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Viburnum Trend

Producer in Washington county in Missouri, United States with commodities Lead, Zinc, Copper, Silver, Cobalt, Nickel, Cadmium
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Alteration
  8. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Mineral rights holdings
  17. Land status
  18. Ownership information
  19. Production statistics
  20. Reserves and resources
  21. Bibliographic references
  22. General comments
  23. Reporter information

Geologic information

Identification information

Deposit ID 10400337
Record type Deposit
Mineralized Area Viburnum Trend
Current site name Viburnum Trend
Included sites Brushy Creek Mine, Buick Mine, Fletcher Mine, Magmont Mine, Sweetwater Mine, Viburnum #27, Viburnum #28, Viburnum #29, Viburnum #35 (Casteel) Mine, West Fork Mine

Geographic coordinates

Point of reference Centroid
Geographic coordinates: -91.12903, 37.53837 (WGS84)
Location accuracy 100(meters)
Relative position Location is for Brushy Creek mine, near the center of the 72 km long Viburnum trend.

Site location context

Political divisions (FIPS codes)

Reynolds(county)

Missouri(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Greeley(quadrangle 1:24,000 scale)

Rolla(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 Washington
United States Missouri Crawford
United States Missouri Iron
United States Missouri Reynolds
United States Missouri Shannon

Comments on the location information

  • From the Doe Run Corp. October 2006 10 K/A submission to the SEC. "Doe Run?s Southeast Missouri Mining and Milling Operations (`SEMO?) based in Missouri are a major producer of lead, zinc copper. In order to exploit the underground lead-zinc-copper reserves Doe Run has seven production shafts, six of currently operating, that form a north-south line along approximately 40 miles of the ore body. Two of its production shafts, Viburnum-29 and Viburnum-35, lie within a five-mile radius, north and south, respectively, of Viburnum, Missouri, which is located approximately 125 miles southwest of St. Louis, Missouri. Doe Run?s Buick, Brushy Creek, Fletcher, West Fork and Sweetwater production shafts are within 30 miles of Viburnum. The seventh production shaft, known as West Fork, is on care and maintenance status."

    An excellent map of the the Viburnum Trend may be seen in Brumbaugh and others, 2007, http://pubs.usgs.gov/sir/2007/5057/pdf/SIR07-5057.pdf.

Commodities

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

Alteration

  • (Local) dolomitization of reef-forming carbonates

Mineral occurrence model information

Model code 224
USGS model code 32a
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 > Carbonate > Dolomite
    Rock type qualifier Light gray to dark brown dolomite which is fine to medium grained and glauconitic in places. It contains some dark green to black, thin shale beds. Some lenses of gray to pink limestone are present.
    Rock unit name Upper Bonneterre Formation
    Stratigraphic age (youngest) Late Cambrian
    Stratigraphic age (youngest) Late Cambrian

Nearby scientific data

Centroid (1) -91.12903, 37.53837
ListMap

Economic information

Geologic structures

Type of structure Local
Structure name Mostly NW trending faults in the area.
Type of structure Local
Structure name Solution collapse breccias in the Bonneterre formation.
Type of structure Regional
Structure name Ozark uplift in the stable interior of the US.
Type of structure Regional
Structure name Deposit lies on the western flank Precambrian St. Francois Mountains.

Ore body information

  • Name Viburnum Trend
    General form Tabular
    Dip Mostly flat lying beds except where close to numerous faults in the area
    Length 72000M
    Width 15000M

Comments on the ore body information

  • The entire Viburnum Trend is considered a single ore body because "the important Mississippi Valley deposits in the Central Region are the products of broad, pervasive hydrothermal mineralizing systems, and the mineralized areas are so interconnected that their designation as individual "deposits" may be only a matter of the location of property lines. The Mississippi Valley grade and tonnage models are themselves based on data for entire districts and not individual deposits." This quote is from Pratt and others (1996) in Database for a National Mineral Resource Assessment USGS OFR 96-96.
  • The orebody is stratabound and is mostly confined to the top 20-25 meters of the Bonneterre formation. It occurs as breccia filling in the dolamitized limestone of the Bonneterre formation. This is in contrast to the Old Lead Belt which forms the other part of the Southeast Missouri Lead District about 75 km to the East on the Eastern Flank of the St. Francois Mountains. The differences between the two areas is outlined in Ohle, 1990, Econ. Geol. http://econgeol.geoscienceworld.org/cgi/content/abstract/85/8/1894

Controls for ore emplacement

  • Replacement and filling of breccias by basinal brines.

Economic information about the deposit and operations

Operation type Underground
Development status Producer
Significant Yes
Discovery year 1955
Discoverer St. Joe Miniing
Year of first production 1960
Production years 1960 to present

Mining district

District name Southeast Missouri Lead District

Mineral rights holdings

Type of mineral rights Federal Lease

Land status

Ownership category Mixed
Area name Most of the land is in the Mark Twain National Forest and leased from BLM. Some is leased from the state of Missouri.

