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Magmont Mine

Producer in Iron county in Missouri, United States with commodities Lead, Zinc, Copper, Silver, Cadmium, Nickel, Cobalt
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Geologic information

Identification information

Deposit ID 10073171
MRDS ID W019028
MAS/MILS ID 0290930008
Record type Deposit
Current site name Magmont Mine
Alternate or previous names Casteel Viburnum # 35, Boss Bixby Lead Deposit, Magmont West

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -91.12258, 37.63949 (WGS84)
Elevation 425
Location accuracy 100(meters)
Relative position Location is for the shaft symbol on the USGS 7.5' topo map. About 2.5 km SSW of the town of Bixby Missouri.
(click for info)

Geographic areas

Country State County
United States Missouri Iron

Public Land Survey System information

Meridian Township Range Section Fraction State
5th Principal 034N 002W 13,14,23,24 Missouri
5th Principal 034N 002W 15 C W2W2 (Boss Bixby) Missouri

Commodities

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

Materials information

Materials Type of material
Galena Ore
Sphalerite Ore
Bornite Ore
Bravoite Ore
Chalcopyrite Ore
Linnaeite Ore
Marcasite Ore
Millerite Ore
Pyrite Ore
Siegenite Ore
Calcite Gangue
Dickite Gangue
Dolomite Gangue
Kaolinite Gangue
Quartz Gangue
Soda Niter Gangue

Analytical data

Result 32 SAMPLES FROM THE BOSS-BIXBY DEPOSIT WERE ANALYZED SPECTROCHEMICALLY WITH FOLLOWING MEAN PERCENTAGE CONCENTRATION: CO 0.0454 , NI 0.0056 , CU 0.174 , ZN 0.021 (KISVARSANYI, GEZA, 1977.

Mineral occurrence model information

Model code 224
USGS model code 32a
BC deposit profile E12
Deposit model name Mississippi Valley, S.E. Missouri Pb-Zn
Mark3 model number 42

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Sandstone
    Rock unit name Lamotte Sandstone
    Rock description Bonneterre;Lamotte Sandstone;Davis
    Stratigraphic age (youngest) Late Cambrian
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Dolomite
    Rock type qualifier shaley
    Rock unit name Bonneterre Fm.
    Stratigraphic age (youngest) Late Cambrian
  • Host or associated Host
    Rock unit name Davis Fm.
    Stratigraphic age (youngest) Late Cambrian

Nearby scientific data

Ore Body (1) -91.12258, 37.63949
ListMap

Geologic structures

Type Description Terms
Regional Ozark Dome, St. Francios Igneous High , Buick Embayment
Local Davis Shale Overlies The Bonneterre Formation And Has Acted As An Impervious Barrier To Solution Flow. Underlying Precambrian Knobs Are Not Present. Joint System Oriented About N 50 Deg E And N 30 Deg W. High Ore Zone Is Bound By Faults Which Can Be Traced Continuously For About 4500 Ft In The Magmont Mine And Extend North And South Into Adjoining Property. All The High Ore Along This 4500 Ft Is Marked On Both East And West Sides By These Distinctive Shale-Filled Subsidence Fractures.

Ore body information

  • General form TABULAR
    Thickness 15M
    Depth to bottom 381M
    Depth to top 366M
  • Thickness 27M
    Depth to top 355M
    Width 600M
    Length 2438M
    Field Value
    MAS Matrix # 1
    MAS Column # 1
    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 FRACTURING
    Strike And Dip N00S
    Minimum Depth to Top 311
    Avg. Thick. Unconsol. Mat. 40
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 801106
  • Area 25HA
    Field Value
    Total Surface Area (HA) 25
    Date of Last Modification 910418

Controls for ore emplacement

  • Solution-Induced Collapse Breccias, Gravity Slumps, The "Silty Marker", And Inter-Reef Calcarenites

Comments on the geologic information

  • REPETITIOUS CHARACTER OF THE SULFIDE MINERAL DEPOSITION INDICATES THAT THE ORES WERE DEPOSITED OVER A LONG PERIOD OF TIME AND THAT THE ORE-CONTROLLING STRUCTURES DEVELOPED DURING THE SPAN OF ORE DEPOSITION (HAGNI, R.D., AND TRANCYNGER, T.C., 1977 ).

