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DeLamar Mining Co., Sommercamp Adit No. 2

Past Producer in Owyhee county in Idaho, United States with commodities Gold, Silver, Antimony
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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. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Mineral rights holdings
  16. Land status
  17. Ownership information
  18. Production statistics
  19. Reserves and resources
  20. Workings at the site
  21. Links to other databases
  22. Bibliographic references
  23. Reporter information

Geologic information

Identification information

Deposit ID 10217678
MRDS ID M060187
MAS/MILS ID 0160730056
Record type Site
Current site name DeLamar Mining Co., Sommercamp Adit No. 2
Alternate or previous names Delamar Silver Mine and Mill, Sommercamp Pit, Wahl, Voschay, Wahl Tunnel, Delamar, Delamar Silver Mine, Delamar Silver/Gold Mine, South Wahl, Florida Mountain, Silver City, Glen Silver

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -116.83347, 43.01348 (WGS84)
Elevation 2207
Location accuracy 100(meters)
Relative position 1.6 Km W Of Silver City; 27 Km E Of Jordan Valley

Site location context

Political divisions (FIPS codes)

Owyhee(county)

Idaho(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

De Lamar(quadrangle 1:24,000 scale)

Murphy(quadrangle 1:100,000 scale)

Boise(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Jordan(hydrologic unit)

Middle Snake-Boise(hydrologic accounting unit)

Middle Snake(hydrologic subregion)

Pacific Northwest(hydrologic region)

Geographic areas

Country State County
United States Idaho Owyhee

Public Land Survey System information

Meridian Township Range Section Fraction State
Boise 005 S 004 W 04,05,06,07,08,09 Idaho

Comments on the location information

  • CLAIM GROUP EXTENDS A MI FROM JORDAN CREEK ACROSS CREST OF DELAMAR MTN.

Commodities

Commodity Importance
Gold Secondary
Silver Primary
Antimony Critical Tertiary

Materials information

Materials Type of material
Gold Ore
Silver Ore
Argentite Ore
Cerargyrite Ore
Electrum Ore
Jamesonite Ore
Miargyrite Ore
Naumannite Ore
Polybasite Ore
Proustite Ore
Pyrargyrite Ore
Beidellite Gangue
Marcasite Gangue
Pyrite Gangue

Mineral occurrence model information

Model code 104
USGS model code 25a
Deposit model name Hot-spring Au-Ag
Mark3 model number 45

Host and associated rocks

  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite
    Rock type qualifier Rhyolite Quartz Porphyry
    Stratigraphic age (youngest) Miocene
  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granodiorite
    Rock type qualifier Granodiorite Pluton
    Stratigraphic age (youngest) Cretaceous
  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Mafic Volcanic Rock > Basalt
    Rock type qualifier Basaltic Flows
    Stratigraphic age (youngest) Miocene
  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Pyroclastic Rock > Tuff > Ash-Flow Tuff
    Stratigraphic age (youngest) Miocene

Nearby scientific data

Ore Body (1) -116.83347, 43.01348
ListMap

Economic information

Ore body information

  • Name Delamar
    General form POD/LENS
    Dip 0-30 DEGREES
    Thickness 152.4M
    Length 426.72M
    Width 304.8M

Controls for ore emplacement

  • Fissuring
  • Fracturing
  • Faulting

Comments on the geologic information

  • PRIMARY MINERALS CONSIST OF NANMANNITE (AG2SE), ARGENTITE, CERARGYRITE, NATIVE SILVER, AND ARGENTOJAROSITE. THERE IS A SMALL AMOUNT OF FREE GOLD PRESENT.
  • THE USUAL ORE CONSISTS OF FINELY DIVIDED NATIVE GOLD, LESS THAN 1% PYRITE, AND RICH SILVER MINERALS WHICH IN PLACES REPLACE CLAYEY SERICITE.

Economic information about the deposit and operations

Operation type Surface
Development status Past Producer
Commodity type Metallic
Deposit size Large
Significant Yes
Discovery year 1863
Mining method Open Pit
Year of first production 1863
Plant type Leach
Plant subcategory Hydromet
Milling method Heap Leach-Agglomerate-Merrill-Crowe

Mining district

District name Delamar District

Mineral rights holdings

Type of mineral rights Patented
Type of mineral rights Located Claim

Land status

Ownership category Private

Ownership information

  • Type Owner-Operator
    Owner Kinross Gold Corp.
    Interest 100
    Home office Canada
    Year 1997
    First year 1995
  • Type Owner-Operator
    Owner Nerco, Inc.
    Interest 100
    Home office Oregon
    Year 1986
    First year 1986
    Last year 1995
  • Type Owner
    Owner Mapco Minerals Corp.
    Interest 52.2
    Year 1983
    First year 1983
    Last year 1986
  • Type Owner
    Owner Superior Oil Co.
    Interest 47.5
    Home office Texas
    Year 1978
    First year 1978
    Last year 1986
  • Type Owner-Operator
    Owner Earth Resources Co.
    Home office Texas
    Year 1978
    First year 1978
    Last year 1986
  • Type Owner
    Owner Canadian Superior Mining (Us), Ltd.
    Home office Canada
    Year 1978
    First year 1978
  • Type Owner-Operator
    Owner Delamar Mining Co., Ltd.
    Interest 100
    Home office United Kingdom
    Year 1900