Ownership information

  • Type Operator
    Owner Doe Run Mining Co.
    Interest 100
    Home office Clayton, Mo
    Year 2009
  • Type Owner
    Owner Renco Group
    Interest 100
    Home office 30 Rockefeller Plaza, NY, NY 10112
    Year 2009

Production statistics

  • Year 2010
    Period 1960-2006 for lead and zinc, 1960-1994 for copper and silver
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Secondary In Concentrate Copper Copper 328200mt
    Primary In Concentrates Zinc Zinc 1840000mt
    Primary In Concentrates Lead Lead 13900000mt
    Secondary In Concentrate Silver Silver 1427.57mt

Reserves and resources

  • Type In-situ
    Name Viburnum Trend
    Estimate year 2005
    Proved 10709000mt
    Probable 23574000mt
    Reserves 34280000mt
    Commodity Subtype Grade units Group Importance Year
    Lead Reserves (proved+probable) 6.23 wt-pct Lead Primary 2005
    Zinc Reserves (proved+probable) 1.36 wt-pct Zinc Primary 2005
    Copper Reserves (proved+probable) 0.26 wt-pct Copper Secondary 2005
  • Type In-situ
    Estimate year 2006
    Total endowment 15900000mt
    Remarks Computed from 1960-2006 production, plus 2005 reserves, minus Higdon reserves.
    Commodity Subtype Grade units Group Importance Year
    Lead contained metal 100 wt-pct Lead Primary 2006
  • Type In-situ
    Estimate year 2006
    Total endowment 2302000mt
    Remarks Computed from 1960-2006 production, plus 2005 reserves, minus Higdon reserves.
    Commodity Subtype Grade units Group Importance Year
    Zinc contained metal 100 wt-pct Zinc Primary 2006
  • Type In-situ
    Estimate year 2006
    Total endowment 337100mt
    Remarks Computed from 1960-1994 production plus 2005 reserves.
    Commodity Subtype Grade units Group Importance Year
    Copper contained metal 100 wt-pct Copper Secondary 2006

Comments on the reserve resource information

  • This comment on Reserves is taken directly from the 2005 10-K SEC document by the Doe Run Resources Corp.

    The estimated average extraction recovery of metals, after allowing for expected dilution for lead, zinc and copper, is approximately 89%. This dilution is included in the above reserve table. Estimated average metallurgical recoveries for lead, zinc and copper are 96.5%, 83.0% and 50.0%, respectively. Metallurgical recovery losses have not been included in the above reserve table.

    Included in the 2005 table of proven and probable reserves is the Higdon deposit, which is outside of the Viburnum trend, consisting of 2.3 million tons of ore with a grade of 5.7% lead and 2.2% zinc. Similarly, the table representing the 2003 proven and probable reserves includes Higdon, which consisted of 2.7 million tons of ore with a grade of 5.7% lead and 2.0% zinc. While the surface structures and shaft are in place for the hoisting of ore from the mine, underground mine development requiring significant investment would be necessary in order to generate production from the mine. Processing of any ore mined from the Hidgon resource would require permitting and construction of a mill at the site or haulage of the ore to an existing mill in the Viburnum trend.

    Total proven and probable reserves for 2005 declined 28% from the audited 2003 total. PAH attributed this reduction due mainly to higher operating costs, which resulted in higher cutoff grades for the calculation. Additionally, mine production decreases to the reserve base were only partially offset by ore added through exploration.

    The term ?reserve? means that part of a mineral deposit that could be economically and legally extracted or produced at the time of the reserve determination. The term ?proven (measured) reserves? means reserves for which: 1) quantity is computed from dimensions revealed in outcrops, trenches, workings or drill holes; grade and/or quality are computed from the results of detailed sampling and 2) the sites for inspection, sampling and measurement are spaced so closely and the geologic character is so well defined that size, shape, depth and mineral content of reserves are well-established. The term ?probable (indicated) reserves? means reserves for which quantity and grade and/or quality are computed from information similar to that used for proven (measured) reserves, but the sites for inspection, sampling and measurement are farther apart or are otherwise less adequately spaced. The degree of assurance, although lower than that for proven (measured) reserves, is high enough to assume continuity between points of observation.

Reference information

Bibliographic references

General comments

Subject category Comment text
Age The maximum duration of the MVT mineralization event from the start of precipitation of octahedral galena in the main ore stage of paragenesis to the end of the cubic galena stage is estimated to be 12 Ma using the method of Lewchuk and Symons (1995).

Reporter information

Type Date Name Affiliation Comment
Reporter 18-DEC-09 Lipin, Bruce U.S. Geological Survey
Editor 17-MAR-10 Schruben, Paul U.S. Geological Survey

Beyond USGS

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

External references

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