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Demos Group

Occurrence in Madison county in Montana, United States with commodities Tungsten, Silver, Copper, Lead, Iron, Manganese, 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. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Ownership information
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10019944
MRDS ID DC12012
Record type Site
Current site name Demos Group
Alternate or previous names Margie, Roger, Lucky Joe, Rockefeller, Independent
Related records 10197368

Geographic coordinates

Geographic coordinates: -111.97586, 45.57546 (WGS84)
Elevation 2591

Site location context

Political divisions (FIPS codes)

Madison(county)

Montana(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Potosi Peak(quadrangle 1:24,000 scale)

Bozeman(quadrangle 1:100,000 scale)

Bozeman(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Jefferson(hydrologic unit)

Missouri Headwaters(hydrologic accounting unit)

Missouri Headwaters(hydrologic subregion)

Missouri(hydrologic region)

Federal lands

Beaverhead-Deerlodge 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 Montana Madison

Public Land Survey System information

Meridian Township Range Section Fraction State
Montana Principal 003S 003W 16 Montana

Comments on the location information

  • LOCATED NORTH OF SOUTH WILLOW CREEK BETWEEN POTOSI AND MINE PEAKS.

Commodities

Commodity Importance
Tungsten Critical Primary
Silver Primary
Copper Tertiary
Lead Tertiary
Iron Tertiary
Manganese Critical Tertiary
Antimony Critical Tertiary

Materials information

Materials Type of material
Anglesite Ore
Cerargyrite Ore
Huebnerite Ore
Tetrahedrite Ore
Chalcopyrite Gangue
Fluorite Gangue
Pyrite Gangue

Analytical data

Result ASSAYS MADE

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous

Nearby scientific data

(1) -111.97586, 45.57546
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Nw Bismark Fault

Ore body information

  • General form LENSES
    Strike N70-80E
    Dip 45-80 NW

Controls for ore emplacement

  • Quart Monzonite Intrusion Into Prec, Pre-Belt Gneiss Series

Comments on the geologic information

  • GEOL.DESC: VEINS STK. N 60-70 E, DIP 80 NW.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No
Discovery year 1906

Mining district

District name Potosi District

Ownership information

  • Type Operator
    Owner Rotosi Tungsten Mining Co.
  • Type Owner
    Owner H. Demos
    Home office Butte, Mt.
    First year 1958

Comments on the workings information

  • CLAIMS CONTAIN SHAFTS, ADITS AND NUMEROUS PITS

Reference information

Bibliographic references

  • Deposit

    EYDE, TH, 1958, POTOSI TUNGSTEN DIST, MADISON CO, MONT, MONT. BUREAU OF MINES & GEOL. INF. CIR. 21, P. 39

  • Deposit

    TANSLEY, HART, 1933, GEOL RECON. OF THE TABACCO ROOT MTNS, MADISON, CO, MONT, MONT. B. MINES AND GEOL. MEM. 9, P. 32

  • Deposit

    CONSV. COMPL. DATE, 12-09-1971

  • Deposit

    1906 DIREXPL SEN. CLARK-INT. OF BUTTE HIRED MINING EXAMINER

  • Deposit

    1937 DIREXPL J. NORTON-METALLURGICAL AND MINING ENGINEER, BUTTE

  • Deposit

    FOREST SURUSY ASSAYS (FSROI-00128)-(FSROI-00131)

  • Deposit

    1958 COMPILE M.BMG. INF CIRC. 21

General comments

Subject category Comment text
Deposit 5 PATENTED CLAIMS-MARGIE, ROGERS, LUCKY JOE, ROCKEFELLER, INDEPENDENT ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1974 Unknown U.S. Geological Survey
Updater 01-FEB-1980 Doyle, Brien (Wells, John) U.S. Geological Survey

Beyond USGS

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

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