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Ruby Gulch Group

Producer in Phillips county in Montana, United States with commodities Gold, Silver, Fluorine-Fluorite
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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. Ownership information
  17. Production statistics
  18. Workings at the site
  19. Links to other databases
  20. Bibliographic references
  21. General comments
  22. Reporter information

Geologic information

Identification information

Deposit ID 10071371
MRDS ID W014713
Record type Site
Current site name Ruby Gulch Group
Alternate or previous names Ruby, Mint, Badger, Alabama, Independent
Related records 10197473

Geographic coordinates

Geographic coordinates: -108.55634, 47.93132 (WGS84)
Elevation 1457
Relative position ABOUT 1 3/4 NW FROM ZORTMAN, MONTANA

Site location context

Political divisions (FIPS codes)

Phillips(county)

Montana(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Zortman(quadrangle 1:24,000 scale)

Zortman(quadrangle 1:100,000 scale)

Lewistown(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Fort Peck Reservoir(hydrologic unit)

Fort Peck Lake(hydrologic accounting unit)

Missouri-Musselshell(hydrologic subregion)

Missouri(hydrologic region)

Geographic areas

Country State County
United States Montana Phillips

Public Land Survey System information

Meridian Township Range Section Fraction State
Montana Principal 025N 025E 18,07 Montana

Comments on the location information

  • U.T.M. COORDINATES TAKEN ON RUBY MINE

Commodities

Commodity Importance
Gold Primary
Silver Primary
Fluorine-Fluorite Critical Tertiary

Materials information

Materials Type of material
Gold Ore
Pyrite Ore
Fluorite Gangue
Quartz Gangue
Sericite Gangue

Alteration

  • (Local) Sericitization

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Syenite
    Rock unit name Syenite Porphyry Laccolith
    Rock description Syenite Porphyry Laccolith
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Pliocene
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Syenite
    Rock unit name Deadwood Formation, Limestone & Shales;Gneisses And Schists
    Rock description Deadwood Formation, Limestone & Shales;Gneisses And Schists

Nearby scientific data

(1) -108.55634, 47.93132
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Little Rocky Mts. - Domal Uplift Formed By Underlying Intrusions Of Tert. Syenite Porphyry
Type of structure Local
Structure description A Group Of High Angle Gravity Faults Radiate From Dome'S Center In The Porphyry

Ore body information

  • General form SHOOTS

Controls for ore emplacement

  • Ore Confined To Narrow Crushed Zones Between Faults

Economic information about the deposit and operations

Development status Producer
Commodity type Both
Deposit size Small
Significant No
Discovery year 1897
Year of first production 1903

Mining district

District name Little Rockies District

Ownership information

  • Type Operator
    Owner Placer Amax,
    Home office Gatlin Prof. Bldg., Spokane, Wa 99208
  • Type Owner
    Owner Gold Reserve Mining,
    Home office C/O H. Kolstad Estate Chester, Montana

Production statistics

  • Year 1950
    Period 1900 - 1950
    Material AU
    Accuracy Estimate
    Description Cp_Grade: ^About 0.1 Toz/St
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 3g/mt

Comments on the production information

  • PRODUCTION FIGURES FROM TOTAL DISTRICT - MAJORITY OF PRODUCTION FROM ABOUT A HALF DOZEN MAJOR MINES. PRODUCTION YEARS ABOUT 1900 - 1923 , 1937 - 1950

Workings at the site

  • Type of workings Surface/Underground
    Overall depth 60.96M
    Overall length 365.76M
    Overall width 15.24M

Comments on the workings information

  • PRINCIPAL BODY WORKED OVER 500 VERTICAL FEET. MINES OF THE GROUP NOT INTERCONNECTED BUT ON SAME VEIN SYSTEM. PROPERTY UNDER NEW DEVELOPMENT AS OF 1974.

Reference information

Bibliographic references

  • Deposit

    DYSON, J. L., 1953, RUBY GULCH GOLD MINING DISTRICT: IN BILLINGS GEOL. SOC. 4TH ANN. FIELD CONF., SEPT. 1953, LITTLE ROCKY MTS. MT, AND S.W. SASKATCHEWAN.

  • Deposit

    EMMONS, W. H., 1908, GOLD DEPOSITS OF THE LITTLE ROCKY MTNS, MONTANA, U.S. GEOLOGICAL SURVEY BULL. 340.

  • Production

    HUBBARD ET AL, 1964, U.S.B.M. INF. CIRC. 8229., MBMG MEM. 31

General comments

Subject category Comment text
Deposit Discovery Year: LATE 1890'S

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1976 Mlynarczyk, Meg S. U.S. Geological Survey

Beyond USGS

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

Maps centered on this site