Production statistics

  • Year 1978
    Material ore mined
    Ore mined 552000mt
    Description Ore Mined 552000 Metric Tons
  • Year 1979
    Material ore mined
    Ore mined 730000mt
    Description Ore Mined 730000 Metric Tons
  • Year 1980
    Material ore mined
    Ore mined 680000mt
    Description Ore Mined 680000 Metric Tons
  • Year 1981
    Material ore mined
    Ore mined 699450mt
    Description Ore Mined 699450 Metric Tons/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Silver Silver 46445900g
  • Year 1982
    Material ore mined
    Ore mined 674940mt
    Description Ore Mined 674940 Metric Tons/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Silver Silver 50901000g
  • Year 1983
    Material ore mined
    Ore mined 767470mt
    Description Ore Mined 767470 Metric Ton/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Silver Silver 45075200g
  • Year 1984
    Material ore mined
    Ore mined 710790mt
    Description Ore Mined 710790 Metric Tons/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Silver Silver 53243000g
    Minor Gold Gold 895065g
  • Year 1994
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Silver Silver 58276000g
  • Year 1995
    Description Silver 1805000 T Oz
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Silver Silver 56141776g
  • Year 1996
    Material Kinross 1997 AR, p. 12.
    Ore mined 1260101mt
    Description Ore Mined 1260101 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Silver Silver 36700000g
    Secondary Gold Gold 1364900g
  • Year 1997
    Material Kinross 1997 AR, p. 12.
    Ore mined 1315431mt
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Silver Silver 3928400g 43g/mt
    Secondary Gold Gold 1420700g 1g/mt

Comments on the production information

  • 1995: STRIPPING RATIO = 4.2 MT WASTE:1 MT ORE. METALLURGICAL RECOVERIES = 93% FOR AU; 78% FOR AG.

Reserves and resources

  • Type In-situ
    Estimate year 1984
    Measured 9072000mt ore
    Demonstrated 9072000mt ore
    Total resources 9072000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 0.823 g/mt Gold Minor 1984
    Silver Ag 68.5999 g/mt Silver Major 1984
  • Type In-situ
    Estimate year 1991
    Demonstrated 38000000mt ore
    Total resources 38000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 0.857 g/mt Gold Minor 1991
    Silver Ag 32.81 g/mt Silver Major 1991
  • Type In-situ
    Estimate year 1996
    Demonstrated 9170000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 1.27 g/mt Gold Minor 1996
    Silver Ag 35.71 g/mt Silver Major 1996
  • Type In-situ
    Estimate year 1996
    Inferred 2451000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 1.63 g/mt Gold Minor 1996
    Silver Ag 33.59 g/mt Silver Major 1996
  • Type In-situ
    Estimate year 1996
    Total resources 11621000mt ore
    Commodity Subtype Grade units Group Importance Year
    Silver Ag 35.26 g/mt Silver Major 1996
    Gold Au 1.35 g/mt Gold Minor 1996

Comments on the reserve resource information

  • 1995 RESERVES ARE "IN PLACE, MINEABLE, PARTIALLY DILUTED, METALLURGICAL RECOVERY NOT APPLIED. MILL ORE CUTOFF - DELAMAR 86 G/T SILVER EQIVALENT - STONE CABIN 0.99 G/T GOLD EQUIVALENT. LOW GRADE CUTOFF - DELAMAR 62 G/T SILVER EQUIVALENT." FROM FORM 40-F, 12/31/96, P. 12.

Workings at the site

  • Type of workings Surface
    Length 35052M
    Width 274.32M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ESTIMATE
    Mining Method OPEN PIT
    Percent Waste Rock 99.9
    Capacity 2000
    Capacity Units MT ORE/DAY
    Unit Production Cost 8.27
    Units of Production $/MT ORE
    Operating Days per Year 250
    Operating Shifts per Day 2
    Year of Information 1983

Comments on the workings information

  • OPEN PIT MINE DEVELOPED IN 1976

Comments on development

  • PROPERTY COVERS 9169 ACRES, INCLUDES 374 CLAIMS ; TOTAL$: 19.8 ; MILL.CAP: 620.5 TONS ; ECON.YEAR: 1976 ; ECON.COM: 1976 ESTIMATED MINING RATE OF 5.5 MILLION TONS/YEAR THAT WOULD INCLUDE 2.5 MILLION OZ REFINED SILVER AND GOLD

Reference information

Bibliographic references

  • Reserve-Resource

    MINEABLE RESERVES AS OF DEC. 31, 1984 (FROM NERCO, INC. 1984 10-K P.9)

  • Deposit

    BELL, R.N., 1908, NINTH ANNUAL REPORT OF THE MINING INDUSTRY OF IDAHO FOR THE YEAR 1907: OFFICE OF INSPECTOR OF MINES, BOISE, IDAHO, P. 141-144.

