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Modarelli Mine

Past Producer in Eureka county in Nevada, United States with commodity Iron
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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. Production statistics
  16. Reserves and resources
  17. Workings at the site
  18. Links to other databases
  19. Bibliographic references
  20. General comments
  21. Reporter information

Geologic information

Identification information

Deposit ID 10246778
MRDS ID W016363
MAS/MILS ID 0320110028
Record type Site
Current site name Modarelli Mine
Alternate or previous names Requa Mine, Simplot Mine, Amarilla Deposit

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -116.26312, 40.36631 (WGS84)
Elevation 2067
Location accuracy 100(meters)

Site location context

Political divisions (FIPS codes)

Eureka(county)

Nevada(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Thatcher Spring(quadrangle 1:24,000 scale)

Crescent Valley(quadrangle 1:100,000 scale)

Winnemucca(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Pine(hydrologic unit)

Humboldt(hydrologic accounting unit)

Black Rock Desert-Humboldt(hydrologic subregion)

Great Basin(hydrologic region)

Geographic areas

Country State County
United States Nevada Eureka

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 029 N 051 E 30 S2SWNE Nevada

Commodities

Commodity Importance
Iron Primary

Materials information

Materials Type of material
Apatite Unknown
Calcite Unknown
Hematite Unknown
Magnetite Unknown
Quartz Unknown

Nearby scientific data

Ore Body (1) -116.26312, 40.36631
ListMap

Economic information

Ore body information

  • Strike N45W
    Dip 60N
    Thickness 88M
    Length 427M
    Width 91M
    Area 82HA
    Depth to top 0M
    Field Value
    Type of Orebody #1 REPLACEMENT
    Shape of Orebody #1 IRREGULAR
    Type of Orebody #2 STOCKWORK
    Primary mode of Origin CONT METASOMATIC
    Primary Ore Control FAULTING
    Degree of Wallrock Alter. INTENSE
    Type of Wallrock Alter. #1 ADV ARGILLIC
    Strike And Dip N45W:60N
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 0
    Min. Thick. Unconsol. Mat. 0
    Total Surface Area (HA) 82
    Date of Last Modification 830421

Economic information about the deposit and operations

Operation type Surface
Development status Past Producer
Commodity type Metallic
Significant Yes
Discovery year 1903
Year of first production 1951

Mining district

District name Modarelli-Frenchie Creek District

Mineral rights holdings

Type of mineral rights Patented
Type of mineral rights Located Claim

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner Linda And Vincent Modarelli
    Interest 100
    Home office Nevada
    Year 1981
  • Type Owner-Operator
    Owner J. R. Simplot Co.
    Home office Idaho
    Year 1981

Production statistics

  • Year 1951
    Description Crude Production 94943 Metric Tons Ore/Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Iron Iron 94943mt
  • Year 1952
    Description Crude Production 172041 Metric Tons Ore/Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Iron Iron 172041mt
  • Year 1955
    Description Crude Production 92816 Metric Tons Ore/Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Iron Iron 92816mt
  • Year 1956
    Description Crude Production 20539 Metric Tons Ore/Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Iron Iron 20539mt
  • Year 1959
    Description Crude Production 11400 Metric Tons Ore/Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Iron Iron 11400mt

Comments on the production information

  • PAST PRODUCTION: 406000 T MINED FROM 1951-1959.

Reserves and resources

  • Type In-situ
    Estimate year 1971
    Indicated 40000000mt ore
    Demonstrated 40000000mt ore
    Total resources 40000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Phosphorus-Phosphates P 1.05 wt-pct Phosphorus 1971
    Iron Fe 42.75 wt-pct Iron Major 1971
  • Type In-situ
    Estimate year 1971
    Indicated 44700000mt ore
    Demonstrated 44700000mt ore
    Total resources 44700000mt ore
    Commodity Subtype Grade units Group Importance Year
    Iron Fe2O3 42.75 wt-pct Iron Major 1971

Comments on the reserve resource information

  • OPERATOR: SIMPLOT MINING CO. OTHER NAMES: AMARILLA DEPOSIT, REQUA MINE, SIMPLOT MINE.

Workings at the site

  • Type of workings Surface
    Area 28HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method OPEN PIT
    Percent Waste Rock 37.8
    Avg. Overburden Thickness 42
    Primary Material Cover SAND, GRAVEL
    Secondary Material Cover M-HARD ROCKS
    Hardness of Ore HARD ROCKS
    Avg. Bench Height (meters) 6
    Max. Pit Slope (degrees) 45
    Capacity 6720
    Capacity Units MT ORE/DAY
    Preprod. Stripping Vol. 0
    Unit Production Cost 4.11
    Units of Production $/MT ORE
    Operating Days per Year 250
    Operating Shifts per Day 2
    Year of Information 1981

Reference information

Bibliographic references

  • Geology

    MUFFLER, L.J. PATRICK, 1964, GEOLOGY OF THE FRENCHIE

  • Geology

    CREEK QUADRANGLE NORTH-CENTRAL NEVADA. U.S. GEOLOGICAL

  • Geology

    SURVEY BULLETIN 1179, 99 PP.

  • Deposit

    JONES, G. K., 1979, IRON ORE PELLETIZATION. INDUSTRIAL

  • Deposit

    MINERALS, MARCH 1979, PP. 61-63, 65, 67-69, 71-73.

General comments

Subject category Comment text
Deposit GENERAL LOCATION: ABOUT 39 KM S OF CARLIN GENERAL SIZE OF ORE BODY: MEDIUM

Reporter information

Type Date Name Affiliation Comment
Reporter 07-OCT-96 Spear, James M. U.S. Bureau of Mines

Beyond USGS

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

External references

Maps centered on this site

Authoritative Nevada resources

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