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Bald Mountain/Alig Ridg-Yankee Mine

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. 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 10126180
MRDS ID SD02013
MAS/MILS ID 0320330503
Record type Site
Current site name Bald Mountain/Alig Ridg-Yankee Mine
Alternate or previous names Bald Mountain
Related records 10055461

Geographic coordinates

Point of reference Pit
Geographic coordinates: -115.57619, 39.94852 (WGS84)
Elevation 2440
Location accuracy 1000(meters)

Site location context

Political divisions (FIPS codes)

White Pine(county)

Nevada(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Big Bald Mountain(quadrangle 1:24,000 scale)

Newark Lake(quadrangle 1:100,000 scale)

Ely(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

South Fork Humboldt(hydrologic unit)

Humboldt(hydrologic accounting unit)

Black Rock Desert-Humboldt(hydrologic subregion)

Great Basin(hydrologic region)

Federal lands

Bureau of Land Management(Bureau of Land Management NV)

Bureau of Land Management NV BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States Nevada White Pine

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 024 N 057 E 12 NE Nevada

Comments on the location information

  • GENERAL LOCATION: ABOUT 130 KM NW OF ELY.

Commodities

Commodity Importance
Gold Primary
Silver Secondary

Materials information

Materials Type of material
Calcite Unknown
Cerussite Unknown
Chrysocolla Unknown
Jasper Unknown
Malachite Unknown
Molybdenite Unknown
Powellite Unknown
Pyrite Unknown
Quartz Unknown
Stibnite Unknown

Nearby scientific data

Pit (1) -115.57619, 39.94852
ListMap

Economic information

Ore body information

  • Length 600M
    Width 600M
    Field Value
    MAS Matrix # 1
    MAS Column # 1
    Type of Orebody #1 DISSEMINATED
    Shape of Orebody #1 UNKNOWN
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control FAULTING
    Secondary Ore Control LITHOLOGY
    Date of Last Modification 850814
  • Length 600M
    Width 600M
    Field Value
    MAS Matrix # 1
    MAS Column # 2
    Type of Orebody #1 DISSEMINATED
    Shape of Orebody #1 UNKNOWN
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control FAULTING
    Secondary Ore Control LITHOLOGY
    Date of Last Modification 850814
  • Length 600M
    Width 300M
    Field Value
    MAS Matrix # 1
    MAS Column # 3
    Type of Orebody #1 DISSEMINATED
    Shape of Orebody #1 UNKNOWN
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control FAULTING
    Date of Last Modification 850814
  • Length 760M
    Width 760M
    Field Value
    MAS Matrix # 1
    MAS Column # 4
    Type of Orebody #1 DISSEMINATED
    Shape of Orebody #1 UNKNOWN
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control FAULTING
    Date of Last Modification 850814

Comments on the geologic information

  • MINERALS LISTED ARE FROM DISTRICT,MINE MINERALS UNAVAILABLE.
  • LIMEY SHALES AND LIMESTONES EXPOSED AT DRILL ROADS.

Economic information about the deposit and operations

Operation type Surface
Development status Plant
Commodity type Metallic
Deposit size Small
Significant Yes
Discovery year 1975
Mining method Open Pit
Year of first production 1983
Plant type Leach
Milling method Heap Leach-Agglomerate-Carbon Column-Electrowin

Comments on exploration

  • INTENSIVE ONGOING EXPLORATION ON 3 ADJACENT AREAS IN 1983.

Mining district

District name Bald Mountain District

Mineral rights holdings

Type of mineral rights Located Claim

Land status

Ownership category BLM Administrative Area

Ownership information

  • Type Owner-Operator
    Owner Placer Dome U. S. Inc. (Sub Of Placer Dome Inc.)
    Interest 100
    Home office Nevada
    Year 1996
    First year 1975