  • Deposit

    ENG. MINING JOUR., 1920 , REOPENING OF OLD DELAMAR MINE UNDERWAY: ENG. MINING JOUR., V. 110 , NO. 11 , P. 538 - 539 .

  • Reserve-Resource

    NERCO, INC. 1984 FORM 10-K, P. 9.

  • Deposit

    SPOKANE CHRONICLE, OCT. 21 , 1974 ; MAR. 23 , 1976 ; DEC. 6 , 1976 ; AP. 5 , 1977 ; AP. 27 , 1977

  • Reserve-Resource

    1994 KINROSS ANNUAL REPORT.

  • Deposit

    1897 GEOLMAP LINDGREN, WALDEMAR, 20TH ANNUAL RPT.

  • Reserve-Resource

    KINROSS GOLD CORPORATION, FORM 40-F. DEC. 31. 1995. P4.

  • Deposit

    1926 GEOLMAP IDAHO BUR MINES AND GEOLOGY BULL 11

  • Reserve-Resource

    4/97 - KINROSS GOLD'S 1996 AR, P. 21.

  • Deposit

    1966 DIREXPL CONTINENTAL MATERIALS CORP - DDH

  • Deposit

    LINDGREN, WALDEMAR. THE GOLD AND SILVER VEINS OF SILVER CITY, DE LAMAR, AND OTHER MINING DISTRICTS OF IDAHO: U. S. GEOLOGICAL SURVEY TWENTIETH ANNUAL REPORT, 1900, VOL. 3, CHAPT. III, P. 122-129.

  • Deposit

    PIPER, A. W., AND LANEY. F. B. GEOLOGY AND METALLIFEROUS RESOURCES OF THE REGION ABOUT SILVER CITY, IDAHO: IDAHO BUREAU OF MINES AND GEOL. BULLETIN 11, 1926.

  • Deposit

    ASHER, R. R. GEOLOGY AND MINERAL RESOURCES OF A PORTION OF THE SILVER CITY REGION, OWYHEE COUNTY, IDAHO: IDAHO BUREAU OF MINES AND GEOL. PAMPHLET 138, 1968, 106 P.

  • Deposit

    SAVAGE, C. N., AND OTHERS. DEVELOPMENTS IN MINERALS, MINING, AND ENERGY RESOURCES IN IDAHO FOR 1977: IDAHO BUREAU OF MINES AND GEOL. OPEN-FILE REPORT 78-1, 1978, P. 20.

  • Deposit

    MORRISON-KNUDSON COMPANY, INC.-MINING GROUP. MINE DEPOSIT FILE REPORT, DELAMAR SILVER MINE, JORDON VALLEY, OREGON, FINAL REPORT. USBM CONTRACT NO. SO221028, MAY 1983.

  • Deposit

    MAPCO. DELAMAR SILVER MINE. UNDATED, 5 PP.

  • Deposit

    RODGERS, WILLIAM H., KENNETH L. MOSS, AND ROBERT E. THOMASON. THE DELAMAR SILVER MINE, AN UPDATE. UNKNOWN PUB., NOV. 1980, 7 PP.

  • Deposit

    WORLD MINING DELAMAR SILVER MINE-THIRD LARGEST IN UNITED STATES NOW POURING BULLION. NOV 1977, PP 59-61.

  • Deposit

    CARTER, RUSSELL A., NATIONS NEWEST SILVER MINE USES OPEN-PIT METHODS. MINING ENGINEERING, JAN. 1978, PP. 41-44.

  • Deposit

    MCQUISTON,F.W. JR., AND R.S. SHOEMAKER. GOLD AND SILVER CYANIDATION PLANT PRACTICE, VOLUMN II.

  • Deposit

    TALBOTT, LYLE W., AND LAURENCE D. HARTZOG. SEMIAUTOGENOUS GRINDING AT THE DELAMAR SILVER MINE. SME-AIME PRE-PRINT NO. 80-59, FEB.24-28, 1980, 2 PP.

  • Deposit

    WORLD MINING, SEPT. 1982, P. 69.

  • Deposit

    MAPCO, INC., ANNUAL REPORT 1981.

  • Deposit

    MINING RECORD. LUCKY FRIDAY TOP GOLD PRODUCER. NOV. 3, 1982.

  • Deposit

    E/MJ. IDAHO, JUNE 1976.

  • Deposit

    E/MJ. IDAHO. JAN. 1977, P. 137.

  • Deposit

    E/MJ. IDAHO. SEPT. 1976, P. 152.

  • Deposit

    E/MJ. 45 TOP U.S. SILVER MINES. JUNE 1982, P. 15.

  • Deposit

    NEW YORK TIMES, APRIL 18, 1977, P. 49,51.

Reporter information

Type Date Name Affiliation Comment
Reporter 13-AUG-97 Buckingham, David A. U.S. Bureau of Mines
Reporter 01-NOV-73 Puffett, Willard P. U.S. Geological Survey
Updater 01-APR-75 Miller, Pat J. U.S. Geological Survey

Beyond USGS

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

Maps centered on this site