1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

West Fork

Producer in Reynolds county in Missouri, United States with commodities Cadmium, Cobalt, Copper, Lead, Nickel, Silver, Zinc
Map
XML
JSON
KML
B
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 10294201
MRDS ID W700610
MAS/MILS ID 0291790006
Record type Site
Current site name West Fork
Alternate or previous names Asarco Property
Related records 10085081

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -91.10903, 37.49257 (WGS84)
Elevation 280
Location accuracy 500(meters)

Site location context

Political divisions (FIPS codes)

Reynolds(county)

Missouri(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Corridon(quadrangle 1:24,000 scale)

Spring Valley(quadrangle 1:100,000 scale)

Rolla(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Black(hydrologic unit)

Upper White(hydrologic accounting unit)

Upper White(hydrologic subregion)

Arkansas-White-Red(hydrologic region)

Federal lands

Mark Twain 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 Missouri Reynolds

Public Land Survey System information

Meridian Township Range Section Fraction State
5th Principal 032 N 002 W 01 W2E2 Missouri

Commodities

Commodity Importance
Cadmium Tertiary
Cobalt Critical Tertiary
Copper Secondary
Lead Primary
Nickel Critical Tertiary
Silver Secondary
Zinc Critical Primary

Materials information

Materials Type of material
Bravoite Unknown
Calcite Unknown
Chalcopyrite Unknown
Dickite Unknown
Dolomite Unknown
Galena Unknown
Kaolinite Unknown
Linnaeite Unknown
Marcasite Unknown
Pyrite Unknown
Quartz Unknown
Sphalerite Unknown

Nearby scientific data

Ore Body (1) -91.10903, 37.49257
ListMap

Economic information

Ore body information

  • Thickness 10M
    Length 3205M
    Width 135M
    Area 40HA
    Depth to top 270M
    Field Value
    Type of Orebody #1 BRECCIA FILL
    Shape of Orebody #1 TABULAR
    Type of Orebody #2 DISSEMINATED
    Type of Orebody #3 REPLACEMENT
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control LITHOLOGY
    Secondary Ore Control CONTACT ZONE
    Degree of Wallrock Alter. SLIGHT
    Type of Wallrock Alter. #1 DOLOMITIZATION
    Type of Wallrock Alter. #2 SILICIFICATION
    Type of Wallrock Alter. #3 PYRITIZATION
    Strike And Dip N00S:
    Avg. Thick. Unconsol. Mat. 38
    Min. Thick. Unconsol. Mat. 0
    Total Surface Area (HA) 40
    Date of Last Modification 860902

Economic information about the deposit and operations

Operation type Underground
Development status Producer
Commodity type Metallic
Significant Yes
Discovery year 1959
Mining method Open Stope - Room and Pillar
Year of first production 1985
Milling method Flotation

Mining district

District name Southeast Mo

Mineral rights holdings

Type of mineral rights Fee Ownership
Type of mineral rights Federal Lease
Type of mineral rights Private Lease

Land status

Ownership category Mixed

Ownership information

  • Type Owner
    Owner Asarco (American Smelting And Refining Co.)
    ID 231787
    Interest 100
    Home office New York
    Year 1979

Production statistics

  • Year 1985
    Description 3,500 Pb (Mt) 91 Zn (Mt) 62 Ag (Kg) 65000 Mt (Mine Opened Sep 1985)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Lead Lead 3500mt
    Minor Silver Silver 62000g
    Major Zinc Zinc 91mt
  • Year 1986
    Description 30,500 Pb (Mt) 6,530 Zn (Mt) 5,660 Ag (Kg) 276000 Mt
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Minor Silver Silver 5660000g
    Major Lead Lead 30500mt
    Major Zinc Zinc 6530mt
  • Year 1993
    Description Mill Feed 924000 Mt Ore
  • Year 1994
    Description Mill Feed 915000 Mt Ore
  • Year 1995
    Description Silver Production 232000 T Oz/Yr Silver
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Minor Silver Silver 7216007.59g
  • Year 1995
    Description Mill Feed 912000 Mt Ore

Comments on the production information

  • SEVERAL OF THE RECOVERY VALUES HAVE BEEN ROUNDED BECAUSE OF DATA BASE LIMITATIONS.