Economic information

Economic information about the deposit and operations

Operation type Underground
Development status Producer
Commodity type Metallic
Deposit size Large
Significant Yes
Discovery year 1962
Discoverer Cominco American, Inc. And Dresser Industries, Inc. Adjacent (and subsequently purchased) Boss Bixby deposit, discovered in 1956.
Discovery method Ore-Mineral In Place
Mining method Open Stope - Room and Pillar
Year of first production 1968
Plant subcategory Flotation
Milling method Flotation

Mining district

District name Southeast Missouri District
District name Viburnum Trend
District name New Lead Belt

Mineral rights holdings

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

Land status

Ownership category National Forest

Ownership information

  • Type Owner-Operator
    Owner Cominco American, Inc.
    Interest 50
    Home office Washington
    Year 1979
  • Type Owner
    Owner Dresser Industries Inc.
    Interest 50
    Home office Texas
    Year 1979
  • Type Unknown
    Owner Renco
    Home office New York
    Year 1997

Production statistics

  • Year 1968
    Material ore
    Ore mined 116,000mt
    Accuracy Accurate
    Description 16,757 200 93 1,148 116000 Mt Grd: 14.7%Pb, 1.9%Zn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Lead Lead 16,757mt 15wt-pct
    Secondary Zinc Zinc 200mt 2wt-pct
    Secondary Copper Copper 93mt
    Secondary Silver Silver 1mt
  • Year 1969
    Material ore
    Ore mined 538,000mt
    Accuracy Accurate
    Description 54,966 5,311 3,010 6,991 538000 Mt Grd: Nr Pb, Nr Zn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Lead Lead 54,966mt
    Secondary Zinc Zinc 5,311mt
    Secondary Copper Copper 3,010mt
    Secondary Silver Silver 7mt
  • Year 1970
    Material ore
    Ore mined 779,000mt
    Accuracy Accurate
    Description 77,106 6,882 2,262 11,126 779000 Mt Grd: Nr Pb Nr Zn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Lead Lead 77,106mt
    Secondary Zinc Zinc 6,882mt
    Secondary Copper Copper 2,262mt
    Secondary Silver Silver 11mt
  • Year 1971
    Material ore
    Ore mined 944,000mt
    Accuracy Accurate
    Description 65,821 5,634 1,816 9,071 944000 Mt Grd: 7.6%Pb, 0.93zn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Lead Lead 65,821mt 8wt-pct
    Secondary Zinc Zinc 5,634mt 1wt-pct
    Secondary Copper Copper 1,816mt
    Secondary Silver Silver 9mt
  • Year 1972
    Material ore
    Ore mined 932,000mt
    Accuracy Accurate
    Description 63,749 4,104 2,403 7,552 932000 Mt Grd: 7.3%Pb, 0.69zn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Lead Lead 63,749mt 7wt-pct
    Secondary Zinc Zinc 4,104mt 1wt-pct
    Secondary Copper Copper 2,403mt
    Secondary Silver Silver 8mt
  • Year 1973
    Material ore
    Ore mined 847,000mt
    Accuracy Accurate
    Description 59,627 5,014 2,194 8,920 847000 Mt Grd: 7.6%Pb, 1.9%Zn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Lead Lead 59,627mt 8wt-pct
    Secondary Zinc Zinc 5,014mt 2wt-pct
    Secondary Copper Copper 2,194mt
    Secondary Silver Silver 9mt
  • Year 1974
    Material ore
    Ore mined 946,000mt
    Accuracy Accurate
