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Lyon Deposit

Occurrence in Lyon county in Nevada, United States with commodities Copper, Gold, Silver
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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. Reserves and resources
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10295101
MAS/MILS ID 0320190172
Record type Site
Current site name Lyon Deposit
Alternate or previous names Pumpkin Hollow A Portion Only

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -119.04238, 38.92821 (WGS84)
Elevation 1450
Location accuracy 500(meters)

Site location context

Political divisions (FIPS codes)

Lyon(county)

Nevada(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Yerington NE(quadrangle 1:24,000 scale)

Smith Valley(quadrangle 1:100,000 scale)

Walker Lake(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Walker(hydrologic unit)

Walker(hydrologic accounting unit)

Central Lahontan(hydrologic subregion)

Great Basin(hydrologic region)

Geographic areas

Country State County
United States Nevada Lyon

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 012 N 026 E 02 Nevada

Commodities

Commodity Importance
Copper Primary
Gold Secondary
Silver Secondary

Materials information

Materials Type of material
Calcite Unknown
Chalcopyrite Unknown
Chlorite Unknown
Epidote Unknown
Magnetite Unknown
Quartz Unknown
Serpentine Unknown
Talc Unknown

Nearby scientific data

Ore Body (1) -119.04238, 38.92821
ListMap

Economic information

Ore body information

  • Strike N45E
    Dip 68N
    Thickness 20M
    Length 304M
    Width 579M
    Depth to top 564M
    Field Value
    MAS Matrix # 1
    MAS Column # 3
    Type of Orebody #1 REPLACEMENT
    Shape of Orebody #1 TABULAR
    Type of Orebody #2 STRATABOUND
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control CONTACT ZONE
    Secondary Ore Control FAULTING
    Degree of Wallrock Alter. INTENSE
    Strike And Dip N45E:68N
    Minimum Depth to Top 274
    Avg. Thick. Unconsol. Mat. 275
    Min. Thick. Unconsol. Mat. 220
    Date of Last Modification 860224
  • Strike N75W
    Dip 01N
    Thickness 245M
    Length 600M
    Width 245M
    Depth to top 610M
    Field Value
    MAS Matrix # 1
    MAS Column # 4
    Type of Orebody #1 REPLACEMENT
    Shape of Orebody #1 TABULAR
    Type of Orebody #2 STRATABOUND
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control CONTACT ZONE
    Secondary Ore Control FAULTING
    Degree of Wallrock Alter. INTENSE
    Strike And Dip N75W:01N
    Minimum Depth to Top 610
    Avg. Thick. Unconsol. Mat. 275
    Min. Thick. Unconsol. Mat. 220
    Date of Last Modification 860224
  • Area 632HA
    Field Value
    Total Surface Area (HA) 632
    Date of Last Modification 910418

Economic information about the deposit and operations

Operation type Surface
Development status Occurrence
Commodity type Metallic
Significant No
Discovery year 1960
Mining method Open Stope - Room and Pillar
Milling method Flotation

Mining district

District name Yerington

Mineral rights holdings

Type of mineral rights Located Claim

Land status

Ownership category BLM Administrative Area

Ownership information

  • Type Owner
    Owner Plexus Resources Corp.
    Interest 100
    Home office Utah
    Year 1985

Comments on the production information

  • NO PREVIOUS PRODUCTION

Reserves and resources

  • Type In-situ
    Estimate year 1985
    Indicated 26300000mt ore
    Demonstrated 26300000mt ore
    Total resources 26300000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 1.1 wt-pct Copper Major 1985
    Gold Au 0.514 g/mt Gold Minor 1985
    Silver Ag 8.5729 g/mt Silver Minor 1985
  • Type In-situ
    Estimate year 1985
    Measured 7532000mt ore
    Demonstrated 7532000mt ore
    Total resources 7532000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 3.1 wt-pct Copper Major 1985
    Gold Au 0.514 g/mt Gold Minor 1985
    Silver Ag 8.5729 g/mt Silver Minor 1985