Reserves and resources

  • Type In-situ
    Estimate year 1994
    Measured 5803000mt ore
    Demonstrated 5803000mt ore
    Total resources 5803000mt ore
    Commodity Subtype Grade units Group Importance Year
    Lead Pb 5.72 wt-pct Lead Major 1994
    Zinc Zn 1.61 wt-pct Zinc Major 1994
    Silver Ag 10.3 g/mt Silver Minor 1994
  • Type In-situ
    Estimate year 1996
    Demonstrated 6158000mt ore
    Total resources 6158000mt ore
    Commodity Subtype Grade units Group Importance Year
    Lead Pb 5.07 wt-pct Lead Major 1996
    Zinc Zn 1.06 wt-pct Zinc Major 1996
    Silver Ag 10.23 g/mt Silver Minor 1996

Comments on the reserve resource information

  • PROPERTY WAS UPDATED IN 10/88, IN 86US$, BY MAFO. OTHER NAME:ASARCO PROPERTY. 86 BROOK-HUNT DATA-1988-PAH 46,000 T/YR PB CONC./6,800 T/YR ZN CONC./ DEVELOPMENT COMPLETE RESERVES AND PRODUCTION FROM ASARCO INC SEC FM 10-K REPT, DEC 31, 1993, PP. A14-A18. ADIT-1993 HAD .04%CU, .02%NI, .01 CO.

Workings at the site

  • Type of workings Underground
    Length 2100M
    Overall depth 298M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ESTIMATE
    Mining Method ROOM AND PILLAR 10-34
    Swell Factor .6
    Percent Waste Rock 3
    Percent Recovery 90
    Hardness of Rock SOFT NONPLASTIC FISSURED MODERATE WATER
    Rock Characteristics MULTIPLE SYSTEMS OF WEAKNESS PLANES
    Rock Support Chars. SUPPORTING MAY BACK SLAB
    Mine Support Chars. POST, HEADBOARD, CAPS, ROOF BOLTS
    Number of Shafts 3
    1st Condition of Workings OPEN
    Capacity 1360
    Capacity Units MT ORE/DAY
    Unit Production Cost 9.04
    Units of Production $/MT ORE
    Operating Days per Year 250
    Operating Shifts per Day 2
    Year of Information 1986
  • Type of workings Underground
    Length 2100M
    Overall depth 298M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 2
    Status of Mining Method PROPOSED
    Mining Method ROOM AND PILLAR 10-34
    Swell Factor .6
    Percent Waste Rock 3
    Percent Recovery 90
    Hardness of Rock SOFT NONPLASTIC FISSURED MODERATE WATER
    Rock Characteristics MULTIPLE SYSTEMS OF WEAKNESS PLANES
    Rock Support Chars. SUPPORTING
    Mine Support Chars. POST, HEADBOARD, CAPS, ROOF BOLTS
    Number of Shafts 3
    1st Condition of Workings OPEN
    Capacity 3447
    Capacity Units MT ORE/DAY
    Unit Production Cost 8.24
    Units of Production $/MT ORE
    Operating Days per Year 250
    Operating Shifts per Day 2
    Year of Information 1986
  • Type of workings Underground
    Length 2100M
    Overall depth 298M
    Field Value
    MAS Development Schedule # 2
    Mining Record # 1
    Status of Mining Method ESTIMATE
    Mining Method ROOM AND PILLAR 10-34
    Swell Factor .6
    Percent Waste Rock 3
    Percent Recovery 90
    Hardness of Rock SOFT NONPLASTIC FISSURED MODERATE WATER
    Rock Characteristics MULTIPLE SYSTEMS OF WEAKNESS PLANES
    Rock Support Chars. SUPPORTING
    Mine Support Chars. POST, HEADBOARD, CAPS, ROOF BOLTS
    Number of Shafts 3
    1st Condition of Workings OPEN
    Capacity 1360
    Capacity Units MT ORE/DAY
    Unit Production Cost 9.04
    Units of Production $/MT ORE
    Operating Days per Year 250
    Operating Shifts per Day 2
    Year of Information 1986
  • Type of workings Underground
    Length 2100M
    Overall depth 298M
    Field Value
    MAS Development Schedule # 2
    Mining Record # 2
    Status of Mining Method PROPOSED
    Mining Method ROOM AND PILLAR 10-34
    Swell Factor .6
    Percent Waste Rock 3
    Percent Recovery 90
    Hardness of Rock SOFT NONPLASTIC FISSURED MODERATE WATER
    Rock Characteristics MULTIPLE SYSTEMS OF WEAKNESS PLANES
    Rock Support Chars. SUPPORTING MAY BACK SLAB
    Mine Support Chars. POST, HEADBOARD, CAPS, ROOF BOLTS
    Number of Shafts 3
    1st Condition of Workings NO MINE ENTRY
    Capacity 3447
    Capacity Units MT ORE/DAY
    Unit Production Cost 8.24
    Units of Production $/MT ORE
    Operating Days per Year 250
    Operating Shifts per Day 2
    Year of Information 1986