Production statistics

  • Year 1986
    Description Heap Leach 1,085,481 G Au Produced 600553 Metric Ton Ore/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 1085481g
  • Year 1987
    Description Heap Leach 1,497,074 G Au Produced 772010 Metric Ton Ore/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 1497074g
  • Year 1988
    Description Heap Leach 1,512,221 G Au Produced 946189 Metric Ton Ore/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 1512221g
  • Year 1989
    Description Heap Leach 1,714,176 G Au Produced 1088616 Metric Ton Ore/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 1714176g
  • Year 1990
    Description Heap Leach 1,870,191 G Au Produced 1179334 Metric Ton Ore/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 1870191g
  • Year 1992
    Description Gold Production (Bald Mt Only) 81582 T Oz/Yr Gold
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 2537484.18g
  • Year 1993
    Description Gold Production(Bald Mt+Alig Rdg+Yankee) 90612 T Oz/Yr Gold
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 2818348.62g
  • Year 1994
    Description Gold Production 120289 T Oz/Yr Gold
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 3741406.62g
  • Year 1995
    Description Mill Feed Ore @ 1.6 G/Mt Au 2632000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 2g/mt
  • Year 1995
    Description Gold Production(Bald Mt+Alig Rdg+Yankee) 114215 T Oz/Yr Gold
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 3552484.08g
  • Year 1996
    Description Mill Feed Ore @ 1.5 G/Mt Au 3124000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 2g/mt
  • Year 1996
    Description Gold Production 107708 Tr Oz/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 3350093.73g

Comments on the production information

  • 1988 AU PROD.= 50,000 OZ., 1989 AU PROD. = 55,112 OZ. FROM LEACHING 1,088,000 MT ORE. 1989 RESERVE = 462,000 OZ.CONT.AU PAST DISTRICT PRODUCTION: FROM VEIN-LIKE REPLACEMENT DEPOSI- TS IN BRECCIA ZONES (SOME JASPEROID) ALONG NW,NE OR N TRE- NDING FAULTS IN LIMESTONE; NW OR W TRENDING QTZ. VEINS IN QTZ. MONZONITE PORPHYRY AND IN VALLEY PLACERS. PAST MINE PRODUCTION: 109 KG AU FROM 60000 T TEST HEAP LEACH IN 1983. PRIOR TO 1993 ONLY BALD MOUNTAIN PRODUCTION. AS OF 1993 PRODUCTION INCLUDES YANKEE AND ALLIGATOR RIDGE.

Reserves and resources

  • Type In-situ
    Estimate year 1991
    Measured 6000000mt ore
    Demonstrated 6000000mt ore
    Total resources 6000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 2.43 g/mt Gold Major 1991
  • Type In-situ
    Estimate year 1992
    Demonstrated 14552000mt ore
    Total resources 14552000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 1.89 g/mt Gold Major 1992
  • Type In-situ
    Estimate year 1996
    Demonstrated 11373000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 2.6 g/mt Gold Major 1996
  • Type In-situ
    Estimate year 1996
    Inferred 32058000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 1.2 g/mt Gold Major 1996
  • Type In-situ
    Estimate year 1996
    Total resources 43431000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 1.6 g/mt Gold Major 1996
  • Type In-situ
    Estimate year 1997
    Demonstrated 19104000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 1.7 g/mt Gold Major 1997
  • Type In-situ
    Estimate year 1997
    Demonstrated 27237000mt ore
    Total resources 27237000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 1.1 g/mt Gold Major 1997
  • Type In-situ
    Estimate year 1997
    Demonstrated 46341000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 1.35 g/mt Gold Major 1997

Comments on the reserve resource information

  • HEAP LEACH OPERATION. ANNUAL CAP BASED AVG 1996-96 DATA. RESERVES/RESOURCES; TOTAL DEMONSTRATED (PROV+PROB+MEAS+INDI) ORE; 12/31/96; INCLUDES MATERIAL FROM ALLIGATOR RIDGE & THE YANKEE MINE:
  • BIBLIOG REF NOT GIVEN.

Workings at the site

  • Type of workings Surface
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ESTIMATE
    Mining Method OPEN PIT
    Capacity 2702
    Capacity Units MT ORE/DAY
    Unit Production Cost 10.03
    Units of Production $/MT ORE
    Operating Days per Year 208
    Operating Shifts per Day 2
    Year of Information 1991

Comments on the workings information

  • PROCESS WATER: 4,000,000 GPD IN SUMMER AND 2,000,000 GPD IN WINTER.

Comments on other economic factors

  • LEACH TESTS TO BEGIN IN SEPTEMBER,1983 & END JUNE,1984.

Reference information

Bibliographic references

  • Production

    PLACER DOME INC., 1996 FORM 40-F, P13.

  • Reserve-Resource

    PLACER DEVELOPMENT LTD. ANNUAL REPORT, 1980. 1981,

  • Reserve-Resource

    PP. 9-10, 19.

  • Reserve-Resource

    NEVADA MINING ASSOCIATION (RENO). PLACER AMEX TEST

  • Reserve-Resource

    RUN OF NEW OPEN-PIT GOLD MINE. NV MIN. ASSOC. BULL., V. 7,

  • Reserve-Resource

    NO. 3, 1983, P. 10.