    Description 62,723 6,568 2,810 10,996 946000 Mt Grd: 7.2%Pb, 1.0%Zn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Lead Lead 62,723mt 7wt-pct
    Secondary Zinc Zinc 6,568mt 1wt-pct
    Secondary Copper Copper 2,810mt
    Secondary Silver Silver 11mt
  • Year 1975
    Material ore
    Ore mined 977,000mt
    Accuracy Accurate
    Description 69,778 7,928 5,317 13,872 977000 Mt Grd: 7.8%Pb, 1.2%Zn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Lead Lead 69,778mt 8wt-pct
    Secondary Zinc Zinc 7,928mt 1wt-pct
    Secondary Copper Copper 5,317mt
    Secondary Silver Silver 14mt
  • Year 1976
    Material ore
    Ore mined 971,000mt
    Accuracy Accurate
    Description 65,948 8,775 3,190 13,115 971000 Mt Grd: 7.4%Pb, 1.2%Zn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Lead Lead 65,948mt 7wt-pct
    Secondary Zinc Zinc 8,775mt 1wt-pct
    Secondary Copper Copper 3,190mt
    Secondary Silver Silver 13mt
  • Year 1977
    Material ore
    Ore mined 992,000mt
    Accuracy Accurate
    Description 60,114 9,272 3,666 6,281 992000 Mt Grd: 7.0%Pb, 1.4%Zn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Lead Lead 60,114mt 7wt-pct
    Secondary Zinc Zinc 9,272mt 1wt-pct
    Secondary Copper Copper 3,666mt
    Secondary Silver Silver 6mt
  • Year 1978
    Material ore
    Ore mined 953,000mt
    Accuracy Accurate
    Description 73,910 9,817 1,936 7,063 953000 Mt Grd: 8.8%Pb, 1.6%Zn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Lead Lead 73,910mt 9wt-pct
    Secondary Zinc Zinc 9,817mt 2wt-pct
    Secondary Copper Copper 1,936mt
    Secondary Silver Silver 7mt
  • Year 1979
    Material ore
    Ore mined 994,000mt
    Accuracy Accurate
    Description 71,482 8,877 2,739 7,452 994000 Mt Grd: 8.2%Pb, 1.4%Zn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Lead Lead 71,482mt 8wt-pct
    Secondary Zinc Zinc 8,877mt 1wt-pct
    Secondary Copper Copper 2,739mt
    Secondary Silver Silver 7mt
  • Year 1980
    Material ore
    Ore mined 984,000mt
    Accuracy Accurate
    Description 70,769 6,202 2,463 4,995 984000 Mt Grd: 8.0%Pb, 1.0%Zn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Lead Lead 70,769mt 8wt-pct
    Secondary Zinc Zinc 6,202mt 1wt-pct
    Secondary Copper Copper 2,463mt
    Secondary Silver Silver 5mt
  • Year 1981
    Material ore
    Ore mined 1,022,000mt
    Accuracy Accurate
    Description 64,889 7,411 1,802 5,714 1022000 Mt Grd: 7.0%Pb, 1.1%Zn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Lead Lead 7wt-pct
    Secondary Zinc Zinc 1wt-pct
  • Year 1982
    Material ore
    Ore mined 1,004,000mt
    Accuracy Accurate
    Description 58,631 6,497 1,779 6,563 1004000 Mt Grd: 6.5%Pb, 1.0%Zn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Lead Lead 58,631mt 7wt-pct
    Secondary Zinc Zinc 6,497mt 1wt-pct
    Secondary Copper Copper 1,779mt
    Secondary Silver Silver 7mt
  • Year 1983
    Material ore
    Ore mined 1,036,000mt
    Accuracy Accurate
    Description 67,335 10,084 760 8,688 1036000 Mt Grd: 7.2%Pb, 1.4%Zn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Lead Lead 67,335mt 7wt-pct
    Secondary Zinc Zinc 10,084mt 1wt-pct
    Secondary Copper Copper 760mt