Reference information

Bibliographic references

  • Production

    ASARCO 10-K, 1995, PP-17-21.

  • Reserve-Resource

    ASARCO INC. SEC FORM 10-K REPORT, DEC. 31, 1993, PP A14-A18.

  • Reserve-Resource

    ASARCO 10-K, 1995-PP 17-21.

  • Deposit

    WHARTON, H.M., GUIDEBOOK TO GEOLOGY AND ORE DEPOSITS OF SELECTED MINES IN THE VIRBURNUM TREND, MISSOURI; MISSOURI DEPARTMENT OF NATURAL RESOURCES, GEOLOGICAL SURVEY, REPT. INV. 58, 1975, 56PP.

  • Deposit

    ENGINEERING AND MINING JOURNAL, ST. JOE MINERALS NEW LEAD BELT: TEXTBOOK EXAMPLES OF MINING EFFICIENCY; NOV. 1976 P.78-87.

  • Deposit

    U.S. BUREAU OF MINES IC 8646, 1974, AVAILABILITY OF U.S. PRIMARY LEAD RESOURCES.

  • Deposit

    ASARCO, INC. 1980 ANNUAL REPORT. PAGE 9.

  • Deposit

    ENGINEERING AND MINING JOURNAL, 1982 SURVEY OF MINE AND PLANT EXPANSION. JAN. 1982, P. 57.

  • Deposit

    MINING ENGINEERING, ASARCO'S WEST FORK MINE; APRIL 1982 P. 405.

  • Deposit

    SKILLING'S MINING REVIEW, ASARCO TO PROCEED WITH WEST FORK LEAD-ZINC MINE PROJECT; MARCH 8, 1980, P. 8.

  • Deposit

    THE DAILY JOURNAL (FLAT RIVER, MISSOURI), CONSTRUCTION OF A NEW MINE NEAR BUNKER; PRESS CLIPPING, FEBRUARY 1982.

General comments

Subject category Comment text
Deposit THE ORIGINAL PROPERTY EVALUATION WAS DONE IN 1979 DOLLARS IN 1980. THE EVALUATION UPDATE, IN 1982 DOLLARS, WAS DONE BY THE SAME EVALUATOR IN 1983. THE PROPERTY WAS REEVALUATED IN AUG. 1986 BASED ON DATA OBTAINED BY AMARO DURING PROPERTY VISIT IN NOV. 1985. PROPERTY EVALUATED IN JAN. 1986 DOLLARS. IMPORTANT ADDRESSES; ASARCO 120 BROADWAY, NEW YORK, N.Y., 1005. TEL. 212-732-9500. PROPERTY UPDATED IN SEPT 1987

Reporter information

Type Date Name Affiliation Comment
Reporter 10-MAR-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.

Operator history (post-MRDS)

MRDS records operators as of each record's last update (≤ 2019). Some of the operators listed here have since changed hands or dissolved:

  • Asarco (American Smelting And Refining Co.) — acquired by Asarco LLC, subsidiary of Grupo México (2009)
    American Smelting and Refining Co. Filed Chapter 11 in 2005; acquired out of bankruptcy by Grupo México in 2009.

Curated by qvyshift.com from publicly-reported M&A activity (SEC filings, press releases, USGS Mineral Yearbooks). Not authoritative — verify against primary sources before relying on it. The MSHA panel above is the current authoritative source for actively-permitted mines.

External references

Maps centered on this site