  • Reserve-Resource

    NEVADA MINING ASSOCIATION (RENO). PLACER DEVELOPMENT

  • Reserve-Resource

    TARGETS U.S. ACTIVITIES ON PRECIOUS METALS. NV MIN.

  • Reserve-Resource

    ASSOC. BULL., V. 8, NO. 2, 1984, P. 4.

  • Reserve-Resource

    PLACER DOME, INC. PRESS RELEASE, FEB. 22, 1996, PP10, 11.

  • Reserve-Resource

    PLACER DOME, INC. 1995 FORM 10-K REPORT, P12.

  • Reserve-Resource

    1995/96 NEVADA MINES DIRECTORY, P16.

  • Reserve-Resource

    PLACER DOME INC., 1996 FORM 40-F, PP 14-6.

  • Deposit

    BLAKE, J. W. GEOLOGY OF THE BALD MOUNTAIN INTRUSIVE,

  • Deposit

    RUBY MOUNTAINS, NEVADA. M.S. THESIS, BRIGHAM YOUNG UNIV.,

  • Deposit

    PROVO, UT, 1964, 35 PP.

  • Deposit

    HOSE, R. K., M. C. BLAKE, AND R. M. SMITH. GEOLOGY

  • Deposit

    AND MINERAL RESOURCES OF WHITE PINE COUNTY, NEVADA. NV

  • Deposit

    BUREAU OF MINES AND GEOL. BULL. 85, 1976, 105 PP.

  • Deposit

    RAVENSCROFT, A. W. THE GEOLOGY OF THE BIG BALD

  • Deposit

    MOUNTAIN, WHITE PINE COUNTY, NEVADA. M.S. THESIS, SAN

  • Deposit

    DIEGO STATE UNIV., SAN DIEGO, CA, 1974, 90 PP.

  • Deposit

    RIGBY, J. K. GEOLOGY OF THE BUCK MOUNTAIN-BALD

  • Deposit

    MOUNTAIN AREA, SOUTHERN RUBY MOUNTAINS, WHITE PINE COUNTY,

  • Deposit

    NEVADA. INTERMOUNTAIN ASSOC. PETROL. GEOL. GUIDEBOOK TO

  • Deposit

    THE GEOLOGY OF EAST CENTRAL NEVADA, 11TH ANNU. FIELD CONF.,

  • Deposit

    UT GEOL. ASSOC., SALT LAKE CITY, UT, 1960, PP. 173-180,

  • Deposit

    FIG. 4, SCALE 1:125,000; FIG. 5, SCALE 1:125,000.

  • Deposit

    SHARP, R. P. STRATIGRAPHY AND STRUCTURE OF THE

  • Deposit

    SOUTHERN RUBY MOUNTAINS, NEVADA. GEOL. SOC. AM. BULL.,

  • Deposit

    V. 53, 1942, PP. 681-684.

  • Deposit

    WESTERN MINER (VANCOUVER, BC). ALIVE IN THE WEST:

  • Deposit

    CANADIAN EXPLORATION AND MINING; WIDE-RANGING INTERESTS OF

  • Deposit

    PLACER DEVELOPMENT. V. 57, NO. 4, APR. 1984, PP.9-12.

  • Deposit

    NEVADA MINING ASSOC. PLACER INCREASES OPERATION AT BALD

  • Deposit

    MOUNTAIN. BULL., V. 9, NO. 3, 1985, P. 14.

  • Deposit

    R. RANEY INTERVIEW WITH D. BAILEY, MINE MANAGER AND D.J.

  • Deposit

    PAREDES, MINE ENGINEER, AT THE BALD MOUNTAIN MINE, OCT 1991.

  • Deposit

    PLACER DOME INC. 1990 ANNUAL REPORT, 64 P.

  • Deposit

    RANDOL, MINING DIRECTORY, 1996/1997, U.S. MINES &

  • Deposit

    COMPANIES, P229.

  • Deposit

    PLACER DOME INC., PRESS RELEASE, 02/22/96, PP. 10, 11.

General comments

Subject category Comment text
Deposit GENERAL SIZE OF ORE BODY: SMALL. FILE INCLUDES AS OF 12/31/95 THE ALLIGATOR RIDGE MAS PROPERTY SEQ# 0320330470 AND YANKEE MINE MAS PROPERTY SEQ# 0320330075.

Reporter information

Type Date Name Affiliation Comment
Reporter 12-SEP-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.