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Mt Hamilton

Plant in White Pine county in Nevada, United States with commodities 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. Nearby scientific data
  8. Economic information about the deposit and operations
  9. Mining district
  10. Mineral rights holdings
  11. Land status
  12. Ownership information
  13. Production statistics
  14. Reserves and resources
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10247472
MAS/MILS ID 0320330523
Record type Site
Current site name Mt Hamilton
Alternate or previous names Seligman Pit, Nes Deposit, Centennial Deposit, Centennial Pit

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -115.55338, 39.27493 (WGS84)
Elevation 2100
Location accuracy 500(meters)

Site location context

Political divisions (FIPS codes)

White Pine(county)

Nevada(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Seligman Canyon(quadrangle 1:24,000 scale)

Mount Hamilton(quadrangle 1:100,000 scale)

Ely(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Little Smoky-Newark Valleys(hydrologic unit)

Central Nevada Desert Basins(hydrologic accounting unit)

Central Nevada Desert Basins(hydrologic subregion)

Great Basin(hydrologic region)

Federal lands

Humboldt-Toiyabe 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 Nevada White Pine

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 016 N 057 E 08 NWNWNW Nevada

Commodities

Commodity Importance
Gold Primary
Silver Secondary

Nearby scientific data

Main Entrance (1) Carbonate Shelf Sequence - Dolomite, limestone, and shale
ListMap

Economic information

Economic information about the deposit and operations

Operation type Surface
Development status Plant
Commodity type Metallic
Significant Yes
Discovery year 1865
Mining method Open Pit
Year of first production 1994
Plant type Leach
Milling method Heap Leach-Agglomerate-Carbon Column-Electrowin

Mining district

District name Seligman Canyon

Mineral rights holdings

Type of mineral rights Located Claim
Type of mineral rights Patented
Type of mineral rights Fee Ownership

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner Rea Gold Corp.
    Interest 100
    Home office Canada
    Year 1995
    First year 1993
  • Type Owner
    Owner Queenstake Resources Usa Ltd. (2.5% Npi)
    Year 1996
  • Type Owner
    Owner Cosatain Minerals (Retains A 2.0% Net Smelter Return)
    Year 1996
    Last year 1993
  • Type Owner-Operator
    Owner Westmont Gold, Inc.
    Year 1991
  • Type Operator
    Owner Mount Hamilton Mining Co.
    Home office Nevada
    Year 1996

Production statistics

  • Year 1995
    Description Planned Silver Production 193000 Tr Oz/Yr Silver
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Minor Silver Silver 6002971.83g
  • Year 1995
    Description Planned Gold Production 55000 Tr Oz/Yr Gold
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 1710691.45g
  • Year 1995
    Description Planned Ore Production 1179340 Mt/Yr Ore
  • Year 1996
    Description Gold Production Revised, Nov, 1996 30000 Tr Oz
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 933104.43g
  • Year 1996
    Description Gold Production-Seligman (Reported) 27100 Tr Oz
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 842904.33g
  • Year 1997
    Description Ore Production Increase, 1997 182000 Tonnes Per Month
  • Year 1997
    Accuracy Estimate
    Description Estimate Gold Production Seligman 25000 Tr Oz
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 777587.02g

Comments on the production information

  • 1997 PRODUCTION AT THE SELIGMAN MINE IS ESTIMATED TO BE 25,000 TR OZ/YR. RECORDS 096 & 094 FORM COMPANY ANNUAL REPORTS.

Reserves and resources

  • Type In-situ
    Estimate year 1995
    Measured 12000000g commodity
    Demonstrated 12000000g commodity
    Total resources 12000000g commodity
    Commodity Subtype Grade units Group Importance Year
    Gold Au 100 g/mt Gold Major 1995
  • Type In-situ
    Estimate year 1996
    Measured 8200951mt ore
    Demonstrated 8200951mt ore
    Total resources 8200951mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 1.78 g/mt Gold Major 1996
    Silver Ag 12.69 g/mt Silver Minor 1996
  • Type In-situ
    Estimate year 1996
    Measured 7620000mt ore
    Demonstrated 7620000mt ore
    Total resources 7620000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 1.61 g/mt Gold Major 1996
    Silver Ag 12.69 g/mt Silver Minor 1996
  • Type In-situ
    Estimate year 1996
    Demonstrated 7003466mt ore
    Total resources 7003466mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 1.2 g/mt Gold Major 1996
  • Type In-situ
    Estimate year 1997
    Measured 7487000mt ore
    Indicated 56000mt ore
    Demonstrated 7543000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 1.23 g/mt Gold Major 1997
    Silver Ag 8.65 g/mt Silver Minor 1997
  • Type In-situ
    Estimate year 1997
    Inferred 9742000mt ore
    Total resources 9742000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 1.19 g/mt Gold Major 1997
    Silver Ag 7.03 g/mt Silver Minor 1997
  • Type In-situ
    Estimate year 1997
    Measured 7487000mt ore
    Indicated 56000mt ore
    Demonstrated 7543000mt ore
    Inferred 9742000mt ore
    Total resources 17285000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 1.21 g/mt Gold Major 1997
    Silver Ag 7.74 g/mt Silver Minor 1997