    Secondary Silver Silver 9mt
  • Year 1984
    Material ore
    Ore mined 1,011,300mt
    Accuracy Accurate
    Description 66,082 15,207 915 5,431 1011300 Mt Grd: 7.1%Pb, 2.1%Zn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Lead Lead 66,082mt 7wt-pct
    Secondary Zinc Zinc 15,207mt 2wt-pct
    Secondary Copper Copper 915mt
    Secondary Silver Silver 5mt
  • Year 1985
    Material ore
    Ore mined 1,041,000mt
    Accuracy Accurate
    Description 71,853 13,962 1,043 6,913 1041000 Mt Grd: 7.5%Pb, 1.9%Zn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Lead Lead 71,853mt 8wt-pct
    Secondary Zinc Zinc 13,962mt 2wt-pct
    Secondary Copper Copper 1,043mt
    Secondary Silver Silver 7mt
  • Year 1986
    Material ore
    Ore mined 948,000mt
    Accuracy Accurate
    Description 76,973 10,900 1,600 7,080 948000 Mt Grd: 8.6%Pb, 1.5%Zn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Lead Lead 76,973mt 9wt-pct
    Secondary Zinc Zinc 10,900mt 2wt-pct
    Secondary Copper Copper 1,600mt
    Secondary Silver Silver 7mt
  • Year 1987
    Material ore
    Ore mined 1,003,000mt
    Accuracy Accurate
    Description 69,200 12,950 1,800 1003000 Mt Grd: 7.1%Pb, 1.5%Zn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Lead Lead 69,200mt 7wt-pct
    Secondary Zinc Zinc 12,950mt 2wt-pct
    Secondary Copper Copper 1,800mt
  • Year 1988
    Material ore
    Ore mined 1,001,500mt
    Accuracy Accurate
    Description 69,600 8,000 1,400 1001500 Mt Grd: 7.2%Pb, 1.0%Zn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Lead Lead 69,600mt 7wt-pct
    Secondary Zinc Zinc 8,000mt 1wt-pct
    Secondary Copper Copper 1,400mt
  • Year 1989
    Material ore
    Ore mined 962,200mt
    Accuracy Accurate
    Description 63,100 7,720 1,340 962200 Mt Grd: 6.8%Pb, 1.0%Zn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Lead Lead 63,100mt 7wt-pct
    Secondary Zinc Zinc 7,720mt 1wt-pct
    Secondary Copper Copper 1,340mt
  • Year 1990
    Material ore
    Ore mined 984,200mt
    Accuracy Accurate
    Description 67,700 8,030 1,460 984200 Mt Grd: 7.1%Pb, 1.0%Zn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Lead Lead 67,700mt 7wt-pct
    Secondary Zinc Zinc 8,030mt 1wt-pct
    Secondary Copper Copper 1,460mt
  • Year 1991
    Material ore
    Ore mined 1,018,700mt
    Accuracy Accurate
    Description 64,800 8,450 1,260 1018700 Mt Grd: 6.5%Pb, 1.0%Zn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Lead Lead 64,800mt 7wt-pct
    Secondary Zinc Zinc 8,450mt 1wt-pct
    Secondary Copper Copper 1,260mt
  • Year 1992
    Material ore
    Ore mined 872,800mt
    Accuracy Accurate
    Description 51,800 7,410 1,260 872800 Mt Grd: 6.1%Pb, 1.0%Zn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Lead Lead 51,800mt 6wt-pct
    Secondary Zinc Zinc 7,410mt 1wt-pct
    Secondary Copper Copper 1,260mt
  • Year 1993
    Material ore
    Ore mined 631,100mt
    Accuracy Accurate
    Description 42,870 6,190 1,000 631100 Mt Grd: 7.0%Pb, 1.2%Zn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Lead Lead 42,870mt 7wt-pct
    Secondary Zinc Zinc 6,190mt 1wt-pct
    Secondary Copper Copper 1,000mt

