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Chrome Ridge Deposits

Past Producer in Josephine county in Oregon, United States with commodity Chromium
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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. Nearby scientific data
  9. Ore body information
  10. Economic information about the deposit and operations
  11. Mining district
  12. Land status
  13. Ownership information
  14. Production statistics
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. Reporter information

Geologic information

Identification information

Deposit ID 10201396
MRDS ID M061552
MAS/MILS ID 0410330324
Record type Site
Current site name Chrome Ridge Deposits
Alternate or previous names Violet 0410330215, Shady Cove 0410330323, Buster, Sordy Group
Related records 10095666

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -123.72836, 42.44762 (WGS84)
Elevation 1250
Location accuracy 100(meters)

Site location context

Political divisions (FIPS codes)

Josephine(county)

Oregon(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Chrome Ridge(quadrangle 1:24,000 scale)

Grants Pass(quadrangle 1:100,000 scale)

Medford(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Illinois(hydrologic unit)

Southern Oregon Coastal(hydrologic accounting unit)

Oregon-Washington Coastal(hydrologic subregion)

Pacific Northwest(hydrologic region)

Federal lands

Rogue River-Siskiyou National Forests(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Oregon Josephine

Public Land Survey System information

Meridian Township Range Section Fraction State
Willamette 036 S 009 W 11 SWSWSE Oregon

Commodities

Commodity Importance
Chromium Critical Primary

Materials information

Materials Type of material
Alunite Unknown
Magnetite Unknown
Olivine Unknown
Serpentine Unknown
Uvarovite Unknown

Nearby scientific data

Main Entrance (1) -123.72836, 42.44762
ListMap

Economic information

Ore body information

  • Thickness 5M
    Length 50M
    Width 10M
    Depth to top 0M
    Field Value
    MAS Matrix # 1
    MAS Column # 1
    Type of Orebody #1 DISSEMINATED
    Shape of Orebody #1 IRREGULAR
    Primary mode of Origin MAGMATIC DIFFER
    Primary Ore Control FAULTING
    Secondary Ore Control LITHOLOGY
    Degree of Wallrock Alter. MODERATE
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 0
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 840627
  • Area 50HA
    Field Value
    Total Surface Area (HA) 50
    Date of Last Modification 910418

Economic information about the deposit and operations

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

Mining district

District name Chrome Ridge

Land status

Ownership category National Forest

Ownership information

  • Type Owner
    Owner Del Norte Chrome Ltd.
    Interest 100
    Home office 744 West Hastings, Vancouver B. C., Canada
    Year 1984

Production statistics

  • Year 1958
    Period 1917-1958
    Description Total Production, 1917-1958 2317 Long Tons Shipping Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Chromium Chromium 2317mt

Comments on the reserve resource information

  • M1C1=M1C2+M1C3+M1C4 M1C1=TOTAL MILL GRADE RESOURCE FROM THE BUSTER AND THE VIOLET DEPOSITS. MC2=M1C1-M1C2-M1C3-M1C4 M1C2=TOTAL MILL GRADE RESOURCE AT THE BUSTER DEPOSIT. M1C3=M1C1-M1C2-M1C4 M1C3=TOTAL MILL GRADE RESOURCE AT THE UPPER VIOLET DEPOSIT. M1C4=M1C1-M1C2-M1C3 M1C4=TOTAL MILL GRADE RESOURCE AT THE LOWER VIOLET DEPOSIT. M2C1=TOTAL LOW GRADE RESOURCE AT THE LOWER VIOLET DEPOSIT. M3C1=TOTAL MILL GRADE RESOURCE AT THE SANDY COVE DEPOSIT. M4C1=TOTAL HIGH-GRADE RESOURCE AT THE SHADY COVE DEPOSIT.

Workings at the site

  • Type of workings Surface
    Area 10HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method OPEN PIT
    Swell Factor .6
    Percent Waste Rock 66.7
    Avg. Overburden Thickness 0
    Primary Material Cover SAND, SILT
    Hardness of Ore M-HARD ROCKS
    Avg. Bench Height (meters) 4
    Max. Pit Slope (degrees) 45
    Capacity 150
    Capacity Units MT ORE/DAY
    Preprod. Stripping Vol. 0
    Unit Production Cost 13.56
    Units of Production $/MT ORE
    Operating Days per Year 260
    Operating Shifts per Day 1
    Year of Information 1984

Reference information

Bibliographic references

  • Deposit

    U.S. GEOLOGICAL SURVEY BULLETIN 922-P, 1940, P. 477-495.

  • Deposit

    OR. DEPT. GEOL. AND MIN. INDUST. BULLETIN 52, 1961,

  • Deposit

    P. 79-80.

  • Deposit

    OR. DEPT. GEOL. AND MIN. INDUST. BULLETIN 100, 1979,

  • Deposit

    PLATE 2, NO. 177-179.

Reporter information

Type Date Name Affiliation Comment
Reporter 20-AUG-92 Western Field Operations Center (WFOC) U.S. Bureau of Mines

Beyond USGS

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

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