Comments on the reserve resource information

  • NO INFERRED RESOURCE WAS CONSIDERED BY THE COMPANY. CALCULATIONS FOR THIS MATERIAL ARE NOT AVAILABLE. M1C1=M1C3+M1C4

Workings at the site

  • Type of workings Underground
    Length 2618M
    Overall depth 915M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method OTHER OPEN STOPE METHODS
    Swell Factor .57
    Percent Waste Rock 0
    Percent Recovery 100
    Hardness of Rock HARDROCK WITH LITTLE WATER
    Rock Characteristics MULTIPLE SYSTEMS OF WEAKNESS PLANES
    Rock Support Chars. SUPPORTING
    Mine Support Chars. POST, HEADBOARD, CAPS, ROOF BOLTS
    Number of Shafts 1
    Length of Inclines (m) 538
    Slope of Inclines 80
    Number of Inclines 3
    Avg. Length of Adits (m) 238
    Number of Adits 10
    1st Condition of Workings NO MINE ENTRY
    Capacity 1904
    Capacity Units MT ORE/DAY
    Unit Production Cost 13.59
    Units of Production $/MT ORE
    Operating Days per Year 250
    Operating Shifts per Day 2
    Year of Information 1985
  • Type of workings Underground
    Length 8119M
    Overall depth 915M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 2
    Status of Mining Method PROPOSED
    Mining Method OTHER OPEN STOPE METHODS
    Swell Factor .57
    Percent Waste Rock 0
    Percent Recovery 100
    Hardness of Rock HARDROCK WITH LITTLE WATER
    Rock Characteristics MULTIPLE SYSTEMS OF WEAKNESS PLANES
    Rock Support Chars. SUPPORTING
    Mine Support Chars. POST, HEADBOARD, CAPS, ROOF BOLTS
    Number of Shafts 1
    Length of Inclines (m) 538
    Slope of Inclines 80
    Number of Inclines 3
    Avg. Length of Adits (m) 248
    Number of Adits 18
    1st Condition of Workings NO MINE ENTRY
    Capacity 3175
    Capacity Units MT ORE/DAY
    Unit Production Cost 10.02
    Units of Production $/MT ORE
    Operating Days per Year 250
    Operating Shifts per Day 2
    Year of Information 1985
  • Type of workings Underground
    Length 14334M
    Overall depth 915M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 3
    Status of Mining Method PROPOSED
    Mining Method ROOM AND PILLAR 10-34
    Swell Factor .57
    Percent Waste Rock 10
    Percent Recovery 100
    Hardness of Rock HARDROCK WITH LITTLE WATER
    Rock Characteristics MULTIPLE SYSTEMS OF WEAKNESS PLANES
    Rock Support Chars. SUPPORTING
    Mine Support Chars. POST, HEADBOARD, CAPS, ROOF BOLTS
    Number of Shafts 1
    Length of Inclines (m) 578
    Slope of Inclines 4
    Number of Inclines 80
    Avg. Length of Adits (m) 267
    Number of Adits 40
    1st Condition of Workings NO MINE ENTRY
    Capacity 3175
    Capacity Units MT ORE/DAY
    Unit Production Cost 8.35
    Units of Production $/MT ORE
    Operating Days per Year 250
    Operating Shifts per Day 2
    Year of Information 1985

Comments on other economic factors

  • ORE IS MILLED ON SITE, THEN TRUCKED 40 KM TO THE SOUTHERN PACIFIC RALHEAD AT WABUSKA NEVADA, THEN RAIL HAULED TO HAYDEN, AZ. FOR SMELTING.
  • UNDERGROUND DEVELOPMENT RECORDS ARE CUMMULATIVE; RECORD 1 DENOTES INITIAL MINING OF E-2 ZONE; RECORD 2 DENOTES FULL CAPACITY MINING OF THE E-2 ZONE; RECORD 3 DENOTES FULL PRODUCTION AT THE EAST ZONE TO END OF THE OPERATION.