Comments on the production information

  • YEAR OF 1ST PRODUCTION, 1968. CONCENTRATOR CAP 3810 MTPD ORE TO PRODUCE 63,500 MTPY CONCENTRATES. 5 DAY WORK WEEK. ITEMS 2, 3, 4 ARE COMINCO'S MISSOURI PRODUCTION.CAPACITY OF THE MINE-MILL COMPLEX IS 1000000 TONS PER YEAR. LEAD CONCENTRATES ARE SMELTED ON A TOLL BASIS AT THE AMAX-HOMESTAKE BUICK LEAD SMELTER. ZINC CONCENTRATE GOES TO THE AMAX ELECTROLYTIC ZINC PLANT AT SAUGET, ILLINOIS. COPPER CONCENTRATES ARE PRESENTLY ( 1975 ) EXPORTED.

Reserves and resources

  • Type In-situ
    Estimate year 2008
    Total endowment 23,400,000mt ore
    Remarks From Leach, D.L. (USGS) significant PbZn list. His source was Bradly and Krolak, 1989.
    Commodity Subtype Grade units Group Importance Year
    Lead 7.3 wt-pct Lead Primary 2008
    Zinc 1 wt-pct Zinc Primary 2008
    Copper 0.26 wt-pct Copper Secondary 2008
    Silver 10.6 g/mt Silver Secondary 2008

Workings at the site

  • Type of workings Underground
    Overall depth 305M
    Overall width 609.6M

Comments on the workings information

  • BASIC ROOM-AND-PILLAR, TRACKLESS METHOD.

Comments on development

  • MILL$: 18.5 ; MILL.CAP: 1000 ; ECON.YEAR: 1977 ; ECON.COM: REPLACEMENT INTERGROWTHS OF GALENA AND SPHALERITE PRODUCE ENOUGH BINARY LOCKED PARTICLES TO CAUSE A PROBLEM WITH THE SMALL AMOUNTS OF ZINC IN THE LEAD CONCENTRATES; SOME OF THE SMALLER SPHALERITE GRAINS FORM LOCKED PARTICLES WITH DOLOMITE AND CARRY AMOUNTS OF MAGNESIA INTO THE ZINC CONCENTRATE. HIGH LEAD CONTENT OF THE COPPER CONCENTRATES PREVENTS THEM FROM BEING MARKETED DOMESTICALLY. WHERE SIEGENITE REPLACES SPHALERITE, INTIMATE REPLACEMENT TEXTURES LOCK THE SIEGENITE WITH THE SPHALERITE, AND IT IS REPORTED WITH THE ZINC CONCENTRATE; THE MARKETABILITY OF THE ZINC CONCENTRATE IS ADVERSELY AFFECTED.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS W019028
U.S. Bureau of Mines Minerals Availability System MAS 0290930006 MRDS dep_id 10171147 merged into 10073171
U.S. Bureau of Mines Minerals Availability System MAS 0290930008 MRDS dep_id 10147119 merged into 10073171
U.S. Bureau of Mines Minerals Availability System MAS 0290930014 MRDS dep_id 10293274 merged into 10073171

Bibliographic references

  • Deposit

    SNYDER, F. G., GERDEMANN, P. E., 1968, GEOLOGY OF THE SOUTHEAST MISSOURI LEAD DISTRICT; IN RIDGE, J. D. ED., ORE DEPOSITS OF THE U.S., 1933-1967, V. 1 P. 326-358

  • Economic Factors

    MC ILROY P., COFFMAN, J.S., HIBPSHMAN, M.H., 1974, AVAILABILITY OF U.S. PRIMARY LEAD RESOURCES. U.S.B.M., IC 8646.

  • Deposit

    SCHWANDT, A.J.W., 1970, THE MAGMONT OPERATION; IN RAUSCH, D.O. & MARIACHER, B.C., EDS., 1970, AIME WORLD SYMPOSIUM ON MINING AND METALLURGY, LEAD & ZINC V. 1 PP. 218-227.

  • Deposit

    SWEENEY, PETER H., HARRISON, EDWIN D., BRADLEY, MILTON, 1977, GEOLOGY OF THE MAGMONT MINE, VIBURNUM TREND, SOUTHEAST MISSOURI, ECON. GEOL., V. 72, P. 365-371.

