. ANALYSIS BY CDMG IN 1976 GAVE FOLLOWING PERCENTAGES-DISSEMIN E=S102 09.03,CR2O3 42.02,FEO 13.83,TOTAL FE 16.08,AL203 09.1 4.69,CR/FE 2.30.

Reporter information

Type Date Name Affiliation Comment
Reporter 27-FEB-1984 Stinson U.S. Bureau of Mines

Beyond USGS

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

Authoritative California resources

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