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  3. Mineral Resource Data System (MRDS)

French Hill Mine

Past Producer in Del Norte county in California, 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. Mineral rights holdings
  13. Land status
  14. Ownership information
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. Reporter information

Geologic information

Identification information

Deposit ID 10235161
MRDS ID W017820
MAS/MILS ID 0060150004
Record type Site
Current site name French Hill Mine
Alternate or previous names Tyson Chrome Mine

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -123.98866, 41.80672 (WGS84)
Location accuracy 100(meters)

Site location context

Political divisions (FIPS codes)

Del Norte(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Gasquet(quadrangle 1:24,000 scale)

Happy Camp(quadrangle 1:100,000 scale)

Weed(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Smith(hydrologic unit)

Northern California Coastal(hydrologic accounting unit)

Klamath-Northern California Coastal(hydrologic subregion)

California(hydrologic region)

Federal lands

Six Rivers National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States California Del Norte

Public Land Survey System information

Meridian Township Range Section Fraction State
Humboldt 016 N 002 E 06 NE California

Commodities

Commodity Importance
Chromium Critical Tertiary

Materials information

Materials Type of material
Chromite Unknown
Olivine Unknown
Serpentine Unknown

Nearby scientific data

Main Entrance (1) -123.98866, 41.80672
ListMap

Economic information

Ore body information

  • Thickness 9999M
    Length 999999M
    Width 999999M
    Area 64HA
    Depth to top 0M
    Field Value
    Type of Orebody #1 FISSURE VEIN
    Shape of Orebody #1 TABULAR
    Type of Orebody #2 SHEAR ZONE
    Shape of Orebody #2 IRREGULAR
    Type of Orebody #3 DISSEMINATED
    Primary mode of Origin MAGMATIC DIFFER
    Primary Ore Control LITHOLOGY
    Degree of Wallrock Alter. INTENSE
    Type of Wallrock Alter. #1 CARBONITIZATION
    Type of Wallrock Alter. #2 SILICIFICATION
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 0
    Min. Thick. Unconsol. Mat. 0
    Total Surface Area (HA) 64
    Date of Last Modification 830316

Economic information about the deposit and operations

Operation type Surface-Underground
Development status Past Producer
Commodity type Metallic
Significant No
Discovery year 1886
Year of first production 1917

Mining district

District name Gasquet

Mineral rights holdings

Type of mineral rights Located Claim
Type of mineral rights Patented

Land status

Ownership category National Forest

Ownership information

  • Type Owner-Operator
    Owner Tyson Chrome Mines Ltd.
    Home office California
    Year 1975

Comments on the reserve resource information

  • MATRIX-ARBITRARILY ASSIGNED SMALLTONNAGE OF ORE-AMT LEFT IN SMALL & INDETERMINABLE -COSTING NOT APPLICABLE TO SUCH SMAL T OF ORE LEFT IN MINE :NON-RECOVERABLE IRON CONTENT COMPUTED CR/FE RATIO OF 2.5:1 ANALYSIS BY CDMG IN 1976 GAVE FOLLOWING PERCENTAGES-MASSIVE 2 04.34,CR2O3 47.50,FEO 12.15,TOTAL FE 14.47,AL203 14.65,MGO CR/FE 2.89.

Workings at the site

  • Type of workings Surface
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Swell Factor .6
    Hardness of Ore M-HARD ROCKS
    Avg. Bench Height (meters) 40
    Max. Pit Slope (degrees) 45
    Capacity Units MT ORE/DAY
    Units of Production $/MT ORE
    Year of Information 1975
  • Type of workings Underground
    Overall depth 38M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method FILLED STOPES
    Swell Factor .6
    Hardness of Rock HARDROCK FISSURED WITH MODERATE WATER
    Rock Characteristics NO PLANES OF WEAKNESS
    Rock Support Chars. SUPPORTING MAY BACK SLAB
    Mine Support Chars. POST, HEADBOARD, CAPS, ROOF BOLTS
    Number of Shafts 1
    Capacity Units MT ORE/DAY
    Units of Production $/MT ORE
    Operating Days per Year 250
    Operating Shifts per Day 1
    Year of Information 1975

Reference information

Bibliographic references

  • Deposit

    USBM WAR MIN.RPT387-FRENCH HILL MINE,1945 12PP

  • Deposit

    CDM&G BULL 134,1946 PT1 CHAP1 DELNORTE CO WELLS,CATER&RYNEAR

  • Deposit

    USBM RI4365-INVEST OF FRENCH HILLCHROMITE MINE-SANBORN&RICKE

  • Deposit

    CAJOUR MINES&GEOL VOL.48;J C OBRIEN 1952 PP261-309 MINESOFDE

  • Deposit

    WIELBELT,F J 1955,ONPUB SUPP REPT.,FRENCH HILL CHROMITE MINE

Reporter information

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

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.