  • Deposit

    HAGNI, RICHARD D. AND TRANCYNGER, THOMAS C., 1977, SEQUENCE OF DEPOSITION OF THE ORE MINERALS AT THE MAGMONT MINE, VIBURNUM TREND, SOUTHEAST MISSOURI, ECON. GEOL., V. 72, P. 451-464.

  • Deposit

    SWEENEY, PETER H., HARRISON, EDWIN, BRADLEY, MILTON, 1975, MAGMONT MINE (COMINCO AMERICAN INC. & DRESSER INDUSTRIES INC.), VIBURNUM TREND, SOUTHEAST MISSOURI; IN GUIDEBOOK TO THE GEOLOGY AND ORE DEPOSITS OF SELECTED MINES IN THE VIBURNUM TREND, MISSOURI, NO. 58, ROLLA, MISSOURI PP. 21-29.

  • Deposit

    Bradley, M.F., and Krolak, T.E., 1989, The Magmont-West lead-zinc-copper mine (Cominco American Incorporated?Dresser Minerals) Viburnum Trend, Southeast Missouri, Mississsippi Valley-type mineralization of the Viburnum Trend, Missouri: Society of Economic Geologists Field Conference Guidebook, v. 5, p. 84?95.

  • Production

    US BUREAU OF MINES, 1978

  • Deposit

    Hagni, R.D., 1995, The Southeast Missouri lead district: Society of Economic Geologists Guidebook Series, v. 22, p. 44?78.

  • Reserve-Resource

    E/MJ DIRECTORY 1975, 1976, 1980 p. 199.

  • Deposit

    KISVARSANYI, GEZA, 1977 , THE ROLE OF THE PRECAMBRIAN IGNEOUS BASEMENT IN THE FORMATION OF THE STRATABOUND LEAD-ZINC-COPPER DEPOSITS IN SOUTHEAST MISSOURI, ECON. GEOL., V. 72 , P. 435 - 442.

  • Deposit

    SMITH, FREDERICK J., 1968 , MINERALIZATION OF THE BOSS BIXBY ANOMALY, IRON AND DENT COUNTIES, MISSOURI, MASTER'S THESIS, UNIV. MISSOURI-ROLLA, 76 P.

  • Deposit

    KINKEL, A.R., JR., 1967, COPPER, IN MINERAL AND WATER RESOURCES OF MISSOURI: MISSOURI DIVISION OF GEOLOGICAL SURVEY AND WATER RESOURCES, V. 43, P. 67.

  • Deposit

    KISVARSANYI, GEZA, AND PROCTOR, P.D., 1967, TRACE ELEMENT CONTENT OF MAGNETITES AND HEMATITES, SOUTHEAST MISSOURI IRON METALLOGENIC PROVINCE, U.S.A.: ECON. GEOL., V. 62, NO. 1, P. 449-471.

General comments

Subject category Comment text
Deposit ORE THICKNESS IN WESTERN ORE ZONE IS COMMONLY ABOUT 35 FT. EASTERN ZONE AVERAGES ABOUT 200 FT IN WIDTH IN AN EAST-WEST DIRECTION. MAXIMUM VERTICAL THICKNESS IS ABOUT 50 FT (CENTRAL ORE ZONE, WHICH CONTAINS THE MAJOR TONNAGE OF ORE IS MINERALIZED FROM THE BASE OF THE SILTY MARKER UP TO AND ABOVE THE FALSE DAVIS). THREE ORE ZONES ARE ALL ALIGNED ABOUT PARALLEL TO THE NORTH-SOUTH AXIS OF THE VIBURNUM TREND. EAST-WEST DISTANCE ACROSS THESE THREE TRENDS IS ABOUT 2000 FT.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-76 Schruben, Paul G. U.S. Geological Survey
Reporter 31-OCT-97 Unknown U.S. Bureau of Mines
Reporter 03-FEB-95 B.W.&T.D. U.S. Bureau of Mines