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Johnny Gulch Iron

Past Producer in Madison county in Montana, United States with commodities Iron, Gold
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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. Alteration
  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. Land status
  17. Ownership information
  18. Reserves and resources
  19. Workings at the site
  20. Links to other databases
  21. Bibliographic references
  22. General comments
  23. Reporter information

Geologic information

Identification information

Deposit ID 10089454
MRDS ID W026550
Record type Site
Current site name Johnny Gulch Iron
Alternate or previous names Ruby Creek
Related records 10270609

Geographic coordinates

Geographic coordinates: -111.73168, 45.05797 (WGS84)
Elevation 1963
Relative position 21 AIRLINE MILES SOUTH OF ENNIS

Site location context

Political divisions (FIPS codes)

Madison(county)

Montana(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Bucks Nest(quadrangle 1:24,000 scale)

Ennis(quadrangle 1:100,000 scale)

Bozeman(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Madison(hydrologic unit)

Missouri Headwaters(hydrologic accounting unit)

Missouri Headwaters(hydrologic subregion)

Missouri(hydrologic region)

Geographic areas

Country State County
United States Montana Madison

Public Land Survey System information

Meridian Township Range Section Fraction State
Montana Principal 009S 001W 09 Montana

Comments on the location information

  • 1 1/2 MILES SOUTH OF THE YELLOW STONE (CAMERON) TALC MINE

Commodities

Commodity Importance
Iron Primary
Gold Secondary

Materials information

Materials Type of material
Gold Ore
Hematite Ore
Magnetite Ore
Chert Gangue
Dolomite Gangue

Alteration

  • (Local) Muscovite - Chlorite & Biotite - Chlorite Phase Of Green Schist Facies

Analytical data

Result GRADE RANGES FROM 23 TO 34 PERCENT FE GRADE OF GOLD ORE IN QTZ VEIN IN PREE IRON FM UNKNOWN

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Quartzite
    Stratigraphic age (youngest) Neoproterozoic
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Marble
  • Host or associated Host
    Rock type Metamorphic Rock > Phyllite
  • Host or associated Host
    Rock type Metamorphic Rock > Schist
    Rock unit name Iron Formation;Cherry Creek Group
    Rock description Iron Formation;Cherry Creek Group

Nearby scientific data

(1) -111.73168, 45.05797
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description On East Limb Of Gravelly Range Syncline

Ore body information

  • General form TABULAR
    Strike N 40 DEG E
    Dip 80 DEG W
    Length 3048M
    Width 85.34M
    Depth to top 0M
    Depth to bottom 91.44M

Controls for ore emplacement

  • Cherty Mud Deposited Near Shore During Transgressive And Regressive Shoreline Conditions

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Medium
Significant No
Discovery year 1900
Discoverer Isabella & Hazel Daems (1932 - 1963)
Year of first production 1934

Mining district

District name Unorganized

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner Isabella And Hazel Daems

Comments on the production information

  • GRADE AND TONNAGE OF GOLD ORE PRODUCED IN 1934 - 1936 IS NOT KNOWN. MILLING PROCESS OF AU ORE IN EFFICIET SINCE ONLY 44 % RECOVERY REPORTED.

Reserves and resources

  • Type In-situ
    Estimate year 1960
    Total resources 22675000mt ore
    Commodity Subtype Grade units Group Importance Year
    Iron Fe 22 wt-pct Iron Major 1960

Workings at the site

  • Type of workings Underground
    Overall depth 10.67M

Comments on the workings information

  • 66 FT INCLINE SHAFT (DIP IS 32 DEGREES) IS CAVED AT PORTAL. DRIFTS ARE REPORTED ON 3 LEVELS

Reference information

Bibliographic references

  • Deposit

    HOGBERG, R. K., 1960 , GEOLOGY OF THE RUBY CREEK IRON DEPOSIT, MADISON CO. MT. 11TH ANN. FIELD CONF., 1960 BILLINGS GEOL. SOC.

  • Deposit

    DEMUNK, V. C., 1956 , IRON DEPOSITS IN MONTANA: MONTANA BUREAU OF MINES AND GEOLOGY INFORMATION CIRCULAR 13 , P. 41.

  • Deposit

    BAYLEY, R. W., AND JAMES, H. L., 1973 , PRECAMBRIAN IRON FORMATIONS OF THE U. S.: ECON GEOL. VOL. 68 , NO. 7

  • Deposit

    HOGBERG, R.K., 1960, GEOLOGY OF THE RUBY CREEK IRON DEPOSIT, MADISON COUNTY, MONTANA, IN 11TH ANNUAL FIELD CONFERENCE, BILLINGS GEOLOGICAL SOCIETY.

  • Deposit

    MONTANA BUREAU OF MINES AND GEOLOGY,(N.D.), UNPUBLISHED SUMMARY OF INFORMATION ON IRON ORE, BITUMINOUS COAL, FLUORITE, AND CHROMITE: MONTANA BUREAU OF MINES AND GEOLOGY.

  • Deposit

    DEMUNK, V.C., 1956, IRON DEPOSITS IN MONTANA: MONTANA BUREAU OF MINES AND GEOLOGY INFORMATION CIRCULAR 13.

  • Deposit

    1956 COMPILE MBMG REPORT (INFORMATION CIRCULAR)

  • Deposit

    1960 GEOLMAP NORTHERN PAC. R. R. REPORT, 11TH ANN CONF. BGS

  • Deposit

    1969 COMPILE MBMG, SUMMARY REPORT (UNPUBLISHED)

General comments

Subject category Comment text
Deposit TWO ORE BEDS, AN FESILICATE - CHERT BED AND A MAGNETITE - CHERT BED TOTALLING 280 FT THICK

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1977 Johns, Willis M.; R. B. Berg U.S. Geological Survey

Beyond USGS

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

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