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Mayflower Chrome Mine

Past Producer in Calaveras county in California, United States with commodities Chromium, Iron
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Geologic information

Identification information

Deposit ID 10162552
MRDS ID M004641
MAS/MILS ID 0060090562
Record type Site
Current site name Mayflower Chrome Mine
Alternate or previous names Burnham and Wilson
Related records 10027954

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -120.5582, 37.95851 (WGS84)
Elevation 332
Location accuracy 10(meters)
(click for info)

Geographic areas

Country State County
United States California Calaveras

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 001 N 013 E 09 E2NWNW California

Commodities

Commodity Importance
Chromium Tertiary
Iron Tertiary

Materials information

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

Nearby scientific data

Main Entrance (1) -120.5582, 37.95851
ListMap

Ore body information

  • Strike N30W
    Dip 90N
    Thickness 3M
    Depth to top 0M
    Width 10M
    Length 30M
    Area 1HA
    Field Value
    Type of Orebody #1 DISSEMINATED
    Shape of Orebody #1 TABULAR
    Shape of Orebody #2 LENTICULAR
    Primary mode of Origin MAGMATIC DIFFER
    Primary Ore Control LITHOLOGY
    Degree of Wallrock Alter. INTENSE
    Type of Wallrock Alter. #1 CARBONITIZATION
    Strike And Dip N30W
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 0
    Min. Thick. Unconsol. Mat. 0
    Total Surface Area (HA) 1
    Date of Last Modification 820226

Economic information

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 1916

Mining district

District name French Creek District

Mineral rights holdings

Type of mineral rights Fee Ownership

Land status

Ownership category Federal

Ownership information

  • Type Owner-Operator
    Owner Gillis, C. A.
    Home office California
    Year 1976
    First year 1941
  • Type Owner
    Owner U.S. Bureau Of Land Management - Sacramento Office
    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
    Swell Factor .6
    Avg. Overburden Thickness 0
    Primary Material Cover M-HARD ROCKS
    Percentage 100
  • Type of workings Underground
    Overall depth 5M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Mining Method GOPHERING (COYOTING) 10-29
    Swell Factor .6
    Hardness of Rock SOFT NONPLASTIC WITH LITTLE WATER
    Rock Characteristics MULTIPLE SYSTEMS OF WEAKNESS PLANES
    Rock Support Chars. UNSUPPORTING NO FLOW
    Mine Support Chars. TIMBER W/LAGGING CONCRETE-UNREINFOR
    Number of Shafts 1
    Avg. Length of Adits (m) 30
    Number of Adits 1

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
U.S. Bureau of Mines Minerals Availability System MAS 0060090562
USGS Mineral Resources Data System MRDS M004641 MAS references MRDS

Bibliographic references

  • Deposit

    CALIF B 134,PT 3,CH 2,P 42 & PL 5;B 76,P 121;B 145 ,PL 2;REP

  • Deposit

    165;CALIF COUNTY REPT NO 2,P 22, 129 & PL D

General comments

Subject category Comment text
Deposit CATER (1948) STATES THAT ORE WAS 48 PERCENT CR2O3. MINE VISTED SEPT 16,1975. APPROX-IMATELY 667 LONG TONS OF OR CED. THE AVERAGE MINABLE GRADE OF CHROMITE IS 48 PERCENT & IS 11 PERCENT. INSUFFICIENT DATA FOR MATRIX CALCULATIONS. ANALYSIS BY CDMG IN 1976 GAVE FOLLOWING PERCENTAGES-DISSEMIN E=S102 03.16, CR2O3 51.16, FEO 13.77, TOTAL FE 15.44, AL203 13.2 3.27, CR/FE 2.92.

Reporter information

Type Date Name Affiliation Comment
Reporter 05-NOV-1984 Unknown U.S. Bureau of Mines