Comments on the reserve resource information

  • TOTAL PROVEN + PROBABLE ORE RESERVES (NO MINERALIZED MATERIAL) AS OF 12/31/96:

Workings at the site

  • Type of workings Surface
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ACTUAL
    Mining Method OPEN PIT

Comments on other economic factors

  • OPERATION AT THE CENTENNIAL PIT (MINE) WILL COMMENCE IN DEC. 97 AT AN ANNUAL RATE OF 50,000 T OZ AU/YR.

Reference information

Bibliographic references

  • Geology

    RANDOL, MINES DIRECTORY, 1994/95, U.S. MINES & MINING

  • Geology

    COMPANIES, P338.

  • Production

    AMERICAN MINES HANDBOOK, 1996, P201.

  • Production

    REA GOLD CORPORATION 1996 ANNUAL REPORT, P12.

  • Production

    REA GOLD CORPORATION 1996 FORM 20-F REPORT, PP. 4, 16.

  • Deposit

    MINING RECORD, NOV 8, 1995, P 1

  • Ownership

    THE NORTHERN MINER VOL.70, #35, NOV 1, 1993, P3.

  • Reserve-Resource

    RANDOL, MINES DIRECTORY, 1996/97, U.S. MINES & MINING

  • Reserve-Resource

    COMPANIES, P 260.

  • Reserve-Resource

    THE MINING RECORD, VOL., 107, #49, 12/4/96, P15.

  • Reserve-Resource

    REA GOLD CORPORATION, 1996 FORM 20-F REPORT, PP. 15-16.

  • Deposit

    NEV. DIV. MINE INSPECTION, 1991, DIRECTORY OF NEVADA MINE

  • Deposit

    OPERATIONS ACTIVE DURING CALENDAR YEAR 1990, P. 92.

  • Deposit

    MAJOR MINES OF NEVADA 1995, MINERALS INDUSTRIES IN NEVADA'S

  • Deposit

    ECONOMY, THE NEVADA DIVISION OF MINERALS, NEVADA BUREAU

  • Deposit

    OF MINES AND GEOLOGOY SPE PUB P-7, P12, 13.

  • Deposit

    1995/96, NEVADA MINES DIRECTORY., PP. 17, 29.

  • Deposit

    MINING RECORD. "NEW OPERATING PLAN BEING PREPARED FOR THE

  • Deposit

    MT. HAMILTON GOLD MINE". V106/N16. 4/19/95. P.9.

  • Deposit

    REA GOLD NEWS RELEASE. "STARTUP OF CENTENNIAL DEFERRED AT

  • Deposit

    MT. HAMILTON". 11/15/96. 1P.

  • Deposit

    THE MINING RECORD, VOL., 107, #46, NOV., 13, 1996, P3.

  • Deposit

    THE MINING RECORD, VOL., 107, #49, DEC., 4, 1996, P15.

  • Deposit

    THE MINING RECORD, VOL., 108, #5, JAN 29, 1997, P3.

  • Deposit

    THE NORTHERN MINER, 4-21-97, P.11.

General comments

Subject category Comment text
Deposit THIS PROPERTY FILE INCLUDES THE SELIGMAN PIT (NES DEPOSIT), & THE CENTENNIAL DEPOSIT AND PIT: THE CENTENNIAL PIT WILL COME INTO PRODUCTION WHEN THE NES DEPOSIT (SELIGMAN PIT) IS DEPLETED SOME TIME IN MID-1997. NEW GOLD ZONE LOCATED IN THE SOUTHERN END OF THE BATTLE MOUNTAIN GOLD TREND 55 MILES EAST OF ELY, NV (1995)

Reporter information

Type Date Name Affiliation Comment
Reporter 10-OCT-97 Buckingham, David A. 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.