Reference information

Bibliographic references

  • Deposit

    DILLES, J. H. THE PETROLOGY AND GEOCHEMISTRY OF THE

  • Deposit

    YERINGTON BATHOLITH AND THE ANN MASON PORPHYRY COPPER

  • Deposit

    DEPOSIT, WESTERN NEVADA. PH.D. THESIS, STANFORD UNIV. CA,

  • Deposit

    1983, 389 PP.

  • Deposit

    GALE, G.D. METALLURGICAL ENGINEER, WESTERN FIELD

  • Deposit

    OPERATIONS CENTER. MINERALS AVAILABILITY SYSTEM REP. ON THE

  • Deposit

    MARGARET PROJECT, 1980.

  • Deposit

    GEOLOGICAL SOCIETY OF AMERICA. 36TH ANNUAL MEETING-

  • Deposit

    ROCKY MOUNTAIN SECTION, 79TH ANNUAL MEETING-CORDILLERAN

  • Deposit

    SECTION. GEOL. SOC. AMERICA, V. 15, NO. 5, 1983, P. 277.

  • Deposit

    GEOLOGICAL SOCIETY OF NEVADA. NOVEMBER 1982 MEETING,

  • Deposit

    GEOLOGY OF THE PUMPKIN HOLLOW COPPER MAGNETITE SKARN

  • Deposit

    DEPOSITS, NOV. 1982.

  • Deposit

    NEVADA BUREAU OF MINES. GEOLOGY AND MINERAL DEPOSITS

  • Deposit

    OF LYON, DOUGLAS, AND ORMSBY COUNTIES, NEVADA. UNIV. NV.

  • Deposit

    BUREAU OF MINES BULL. 75, PP. 6-7, 26-28.

  • Deposit

    PLEXUS RESOURCES CORP. ANNUAL REPORTS, 1984-85.

  • Deposit

    PROFFETT, J.M. JR., AND J.H. DILLES. GEOLOGIC MAP OF

  • Deposit

    THE YERINGTON DISTRICT, NEVADA. NV BUREAU OF MINES AND GEOL

  • Deposit

    MAP NO. 77, 1984.

  • Deposit

    SECURITY AND EXCHANGE COMMISSION. FORM 2-14, 1976,

  • Deposit

    PP. 60,67.

  • Deposit

    SMITH, M.R. LECTURE FROM SKARN DEPOSIT FIELD TRIP.

  • Deposit

    SYMPOSIUM OF THE ASSOCIATION OF EXPLORATION GEOCHEMISTS,

  • Deposit

    EXPLORATION FOR ORE DEPOSITS OF THE NORTH AMERICAN

  • Deposit

    CORDILLERA. MAR. 25-28, 1984.

  • Deposit

    U.S. DEPARTMENT OF COMMERCE NATIONAL - OCEANIC AND

  • Deposit

    ATMOSPHERIC ADMINISTRATION. MONTHLY NORMALS OF TEMPERATURE,

  • Deposit

    PRECIPITATION, AND HEATING AND COOLING DEGREE DAYS, 1941-70.

  • Deposit

    1973, 10 PP.

  • Deposit

    WEST, C. COMPANY OFFICIAL, PLEXUS RESOURCES CORP.

  • Deposit

    PERSONAL COMMUNICATION, 1985.

  • Deposit

    WORLD MINING. YERINGTON DISTRICT WILL BE A MAJOR

  • Deposit

    FUTURE PORPHYRY COPPER PRODUCER. MAR. 1976, P. 82.

  • Deposit

    WORLD MINING. ANACONDA-ATLANTIC RICHFIELD MUST DIVEST

  • Deposit

    CU RESERVES. MAY 1979, P. 65.

General comments

Subject category Comment text
Deposit NOT INCLUDED IN THE 1978 SUPPLY ANALYSIS. RESOURCES: 7.5 MILLION @ 3.1% CU, 8.6 GM AG, & 0.5 GM AU 26.3 MILLION @ 1.1% CU (SURROUNDING ABOVE) PLEXUS RESOURCES CORP., 1984 AR; AMERICAN MINES HANDBOOK, 1989, P145.

Reporter information

Type Date Name Affiliation Comment
Reporter 03-FEB-1997 Sweeney, Thomas M. 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 Nevada resources

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